參數(shù)資料
型號: AD7655ASTZRL
廠商: Analog Devices Inc
文件頁數(shù): 1/28頁
文件大?。?/td> 0K
描述: IC ADC 16BIT 4CHAN 48LQFP
標準包裝: 2,000
系列: PulSAR®
位數(shù): 16
采樣率(每秒): 1M
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 135mW
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: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 2 個差分,單極
配用: EVAL-AD7655CBZ-ND - BOARD EVALUATION FOR AD7655
Low Cost, 4-Channel, 16-Bit 1 MSPS
PulSAR ADC
AD7655
Rev. B
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
2005 Analog Devices, Inc. All rights reserved.
FEATURES
4-channel, 16-bit resolution ADC
2 track-and-hold amplifiers
Throughput
1 MSPS (normal mode)
888 kSPS (impulse mode)
Analog input voltage range: 0 V to 5 V
No pipeline delay
Parallel and serial 5 V/3 V interface
SPI/QSPI/MICROWIRE/DSP compatible
Single 5 V supply operation
Power dissipation
120 mW typical
2.6 mW @ 10 kSPS
Package
48-lead quad flat package (LQFP)
48-lead frame chip scale package (LFCSP)
Pin-to-pin compatible with the AD7654
Low cost
APPLICATIONS
AC motor control
3-phase power control
4-channel data acquisition
Uninterrupted power supplies
Communications
FUNCTIONAL BLOCK DIAGRAM
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
A/B
16
D[15:0]
BUSY
CS
SER/PAR
OGND
OVDD
DGND
DVDD
SERIAL
PORT
BYTESWAP
RD
AVDD AGND
REFx
REFGND
PD
RESET
CNVST
INAN
SWITCHED
CAP DAC
AD7655
INA1
IMPULSE
MUX
EOC
INA2
A0
INB1
INBN
INB2
TRACK/HOLD
×2
PARALLEL
INTERFACE
03536-001
CLOCK
MUX
Figure 1.
Table 1. PulSAR Selection
Type/kSPS
100 to 250
500 to 570
800 to
1000
>1000
Pseudo
Differential
True Bipolar
True
Differential
18 Bit
Multichannel/
Simultaneous
GENERAL DESCRIPTION
The AD7655 is a low cost, simultaneous sampling, dual-
channel, 16-bit, charge redistribution SAR, analog-to-digital
converter that operates from a single 5 V power supply. It
contains two low noise, wide bandwidth, track-and-hold
amplifiers that allow simultaneous sampling, a high speed
16-bit sampling ADC, an internal conversion clock, error
correction circuits, and both serial and parallel system interface
ports. Each track-and-hold has a multiplexer in front to provide
a 4-channel input ADC. The A0 multiplexer control input
allows the choice of simultaneously sampling input pairs
INA1/INB1 (A0 = low) or INA2/INB2 (A0 = high). The part
features a very high sampling rate mode (normal) and, for low
power applications, a reduced power mode (impulse) where the
power is scaled with the throughput. Operation is specified
from 40°C to +85°C.
PRODUCT HIGHLIGHTS
1.
Multichannel ADC.
The AD7655 features 4-channel inputs with two sample-
and-hold circuits that allow simultaneous sampling.
2.
Fast Throughput.
The AD7655 is a 1 MSPS, charge redistribution, 16-bit SAR
ADC with internal error correction circuitry.
3.
Single-Supply Operation.
The AD7655 operates from a single 5 V supply. In impulse
mode, its power dissipation decreases with throughput.
4.
Serial or Parallel Interface.
Versatile parallel or 2-wire serial interface arrangements
are compatible with both 3 V and 5 V logic.
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