®
ADS
¤
ADS7862
786
2
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
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4 INPUT CHANNELS
FULLY DIFFERENTIAL INPUTS
2
µ
s TOTAL THROUGHPUT PER CHANNEL
GUARANTEED NO MISSING CODES
PARALLEL INTERFACE
1MHz EFFECTIVE SAMPLING RATE
LOW POWER: 40mW
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.
APPLICATIONS
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MOTOR CONTROL
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MULTI-AXIS POSITIONING SYSTEMS
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3-PHASE POWER CONTROL
CH A0+
CH A0–
S/H
Amp
CDAC
CH A1+
CH A1–
MUX
Conversion
and
Control
SAR
COMP
Interface
A0
CLOCK
CS
RD
BUSY
CONVST
Internal
2.5V
Reference
Output
Registers
Data Output
12
REF
IN
REF
OUT
CH B0+
CH B0–
S/H
Amp
COMP
CDAC
CH B1+
CH B1–
MUX
SAR
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
© 1998 Burr-Brown Corporation
PDS-1475B
1
Printed in U.S.A.
ADS7862
May, 2000
BURR-BROWN [ BURR-BROWN CORPORATION ]
