ADS7820 Datasheet, PDF (1/11 Pages) Burr-Brown (TI) – 12-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER

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ADS7820
ADS7820
ADS7820
12-Bit 10µs Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 100kHz min SAMPLING RATE
q 0 to +5V INPUT RANGE
q 72dB min SINAD WITH 45kHz INPUT
q ±1/2 LSB max INL AND DNL
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 16-BIT ADS7821
q USES INTERNAL OR EXTERNAL
REFERENCE
q COMPLETE WITH S/H, REF, CLOCK, ETC.
q FULL PARALLEL DATA OUTPUT
q 100mW max POWER DISSIPATION
q 28-PIN 0.3" PLASTIC DIP AND SOIC
DESCRIPTION
The ADS7820 is a complete 12-bit sampling A/D
using state-of-the-art CMOS structures. It contains a
complete 12-bit, capacitor-based SAR A/D with S/H,
reference, clock, interface for microprocessor use, and
three-state output drivers.
The ADS7820 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 ADS7820 is available in a plastic 0.3" DIP
and in an SOIC, both fully specified for operation over
the industrial –40°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
SBAS047
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Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1996 Burr-Brown Corporation}
PDS1-1322
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AD^PrS^int7^ed8ⁱⁿ2^U0^{.S.A. June, 1996}