ADS7835E Datasheet, PDF (1/20 Pages) Texas Instruments – 12-Bit, High-Speed, Low Power Sampling ANALOG-TO-DIGITAL CONVERTER

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ADS7835
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12-Bit, High-Speed, Low Power Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 500kHz THROUGHPUT RATE
q 2.5V INTERNAL REFERENCE
q LOW POWER: 17.5mW
q SINGLE SUPPLY +5V OPERATION
q SERIAL INTERFACE
q GUARANTEED NO MISSING CODES
q MSOP-8
q ±V_REF INPUT RANGE
APPLICATIONS
q BATTERY-OPERATED SYSTEMS
q DIGITAL SIGNAL PROCESSING
q HIGH-SPEED DATA ACQUISITION
q WIRELESS COMMUNICATION SYSTEMS
DESCRIPTION
The ADS7835 is a 12-bit, sampling analog-to-digi-
tal converter (A/D) complete with sample-and-hold
(S/H), internal 2.5V reference, and synchronous
serial interface. Typical power dissipation is 17.5mW
at a 500kHz throughput rate. The device can be
placed into a power-down mode which reduces dis-
sipation to just 2.5mW. The input range is –V_REF to
+V_REF, and the internal reference can be overdriven
by an external voltage.
Low power, small size, and high speed make the
ADS7835 ideal for battery-operated systems such
as wireless communication devices, portable multi-
channel data loggers, and spectrum analyzers. The
serial interface also provides low cost isolation for
remote data acquisition. The ADS7835 is avail-
able in an MSOP-8 package and is guaranteed over
the –40°C to +85°C temperature range.
SAR
CLK
CONV
SBAS102
±2.5V
Input
2kΩ
2kΩ
S/H Amp
CDAC
Comparator
Serial
Interface
DATA
Buffer
Internal
+2.5V Ref
V_REF
10kΩ ±30%
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