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MFG:ADI  D/C:09  

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Part Number: AD7993

 

MFG: ADI

 

D/C: 09

Description: The AD7994/AD7993 are 4 channel, 12-/10-bit, high speed, low power, successive-approximation ADCs resp...


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AD7993 General Description


The AD7994/AD7993 are 4 channel, 12-/10-bit, high speed, low power, successive-approximation ADCs respectively. They operate from a single 2.7 V to 5.5 V power supply and feature a conversion time of 2 µs. The parts contain a four channel multiplexer and track/hold amplifier which can handle input frequencies in excess of TBD kHz. The AD7994/AD7993 provide a two-wire serial interface which is compatible with I2C interfaces. The parts come in two versions, AD7994-0/AD7993-0 to AD7994-1/ AD7993-1. Each version allows for a minimum of two different I2C addresses. The I2C interface on the AD7994- 0/AD7993-0 supports Standard and Fast I2C Interface Modes.

The I2C interface on the AD7994-1/AD7993-1 supports Standard, Fast and two High-Speed I2C Interface Modes. The AD7994/AD7993 normally remain in a shutdown state while not converting, powering up only for conversions. The conversion process can be controlled using the CONVST pin, an Automatic Conversion Cycle selected through software control, or a mode where conversions occur across Write operations.

There are no pipeline delays associated with the part. The reference for the part is applied externally to the REFIN pin and can be in the range of 1.2V to VDD. This allows the widest dynamic input range to the ADC.

AD7993 Maximum Ratings

VDD to GND ...............................................................................0.3 V to 7 V
Analog Input Voltage to GND ......................................0.3 V to VDD + 0.3 V
Reference Input Voltage to GND ...................................-0.3 V to VDD + 0.3 V
Digital Input Voltage to GND.................................................... 0.3 V to 7 V
Digital Output Voltage to GND ....................................0.3 V to VDD + 0.3 V
Input Current to Any Pin Except Supplies2....................................... ±10 mA
Operating Temperature Range
Commercial (B Version) ....................................................40°C to +85°C
Storage Temperature Range......................................... 65°C to +150°C
Junction Temperature..................................................................... +150°C
16-ld TSSOP Package
JA Thermal Impedance .............................................. 150.4°C/W (TSSOP)
JC Thermal Impedance .................................................27.6°C/W (TSSOP)
Lead Temperature, Soldering
Vapor Phase (60 secs)................................................................... +215°C
Infared (15 secs)............................................................................ +220°C
NOTES
1Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
2Transient currents of up to 100 mA will not cause SCR latch up.

AD7993 Features

·12-Bit ADC with Fast Conversion Time: 2 µs
·Four Single-Ended Analog Input Channels
·Specified for VDD of 2.7 V to 5.5 V
·Low Power Consumption
·Fast Throughput Rate:- 188 KSPS
·Sequencer Operation
·Automatic Cycle Mode
·I2CR Compatible Serial Interface
·I2CR Interface supports:
·Standard, Fast, and High-Speed Modes
·Out of Range Indicator/Alert Function
·Pin-Selectable Addressing via AS
·Two Versions Allow Five I2C Addresses
Shutdown Mode: 1µA max
16-Lead TSSOP Package

AD7993 datasheet

AD7993
PDF/DataSheet Download

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