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參數(shù)資料
型號: AD7890AR-4
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Circular Connector Cable Assembly; Connector Type A:Circular Receptacle; Connector Type B:Stripped End Leads; Cable Length:10ft RoHS Compliant: Yes
中文描述: 8-CH 12-BIT PROPRIETARY METHOD ADC, SERIAL ACCESS, PDSO24
封裝: MS-013AD, SOIC-24
文件頁數(shù): 1/20頁
文件大小: 302K
代理商: AD7890AR-4
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
AD7890
Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FEATURES
Fast 12-Bit ADC with 5.9
m
s Conversion Time
Eight Single-Ended Analog Input Channels
Selection of Input Ranges:
6
10 V for AD7890-10
0 V to
1
4.096 V for AD7890-4
0 V to
1
2.5 V for AD7890-2
Allows Separate Access to Multiplexer and ADC
On-Chip Track/Hold Amplifier
On-Chip Reference
High Speed, Flexible, Serial Interface
Single Supply, Low Power Operation (50 mW max)
Power-Down Mode (75
m
W typ)
FUNCT IONAL BLOCK DIAGRAM
SIGNAL
SCALING*
SIGNAL
SCALING*
SIGNAL
SCALING*
SIGNAL
SCALING*
SIGNAL
SCALING*
SIGNAL
SCALING*
SIGNAL
SCALING*
SIGNAL
SCALING*
M
U
X
V
DD
REF OUT/
REF IN
+2.5V
REFERENCE
AGND AGND DGND CLK
IN
SCLK
DATA
OUT
DATA
IN
SMODE
OUTPUT/CONTROL REGISTER
MUX
OUT
CLOCK
12-BIT
ADC
SHA
IN
AD7890
C
EXT
CONVST
V
IN1
V
IN2
V
IN3
V
IN4
V
IN5
V
IN6
V
IN7
V
IN8
2k
TRACKHOLD
TFS
RFS
*NO SCALING ON AD7890-2
Power dissipation in normal mode is low at 30 mW typ and the
part can be placed in a standby (power-down) mode if it is not
required to perform conversions. T he AD7890 is fabricated in
Analog Devices’ Linear Compatible CMOS (LC
2
MOS) process,
a mixed technology process that combines precision bipolar cir-
cuits with low power CMOS logic. T he part is available in a
24-pin, 0.3" wide, plastic or hermetic dual-in-line package or in
a 24-pin small outline package (SOIC).
PRODUCT HIGHLIGHT S
1. Complete 12-Bit Data Acquisition System on a Chip
T he AD7890 is a complete monolithic ADC combining an
eight-channel multiplexer, 12-bit ADC, +2.5 V reference and
a track/hold amplifier on a single chip.
2. Separate Access to Multiplexer and ADC
T he AD7890 provides access to the output of the multiplexer
allowing one antialiasing filter for eight channels—a consid-
erable saving over the eight antialiasing filters required if the
multiplexer was internally connected to the ADC.
3. High Speed Serial Interface
T he part provides a high speed serial interface for easy
connection to serial ports of microcontrollers and DSP
processors.
GE NE RAL DE SCRIPT ION
T he AD7890 is an eight-channel 12-bit data acquisition system.
T he part contains an input multiplexer, an on-chip track/hold
amplifier, a high-speed 12-bit ADC, a +2.5 V reference and a high
speed, serial interface. T he part operates from a single +5 V supply
and accepts an analog input range of
±
10 V (AD7890-10), 0 V to
+4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2).
T he multiplexer on the part is independently accessible. T his
allows the user to insert an antialiasing filter or signal condition-
ing, if required, between the multiplexer and the ADC. T his
means that one antialiasing filter can be used for all eight chan-
nels. Connection of an external capacitor allows the user to
adjust the time given to the multiplexer settling to include any
external delays in the filter or signal conditioning circuitry.
Output data from the AD7890 is provided via a high speed bidi-
rectional serial interface port. T he part contains an on-chip con-
trol register, allowing control of channel selection, conversion
start and power-down via the serial port. Versatile, high speed
logic ensures easy interfacing to serial ports on microcontrollers
and digital signal processors.
In addition to the traditional dc accuracy specifications such as
linearity, full-scale and offset errors, the AD7890 is also speci-
fied for dynamic performance parameters including harmonic
distortion and signal-to-noise ratio.
LC
2
MOS 8-Channel, 12-Bit
Serial, Data Acquisition System
相關PDF資料
PDF描述
AD7890BN-10 SECURITY GUARD BLACK LOCKDOWN
AD7890BN-2 Slide Switch; Circuitry:SPDT; Contact Current Max:4A; Switch Operation:On-On; Switch Terminals:Through Hole; Actuator Style:Vertical Flush; Leaded Process Compatible:Yes; Mounting Type:PCB; Switch Features:Vertical Flush Actuator RoHS Compliant: Yes
AD7890BN-4 Slide Switch; Circuitry:SPDT; Contact Current Max:4A; Switch Operation:On-On; Switch Terminals:Through Hole; Leaded Process Compatible:Yes; Mounting Type:PCB; Switch Features:Vertical Actuator RoHS Compliant: Yes
AD7890BR-10 LC2MOS 8-Channel, 12-Bit Serial, Data Acquisition System
AD7890BR-2 LC2MOS 8-Channel, 12-Bit Serial, Data Acquisition System
相關代理商/技術參數(shù)
參數(shù)描述
AD7890AR-4REEL 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)(DAS) 分辨率(位):16 b 采樣率(每秒):21.94k 數(shù)據(jù)接口:MICROWIRE?,QSPI?,串行,SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP(6x6) 包裝:托盤
AD7890ARZ-10 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Data Converter Basics 標準包裝:1 系列:- 類型:電機控制 分辨率(位):12 b 采樣率(每秒):1M 數(shù)據(jù)接口:串行,并聯(lián) 電壓電源:單電源 電源電壓:2.7 V ~ 3.6 V,4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:100-TQFP 供應商設備封裝:100-TQFP(14x14) 包裝:剪切帶 (CT) 其它名稱:296-18373-1
AD7890ARZ-10REEL 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)(DAS) 分辨率(位):16 b 采樣率(每秒):21.94k 數(shù)據(jù)接口:MICROWIRE?,QSPI?,串行,SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP(6x6) 包裝:托盤
AD7890ARZ-2 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)(DAS) 分辨率(位):16 b 采樣率(每秒):21.94k 數(shù)據(jù)接口:MICROWIRE?,QSPI?,串行,SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP(6x6) 包裝:托盤
AD7890ARZ-2REEL 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)(DAS) 分辨率(位):16 b 采樣率(每秒):21.94k 數(shù)據(jù)接口:MICROWIRE?,QSPI?,串行,SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP(6x6) 包裝:托盤
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