AD7294 查看數據表（PDF） - Analog Devices

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AD7294

12-Bit, Multichannel, DAC/ADC Temperature Sensor and Current Sense for Monitor and Control Applications

Analog Devices 

AD7294

Preliminary Technical Data

ADC SPECIFICATIONS1

AVDD = DVDD 4.5 V to 5.5 V, AGND = DGND= 0 V, external 2.5 V reference. Temperature range for B version: −40°C to +105°C. All

specifications TMIN to TMAX, unless otherwise noted.

Parameter

Min

Typ

Max

Unit

ACCURACY

Resolution

12

Bits

Integral Nonlinearity (INL)

±0.5

±1

LSB

Differential Nonlinearity (DNL)

±1

LSB

Offset Error

Gain Error

Total Unadjusted Error (TUE)

Conversion Rate

Analog Input Range

0

Input Capacitance

30

DC Input Leakage Current

TEMPERATURE SENSOR

Accuracy

Accuracy

Resolution

11

Low Level Output Current Source

8

Medium Level Output Current

32

Source

High Level Output Current Source

128

CURRENT SENSE

Common-Mode Input Range

AVDD

Full-Scale Sense Voltage

200

RS(+) and RS(−) Input Bias Current

25

CMRR / PSRR

80

Maximum Series Resistance for

external diode

Gain

Accuracy

Offset

Bandwidth

300

Amplifier Equivalent RMS Noise

REFERENCE

Reference Output Voltage

2.49

Reference Input Voltage Range

0.1

DC Leakage Current

Input Capacitance

20

VREF Output Impedance

25

Reference Temperature Coefficient

±3

±2

TBD

3

VREF or 2 VREF

±1

±2

±2

48

10

±1

LSB

LSB

LSB

μS

V

pF

µA

°C

°C

Bits

µA

µA

µA

V

mV

µA

dB

kΩ

% FS

kHz

0.8

LSB

2.51

V

2.5

V

±30

µA

pF

Ω

25

ppm/°C

Test Conditions / Comments

Differential Mode

Single Ended or Pseudo-Differential

Mode

Differential Mode

Single Ended or Pseudo-Differential

Mode

External temperature sensors × 2

TA = −10°C to +90°C

Internal temperature sensor

TA = −10°C to +90°C

0.25 °C LSB size

±200 mV Full Scale Voltage

Pin connected to power supply

TA = TMIN to TMAX

60 µV RMS referred to input

10 ppm/°C typ

Rev. PrB | Page 4 of 45

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