參數(shù)資料
型號: EVAL-AD7641CBZ
廠商: Analog Devices Inc
文件頁數(shù): 1/28頁
文件大小: 0K
描述: BOARD EVALUATION FOR AD7641
產(chǎn)品培訓模塊: ADC Applications
ADC Architectures
ADC DC/AC Performance
標準包裝: 1
系列: PulSAR®
ADC 的數(shù)量: 1
位數(shù): 18
采樣率(每秒): 2M
數(shù)據(jù)接口: 串行
輸入范圍: ±2.5 V
在以下條件下的電源(標準): 2MSPS 帶內(nèi)部基準時為 75mW
工作溫度: -40°C ~ 85°C
已用 IC / 零件: AD7641
已供物品:
相關產(chǎn)品: AD7641BSTZRL-ND - IC ADC 18BIT 2MSPS SAR 48-LQFP
AD7641BCPZRL-ND - IC ADC 18BIT 2MSPS SAR 48-LFCSP
AD7641BSTZ-ND - IC ADC 18BIT 2MSPS SAR 48-LQFP
AD7641BCPZ-ND - IC ADC 18BIT 2MSPS SAR 48-LFCSP
18-Bit, 2 MSPS SAR ADC
AD7641
Rev. 0
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rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
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2006 Analog Devices, Inc. All rights reserved.
FEATURES
Throughput
2 MSPS (wideband warp and warp mode)
1.5 MSPS (normal mode)
INL: ±2 LSB typical, ±3 LSB max; ±8 ppm of full scale
18-bit resolution with no missing codes
Dynamic range: 95.5 dB
SNR: 93.5 dB typical @ 20 kHz (VREF = 2.5 V)
THD: 112 dB typical @ 20 kHz (VREF = 2.5 V)
2.048 V internal reference: typ drift 10 ppm/°C; TEMP output
Differential input range: ±VREF (VREF up to 2.5 V)
No pipeline delay (SAR architecture)
Parallel (18-, 16-, or 8-bit bus) and
serial 5 V/3.3 V/2.5 V interface
SPI/QSPI/MICROWIRE/DSP compatible
Single 2.5 V supply operation
Power dissipation
75 mW typical @ 2 MSPS with internal REF
2 μW in power-down mode
Pb-free, 48-lead LQFP and 48-lead LFCSP_VQ
Speed upgrade of the AD7674, AD7678, AD7679
APPLICATIONS
Medical instruments
High speed data acquisition/high dynamic data acquisition
Digital signal processing
Spectrum analysis
Instrumentation
Communications
ATE
GENERAL DESCRIPTION
The AD7641 is an 18-bit, 2 MSPS, charge redistribution SAR,
fully differential, analog-to-digital converter (ADC) 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 (and buffer), error correction circuits, and
both serial and parallel system interface ports. It features two
very high sampling rate modes (wideband warp and warp) and
a fast mode (normal) for asynchronous rate applications. The
AD7641 is hardware factory calibrated and tested to ensure ac
parameters, such as signal-to-noise ratio (SNR), in addition to
the more traditional dc parameters of gain, offset, and linearity.
The AD7641 is available in Pb-free only packages with
operation specified from 40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
0
4761-
001
18
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
CLOCK
AD7641
DGND
DVDD
AVDD
AGND
REF REFGND
IN+
IN–
PD
RESET
CNVST
PDBUF
REFBUFIN
PDREF
REF
TEMP
D[17:0]
BUSY
RD
CS
D0/OB/2C
OGND
OVDD
MODE1
MODE0
REF AMP
NORMAL
SERIAL
PORT
PARALLEL
INTERFACE
SWITCHED
CAP DAC
WARP
Figure 1.
Table 1. PulSAR Selection
Type/kSPS
100 to
250
500 to
570
650 to
1000
>1000
Pseudo
Differential
True Bipolar
True
Differential
AD7622,
18-Bit
Multichannel/
AD7643
Simultaneous
PRODUCT HIGHLIGHTS
1. Fast Throughput.
The AD7641 is a 2 MSPS, charge redistribution,
18-bit SAR ADC.
2. Superior Linearity.
The AD7641 has no missing 18-bit code.
3. Internal Reference.
The AD7641 has a 2.048 V internal reference with a typical
-chip TEMP sensor.
drift of ±10 ppm/°C and an on
Single-Supply Operation.
4.
2.5 V single supply.
5.
ace
arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.
The AD7641 operates from a
Serial or Parallel Interface.
Versatile parallel (16- or 8-bit bus) or 2-wire serial interf
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