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參數資料
| 型號： | AD7856ARZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT 8CHAN 5V 24SOIC |
| 標準包裝： | 31 |
| 位數： | 14 |
| 采樣率（每秒）： | 285k |
| 數據接口： | 8051，QSPI?，串行，SPI? µP |
| 轉換器數目： | 2 |
| 功率耗散（最大）： | 89.25mW |
| 電壓電源： | 模擬和數字 |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 24-SOIC W |
| 包裝： | 管件 |
| 輸入數目和類型： | 8 個單端，單極；4 個偽差分，單極 |
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REV. A
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
AD7856
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., 1998
5 V Single Supply, 8-Channel
14-Bit 285 kSPS Sampling ADC
FUNCTIONAL BLOCK DIAGRAM
4.096V
REFERENCE
AVDD
AGND
DVDD
DGND
CLKIN
CONVST
BUSY
SLEEP
CAL
CREF2
CREF1
REFIN/REFOUT
AIN8
AIN1
DIN
DOUT
SCLK
SYNC
SERIAL INTERFACE/CONTROL REGISTER
BUF
CHARGE
REDISTRIBUTION
DAC
AD7856
.....
....
COMP
CALIBRATION
MEMORY AND
CONTROLLER
SAR + ADC
CONTROL
T/H
I/P
MUX
PRODUCT HIGHLIGHTS
1. Single 5 V supply.
2. Automatic calibration on power-up.
3. Flexible power management options including automatic
power-down after conversion.
4. Operates with reference voltages from 1.2 V to VDD.
5. Analog input range from 0 V to VDD.
6. Eight single-ended or four pseudo-differential input channels.
7. Self- and system calibration.
8. Versatile serial I/O port (SPI/QSPI/8051/
P).
GENERAL DESCRIPTION
The AD7856 is a high speed, low power, 14-bit ADC that oper-
ates from a single 5 V power supply. 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 ensure accurate operation over time and
temperature and it has a number of power-down options for low
power applications.
The AD7856 is capable of 285 kHz throughput rate. The input
track-and-hold acquires a signal in 500 ns and features a pseudo-
differential sampling scheme. The AD7856 voltage range is 0 to
VREF with straight binary output coding. Input signal range is to
the supply and the part is capable of converting full power sig-
nals to 10 MHz.
CMOS construction ensures low power dissipation of typically
60 mW for normal operation and 5.1 mW in power-down mode
at 10 kSPS throughput rate. The part is available in 24-lead,
0.3 inch-wide dual in-line package (DIP), 24-lead small outline
(SOIC) and 24-lead small shrink outline (SSOP) packages.
Please see page 31 for data sheet index.
FEATURES
Single 5 V Supply
285 kSPS Throughput Rate
Self- and System Calibration with Autocalibration on
Power-Up
Eight Single-Ended or Four Pseudo-Differential Inputs
Low Power: 60 mW Typ
Automatic Power-Down After Conversion (2.5
W Typ)
Flexible Serial Interface: 8051/SPI/QSPI/ P Compatible
24-Lead DIP, SOIC and SSOP Packages
APPLICATIONS
Battery-Powered Systems (Personal Digital Assistants,
Medical Instruments, Mobile Communications)
Pen Computers
Instrumentation and Control Systems
High Speed Modems
SPI and QSPI are trademarks of Motorola, Inc.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7856ARZ-REEL7 | 功能描述:IC ADC 14BIT 8CHAN 5V 24SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 位數:12 采樣率（每秒）:3M 數據接口:- 轉換器數目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數目和類型:- |
| AD7856KR | 制造商:Analog Devices 功能描述:ADC Single SAR 285ksps 14-bit Serial 24-Pin SOIC W 制造商:Rochester Electronics LLC 功能描述:8 CH. 14-BIT 300 KSPS ADC I.C. - Bulk |
| AD7856KR-REEL | 功能描述:IC ADC 14BIT 8CH 5V 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯 轉換器數目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7856KR-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 285ksps 14-bit Serial 24-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:8 CH. 14-BIT 300 KSPS ADC I.C. - Tape and Reel |
| AD7856KRZ | 功能描述:IC ADC 14BIT 8CHAN 5V 24SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯 轉換器數目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
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