(AD7656 - AD7658) Bipolar 12/14/16-Bit ADC
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Preliminary Technical Data
FEATURES
6 Independent ADCs True Bipolar Analog Inputs Pin/Software Sele...
Description
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Preliminary Technical Data
FEATURES
6 Independent ADCs True Bipolar Analog Inputs Pin/Software Selectable Ranges:- ±10V, ±5V Fast throughput rate: 250 kSPS Specified for VCC of 4.5 V to 5.5 V Low power 160mW at 250 kSPS with 5 V supplies Wide input bandwidth: 85 dB SNR at 50 kHz input frequency On-chip Reference and Reference Buffers Parallel and Serial Interface High speed serial interface SPI/QSPI/µWire/DSP compatible Standby mode: 5 µA max iCMOSTM Process Technology 64 LQFP package
250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC AD7658/AD7657/AD7656*
FUNCTIONAL BLOCK DIAGRAM
VDD CONVSTA CONVSTB CONVSTC AVCC DVCC
CLK OSC REF BUF
+5 CONTROL LOGIC SER/PAR VDRIVE STBY OUTPUT DRIVERS DOUTA
V1
T/H
16-BIT SAR
SCLK V2 T/H BUF V3 T/H 16-BIT SAR 16-BIT SAR OUTPUT DRIVERS OUTPUT DRIVERS DOUTB
DOUTC
V4
T/H BUF
16-BIT SAR OUTPUT DRIVERS
DATA/ CONTROL LINES 4, 94
V5
T/H
16-BIT SAR
V6
T/H
16-BIT SAR
AD7656
APPLICATIONS
Power Line Monitoring systems Instrumentation and control systems Multi-axis positioning systems
VSS
AGND
DGND
Figure 1.
GENERAL DESCRIPTION
The AD7658/AD7657/AD7656 contain six 12/14/16-bit, fast, low power, successive approximation ADCs all in the one package. The AD7658/AD7657/AD7656 core operates from a single 4.5 V to 5.5 V power supply and features throughput rates up to 250 kSPS. The parts contain low noise, wide bandwidth track-andhold amplifiers that can handle input frequencies up to 8 MHz. The con...
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