参数资料
型号: AD7870KNZ
厂商: Analog Devices Inc
文件页数: 28/28页
文件大小: 0K
描述: IC ADC 12BIT SAMPLING 3V 24-DIP
产品变化通告: Conversion Time Change
标准包装: 15
位数: 12
采样率(每秒): 100k
数据接口: 串行,并联
转换器数目: 1
功率耗散(最大): 95mW
电压电源: 双 ±
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 24-DIP(0.300",7.62mm)
供应商设备封装: 24-PDIP
包装: 管件
输入数目和类型: 1 个单端,双极
AD7870/AD7875/AD7876
Rev. C | Page 9 of
28
DIP and SOIC
Pin No.
PLCC
Pin No.
Mnemonic
Function
18
21
AGND
Analog Ground. Ground reference for track-and-hold, reference and DAC.
19
23
REF OUT
Voltage Reference Output. The internal 3 V reference is provided at this pin. The external load capability is
500 μA.
20
24
VIN
Analog Input. The analog input range is ±3 V for the AD7870, ±10 V for the AD7876, and 0 V to +5 V for the
AD7875.
21
25
VSS
Negative Supply, 5 V ± 5%.
22
26
12/8/CLK
Three Function Input. Defines the data format and serial clock format. With this pin at +5 V, the output
data for-mat is 12-bit parallel only. With this pin at 0 V, either byte or serial data is available and SCLK is
not continuous. With this pin at 5 V, either byte or serial data is again available but SCLK is now
continuous.
23
27
CONVST
Convert Start. A low to high transition on this input puts the track-and-hold into its hold mode and
starts conversion. This input is asynchronous to the CLK input.
24
28
CS
Chip Select. Active low logic input. The device is selected when this input is active. With CONVST tied
low, a new conversion is initiated when CS goes low.
Table 6. Output Data for Byte Interfacing
HBEN
DB7/Low
DB6/Low
DB5/Low
DB4/Low
DB3/DB11
DB2/DB10
DB1/DB9
DB0/DB8
High
Low
DB11(MSB)
DB10
DB9
DB8
Low
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0 (LSB)
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