參數(shù)資料
型號(hào)： AD7691BRMZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 1/28頁(yè)
文件大?。?/td> 0K
描述： IC ADC 18BIT SAR 250KSPS 10-MSOP
標(biāo)準(zhǔn)包裝： 1
系列： PulSAR®
位數(shù)： 18
采樣率（每秒）： 250k
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 12.5mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-MSOP
包裝： 管件
輸入數(shù)目和類型： 1 個(gè)差分，雙極
產(chǎn)品目錄頁(yè)面： 778 (CN2011-ZH PDF)
配用： EVAL-AD7691CBZ-ND - BOARD EVALUATION FOR AD7691CBZ
18-Bit, 1.5 LSB INL, 250 kSPS PulSAR
Differential ADC in MSOP/QFN
Data Sheet
AD7691
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2006–2012 Analog Devices, Inc. All rights reserved.
FEATURES
18-bit resolution with no missing codes
Throughput: 250 kSPS
INL: ±0.75 LSB typical, ±1.5 LSB maximum (±6 ppm of FSR)
Dynamic range: 102 dB typical @ 250 kSPS
Oversampled dynamic range: 125 dB @1 kSPS
Noise-free code resolution: 20 bits @ 1 kSPS
Effective resolution: 22.7 bits @ 1 kSPS
SINAD: 101.5 dB typical @ 1 kHz
THD: 125 dB typical @ 1 kHz
True differential analog input range: ±VREF
0 V to VREF with VREF up to VDD on both inputs
No pipeline delay
Single-supply 2.3 V to 5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
Ability to daisy-chain multiple ADCs
Optional busy indicator feature
Power dissipation
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS
1.4 μW @ 2.5 V/100 SPS
Standby current: 1 nA
10-lead packages: MSOP (MSOP-8 size) and
3 mm × 3 mm QFN (LFCSP) (SOT-23 size)
Pin-for-pin compatible with the18-bit AD7690 and
16-bit AD7693, AD7688, and AD7687
APPLICATIONS
Battery-powered equipment
Data acquisitions
Seismic data acquisition systems
Instrumentation
Medical instruments
1.5
–1.5
0
262144
CODE
IN
L
(
L
S
B
)
1.0
0.5
0
–0.5
–1.0
65536
131072
196608
POSITIVE INL = 0.43LSB
NEGATIVE INL = –0.62LSB
06
14
6-
0
25
Figure 1. Integral Nonlinearity vs. Code, 5 V
APPLICATION DIAGRAM
AD7691
REF
GND
VDD
IN+
IN–
VIO
SDI
SCK
SDO
CNV
+1.8V TO VDD
3- OR 4-WIRE
INTERFACE
(SPI, DAISY CHAIN, CS)
+0.5V TO VDD
±10V, ±5V, ...
+2.5V TO +5V
ADA4941
0
6
146-
001
Figure 2.
Table 1. MSOP, QFN (LFCSP)/SOT-23
14-/16-/18-Bit PulSAR ADC
Type
100
kSPS
250
kSPS
400 kSPS to
500 kSPS
≥1000
kSPS
ADC
Driver
18-Bit True
Differential
16-Bit True
Differential
16-Bit
Pseudo
Differential
14-Bit
Pseudo
Differential
GENERAL DESCRIPTION
The AD7691 is an 18-bit, charge redistribution, successive
approximation, analog-to-digital converter (ADC) that operates
from a single power supply, VDD, between 2.3 V and 5 V. It
contains a low power, high speed, 18-bit sampling ADC with no
missing codes, an internal conversion clock, and a versatile
serial interface port. On the CNV rising edge, it samples the
voltage difference between the IN+ and IN pins. The voltages
on these pins swing in opposite phases between 0 V and REF.
The reference voltage, REF, is applied externally and can be set
up to the supply voltage.
The part’s power scales linearly with throughput.
The SPI-compatible serial interface also features the ability,
using the SDI input, to daisy-chain several ADCs on a single
3-wire bus and provides an optional busy indicator. It is compatible
with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIO supply.
The AD7691 is housed in a 10-lead MSOP or a 10-lead QFN
(LFCSP) with operation specified from 40°C to +85°C.
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AD7691BRMZ-RL7 功能描述:IC ADC 18BIT SAR 250KSPS 10-MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)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(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極
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