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參數(shù)資料
| 型號： | AD7854SQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP28 |
| 封裝： | 0.600 INCH, CERDIP-28 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大小： | 264K |
| 代理商： | AD7854SQ |
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FUNCTIONAL BLOCK DIAGRAM
CALIBRATION
MEMORY
AND CONTROLLER
2.5V
REFERENCE
AV
DD
AGND
DV
DD
CLKIN
CONVST
BUSY
C
REF2
C
REF1
REF
IN
/
REF
OUT
AIN(–)
AIN(+)
DGND
DB11–DB0
WR
HBEN
RD
CS
PARALLEL INTERFACE/CONTROL REGISTER
AD7854/AD7854L
CHARGE
REDISTRIBUTION
DAC
T/H
COMP
SAR + ADC
CONTROL
BUF
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
3 V to 5 V Single Supply, 200 kSPS
12-Bit Sampling ADCs
AD7854/AD7854L*
FEATURES
Specified for V
DD
of 3 V to 5.5 V
Read-Only Operation
AD7854–200 kSPS; AD7854L–100 kSPS
System and Self-Calibration
Low Power
Normal Operation
AD7854: 15 mW (V
DD
= 3 V)
AD7854L: 5.5 mW (V
DD
= 3 V)
Automatic Power-Down After Conversion (25
AD7854: 1.3 mW 10 kSPS
AD7854L: 650 W 10 kSPS
Flexible Parallel Interface
12-Bit Parallel/8-Bit Parallel (AD7854)
28-Lead DIP, SOIC and SSOP Packages (AD7854)
W)
APPLICATIONS
Battery-Powered Systems (Personal Digital Assistants,
Medical Instruments, Mobile Communications)
Pen Computers
Instrumentation and Control Systems
High Speed Modems
PRODUCT HIGHLIGHTS
1. Operation with either 3 V or 5 V power supplies.
2. Flexible power management options including automatic
power-down after conversion. By using the power manage-
ment options a superior power performance at slower
throughput rates can be achieved:
AD7854: 1 mW typ @ 10 kSPS
AD7854L: 1 mW typ @ 20 kSPS
3. Operates with reference voltages from 1.2 V to AV
DD
.
4. Analog input ranges from 0 V to AV
DD
.
5. Self-calibration and system calibration.
6. Versatile parallel I/O port.
7. Lower power version AD7854L.
GENERAL DESCRIPTION
The AD7854/AD7854L is a high speed, low power, 12-bit ADC
that operates from a single 3 V or 5 V power supply, the
AD7854 being optimized for speed and the AD7854L for low
power. The ADC powers up with a set of default conditions at
which time it can be operated as a read-only ADC. The ADC
contains self-calibration and system calibration options to en-
sure accurate operation over time and temperature and has a
number of power-down options for low power applications.
The AD7854 is capable of 200 kHz throughput rate while the
AD7854L is capable of 100 kHz throughput rate. The input
track-and-hold acquires a signal in 500 ns and features a pseudo-
differential sampling scheme. The AD7854 and AD7854L input
voltage range is 0 to V
REF
(unipolar) and –V
REF
/2 to +V
REF
/2,
centered at V
REF
/2 (bipolar). The coding is straight binary in
unipolar mode and twos complement in bipolar mode. Input
signal range is to the supply and the part is capable of convert-
ing full-power signals to 100 kHz.
CMOS construction ensures low power dissipation of typically
5.4 mW for normal operation and 3.6
μ
W in power-down mode.
The part is available in 28-lead, 0.6 inch wide dual-in-line pack-
age (DIP), 28-lead small outline (SOIC) and 28-lead small
shrink outline (SSOP) packages.
*
Patent pending.
See Page 27 for data sheet index.
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., 2000
相關PDF資料 |
PDF描述 |
|---|---|
| AD7854L* | 3.3V/5V Low Power RS232 3-Driver/5-Receiver Transceiver; Package: SSOP; No of Pins: 28; Temperature Range: 0°C to +70°C |
| AD7854BR | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| AD7854AR | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| AD7854L | 12-Bit Sampling ADC(單電源,200kSPS 12位采樣A/D轉換器) |
| AD7854 | 12-Bit Sampling ADC(單電源,200kSPS 12位采樣A/D轉換器) |
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