参数资料
型号: AD7192BRUZ
厂商: Analog Devices Inc
文件页数: 4/41页
文件大小: 0K
描述: IC ADC 24BIT 2CH W/PGA 24-TSSOP
产品培训模块: Weigh Scale Introduction
设计资源: Precision Weigh Scale Design Using AD7192 with Internal PGA (CN0119)
标准包装: 62
位数: 24
采样率(每秒): 4.8k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
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: 24-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 24-TSSOP
包装: 管件
输入数目和类型: 2 个差分,单极;2 个差分,双极;4 个伪差分,单极;4 个伪差分,双极
产品目录页面: 777 (CN2011-ZH PDF)
AD7192
Rev. A | Page 11 of 40
Pin No.
Mnemonic
Description
13
AIN3
Analog Input. This pin can be configured as the positive input of a fully differential input pair when used with
AIN4 or as a pseudodifferential input when used with AINCOM.
14
AIN4
Analog Input. This pin can be configured as the negative input of a fully differential input pair when used
with AIN3 or as a pseudodifferential input when used with AINCOM.
15
REFIN1(+)
Positive Reference Input. An external reference can be applied between REFIN1(+) and REFIN1(). REFIN1(+)
can lie anywhere between AVDD and AGND + 1 V. The nominal reference voltage, (REFIN1(+) REFIN1()), is
AVDD, but the part functions with a reference from 1 V to AVDD.
16
REFIN1()
Negative Reference Input. This reference input can lie anywhere between AGND and AVDD 1 V.
17
BPDSW
Bridge Power-Down Switch to AGND.
18
AGND
Analog Ground Reference Point.
19
DGND
Digital Ground Reference Point.
20
AVDD
Analog Supply Voltage, 3 V to 5.25 V. AVDD is independent of DVDD. Therefore, DVDD can be operated at 3 V with
AVDD at 5 V or vice versa.
21
DVDD
Digital Supply Voltage, 2.7 V to 5.25 V. DVDD is independent of AVDD. Therefore, AVDD can be operated at 3 V
with DVDD at 5 V or vice versa.
22
SYNC
Logic input that allows for synchronization of the digital filters and analog modulators when using a number
of AD7192 devices. While SYNC is low, the nodes of the digital filter, the filter control logic, and the
calibration control logic are reset, and the analog modulator is also held in its reset state. SYNC does not
affect the digital interface but does reset RDY to a high state if it is low. SYNC has a pull-up resistor internally
to DVDD.
23
DOUT/RDY
Serial Data Output/Data Ready Output. DOUT/RDYserves a dual purpose. It functions as a serial data output
pin to access the output shift register of the ADC. The output shift register can contain data from any of the
on-chip data or control registers. In addition, DOUT/RDY operates as a data ready pin, going low to indicate
the completion of a conversion. If the data is not read after the conversion, the pin goes high before the next
update occurs. The DOUT/RDY falling edge can be used as an interrupt to a processor, indicating that valid
data is available. With an external serial clock, the data can be read using the DOUT/RDY pin. With CS low, the
data-/control-word information is placed on the DOUT/RDY pin on the SCLK falling edge and is valid on the
SCLK rising edge.
24
DIN
Serial Data Input to the Input Shift Register on the ADC. Data in this shift register is transferred to the control
registers in the ADC, with the register selection bits of the communications register identifying the
appropriate register.
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