AD7294 Просмотр технического описания (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 

Preliminary Technical Data

AD7294

Pin No.

36

37

38

39

40, 41

43 to 46

47

48

55, 56

Mnemonic

OPGND

VDRIVE

DGND

DVDD

ISENSE1 Overrange,

ISENSE2 Overrange

VIN3 to VIN0

Description

and 400 kHz operating modes.

Dedicated Ground Pin for I2C Interface.

This pin should be connected to the supply that the I2C bus is pulled up to. This is not a supply

pin in I2C mode—it just sets up the input threshold levels.

Ground for All Digital Circuitry.

Logic Power Supply. Guaranteed operating range is 2.7 V to 5.5 V. It is recommended that these

pins be decoupled with 0.1 µF ceramic and 10 µF tantalum capacitors to DGND.

Outputs from Fault Comparators Connected to High-Side Current Sense Amplifiers.

Single-Ended Analog Inputs with Input Range from 0 V to REFIN/REFOUT ADC.

REFOUT/REFIN ADC

DCAP

VPP1, VPP2

The AD7294 contains REFOUT/REFIN ADC pin for the ADC. When the internal reference is

selected, this pin is the reference output. If the application requires an external reference, it can

be applied to this pin, and the internal reference can be disabled via the control register. The

default for this pin is a reference input.

External Decoupling Capacitor Input for Internal Temperature Sensor. A 0.1 μF capacitor to

AGND should be connected to this pin.

Analog Supply Pins. Power supply pins for the high-side current sense amplifiers. Operating

range is from AVDD to +60 V.

Rev. PrB | Page 9 of 45

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