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參數資料
| 型號： | AD7896SQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 2.7 V to 5.5 V, 12-Bit, 8 us ADC in 8-Pin SO/DIP |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP8 |
| 封裝： | 0.300 INCH, HERMETIC SEALED, CERDIP-8 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 367K |
| 代理商： | AD7896SQ |
REV. B
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.
a
AD7896*
2.7 V to 5.5 V, 12-Bit, 8
m
s
ADC in 8-Pin SO/DIP
GENERAL DESCRIPTION
The AD7896 is a fast, 12-bit ADC which operates from a single
+2.7 V to 5.5 V supply and is housed in a small 8-pin mini-DIP
and 8-pin SOIC. The part contains an 8
μ
s successive approxi-
mation A/D converter, an on-chip track/hold amplifier, an on-
chip clock and a high speed serial interface.
Output data from the AD7896 is provided via a high speed,
serial interface port. This two-wire serial interface has a serial
clock input and a serial data output with the external serial clock
accessing the serial data from the part.
In addition to the traditional dc accuracy specifications such as
linearity, full-scale and offset errors, the AD7896 is also speci-
fied for dynamic performance parameters including harmonic
distortion and signal-to-noise ratio.
The part accepts an analog input range of 0 V to V
DD
and oper-
ates from a single +2.7 V to +5.5 V supply consuming only
9 mW typical. The V
DD
input is also used as the reference for
the part so that no external reference is required.
The AD7896 features a high sampling rate mode and, for low
power applications, a proprietary automatic power down mode
where the part automatically goes into power down once con-
version is complete and “wakes up” before the next conversion
cycle.
The part is available in a small, 8-pin, 0.3'' wide, plastic or her-
metic dual-in-line package (mini-DIP) and in an 8-pin, small
outline IC (SOIC).
*
Patent pending.
PRODUCT HIGHLIGHTS
1. Complete, 12-bit ADC in 8-Pin Package
The AD7896 contains an 8
μ
s ADC, a track/hold amplifier,
control logic and a high speed serial interface, all in an 8-pin
DIP. The V
DD
input is used as the reference for the part so
no external reference is needed. This offers considerable
space saving over alternative solutions.
2. Low Power, Single Supply Operation
The AD7896 operates from a single +2.7 V to 5.5 V supply
and consumes only 9 mW typical. The automatic power
down mode, where the part goes into power down once con-
version is complete and “wakes up” before the next conver-
sion cycle, makes the AD7896 ideal for battery powered or
portable applications.
3. High Speed Serial Interface
The part provides high speed serial data and serial clock lines
allowing for an easy, two-wire serial interface arrangement.
FEATURES
100 kHz Throughput Rate
Fast 12-Bit Sampling ADC with 8
m
s Conversion Time
8-Pin Mini-DIP and SOIC
Single +2.7 V to +5.5 V Supply Operation
High Speed, Easy-to-Use, Serial Interface
On-Chip Track/Hold Amplifier
Analog Input Range is 0 V to Supply
High Input Impedance
Low Power: 9 mW typ
FUNCTIONAL BLOCK DIAGRAM
CLOCK
12-BIT
ADC
OUTPUT
REGISTER
TRACK/HOLD
AD7896
V
IN
CONVST
V
DD
AGND
DGND
BUSY
SCLK
SDATA
Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
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