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參數資料
型號: AD7641
廠商: Analog Devices, Inc.
英文描述: 18-Bit, 2 MSPS SAR ADC
中文描述: 18位,2 MSPS的SAR型ADC
文件頁數: 1/24頁
文件大小: 324K
代理商: AD7641
18-Bit, 2 MSPS SAR ADC
Preliminary Technical Data
AD7641
FEATURES
18-bit resolution with no missing codes
2.5V internal low drift refernce
Throughput:
2 MSPS (Warp mode)
1.5 MSPS (Normal mode)
INL: ±2 LSB typical
S/(N+D): 93 dB typical @ 100 kHz ( V
REF
= 2.5 V )
THD: 100 dB typical @ 100 kHz
Differential input range: ±V
REF
(V
REF
up to 2.5 V)
No pipeline delay ( SAR architecture )
Parallel (18-, 16-, or 8-bit bus)
Serial 5 V/3.3 V/2.5 V interface
SPI/QSPI/MICROWIRE/DSP compatible
On-board low drift reference with buffer and
temperature sensor
Single 2.5 V supply operation
Power dissipation: 100 mW typical @ 2 MSPS
Power-down mode
48-LQFP and LFCSP packages
Speed upgrade of the AD7674
Pin-to-pin compatible with the AD7621
APPLICATIONS
Medical instruments
High dynamic data acquisition
Instrumentation
Spectrum analysis
ATE
GENERAL DESCRIPTION
Rev.
Pr E
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
SWITCHED
CAP DAC
18
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
CLOCK
AD7641
D[17:0]
BUSY
RD
CS
MODE0
OGND
OVDD
DGND
DVDD
AVDD
AGND
REF REFGND
IN+
IN-
PD
RESET
SERIAL
PORT
PARALLEL
INTERFACE
CNVST
PDBUF
REFBUFIN
WARP IMPULSE
MODE1
PDREF
REF
TEMP
Figure 1.
Table 1. PulSAR Selection
kSPS
Type
Pseudo
Differential
True Bipolar
True Differential
18 Bit
Multichannel/
Simultaneous
100 to 250 500 to 570
AD7651
AD7660/61
AD7663
AD7675
AD7678
800 to
1000
AD7653
AD7667
AD7671
AD7677
AD7674
>1000
AD7650/52
AD7664/66
AD7665
AD7676
AD7679
AD7621
AD7641
AD7654
AD7655
The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR,
fully differential analog-to-digital converter that operates from
a single 2.5 V power supply. The part contains a high-speed 18-
bit sampling ADC, an internal conversion clock, an internal
reference buffer, error correction circuits, and both serial and
parallel system interface ports. It features a very high sampling
rate mode (Warp) and a fast mode (Normal) for asynchronous
conversion rate applications. The AD7641 is hardware factory
calibrated and comprehensively tested to ensure ac parameters
such as signal-to-noise ratio (SNR) and total harmonic
distortion (THD) in addition to the more traditional dc
parameters of gain, offset and linearity. Operation is specified
from 40°C to +85°C.
PRODUCT HIGHLIGHTS
1.
High resolution and Fast Throughput.
The AD7641 is a 2 MSPS, charge redistribution, 18-bit
SAR ADC (no latency).
2.
Superior INL.
The AD7641 has a maximum integral nonlinearity of
2 LSB with no missing 18-bit codes.
3.
Single-Supply Operation.
Operates from a single 2.5 V supply. Also features a
power-down mode.
4.
Serial or Parallel Interface.
Versatile parallel (18-, 16-, or 8-bit bus) or 2-wire
serial interface arrangement compatible with either
2.5 V, 3.3 V, or 5 V logic.
相關PDF資料
PDF描述
AD7641ACP 18-Bit, 2 MSPS SAR ADC
AD7641ACPRL ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84%
AD7641AST 18-Bit, 2 MSPS SAR ADC
AD7641ASTRL 18-Bit, 2 MSPS SAR ADC
AD7650 16-Bit 1 MSPS SAR Unipolar ADC with Ref
相關代理商/技術參數
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AD7641BCPZ 功能描述:IC ADC 18BIT 2MSPS SAR 48-LFCSP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 其它有關文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數:12 采樣率(每秒):20M 數據接口:并聯 轉換器數目:2 功率耗散(最大):155mW 電壓電源:模擬和數字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應商設備封裝:48-TQFP(7x7) 包裝:Digi-Reel® 輸入數目和類型:4 個單端,單極;2 個差分,單極 產品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6
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