ad7883br Analog Devices, Inc., ad7883br Datasheet

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ad7883br

Manufacturer Part Number
ad7883br
Description
Lc2mos 12-bit, 3.3 V Sampling Adc
Manufacturer
Analog Devices, Inc.
Datasheet

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GENERAL DESCRIPTION
The AD7883 is a high speed, low power, 12-bit A/D converter
which operates from a single +3 V to +3.6 V supply. It consists
of a 5 s track/hold amplifier, a 15 s successive-approximation
ADC, versatile interface logic and a multiple-input-range circuit.
The part also includes a power save feature.
Fast bus access times and standard control inputs ensure easy
interfacing to modern microprocessors and digital signal
processors.
The AD7883 features a total throughput time of 20 s and can
convert full power signals up to 25 kHz with a sampling fre-
quency of 50 kHz.
In addition to the traditional dc accuracy specifications such as
linearity, full-scale and offset errors, the AD7883 is also fully
specified for dynamic performance parameters including har-
monic distortion and signal-to-noise ratio.
The AD7883 is fabricated in Analog Devices’ Linear Com-
patible CMOS (LC
that combines precision bipolar circuits with low power CMOS
logic. The part is available in a 24-pin, 0.3 inch-wide, plastic
dual-in-line package (DIP) as well as a small 24-lead SOIC
package.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Battery-Compatible Supply Voltage: Guaranteed Specs
12-Bit Monolithic A/D Converter
50 kHz Throughput Rate
Low Power
70 dB SNR
Small 24-Lead SOIC and 0.3" DIP Packages
APPLICATIONS
Battery Powered Portable Systems
Laptop Computers
for V
15 s Conversion Time
5 s On-Chip Track/Hold Amplifier
Power Save Mode: 1 mW typ
Normal Operation: 8 mW typ
DD
of 3 V to 3.6 V
2
MOS) process, a mixed technology process
PRODUCT HIGHLIGHTS
1. 3 V Operation
2. Fast Conversion Time
3. Low Power Consumption
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
The AD7883 is guaranteed and tested with a supply voltage
of 3 V to 3.6 V. This makes it ideal for battery-powered ap-
plications where 12-bit A/D conversion is required.
15 s conversion time and 5 s acquisition time allow for
large input signal bandwidth. This performance is ideally
suited for applications in areas such as telecommunications,
audio, sonar and radar signal processing.
1 mW power consumption in the power-down mode makes
the part ideally suited for portable, hand held, battery pow-
ered applications.
CONVST
CLKIN
AGND
BUSY
V
V
V
REF
INA
RD
INB
CS
12-Bit, 3.3 V Sampling ADC
FUNCTIONAL BLOCK DIAGRAM
CONTROL
LOGIC
12-BIT DAC
DB11
COMPARATOR
BUFFERS
THREE
STATE
SAMPLING
DB0
+
COUNTER
SAR +
LOW POWER
AD7883
AD7883
CONTROL
CIRCUIT
DGND
V
DD
Fax: 617/326-8703
LC
2
MOS
MODE

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