ADT7516 datasheet(4/44 Pages) AD

4 / 44 page

ADT7516/ADT7517/ADT7519

Rev. B | Page 4 of 44

Parameter1

Min

Typ

Max

Unit

Conditions/Comments

External Temperature Sensor

External transistor = 2N3906

Accuracy @ VDD = 3.3 V ±10%

±1.5

°C

TA = 85°C

±3

°C

TA = 0°C to +85°C

±5

°C

TA = −40°C to +120°C

Accuracy @ VDD = 5 V ±5%

±2

±3

°C

TA = 0°C to +85°C

±3

±5

°C

TA = −40°C to +120°C

Resolution

Bits

Equivalent to 0.25°C

Output Source Current

180

μA

High level

μA

Low level

Thermal Voltage Output

8-Bit DAC Output

Resolution

°C

Scale Factor

8.97

mV/°C

0 V to VREF output, TA = −40°C to +120°C

17.58

mV/°C

0 V to 2 VREF output, TA = −40°C to +120°C

10-Bit DAC Output

Resolution

0.25

°C

Scale Factor

2.2

mV/°C

0 V to VREF output, TA = −40°C to +120°C

4.39

mV/°C

0 V to 2 VREF output, TA = −40°C to +120°C

CONVERSION TIMES

Single channel mode

Slow ADC

VDD/AIN

11.4

Averaging (16 samples) on

712

μs

Averaging off

Internal Temperature

11.4

Averaging (16 samples) on

712

μs

Averaging off

External Temperature

24.22

Averaging (16 samples) on

1.51

Averaging off

Fast ADC

VDD/AIN

712

μs

Averaging (16 samples) on

44.5

μs

Averaging off

Internal Temperature

2.14

Averaging (16 samples) on

134

μs

Averaging off

External Temperature

14.25

Averaging (16 samples) on

890

μs

Averaging off

ROUND ROBIN UPDATE RATE5

Time to complete one measurement cycle

through all channels

Slow ADC @ 25°C

Averaging On

79.8

AIN1 and AIN2 are selected on Pin 7 and Pin 8

Averaging Off

4.99

AIN1 and AIN2 are selected on Pin 7 and Pin 8

Averaging On

94.76

D+ and D– are selected on Pin 7 and Pin 8

Averaging Off

9.26

D+ and D– are selected on Pin 7 and Pin 8

Fast ADC @ 25°C

Averaging On

6.41

AIN1 and AIN2 are selected on Pin 7 and Pin 8

Averaging Off

400.84

μs

AIN1 and AIN2 are selected on Pin 7 and Pin 8

Averaging On

21.77

D+ and D– are selected on Pin 7 and Pin 8

Averaging Off

3.07

D+ and D– are selected on Pin 7 and Pin 8

DAC EXTERNAL REFERENCE INPUT4

VREF Input Range

VDD

Buffered reference

VREF Input Impedance

>10

MΩ

Buffered reference and power-down mode

Reference Feedthrough

–90

Frequency = 10 kHz

Channel-to-Channel Isolation

–75

Frequency = 10 kHz

ADT7516 Datasheet(PDF) 4 Page - Analog Devices

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