VREF 1 R
參數(shù)資料
型號(hào): AD7538KRZ-REEL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 14/16頁(yè)
文件大?。?/td> 0K
描述: IC DAC 14BIT W/BUFF 24-SOIC
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
產(chǎn)品變化通告: Product Discontinuance 27/Oct/2011
標(biāo)準(zhǔn)包裝: 1,000
設(shè)置時(shí)間: 1.5µs
位數(shù): 14
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 單電源
功率耗散(最大): 1W
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 W
包裝: 帶卷 (TR)
輸出數(shù)目和類型: 1 電流,單極;1 電流,雙極
采樣率(每秒): 667k
AD7538
Rev. B | Page 7 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VREF 1
RFB 2
IOUT 3
AGND 4
VSS
24
VDD
23
WR
22
CS
21
DGND 5
(MSB) DB13 6
DB12 7
LDAC
20
DB0 (LSB)
19
DB1
18
DB11 8
DB2
17
DB10 9
DB3
16
DB9 10
DB4
15
DB8 11
DB5
14
DB7 12
DB6
13
AD7538
TOP VIEW
(Not to Scale)
0
11
3
9
-0
0
3
Figure 3. Pin Configuration
Table 5. Pin Function Description
Pin No.
Mnemonic
Description
1
VREF
Voltage Reference.
2
RFB
Feedback Resistor. Used to close the loop around an external op amp.
3
IOUT
Current Output Terminal.
4
AGND
Analog Ground
5
DGND
Digital Ground.
6 to 19
DB13 to DB0
Data Inputs. Bit DB13 (MSB) to Bit DB0 (LSB).
20
LDAC
Chip Select Input. Active low.
21
CS
Asynchronous Load DAC Input. Active low.
22
WR
Write Input. Active low.
CS
LDAC
WR
Operation
0
1
0
Load input register.
1
0
Load DAC register from input register.
0
Input and DAC registers are transparent.
1
No operation.
1
No operation.
23
VDD
+12 V to +15 V Supply Input.
24
VSS
Bias pin for high temperature low leakage configuration. To implement low leakage system, the pin should be
at a negative voltage. See Figure 6 and Figure 8 for recommended circuitry.
1 X = don’t care.
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