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MAX6143BASA10

High-Precision Voltage Reference with Temperature Sensor

Unspecified 

High-Precision Voltage Reference with

Temperature Sensor

Temp Output

The MAX6143 provides a temperature output propor-

tional 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 converse-

ly, the TEMP output. The TEMP equation assumes the

output is not loaded. If device power dissipation is neg-

ligible, 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 MAX6143 does not require an output capacitor for

stability and is stable with capacitive loads up to 100µF.

In applications where the load or the supply can experi-

ence 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 device as possible for best performance.

Supply Current

The MAX6143 consumes 340µA of quiescent supply

current. This improved efficiency reduces power dissi-

pation and extends battery life.

Shutdown

The active-low shutdown feature reduces supply cur-

rent to 0.01µA (typ), further extending battery life.

Connect SHDN to GND to activate shutdown. Connect

SHDN to IN for normal operation.

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 ther-

mal hysteresis value is 120ppm.

Turn-On Time

The MAX6143 typically turns on and settles 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 at a 1µF load.

Short-Circuited Outputs

The MAX6143 features a short-circuit-protected output.

Internal circuitry limits the output current to 60mA when

short circuiting the output to ground. The output cur-

rent is limited to 3mA when short circuiting the output

to the input.

10,000

1000

100

TEMPERATURE

COEFFICIENT

10

(ppm/°C)

1

0.1

0.01

1

10

OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)

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

8-BIT

10-BIT

12-BIT

14-BIT

16-BIT

18-BIT

20-BIT

100

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