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參數(shù)資料
| 型號(hào)： | EVAL-AD7888CB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | +2.7 V to +5.25 V, Micropower, 8-Channel, 125 kSPS, 12-Bit ADC in 16-Lead TSSOP |
| 中文描述： | 2.7 V至5.25 V，微功耗，8通道，125 kSPS的，12位ADC的16引腳TSSOP |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大小： | 164K |
| 代理商： | EVAL-AD7888CB |
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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
AD7888
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1999
+2.7 V to +5.25 V, Micropower, 8-Channel,
125 kSPS, 12-Bit ADC in 16-Lead TSSOP
FUNCTIONAL BLOCK DIAGRAM
SAR + ADC
CONTROL LOGIC
AGND
REF IN/REF OUT
AIN8
AIN1
SCLK
DOUT
DIN
AGND
AD7888
V
DD
CS
T/H
I/P
MUX
BUF
2.5V
REF
CHARGE
REDISTRIBUTION
DAC
SPORT
COMP
FEATURES
Specified for V
DD
of +2.7 V to +5.25 V
Flexible Power/Throughput Rate Management
Shutdown Mode: 1
m
A Max
Eight Single-Ended Inputs
Serial Interface: SPI/QSPI/MICROWIRE/DSP
Compatible
16-Lead Narrow SOIC and TSSOP Packages
APPLICATIONS
Battery-Powered Systems (Personal Digital Assistants,
Medical Instruments, Mobile Communications)
Instrumentation and Control Systems
High Speed Modems
GENERAL DESCRIPTION
The AD7888 is a high speed, low power, 12-bit ADC that oper-
ates from a single +2.7 V to +5.25 V power supply. The AD7888
is capable of a 125 kSPS throughput rate. The input track-and-
hold acquires a signal in 500 ns and features a single-ended
sampling scheme. The AD7888 contains eight single-ended
analog inputs, AIN1 through AIN8. The analog input on each
of these channels is from 0 to V
REF
. The part is capable of con-
verting full power signals up to 2.5 MHz.
The AD7888 features an on-chip 2.5 V reference that can be
used as the reference source for the A/D converter. The REF
IN/REF OUT pin allows the user access to this reference. Alter-
natively, this pin can be overdriven to provide an external refer-
ence voltage for the AD7888. The voltage range for this external
reference is from 1.2 V to V
DD
.
CMOS construction ensures low power dissipation of typically
2 mW for normal operation and 3
μ
W in power-down mode.
The part is available in a 16-lead narrow body small outline
(SOIC) and a 16-lead thin shrink small outline (TSSOP) package.
PRODUCT HIGHLIGHTS
1. Smallest 12-bit 8-channel ADC; 16-lead TSSOP is the same
area as an 8-lead SOIC and less than half the height.
2. Lowest Power 12-bit 8-channel ADC.
3. Flexible power management options including automatic
power-down after conversion.
4. Analog input range from 0 V to V
REF
(V
DD
).
5. Versatile serial I/O port (SPI/QSPI/MICROWIRE/DSP
Compatible).
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corporation.
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