ADS7804 Datasheet, PDF (1/19 Pages) Burr-Brown (TI) – 12-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER

ADS7804
ADS7804
ADS7804
SBAS019A – JANUARY 1992 – REVISED MAY 2003
12-Bit 10µs Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 100kHz min SAMPLING RATE
q STANDARD ±10V INPUT RANGE
q 72dB min SINAD WITH 45kHz INPUT
q ±0.45 LSB max INL
q DNL: 12 Bits “No Missing Codes”
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 16-BIT ADS7805
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 SO PACKAGES
DESCRIPTION
The ADS7804 is a complete 12-bit sampling analog-to-digital
(A/D) converter using state-of-the-art CMOS structures. It
contains a complete 12-bit, capacitor-based, SAR A/D con-
verter with S/H, reference, clock, interface for microproces-
sor use, and three-state output drivers.
The ADS7804 is specified at a 100kHz sampling rate, and
guaranteed over the full temperature range. Laser-trimmed
scaling resistors provide an industry-
standard ±10V input range, while the innovative design
allows operation from a single +5V supply, with power
dissipation under 100mW.
The 28-pin ADS7804 is available in plastic 0.3" DIP and SO
packages, both fully specified for operation over the indus-
trial –40°C to +85°C range.
Clock
Successive Approximation Register and Control Logic
R/C
CS
BYTE
BUSY
±10V Input
20kΩ
10kΩ 4kΩ
CAP
REF
CDAC
Buffer
4kΩ
Internal
+2.5V Ref
Comparator
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data
Bus
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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