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參數(shù)資料
| 型號： | AD7874BR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System |
| 中文描述： | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大小： | 414K |
| 代理商： | AD7874BR |
AD7874
REV. C
–5–
PIN FUNCT ION DE SCRIPT ION
Pin
Mnemonic
Description
1
V
IN1
Analog Input Channel 1. T his is the first of the four input channels to be converted in a con-
version cycle. Analog input voltage range is
±
10 V.
Analog Input Channel 2. Analog input voltage range is
±
10 V.
Positive supply voltage, +5 V
±
5%. T his pin should be decoupled to AGND.
Interrupt. Active low logic output indicating converter status. See Figure 7.
Convert Start. Logic Input. A low to high transition on this input puts the track/hold into its
hold mode and starts conversion. T he four channels are converted sequentially, Channel 1 to
Channel 4. T he
CONVST
input is asynchronous to CLK and independent of
CS
and
RD
.
Read. Active low logic input. T his input is used in conjunction with
CS
low to enable the
data outputs. Four successive reads after a conversion will read the data from the four chan-
nels in the sequence, Channel 1, 2, 3, 4.
Chip Select. Active low logic input. T he device is selected when this input is active.
Clock Input. An external T T L-compatible clock may be applied to this input pin. Alterna-
tively, tying this pin to V
SS
enables the internal laser trimmed clock oscillator.
Positive Supply Voltage, +5 V
±
5%. Same as Pin 3; both pins must be tied together at the
package. T his pin should be decoupled to DGND.
Data Bit 11 (MSB). T hree-state T T L output. Output coding is 2s complement.
Data Bit 10 to Data Bit 8. T hree-state T T L outputs.
Digital Ground. Ground reference for digital circuitry.
Data Bit 7 to Data Bit 1. T hree-state T T L outputs.
Data Bit 0 (LSB). T hree-state T T L output.
Analog Ground. Ground reference for track/hold, reference and DAC.
Voltage Reference Input. T he reference voltage for the part is applied to this pin. It is inter-
nally buffered, requiring an input current of only
±
1
μ
A. T he nominal reference voltage for
correct operation of the AD7874 is 3 V.
Voltage Reference Output. T he internal 3 V analog reference is provided at this pin. T o oper-
ate the AD7874 with internal reference, REF OUT is connected to REF IN. T he external
load capability of the reference is 500
μ
A.
Negative Supply Voltage, –5 V
±
5%.
Analog Input Channel 3. Analog input voltage range is
±
10 V.
Analog Input Channel 4. Analog input voltage range is
±
10 V.
2
3
4
5
V
IN2
V
DD
INT
CONVST
6
RD
7
8
CS
CLK
9
V
DD
10
11–13
14
15–21
22
23
24
DB11
DB10–DB8
DGND
DB7–DB1
DB0
AGND
REF IN
25
REF OUT
26
27
28
V
SS
V
IN3
V
IN4
ORDE RING GUIDE
Relative
T emperature
Range
SNR
(dBs)
Accuracy
(LSB)
Package
Option
2
Model
1
AD7874AN
AD7874BN
AD7874AR
AD7874BR
AD7874AQ
AD7874BQ
AD7874SQ
3
AD7874SE
3
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
–55
°
C to +125
°
C
70 min
72 min
70 min
72 min
70 min
72 min
70 min
70 min
±
1 max
±
1/2 max
±
1 max
±
1/2 max
±
1 max
±
1/2 max
±
1 max
±
1 max
N-28
N-28
R-28
R-28
Q-28
Q-28
Q-28
E-28A
NOT ES
1
T o order MIL-ST D-883, Class B processed parts, add /883B to part number. Contact
1
our local sales office for military data sheet and availability.
2
E = Leaded Ceramic Chip Carrier; N = Plastic DIP; Q = Cerdip; R = SOIC.
3
Available to /883B processing only.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7874BRMZ | 制造商:Analog Devices 功能描述: |
| AD7874BRZ | 功能描述:IC DAS 12BIT 4CH LC2MOS 28-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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7874SE | 功能描述:IC DAS 12BIT 4CH 5V 28-CLCC 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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7874SE/883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| AD7874SE3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System |
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