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參數(shù)資料
| 型號： | AD7874BRZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS 12BIT 4CH LC2MOS 28-SOIC |
| 標準包裝： | 1 |
| 類型： | 數(shù)據采集系統(tǒng)（DAS） |
| 分辨率（位）： | 12 b |
| 采樣率（每秒）： | 116k |
| 數(shù)據接口： | 并聯(lián) |
| 電壓電源： | 雙 ± |
| 電源電壓： | ±5V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 28-SOIC W |
| 包裝： | 管件 |
AD7874
REV. C
–5–
PIN FUNCTION DESCRIPTION
Pin
Mnemonic
Description
1VIN1
Analog Input Channel 1. This is the first of the four input channels to be converted in a con-
version cycle. Analog input voltage range is
±10 V.
2VIN2
Analog Input Channel 2. Analog input voltage range is
±10 V.
3VDD
Positive supply voltage, +5 V
± 5%. This pin should be decoupled to AGND.
4
INT
Interrupt. Active low logic output indicating converter status. See Figure 7.
5
CONVST
Convert Start. Logic Input. A low to high transition on this input puts the track/hold into its
hold mode and starts conversion. The four channels are converted sequentially, Channel 1 to
Channel 4. The CONVST input is asynchronous to CLK and independent of CS and RD.
6
RD
Read. Active low logic input. This 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.
7
CS
Chip Select. Active low logic input. The device is selected when this input is active.
8
CLK
Clock Input. An external TTL-compatible clock may be applied to this input pin. Alterna-
tively, tying this pin to VSS enables the internal laser trimmed clock oscillator.
9VDD
Positive Supply Voltage, +5 V
± 5%. Same as Pin 3; both pins must be tied together at the
package. This pin should be decoupled to DGND.
10
DB11
Data Bit 11 (MSB). Three-state TTL output. Output coding is 2s complement.
11–13
DB10–DB8
Data Bit 10 to Data Bit 8. Three-state TTL outputs.
14
DGND
Digital Ground. Ground reference for digital circuitry.
15–21
DB7–DB1
Data Bit 7 to Data Bit 1. Three-state TTL outputs.
22
DB0
Data Bit 0 (LSB). Three-state TTL output.
23
AGND
Analog Ground. Ground reference for track/hold, reference and DAC.
24
REF IN
Voltage Reference Input. The reference voltage for the part is applied to this pin. It is inter-
nally buffered, requiring an input current of only
±1 A. The nominal reference voltage for
correct operation of the AD7874 is 3 V.
25
REF OUT
Voltage Reference Output. The internal 3 V analog reference is provided at this pin. To oper-
ate the AD7874 with internal reference, REF OUT is connected to REF IN. The external
load capability of the reference is 500
A.
26
VSS
Negative Supply Voltage, –5 V
± 5%.
27
VIN3
Analog Input Channel 3. Analog input voltage range is
±10 V.
28
VIN4
Analog Input Channel 4. Analog input voltage range is
±10 V.
ORDERING GUIDE
Relative
Temperature
SNR
Accuracy
Package
Model
1
Range
(dBs)
(LSB)
Option
2
AD7874AN
–40
°C to +85°C
70 min
±1 max
N-28
AD7874BN
–40
°C to +85°C
72 min
±1/2 max
N-28
AD7874AR
–40
°C to +85°C
70 min
±1 max
R-28
AD7874BR
–40
°C to +85°C
72 min
±1/2 max
R-28
AD7874AQ
–40
°C to +85°C
70 min
±1 max
Q-28
AD7874BQ
–40
°C to +85°C
72 min
±1/2 max
Q-28
AD7874SQ
3
–55
°C to +125°C 70 min
±1 max
Q-28
AD7874SE3
–55
°C to +125°C 70 min
±1 max
E-28A
NOTES
1To order MIL-STD-883, Class B processed parts, add /883B to part number. Contact
1our local sales office for military data sheet and availability.
2E = Leaded Ceramic Chip Carrier; N = Plastic DIP; Q = Cerdip; R = SOIC.
3Available to /883B processing only.
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| AD7874SE | 功能描述:IC DAS 12BIT 4CH 5V 28-CLCC RoHS:否 類別:集成電路 (IC) >> 數(shù)據采集 - ADCs/DAC - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據接口: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 |
| 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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| AD7874SQ/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 |
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