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AD7891 Datasheet PDF

Part Series:AD7891 Series
Category:Analog to Digital
Description:Analogue to Digital Converter, Octal, 12Bit, 500KSPS, Single, 4.75V, 5.25V, MQFP
Document:AD7891APZ-1 Datasheet PDF (22 Pages)

AD7891 Datasheet PDF Analog to Digital

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ANALOG DEVICES AD7891BSZ-2 Analogue to Digital Converter, 12Bit, 500KSPS, Single, 5V, MQFP
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AD7891ASZ-2 - ADI Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Number of Pins
44 Pin
Supply Voltage (DC)
4.75V (min)
Case/Package
QFP-44
Supply Current
20.0 mA
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AD7891ASZ-2 - ADI Function Overview

Product Details
The AD7891 is an eight-channel 12-bit data acquisition system with a choice of either parallel or serial interface structure. The part contains an input multiplexer, an on-chip track/hold amplifier, a high speed 12-bit ADC, a +2.5 V reference and a high speed interface. The part operates from a single +5 V supply and accepts a variety of analog input ranges across two models, the AD7891-1 (±5 V and ±10 V) and the AD7891-2 (0 V to +2.5 V, 0 V to +5 V and ±2.5 V).
The AD7891 provides the option of either a parallel interface or serial interface structure determined by the MODE pin. The part has standard control inputs and fast data access times for both the serial and parallel interfaces which ensures easy interfacing to modern microprocessors, microcontrollers and digital signal processors.
In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the part is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio.
Power dissipation in normal mode is 90 mW typical while in the standby mode this is reduced to 75 µW typ. The part is available in a 44-pin plastic quad flat-pack (PQFP) and a 44- lead plastic leaded chip carrier (PLCC).
### Features and Benefits
Fast 12-Bit ADC with 1.6 µs Conversion Time
8 Single-Ended Analog Input Channels
Overvoltage Protection on Each Channel
Selection of Input Ranges:
±5 V, ±10 V for AD7891-1
0 to +2.5 V, 0 to +5 V, ±2.5 V for AD7891-2
Parallel and Serial Interface
On-Chip Track/Hold Amplifier
On-Chip Reference
Single-Supply, Low Power Operation (100 mW Max)
Power-Down Mode (75 µW Typ)
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