10V references offer excellent accuracy and very low .... mV. Long-Term Output
Drift. 50 ppm/kh. TEMP PIN. Voltage Output. VTEMP. TA = +25°C. 570. mV.
19-0038; Rev 3; 6/07
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References The MAX873/MAX875/MAX876 precision 2.5V, 5V, and 10V references offer excellent accuracy and very low power consumption. Extremely low temperature drift combined with excellent line and load regulation permit stable operation over a wide range of electrical and environmental conditions. Operation for the MAX873 is guaranteed with a +4.5V supply, making the part ideal in systems running from a +5V ±10% supply. Low 10Hz to 1kHz noise—typically 3.8µVRMS, 9µVRMS, and 18µVRMS, respectively, for the MAX873, MAX875, MAX876—make the parts suitable for 12-bit data-acquisition systems. A TRIM pin facilitates adjustment of the reference voltage over a ±6% range, using only a 100kΩ potentiometer. A voltage output proportional to temperature provides a source for temperature compensation circuits, temperature warning circuits, and other applications.
Features ♦ MAX873/MAX875/MAX876 +2.5V/+5V/+10V Outputs ±1.5mV/±2.0mV/±3.0mV (max) Initial Accuracy ♦ 7ppm/°C (max) Temperature Coefficient ♦ 450µA (max) Quiescent Current ♦ Low Noise: 3.8µVP-P (typ at 2.5V) ♦ Sources 10mA, Sinks 2mA ♦ 15ppm/mA Load Regulation (max) ♦ 4ppm/V Line Regulation (max) ♦ Wide Supply Voltage Range, +4.5V to +18V (MAX873) ♦ TEMP Output Proportional to Temperature
Applications 12-Bit ADCs and DACs
Typical Operating Circuit V+
Digital Multimeters Portable Data-Acquisition Systems
IN
Low-Power Test Equipment 0.1µF*
MAX873 MAX875 MAX876
+2.5V (MAX873) +5.0V (MAX875) +10.0V (MAX876)
GND
*OPTIONAL
Pin Configuration appears at end of data sheet.
OUT
0V
Ordering Information/Selector Guide PINPACKAGE
PART
OUTPUT VOLTAGE (V)
MAX TEMPCO (ppm/°C)
INITIAL ACCURACY %
PKG CODE S8-4
MAX873AESA+
8 SO
2.500
7
± 0.06
MAX873BESA+
8 SO
2.500
20
± 0.10
S8-4
MAX875AESA+
8 SO
5.000
7
± 0.04
S8-4
MAX875BESA+
8 SO
5.000
20
± 0.06
S8-4
MAX876AESA+
8 SO
10.000
7
± 0.03
S8-4
± 0.05
S8-4
MAX876BESA+ 8 SO 10.000 20 +Denotes a lead-free package. Note: All devices are specified over the -40°C to +85°C operating temperature range.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX873/MAX875/MAX876
General Description
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +20V OUT, TRIM, TEMP, TEST ..............................- 0.3V to (IN + 0.3V) Output Short-Circuit Duration (to GND)....................................5s Continuous Power Dissipation (TA = +70°C) SO (derate 5.88mW/°C above +70°C) .........................471mW
Operating Temperature Ranges: MAX87_ _E_A ..................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Junction Temperature (TJ) ...............................................+150°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX873 (VIN = +5V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER Output Voltage Output-Voltage Drift (Note 1) Output-Noise Voltage
SYMBOL VOUT TCVOUT en
Line Regulation
CONDITIONS
2.4985
2.5000
2.5015
2.4975
2.5000
2.5025
MAX873A
2
7
MAX873B
5
20
TA = +25°C
IL = 0 to -1mA (sink)
ISC
UNITS V ppm/°C
0.1Hz to 10Hz
3.8
µVP-P
10Hz to 1kHz
6.8
µVRMS
TA = +25°C
1
4.0
TA = -40°C to +85°C
2
6
TA = +25°C
3
15
TA = -40°C to +85°C
Load Regulation
Short-Circuit Output Current
MAX
MAX873A (0.06%)
IL = 0 to 10mA (source)
IQ
TYP
MAX873B (0.10%)
TA = +25°C
VIN = 4.5V to 18V
Quiescent Supply Current
MIN
3
20
TA = +25°C
100
900
TA = -40°C to +85°C
150
1900
TA = +25°C
300
450
TA = -40°C to +85°C
300
600
Output shorted to GND
60
VOUT Adjust Range Long-Term Output Drift
ppm/V
ppm/mA
µA mA
±100
mV
50
ppm/kh
TEMP PIN Voltage Output Temperature Sensitivity
VTEMP
TA = +25°C
TCVTEMP
570
mV
1.9
mV/°C
ELECTRICAL CHARACTERISTICS—MAX875 (VIN = +15V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER Output Voltage Output Voltage Drift (Note 1) Output-Noise Voltage Line Regulation
2
SYMBOL VOUT TCVOUT en
CONDITIONS TA = +25°C
MIN
TYP
MAX
MAX875A (0.04%)
4.998
5.000
5.002
MAX875B (0.06%)
4.997
5.000
5.003
MAX875A
2
7
MAX875B
5
20
TA = +25°C VIN = 7V to 18V
UNITS V ppm/°C
0.1Hz to 10Hz
9
µVP-P
10Hz to 1kHz
14.5
µVRMS
TA = +25°C
1
4.0
TA = -40°C to +85°C
2
6
_______________________________________________________________________________________
ppm/V
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References (VIN = +15V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER
SYMBOL
CONDITIONS IL = 0 to 10mA (source)
Load Regulation IL = 0 to -1mA (sink) Quiescent Supply Current
IQ
Short-Circuit Output Current
ISC
MIN
TYP
MAX
TA = +25°C
3
15
TA = -40°C to +85°C
3
20
TA = +25°C
100
900
TA = -40°C to +85°C
150
1900
TA = +25°C
320
550
TA = -40°C to +85°C
320
700
Output shorted to GND
60
VOUT Adjust Range Long-Term Output Drift
UNITS
ppm/mA
µA mA
±300
mV
50
ppm/kh
TEMP PIN Voltage Output
VTEMP
Temperature Sensitivity
TA = +25°C
TCVTEMP
630
mV
2.1
mV/°C
ELECTRICAL CHARACTERISTICS—MAX876 (VIN = +15V, IL = 0mA, CLOAD < 100pF, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER Output Voltage
SYMBOL VOUT
Output Voltage Drift (Note 1)
TCVOUT
Output-Noise Voltage
en
Line Regulation
CONDITIONS TA = +25°C
9.997
10.000
10.003
MAX876B (0.05%)
9.995
10.000
10.005 7
5
20
TA = +25°C
IL = 0 to -1mA (sink)
ISC
MAX876A (0.03%)
2
Load Regulation
Short-Circuit Output Current
MAX
MAX876B
IL = 0 to 10mA (source)
IQ
TYP
MAX876A
VIN = 12V to 18V
Quiescent Supply Current
MIN
0.1Hz to 10Hz
18
10Hz to 1kHz
29
TA = +25°C
1
4.0
TA = -40°C to +85°C
1
6
TA = +25°C
1
15
TA = -40°C to +85°C
1
20
TA = +25°C
100
900
TA = -40°C to +85°C
150
1900 550
TA = -40°C to +85°C
340
700
Long-Term Output Drift
ppm/°C
µVRMS
320
Output shorted to GND
V
µVP-P
TA = +25°C
VOUT Adjust Range
UNITS
60
ppm/V
ppm/mA
µA mA
±600
mV
50
ppm/kh
TEMP PIN Voltage Output
VTEMP
Temperature Sensitivity
TCVTEMP
TA = +25°C
630
mV
2.1
mV/°C
Note 1: Temperature coefficient is defined as maximum ∆VOUT divided by maximum ∆T of the temperature range.
_______________________________________________________________________________________
3
MAX873/MAX875/MAX876
ELECTRICAL CHARACTERISTICS—MAX875 (continued)
Typical Operating Characteristics (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
2.500
2.499
MAX873/75/76 toc02
LOAD REGULATION vs. SOURCE CURRENT (VOUT = 2.5V)
10.001 10.000 9.999 9.998 9.997 9.996 9.995 9.994
THREE TYPICAL PARTS 2.498 -25
0
25
50
75
100
125
0
-0.25 TA = +125°C
-50
-25
0
25
50
75
100
-0.50
125
0
5
10
15
20
25
TEMPERATURE (°C)
SOURCE CURRENT (mA)
LOAD REGULATION vs. SOURCE CURRENT (VOUT = 10V)
LOAD REGULATION vs. SINK CURRENT (VOUT = 2.5V)
LOAD REGULATION vs. SINK CURRENT (VOUT = 10V)
0
-0.25 TA = -40°C -0.50
TA = +25°C
0.50 TA = +125°C 0.25 0
TA = -40°C -0.25
5
10
15
20
25
30
TA = -40°C TA = +125°C
0.5 0
TA = +25°C
-0.5 -1.0
-0.50 0
1.5 1.0
30
MAX873/75/76 toc06
0.75
2.0 OUTPUT VOLTAGE CHANGE (mV)
TA = +125°C
MAX873/75/76 toc05
TA = +25°C 0.25
1.00 OUTPUT VOLTAGE CHANGE (mV)
MAX873/75/76 toc04
0
0.5
1.0
1.5
0
2.0
0.5
1.0
1.5
2.0
SOURCE CURRENT (mA)
SINK CURRENT (mA)
SINK CURRENT (mA)
LINE REGULATION vs. TEMPERATURE (VOUT = 2.5V)
LINE REGULATION vs. TEMPERATURE (VOUT = 10V)
MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 2.5V)
60 TA = +125°C 40
20
250 TA = +125°C 200 TA = -40°C
150 100 50
10
15
20
25
INPUT VOLTAGE (V)
30
35
40
TA = +125°C 1.5 TA = +25°C 1.0
TA = -40°C
0.5
0 5
2.0
TA = +25°C
TA = +25°C 0
MAX873/75/76 toc09
TA = -40°C
2.5
DROPOUT VOLTAGE (V)
80
300
OUTPUT VOLTAGE CHANGE (µV)
MAX873/75/76 toc07
100
MAX873/75/76 toc08
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TEMPERATURE (°C)
0.50
0
TA = -40°C
0.25
THREE TYPICAL PARTS
9.993 -50
4
0.50 OUTPUT VOLTAGE CHANGE (mV)
10.002
OUTPUT VOLTAGE (V)
2.501 OUTPUT VOLTAGE (V)
10.003
MAX873/75/76 toc01
2.502
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 10V)
MAX873/75/76 toc03
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.5V)
OUTPUT VOLTAGE CHANGE (µV)
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References
12
16
20
24
28
32
INPUT VOLTAGE (V)
36
40
0
4
8
12
SOURCE CURRENT (mA)
_______________________________________________________________________________________
16
20
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References MAX873/MAX875/MAX876
Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
-40
TA = +25°C
-20 -40 PSRR (dB)
PSRR (dB)
1.5
MAX873/75/76 toc12
-20
TA = +125°C
0
MAX873/75/76 toc11
2.0
DROPOUT VOLTAGE (V)
0
MAX873/75/76 toc10
2.5
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 10V)
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V)
MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 10V)
-60 -80
-60 -80
-100
TA = -40°C
1.0
-100
-120 -140 0.001
0.5 0
4
8
12
16
20
0.1
1
10
100
-120 0.001
1000
0.01
0.1
1
10
100
1000
SOURCE CURRENT (mA)
FREQUENCY (kHz)
FREQUENCY (kHz)
OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 2.5V)
SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 2.5V)
SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 10V)
0.1
350 300
TA = +25°C
250 TA = -40°C
200 150
400
MAX873/75/76 toc15
TA = +125°C
TA = +125°C
350 SUPPLY CURRENT (µA)
1
MAX873/75/76 toc14
10
400
SUPPLY CURRENT (µA)
MAX873/75/76 toc13
100
OUTPUT IMPEDANCE (Ω)
0.01
300 250
TA = +25°C
200 TA = -40°C
150
100
100
50
50
0.01
0.01
0.1
1
10
100
0
1000
5
10
15
20
25
30
35
0
40
5
10
15
20
25
30
35
FREQUENCY (kHz)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE (VOUT = 2.5V)
SUPPLY CURRENT vs. TEMPERATURE (VOUT = 10V)
TEMP VOLTAGE vs. TEMPERATURE (VOUT = 2.5V)
275
325
300
-25
0
25
50
75
TEMPERATURE (°C)
100
125
600
400
250 -50
700
500
275
250
MAX873/75/76 toc18
350
40
800
TEMP VOLTAGE (mV)
300
MAX873/75/76 toc17
325
375
SUPPLY CURRENT (µA)
MAX873/75/76 toc16
350
SUPPLY CURRENT (µA)
0
0
0.001
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
600
2.60
TWO TYPICAL PARTS 2.501
2.55 VOUT (V)
700
2.502
MAX873/75/76 toc20
800
2.65
OUTPUT VOLTAGE (V)
MAX873/75/76 toc19
900
2.50
2.500
2.45 2.499
500
2.40
400
2.498
2.35 -25
0
25
50
75
100
125
0
0.5
1.0
1.5
2.0
200
400
800
TIME (hours)
LONG-TERM STABILITY vs. TIME (VOUT = 10.0V)
OUTPUT-VOLTAGE NOISE DENSITY vs. FREQUENCY (VOUT = 2.5V)
OUTPUT-VOLTAGE NOISE DENSITY vs. FREQUENCY (VOUT = 10V)
10.000
9.999
9.998
100 200
400
600
800
1000
10,000
1000
100 0.1
1
TIME (hours)
10 100 FREQUENCY (Hz)
1000
0.1
1
10 100 FREQUENCY (Hz)
0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 10V)
0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 2.5V)
MAX873/75/76 toc26
MAX873/75/76 toc25
4µV/div
1µV/div
1s/div
1000
MAX873/75/76 toc24
10.001
1000
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
MAX873/75/76 toc22
TWO TYPICAL PARTS
6
600
TRIM VOLTAGE (V)
10.002
0
0
2.5
TEMPERATURE (°C)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
-50
MAX873/75/76 toc23
TEMP VOLTAGE (mV)
LONG-TERM STABILITY vs. TIME (VOUT = 2.500V)
OUTPUT VOLTAGE vs. TRIM VOLTAGE (VOUT = 2.5V)
MAX873/75/76 toc21
TEMP VOLTAGE vs. TEMPERATURE (VOUT = 10V)
VOUT (V)
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References
1s/div
_______________________________________________________________________________________
1000
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References MAX873/MAX875/MAX876
Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO 20mA)
LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO 20mA)
MAX873/75/76 toc28
MAX873/75/76 toc27
20mA IOUT
20mA IOUT
0
0 VOUT AC-COUPLED 1V/div
VOUT AC-COUPLED 1V/div
10µs/div
10µs/div
LOAD TRANSIENT (VOUT = 10V, COUT = 1µF, 0 TO 20mA)
LOAD TRANSIENT (VOUT = 2.5V, COUT = 1µF, 0 TO +20mA)
MAX873/75/76 toc30
MAX873/75/76 toc29
20mA 20mA IOUT
IOUT
0
0
VOUT AC-COUPLED 50mV/div
VOUT AC-COUPLED 100mV/div
100µs/div
200µs/div
LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO -2mA)
LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO -2mA)
MAX873/75/76 toc32
MAX873/75/76 toc31
0
0
IOUT
40µs/div
IOUT
-2mA
-2mA
VOUT AC-COUPLED 200mV/div
VOUT AC-COUPLED 20mV/div
200µs/div
_______________________________________________________________________________________
7
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) LOAD TRANSIENT (VOUT = 10V, COUT = 1µF, 0 TO -2mA)
LOAD TRANSIENT (VOUT = 2.5V, COUT = 1µF, 0 TO -2mA)
MAX873/75/76 toc34
MAX873/75/76 toc33
0
0
IOUT
IOUT
-2mA
-2mA
VOUT AC-COUPLED 20mV/div
VOUT AC-COUPLED 5mV/div
400µs/div
400µs/div
LINE TRANSIENT (VOUT = 10V)
LINE TRANSIENT (VOUT = 2.5V) MAX873/75/76 toc35
MAX873/75/76 toc36
5.5V
4.5V
15.5V VIN 1V/div 14.5V
VOUT AC-COUPLED 200mV/div
VOUT AC-COUPLED 200mV/div
VIN
COUT = 0 2µs/div
10µs/div
TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 0)
TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 1µF) MAX873/75/76 toc38
MAX873/75/76 toc37
VIN 2V/div VIN 2V/div
GND
GND VOUT 1V/div VOUT 1V/div
GND COUT = 0 10µs/div
8
GND 40µs/div
_______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) TURN-ON TRANSIENT (VOUT = 10V, COUT = 0)
TURN-ON TRANSIENT (VOUT = 10V, COUT = 1µF)
MAX873/75/76 toc39
MAX873/75/76 toc40
VIN 5V/div
VIN 5V/div GND
GND
VOUT 5V/div
VOUT 5V/div
GND
GND
100µs/div
200µs/div
Pin Description PIN
NAME
FUNCTION
1, 8
I.C.
Internally Connected. Do not connect externally.
2
IN
Positive Power-Supply Input
3
TEMP
Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die temperature.
4
GND
Ground
5
TRIM
Output Voltage Trim. Connect TRIM to the center of a voltage-divider between OUT and GND for trimming. Leave unconnected to use the preset output voltage.
6
OUT
Output Voltage
7
N.C.
No Connection. Not internally connected.
Detailed Description The MAX873/MAX875/MAX876 precision voltage references provide accurate preset +2.5V, +5.0V, and +10V reference voltages from up to +40V input voltages. These devices feature a proprietary temperature-coefficient curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low 3ppm/°C temperature coefficient and excellent 0.05% initial accuracy. The MAX873/MAX875/MAX876 draw 340µA of supply current and source 30mA or sink 2mA of load current.
Trimming the Output Voltage Trim the factory-preset output voltage on the MAX873/MAX875/MAX876 by placing a resistive divider network between OUT, TRIM, and GND.
Use the following formula to calculate the change in output voltage from its preset value: ∆VOUT = 2 x (VTRIM - VTRIM (open)) x k where: VTRIM = 0V to VOUT VTRIM (open) = VOUT (nominal) / 2 (typ) k = ±6% (typ) For example, use a 50kΩ potentiometer (such as the MAX5436) between OUT, TRIM, and GND with the potentiometer wiper connected to TRIM (see Figure 2). As the TRIM voltage changes from VOUT to GND, the output voltage changes accordingly. Set R2 to 1MΩ or less. Currents through resistors R1 and R2 add to the quiescent supply current.
_______________________________________________________________________________________
9
MAX873/MAX875/MAX876
Typical Operating Characteristics (continued)
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References Temp Output The MAX873/MAX875/MAX876 provide a temperature output proportional to die temperature. TEMP can be calculated from the following formula: TEMP (V) = TJ (°K) x n where TJ = the die temperature, n = the temperature multiplier, n =
VTEMP (at TJ = T0 ) ≅ 1.9mV / °K T0
TA = the ambient temperature. Self-heating affects the die temperature and conversely, the TEMP output. The TEMP equation assumes the output is not loaded. If device power dissipation is negligible, then TJ ≈ TA.
Applications Information Bypassing/Output Capacitance For the best line-transient performance, decouple the input with a 0.1µF ceramic capacitor as shown in the Typical Operating Circuit. Place the capacitor as close to IN as possible. When transient performance is less important, no capacitor is necessary. The MAX873/MAX875/MAX876 do not require an output capacitor for stability and are stable with capacitive loads up to 100µF. In applications where the load or the
supply can experience step changes, a larger output capacitor reduces the amount of overshoot (undershoot) and improves the circuit’s transient response. Place output capacitors as close to the devices as possible for best performance.
Supply Current The MAX873/MAX875/MAX876 consume 320µA (typ) of quiescent supply current. This improved efficiency reduces power dissipation and extends battery life.
Thermal Hysteresis Thermal hysteresis is the change in the output voltage at TA = +25°C before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the bandgap core transistors. The typical thermal hysteresis value is 120ppm.
Turn-On Time The MAX873/MAX875/MAX876 typically turn on and settle to within 0.1% of the preset output voltage in 150µs (2.5V output). The turn-on time can increase up to 150µs with the device operating with a 1µF load.
Short-Circuited Outputs The MAX873/MAX875/MAX876 feature a short-circuit-protected output. Internal circuitry limits the output current to 60mA when short circuiting the output to ground. The output current is limited to 3mA when short circuiting the output to the input.
10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/°C)
8-BIT 10
10-BIT 12-BIT
1
14-BIT 16-BIT
0.1
18-BIT 0.01 1
10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)
20-BIT 100
Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
10
______________________________________________________________________________________
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References
In a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range. Figure 1 shows the maximum allowable reference-voltage temperature coefficient to keep the conversion error to less than 1 LSB, as a function of the operating temperature range (TMAX - TMIN) with the converter resolution as a parameter. The graph assumes the reference-voltage temperature coefficient as the only parameter affecting accuracy. In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltagereference changes.
( VOUT + 2V) TO 40V INPUT
IN
OUT
*
MAX873 MAX875 MAX876 TEMP
TRIM
REFERENCE OUTPUT
MAX5436 50kΩ POTENTIOMETER
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potentiometer
Pin Configuration
Chip Information TRANSISTOR COUNT: 429 PROCESS: BiCMOS
TOP VIEW I.C.*
1
IN
2
TEMP
3
MAX873 MAX875 MAX876
GND 4
8
I.C.*
7
N.C.
6
OUT
5
TRIM
SO *INTERNALLY CONNECTED. DO NOT CONNECT.
______________________________________________________________________________________
11
MAX873/MAX875/MAX876
Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
DIM A A1 B C e E H L
N
E
H
INCHES
MILLIMETERS
MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40
SOICN .EPS
MAX873/MAX875/MAX876
Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References
1.27
VARIATIONS: 1
INCHES
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
MILLIMETERS MIN 4.80 8.55 9.80
MAX 5.00 8.75 10.00
N MS012 8 AA 14 AB 16 AC
D A B
e
C
0∞-8∞
A1 L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1 1
Revision History Pages changed at Rev 3: 1–12
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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is a registered trademark of Maxim Integrated Products, Inc.
