参数资料
型号: AD7738BRU-REEL7
厂商: Analog Devices Inc
文件页数: 27/28页
文件大小: 0K
描述: IC ADC 24BIT 8CH SIG-DEL 28TSSOP
标准包装: 1,000
位数: 24
采样率(每秒): 15.4k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 100mW
电压电源: 模拟和数字
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 带卷 (TR)
输入数目和类型: 8 个单端,单极;8 个单端,双极;4 个差分,单极;4 个差分,双极
配用: EVAL-AD7738EBZ-ND - BOARD EVAL FOR AD7738
REV. 0
–8–
AD7738
PIN FUNCTION DESCRIPTION (continued)
Pin No.
Mnemonic
Pin Description
15
ADCIN(–)
ADC Negative Input. In normal circuit configuration, this pin should be connected to the MUXOUT– pin.
16
ADCIN(+)
ADC Positive Input. In normal circuit configuration, this pin should be connected to the MUXOUT+ pin.
21
REFIN(+)
Positive Terminal of the Differential Reference Input. REFIN+ voltage potential can lie any where between
AVDD and AGND. In normal circuit configuration, this pin should be connected to a 2.5 V reference voltage.
22
REFIN(–)
Negative Terminal of the Differential Reference Input. REFIN– voltage potential can lie any where between
AVDD and AGND. In normal circuit configuration, this pin should be connected to a 0 V reference voltage.
23
AGND
Ground Reference Point for Analog Circuitry
24
RDY
Logic Output. Used as a status output in both conversion mode and calibration mode. In conversion
mode, a falling edge on this output indicates that either any channel or all channels have unread data
available—according to the RDY function bit in the I/O Port register. In calibration mode, a falling edge
on this output indicates that calibration is complete. See more details in Digital Interface Description
section later in this data sheet.
25
DOUT
Serial Data Output with serial data being read from the output shift register on the part. This output
shift register can contain information from any AD7738 register depending on the address bits of the
Communications register.
26
DIN
Serial Data Input (Schmitt triggered) with serial data being written to the input shift register on the part.
Data from this input shift register is transferred to any AD7738 register depending on the address bits of
the Communications register.
27
DVDD
Digital Supply Voltage, 3 V or 5 V Nominal
28
DGND
Ground Reference Point for Digital Circuitry
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