ADS7809 Datasheet, PDF (1/10 Pages) Burr-Brown (TI) – 16-Bit 10ms Serial CMOS Sampling ANALOG-to-DIGITAL CONVERTER

®
ADS7809
ADS7809
ADS7809
DEMO BOARD
AVAILABLE
16-Bit 10µs Serial CMOS Sampling
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 100kHz SAMPLING RATE
q 86dB SINAD WITH 20kHz INPUT
q ±2 LSB INL
q DNL: 16 BITS “No Missing Codes”
q SIX SPECIFIED INPUT RANGES
q SERIAL OUTPUT
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 12-BIT ADS7808
q USES INTERNAL OR EXTERNAL
REFERENCE
q 100mW MAX POWER DISSIPATION
q 20-PIN 0.3" PLASTIC DIP AND SOIC
q SIMPLE DSP INTERFACE
DESCRIPTION
The ADS7809 is a complete 16-bit sampling analog-
to-digital using state-of-the-art CMOS structures. It
contains a 16-bit capacitor-based SAR A/D with S/H,
reference, clock, and a serial data interface. Data can
be output using the internal clock, or can be synchro-
nized to an external data clock. The ADS7809 also
provides an output synchronization pulse for ease of
use with standard DSP processors.
The ADS7809 is specified at a 100kHz sampling rate,
and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide various input ranges
including ±10V and 0V to 5V, while an innovative
design operates from a single +5V supply, with power
dissipation under 100mW.
The 20-pin ADS7809 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.
R1_IN
R2_IN
R3_IN
CAP
20kΩ
10kΩ
20kΩ
5kΩ
REF
Power
R/C
CS
Down
Successive Approximation Register and Control Logic
CDAC
Buffer
4kΩ
Internal
+2.5V Ref
Comparator
Clock
Serial
Data
Out
BUSY
Data Clock
Serial Data
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©_{1992 Burr-Brown Corporation}
PDS-1154D
Printed in U.S.A., November, 1996