ADS7862 Datasheet, PDF (1/13 Pages) Burr-Brown (TI) – Dual 500kHz, 12-Bit, 2 2 Channel Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

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ADS7862 ¤
ADS7862
For most current data sheet and other product
information, visit www.burr-brown.com
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 simulta-
neous signal acquisition. Inputs to the sample-and-hold
amplifiers are fully differential and are maintained dif-
ferential to the input of the A/D converter. This provides
excellent common-mode rejection of 80dB at 50kHz
which is important in high noise environments.
The ADS7862 offers parallel interface and control in-
puts 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 full 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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© 1998 Burr-Brown Corporation
PDS-₁1475B
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