MAXIM MAX873, MAX875, MAX876 Technical data

General Description

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 3.8µV

RMS

, 9µV

RMS

, and 18µV

RMS

, 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.

Applications

12-Bit ADCs and DACs

Digital Multimeters

Portable Data-Acquisition Systems

Low-Power Test Equipment

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: 3.8µV

P-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

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V

Precision Voltage References

________________________________________________________________

Maxim Integrated Products

19-0038; Rev 3; 6/07

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.

Ordering Information/Selector Guide

+2.5V (MAX873) +5.0V (MAX875)

+10.0V (MAX876)

*OPTIONAL

V+

GND

0.1µF* OUT

MAX873 MAX875 MAX876

Typical Operating Circuit

Pin Configuration appears at end of data sheet.

Denotes a lead-free package.

Note: All devices are specified over the -40°C to +85°C operating temperature range.

OUTPUT

VOLTAGE

(V)

PINPACKAGE

PART

MAX873AESA+ 8 SO 2.500 7 ± 0.06 S8-4

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

MAX876BESA+ 8 SO 10.000 20 ± 0.05 S8-4

MAX TEMPCO (ppm/°C)

INITIAL

ACCURACY

PKG

CODE

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

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 (T

= +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 (T

) ...............................................+150°C

ELECTRICAL CHARACTERISTICS—MAX873

(VIN= +5V, IL= 0mA, C

LOAD

< 100pF, TA= -40°C to +85°C, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS—MAX875

(VIN= +15V, IL= 0mA, C

LOAD

< 100pF, TA= -40°C to +85°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Voltage V

Output-Voltage Drift (Note 1)

Output-Noise Voltage e

Line Regulation VIN = 4.5V to 18V

Load Regulation

Quiescent Supply Current I

Short-Circuit Output Current I

Adjust Range ±100 mV

OUT

Long-Term Output Drift 50 ppm/kh

TEMP PIN

Voltage Output V

Temperature Sensitivity TCV

OUT

TCV

TEMPTA

TA = +25°C

MAX873A 2 7

OUT

MAX873B 5 20

TA = +25°C

IL = 0 to 10mA (source)

= 0 to -1mA (sink)

TA = +25°C 300 450

TA = -40°C to +85°C 300 600

Output shorted to GND 60 mA

= +25°C 570 mV

TEMP

MAX873A (0.06%) 2.4985 2.5000 2.5015

MAX873B (0.10%) 2.4975 2.5000 2.5025

0.1Hz to 10Hz 3.8 µV

10Hz to 1kHz 6.8 µV

TA = +25°C 1 4.0

= -40°C to +85°C 2 6

TA = +25°C 3 15

= -40°C to +85°C 3 20

TA = +25°C 100 900

= -40°C to +85°C 150 1900

1.9 mV/°C

ppm/°C

P-P

RMS

ppm/V

ppm/mA

µA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Voltage V

Output Voltage Drift (Note 1)

Output-Noise Voltage e

Line Regulation VIN = 7V to 18V

MAX875A (0.04%) 4.998 5.000 5.002

MAX875B (0.06%) 4.997 5.000 5.003

0.1Hz to 10Hz 9 µV

10Hz to 1kHz 14.5 µV

TA = +25°C 1 4.0

= -40°C to +85°C 2 6

TCV

OUT

TA = +25°C

MAX875A 2 7

MAX875B 5 20

TA = +25°C

ppm/°C

P-P

RMS

ppm/V

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V

Precision Voltage References

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX875 (continued)

(VIN= +15V, IL= 0mA, C

LOAD

< 100pF, TA= -40°C to +85°C, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS—MAX876

(VIN= +15V, IL= 0mA, C

LOAD

< 100pF, TA= -40°C to +85°C, unless otherwise noted.)

Note 1: Temperature coefficient is defined as maximum ∆V

OUT

divided by maximum ∆T of the temperature range.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Load Regulation

Quiescent Supply Current I

Short-Circuit Output Current I

Adjust Range ±300 mV

OUT

Long-Term Output Drift 50 ppm/kh

TEMP PIN

Voltage Output V

Temperature Sensitivity TCV

IL = 0 to 10mA (source)

TA = +25°C 320 550

TA = -40°C to +85°C 320 700

Output shorted to GND 60 mA

TEMPTA

TEMP

= 0 to -1mA (sink)

= +25°C 630 mV

TA = +25°C 3 15

= -40°C to +85°C 3 20

TA = +25°C 100 900

= -40°C to +85°C 150 1900

2.1 mV/°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Voltage V

Output Voltage Drift (Note 1)

Output-Noise Voltage e

Line Regulation VIN = 12V to 18V

Load Regulation

Quiescent Supply Current I

Short-Circuit Output Current I

Adjust Range ±600 mV

OUT

Long-Term Output Drift 50 ppm/kh

TEMP PIN

Voltage Output V

Temperature Sensitivity TCV

OUT

TCV

OUT

TEMPTA

TEMP

TA = +25°C

MAX876A 2 7

MAX876B 5 20

TA = +25°C

IL = 0 to 10mA (source)

= 0 to -1mA (sink)

TA = +25°C 320 550

TA = -40°C to +85°C 340 700

Output shorted to GND 60 mA

= +25°C 630 mV

MAX876A (0.03%) 9.997 10.000 10.003

MAX876B (0.05%) 9.995 10.000 10.005

0.1Hz to 10Hz 18 µV

10Hz to 1kHz 29 µV

TA = +25°C 1 4.0

= -40°C to +85°C 1 6

TA = +25°C 1 15

= -40°C to +85°C 1 20

TA = +25°C 100 900

= -40°C to +85°C 150 1900

2.1 mV/°C

ppm/mA

µA

ppm/°C

P-P

RMS

ppm/V

ppm/mA

µA

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VIN= +5V for V

OUT

= +2.5V, VIN= +15V for V

OUT

= +10V, I

OUT

= 0, TA= +25°C, unless otherwise noted.)

2.498

2.500

2.499

2.501

2.502

OUTPUT VOLTAGE vs. TEMPERATURE

OUT

= 2.5V)

MAX873/75/76 toc01

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

-50 25 50-25 0 75 100 125

THREE TYPICAL PARTS

9.993

9.998

9.995

10.001

9.999

9.996

10.002

9.997

9.994

10.000

10.003

OUTPUT VOLTAGE vs. TEMPERATURE

OUT

= 10V)

MAX873/75/76 toc02

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

-50 25 50-25 0 75 100 125

THREE TYPICAL PARTS

0.50

0.25

-0.25

-0.50 015510 202530

LOAD REGULATION vs.

SOURCE CURRENT (V

OUT

= 2.5V)

MAX873/75/76 toc03

SOURCE CURRENT (mA)

OUTPUT VOLTAGE CHANGE (mV)

TA = -40°C

TA = +125°C

TA = +25°C

0.50

0.25

-0.25

-0.50 015510 202530

LOAD REGULATION

vs. SOURCE CURRENT (V

OUT

= 10V)

MAX873/75/76 toc04

SOURCE CURRENT (mA)

OUTPUT VOLTAGE CHANGE (mV)

TA = +25°C

TA = +125°C

TA = -40°C

1.00

0.75

0.50

0.25

-0.25

-0.50

01.00.5 1.5 2.0

LOAD REGULATION

vs. SINK CURRENT (V

OUT

= 2.5V)

MAX873/75/76 toc05

SINK CURRENT (mA)

OUTPUT VOLTAGE CHANGE (mV)

TA = +25°C

TA = +125°C

TA = -40°C

2.0

1.5

1.0

0.5

-0.5

-1.0

01.00.5 1.5 2.0

LOAD REGULATION

vs. SINK CURRENT (V

OUT

= 10V)

MAX873/75/76 toc06

SINK CURRENT (mA)

OUTPUT VOLTAGE CHANGE (mV)

TA = -40°C

TA = +125°C

TA = +25°C

100

LINE REGULATION vs. TEMPERATURE

OUT

= 2.5V)

MAX873/75/76 toc07

INPUT VOLTAGE (V)

OUTPUT VOLTAGE CHANGE (µV)

020255 1015 303540

TA = -40°C

TA = +125°C

TA = +25°C

150

100

200

250

300

LINE REGULATION vs. TEMPERATURE

OUT

= 10V)

MAX873/75/76 toc08

INPUT VOLTAGE (V)

OUTPUT VOLTAGE CHANGE (µV)

12 28 3216 20 24 36 40

TA = -40°C

TA = +125°C

TA = +25°C

0.5

1.5

1.0

2.0

2.5

MINIMUM INPUT-OUTPUT DIFFERENTIAL

vs. SOURCE CURRENT (V

OUT

= 2.5V)

MAX873/75/76 toc09

SOURCE CURRENT (mA)

DROPOUT VOLTAGE (V)

0121648 20

TA = -40°C

TA = +125°C

TA = +25°C

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V

Precision Voltage References

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VIN= +5V for V

OUT

= +2.5V, VIN= +15V for V

OUT

= +10V, I

OUT

= 0, TA= +25°C, unless otherwise noted.)

0.5

1.5

1.0

2.0

2.5

MINIMUM INPUT-OUTPUT DIFFERENTIAL

vs. SOURCE CURRENT (V

OUT

= 10V)

MAX873/75/76 toc10

SOURCE CURRENT (mA)

DROPOUT VOLTAGE (V)

0121648 20

TA = -40°C

TA = +125°C

TA = +25°C

-140

-100

-120

-60

-80

-20

-40

0.001 0.1 10.01 10 100 1000

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (V

OUT

= 2.5V)

MAX873/75/76 toc11

FREQUENCY (kHz)

PSRR (dB)

-120

-100

-60

-80

-20

-40

0.001 0.1 10.01 10 100 1000

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY (V

OUT

= 10V)

MAX873/75/76 toc12

FREQUENCY (kHz)

PSRR (dB)

0.001

0.1

0.01

100

0.1 10.01 10 100 1000

OUTPUT IMPEDANCE vs. FREQUENCY

OUT

= 2.5V)

MAX873/75/76 toc13

FREQUENCY (kHz)

OUTPUT IMPEDANCE (Ω)

100

200

150

250

300

350

400

010155 2025303540

SUPPLY CURRENT vs. INPUT VOLTAGE

OUT

= 2.5V)

MAX873/75/76 toc14

INPUT VOLTAGE (V)

SUPPLY CURRENT (µA)

TA = -40°C

TA = +125°C

TA = +25°C

100

200

150

250

300

350

400

010155 2025303540

SUPPLY CURRENT vs. INPUT VOLTAGE

OUT

= 10V)

MAX873/75/76 toc15

INPUT VOLTAGE (V)

SUPPLY CURRENT (µA)

TA = -40°C

TA = +125°C

TA = +25°C

250

300

275

325

350

-50 -25 0 25 50 75 100 125

SUPPLY CURRENT vs. TEMPERATURE

OUT

= 2.5V)

MAX873/75/76 toc16

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

250

325

300

275

350

375

-50 -25 0 25 50 75 100 125

SUPPLY CURRENT vs. TEMPERATURE

OUT

= 10V)

MAX873/75/76 toc17

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

400

600

500

700

800

-50 -25 0 25 50 75 100 125

TEMP VOLTAGE

vs. TEMPERATURE (V

OUT

= 2.5V)

MAX873/75/76 toc18

TEMPERATURE (°C)

TEMP VOLTAGE (mV)

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VIN= +5V for V

OUT

= +2.5V, VIN= +15V for V

OUT

= +10V, I

OUT

= 0, TA= +25°C, unless otherwise noted.)

400

600

500

800

700

900

-50 -25 0 25 50 75 100 125

TEMP VOLTAGE

vs. TEMPERATURE (V

OUT

= 10V)

MAX873/75/76 toc19

TEMPERATURE (°C)

TEMP VOLTAGE (mV)

2.35

2.50

2.45

2.40

2.60

2.55

2.65

0 0.5 1.0 1.5 2.0 2.5

OUTPUT VOLTAGE

vs. TRIM VOLTAGE (V

OUT

= 2.5V)

MAX873/75/76 toc20

TRIM VOLTAGE (V)

OUTPUT VOLTAGE (V)

2.498

2.500

2.499

2.501

2.502

0 200 400 600 800 1000

LONG-TERM STABILITY vs. TIME

OUT

= 2.500V)

MAX873/75/76 toc21

TIME (hours)

OUT

(V)

TWO TYPICAL PARTS

9.998

10.000

9.999

10.001

10.002

0 200 400 600 800 1000

LONG-TERM STABILITY vs. TIME

OUT

= 10.0V)

MAX873/75/76 toc22

TIME (hours)

OUT

(V)

TWO TYPICAL PARTS

1000

100

OUTPUT-VOLTAGE NOISE DENSITY

vs. FREQUENCY (V

OUT

= 2.5V)

MAX873/75/76 toc23

FREQUENCY (Hz)

OUTPUT VOLTAGE-NOISE DENSITY (nV/√

)

0.1 100 1000110

10,000

1000

100

OUTPUT-VOLTAGE NOISE DENSITY

vs. FREQUENCY (V

OUT

= 10V)

MAX873/75/76 toc24

FREQUENCY (Hz)

OUTPUT VOLTAGE-NOISE DENSITY (nV/√

)

0.1 100 1000110

0.1Hz TO 10Hz OUTPUT NOISE (V

OUT

= 2.5V)

MAX873/75/76 toc25

1µV/div

1s/div

0.1Hz TO 10Hz OUTPUT NOISE (V

OUT

= 10V)

MAX873/75/76 toc26

4µV/div

1s/div

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V

Precision Voltage References

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VIN= +5V for V

OUT

= +2.5V, VIN= +15V for V

OUT

= +10V, I

OUT

= 0, TA= +25°C, unless otherwise noted.)

LOAD TRANSIENT

OUT

= 2.5V, C

OUT

= 0, 0 TO 20mA)

MAX873/75/76 toc27

OUT

AC-COUPLED 1V/div

20mA

10µs/div

LOAD TRANSIENT

OUT

= 10V, C

OUT

= 0, 0 TO 20mA)

MAX873/75/76 toc28

OUT

AC-COUPLED 1V/div

20mA

10µs/div

LOAD TRANSIENT

OUT

= 2.5V, C

OUT

= 1µF, 0 TO +20mA)

MAX873/75/76 toc29

OUT

AC-COUPLED 50mV/div

20mA

200µs/div

LOAD TRANSIENT

OUT

= 10V, C

OUT

= 1µF, 0 TO 20mA)

MAX873/75/76 toc30

OUT

AC-COUPLED 100mV/div

20mA

100µs/div

LOAD TRANSIENT

OUT

= 2.5V, C

OUT

= 0, 0 TO -2mA)

MAX873/75/76 toc31

OUT

AC-COUPLED 200mV/div

-2mA

40µs/div

LOAD TRANSIENT

OUT

= 10V, C

OUT

= 0, 0 TO -2mA)

MAX873/75/76 toc32

OUT

AC-COUPLED 20mV/div

-2mA

200µs/div

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VIN= +5V for V

OUT

= +2.5V, VIN= +15V for V

OUT

= +10V, I

OUT

= 0, TA= +25°C, unless otherwise noted.)

LOAD TRANSIENT

OUT

= 2.5V, C

OUT

= 1µF, 0 TO -2mA)

MAX873/75/76 toc33

OUT

AC-COUPLED 20mV/div

-2mA

400µs/div

LOAD TRANSIENT

OUT

= 10V, C

OUT

= 1µF, 0 TO -2mA)

MAX873/75/76 toc34

OUT

AC-COUPLED 5mV/div

-2mA

400µs/div

LINE TRANSIENT

OUT

= 2.5V)

MAX873/75/76 toc35

OUT

AC-COUPLED 200mV/div

5.5V

4.5V

10µs/div

OUT

= 0

LINE TRANSIENT

OUT

= 10V)

MAX873/75/76 toc36

1V/div

OUT

AC-COUPLED 200mV/div

15.5V

14.5V

2µs/div

TURN-ON TRANSIENT

OUT

= 2.5V, C

OUT

= 0)

MAX873/75/76 toc37

2V/div

OUT

1V/div

GND

10µs/div

OUT

= 0

TURN-ON TRANSIENT

OUT

= 2.5V, C

OUT

= 1µF)

MAX873/75/76 toc38

2V/div

OUT

1V/div

GND

40µs/div

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V

Precision Voltage References

_______________________________________________________________________________________ 9

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:

∆V

OUT

= 2 x (V

TRIM

- V

TRIM (open)

) x k

where:

TRIM

= 0V to V

OUT

TRIM

(open)

= V

OUT

(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 V

OUT

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.

Typical Operating Characteristics (continued)

(VIN= +5V for V

OUT

= +2.5V, VIN= +15V for V

OUT

= +10V, I

OUT

= 0, TA= +25°C, unless otherwise noted.)

TURN-ON TRANSIENT

OUT

= 10V, C

OUT

= 0)

MAX873/75/76 toc39

5V/div

OUT

5V/div

GND

100µs/div

TURN-ON TRANSIENT

OUT

= 10V, C

OUT

= 1µF)

MAX873/75/76 toc40

5V/div

OUT

5V/div

GND

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

4 GND Ground

5 TRIM

6 OUT Output Voltage

Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die temperature.

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.

7 N.C. No Connection. Not internally connected.

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

10 ______________________________________________________________________________________

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 T

= the die temperature,

n = the temperature multiplier,

= 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 T

= +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.

VatTT

mV K

TEMP J

( )

./=

≅ °

Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error

10,000

1000

100

TEMPERATURE

COEFFICIENT

(ppm/°C)

0.1

0.01 110

OPERATING TEMPERATURE RANGE (T

MAX

- T

) (°C)

MIN

8-BIT

10-BIT

12-BIT

14-BIT

16-BIT

18-BIT

20-BIT

100

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V

Precision Voltage References

______________________________________________________________________________________ 11

Temperature Coefficient vs. Operating

Temperature Range for a

1 LSB Maximum Error

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 (T

MAX

- T

MIN

) 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.

Figure 2. Applications Circuit Using the MAX5436 Potentiometer

Chip Information

TRANSISTOR COUNT: 429

PROCESS: BiCMOS

Pin Configuration

TOP VIEW

I.C.*

87I.C.*

+ 2V) TO 40V INPUT

( V

OUT

*OPTIONAL.

TEMP

MAX873 MAX875 MAX876

TRIM

GND

REFERENCE OUTPUT

MAX5436 50kΩ POTENTIOMETER

MAX873 MAX875

TEMP

*INTERNALLY CONNECTED. DO NOT CONNECT.

MAX876

N.C.IN

OUT

TRIMGND

MAX873/MAX875/MAX876

Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

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.

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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

Revision History

Pages changed at Rev 3: 1–12

TOP VIEW

FRONT VIEW

SIDE VIEW

INCHES

DIM

A1 B C e 0.050 BSC 1.27 BSC E H 0.2440.228 5.80 6.20

VARIATIONS:

D D

0∞-8∞

MAX

MIN

0.069

0.053A

0.010

0.004

0.014

0.019

0.007

0.010

0.150

0.157

0.016L

0.050

INCHES

MAX

MINDIM

0.189 0.197 AA5.004.80 8

0.337 0.344 AB8.758.55 14

0.3940.386D

PROPRIETARY INFORMATION

TITLE:

PACKAGE OUTLINE, .150" SOIC

MILLIMETERS

MAX

MIN

1.35

1.75

0.10

0.25

0.35

0.49

0.19

0.25

3.80 4.00

0.40 1.27

MILLIMETERS

MAX

MIN

9.80 10.00

21-0041

N MS012

REV.DOCUMENT CONTROL NO.APPROVAL

SOICN .EPS

MAXIM MAX873, MAX875, MAX876 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual