AD S
ADS7804
780
4
ADS
780
4
SBAS019A – JANUARY 1992 – REVISED MAY 2003
12-Bit 10
µ
s 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
CDAC
20kΩ
±10V Input
10kΩ
4kΩ
Comparator
CAP
Buffer
4kΩ
REF
Internal
+2.5V Ref
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data
Bus
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
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.
Copyright © 1992-2003, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
