ADS7862_14 Datasheet, PDF (1/21 Pages) Texas Instruments – Dual 500kHz, 12-Bit, 2 + 2 Channel Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

ADS7862 ®
ADS7862
SBAS101B – JANUARY 1998 – REVISED AUGUST 2005
Dual 500kHz, 12-Bit, 2 + 2 Channel
Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 4 INPUT CHANNELS
q FULLY DIFFERENTIAL INPUTS
q 2µs TOTAL THROUGHPUT PER CHANNEL
q GUARANTEED NO MISSING CODES
q PARALLEL INTERFACE
q 1MHz EFFECTIVE SAMPLING RATE
q LOW POWER: 40mW
APPLICATIONS
q MOTOR CONTROL
q MULTI-AXIS POSITIONING SYSTEMS
q 3-PHASE POWER CONTROL
DESCRIPTION
The ADS7862 is a dual 12-bit, 500kHz analog-to-digital
converter (A/D) with 4 fully differential input channels grouped
into two pairs for high speed simultaneous signal acquisition.
Inputs to the sample-and-hold amplifiers are fully differential
and are maintained differential to the input of the A/D con-
verter. This provides excellent common-mode rejection of
80dB at 50kHz, which is important in high noise environ-
ments.
The ADS7862 offers parallel interface and control inputs to
minimize software overhead. The output data for each channel
is available as a 12-bit word. The ADS7862 is offered in an
TQFP-32 package and is fully specified over the –40°C to
+85°C operating range.
CH A0+
CH A0–
CH A1+
CH A1–
REF_IN
REF_OUT
CH B0+
CH B0–
MUX
CH B1+
CH B1–
MUX
S/H
Amp
CDAC
SAR
COMP
Internal
2.5V
Reference
S/H
Amp
CDAC
COMP
SAR
Interface
Conversion
and
Control
A0
CLOCK
CS
RD
BUSY
CONVST
Output
Registers
Data Output
12
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PRODUCTION DATA information is current as of publication date.
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testing of all parameters.
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