ADS7821 Datasheet, PDF (1/11 Pages) Burr-Brown (TI) – 16-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER

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ADS7821
ADS7821
ADS7821
16-Bit 10µs Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 100kHz min SAMPLING RATE
q 0 to +5V INPUT RANGE
q 86dB min SINAD WITH 20kHz INPUT
q DNL: 16-bits “No Missing Codes”
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 12-BIT ADS7820
q USES INTERNAL OR EXTERNAL
REFERENCE
q FULL PARALLEL DATA OUTPUT
q 100mW max POWER DISSIPATION
q 28-PIN 0.3" PLASTIC DIP AND SOIC
DESCRIPTION
The ADS7821 is a complete 16-bit sampling A/D
using state-of-the-art CMOS structures. It contains a
complete 16-bit, capacitor-based, SAR A/D with S/H,
reference, clock, interface for microprocessor use, and
three-state output drivers.
The ADS7821 is specified at a 100kHz sampling rate,
and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide a 0 to +5V input
range, with power dissipation under 100mW.
The 28-pin ADS7821 is available in a plastic 0.3" DIP
and in an SOIC, both fully specified for operation over
the –25°C to +85°C range.
Clock
Successive Approximation Register and Control Logic
R/C
CS
BYTE
BUSY
5kΩ
0 to +5V Input
6.66kΩ
20kΩ
CAP
REF
CDAC
Buffer
4kΩ
Internal
+2.5V Ref
Comparator
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data
Bus
SBAS048
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©_{1996 Burr-Brown Corporation}
PDS-₁1323A
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AD^PS^rin7^ted8ⁱⁿ2^U1^{.S.A. June, 1996}