ADS7818E Datasheet, PDF (1/21 Pages) Texas Instruments – 12-Bit High Speed Low Power Sampling ANALOG-TO-DIGITAL CONVERTER

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ADS7818
ADS7818
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information, visit www.burr-brown.com
12-Bit High Speed Low Power Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 500kHz THROUGHPUT RATE
q 2.5V INTERNAL REFERENCE
q LOW POWER: 11mW
q SINGLE SUPPLY +5V OPERATION
q DIFFERENTIAL INPUT
q SERIAL INTERFACE
q GUARANTEED NO MISSING CODES
q MINI-DIP-8 AND MSOP-8
q UNIPOLAR INPUT RANGE
APPLICATIONS
q BATTERY OPERATED SYSTEMS
q DIGITAL SIGNAL PROCESSING
q HIGH SPEED DATA ACQUISITION
q WIRELESS COMMUNICATION SYSTEMS
DESCRIPTION
The ADS7818 is a 12-bit sampling analog-to-digital
converter (A/D) complete with sample/hold, internal
2.5V reference, and synchronous serial interface. Typi-
cal power dissipation is 11mW at a 500kHz through-
put rate. The device can be placed into a power down
mode which reduces dissipation to just 2.5mW. The
input range is zero to two times the reference voltage,
and the internal reference can be overdriven by an
external voltage.
Low power, small size, and high-speed make the
ADS7818 ideal for battery operated systems such as
wireless communication devices, portable multi-chan-
nel data loggers, and spectrum analyzers. The serial
interface also provides low-cost isolation for remote
data acquisition. The ADS7818 is available in a plas-
tic mini-DIP-8 or an MSOP-8 package and is guaran-
teed over the –40°C to +85°C temperature range.
SAR
CLK
CONV
SBAS078
+In
–In
S/H Amp
CDAC
Comparator
Serial
Interface
DATA
V_REF
Buffer
Internal
+2.5V Ref
10kΩ ±30%
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PDS-11408B
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ADPrSint7ed8in1U8.S.A. May, 2000