General Description

The MAX6143 is a low-noise, high-precision voltage ref-

erence. The device features 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 ±0.06%

initial accuracy. The MAX6143 provides a TEMP output

where the output voltage is proportional to die tempera-

ture, making the device suitable for a wide variety of

temperature-sensing applications. The device also pro-

vides a TRIM input, allowing fine trimming of the output

voltage with a resistive-divider network. Low tempera-

ture drift and low noise make the MAX6143 ideal for use

with high-resolution A/D or D/A converters.

The MAX6143 provides accurate preset +2.5V, +3.3V,

+4.096V, +5.0V, and +10V reference voltages and

accepts input voltages up to +40V. The device draws

340µA of supply current and sources 30mA or sinks 2mA

of load current. The active-low shutdown feature (SHDN)

reduces supply current to 0.01µA. The MAX6143 uses

bandgap technology for low-noise performance and

excellent accuracy. The MAX6143 does not require an

output bypass capacitor for stability, and is stable with

capacitive loads up to 100µF. Eliminating the output

bypass capacitor saves valuable board area in space-

critical applications.

The MAX6143 is available in an 8-pin SO package and

operates over the automotive (-40°C to +125°C) tem-

perature range.

Applications

A/D Converters

Voltage Regulators

D/A Converters

Threshold Detectors

Digital Voltmeters

Features

♦ Excellent Temperature Stability: 3ppm/°C (max)

♦ Tight Initial Accuracy: 0.05% (max)

♦ Sources up to 30mA Output Current

♦ Low Supply Current: 450µA (max at +25°C)

♦ Low 0.01µA Shutdown Current

♦ Linear Temperature Transducer Voltage Output

♦ +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output

Voltages

♦ Wide Operating Temperature Range: -40°C to

+125°C

♦ No External Capacitors Required for Stability

High-Precision Voltage Reference with

Temperature Sensor

________________________________________________________________ Maxim Integrated Products

1

19-3168; Rev 1; 4/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Pin Configuration appears at end of data sheet.

Ordering Information/Selector Guide

PART

TEMP RANGE

PIN-

PACKAGE

OUTPUT

VOLTAGE (V)

TEMPERATURE COEFFICIENT

(ppm/

°C) 40°C TO +125°C

INITIAL

ACCURACY (%)

MAX6143AASA25

-40

°C to +125°C

8 SO

2.500

3

0.06

MAX6143BASA25

-40

°C to +125°C

8 SO

2.500

10

0.10

MAX6143AASA33

-40

°C to +125°C

8 SO

3.300

3

0.06

MAX6143BASA33

-40

°C to +125°C

8 SO

3.300

10

0.10

MAX6143AASA41

-40

°C to +125°C

8 SO

4.096

3

0.06

MAX6143BASA41

-40

°C to +125°C

8 SO

4.096

10

0.10

MAX6143AASA50

-40

°C to +125°C

8 SO

5.000

3

0.06

MAX6143BASA50

-40

°C to +125°C

8 SO

5.000

10

0.10

MAX6143AASA10

-40

°C to +125°C

8 SO

10.000

3

0.05

MAX6143BASA10

-40

°C to +125°C

8 SO

10.000

10

0.10

IN

OUT

GND

*OPTIONAL.

*

*

*

REFERENCE

OUTPUT

SHDN

TRIM

TEMP

MAX6143

Typical Operating Circuit