参数资料
型号: AD7708BR
厂商: Analog Devices Inc
文件页数: 5/44页
文件大小: 0K
描述: IC ADC 16BIT R-R 8/10CH 28-SOIC
标准包装: 27
位数: 16
采样率(每秒): 1.37k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 3.84mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
供应商设备封装: 28-SOIC W
包装: 管件
输入数目和类型: 4 个差分,单极;4 个差分,双极;8 个伪差分,单极;8 个伪差分,双极
配用: EVAL-AD7708EBZ-ND - BOARD EVAL FOR AD7708
REV. 0
AD7708/AD7718
–13–
Pin No
Mnemonic
Function
21
CS
Chip Select Input. This is an active low logic input used to select the AD7708/AD7718.
CS can
be used to select the AD7708/AD7718 in systems with more than one device on the serial bus or
as a frame synchronization signal in communicating with the device.
CS can be hardwired low,
allowing the AD7708/AD7718 to be operated in 3-wire mode with SCLK, DIN, and DOUT
used to interface with the device.
22
RDY
RDY is a logic low status output from the AD7708/AD7718. RDY is low when valid data exists
in the data register for the selected channel. This output returns high on completion of a read
operation from the data register. If data is not read,
RDY will return high prior to the next update
indicating to the user that a read operation should not be initiated. The
RDY pin also returns
low following the completion of a calibration cycle.
RDY does not return high after a calibration
until the mode bits are written to enabling a new conversion or calibration.
23
DOUT
Serial data output with serial data being read from the output shift register of the ADC. The output
shift register can contain data from any of the on-chip data, calibration or control registers.
24
DIN
Serial Data Input with serial data being written to the input shift register on the AD7708/AD7718
Data in this shift register is transferred to the calibration or control registers within the ADC
depending on the selection bits of the Communications register.
25
DGND
Ground Reference Point for the Digital Circuitry.
26
DVDD
Digital Supply Voltage, 3 V or 5 V Nominal.
27
XTAL2
Output from the 32 kHz Crystal Oscillator or Resonator Inverter.
28
XTAL1
Input to the 32 kHz Crystal Oscillator or Resonator Inverter.
PIN CONFIGURATION
14
13
12
11
17
16
15
20
19
18
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
AD7708/
AD7718
AIN7
DGND
DVDD
XTAL2
XTAL1
AIN8
AVDD
AGND
RDY
DOUT
DIN
REFIN1(–)
REFIN1(+)
AIN1
AIN2
AIN3
AIN4
RESET
SCLK
CS
AIN5
AINCOM
REFIN2(+)/AIN9
REFIN2(–)/AIN10
P1
AIN6
P2
AGND
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