参数资料
型号: AD7765BRUZ
厂商: Analog Devices Inc
文件页数: 24/33页
文件大小: 0K
描述: IC ADC 24BIT S/D 156KSPS 28TSSOP
标准包装: 50
位数: 24
采样率(每秒): 156k
数据接口: 串行,SPI?
转换器数目: 1
功率耗散(最大): 371mW
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-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 管件
输入数目和类型: 1 个差分,单极;1 个差分,双极
产品目录页面: 779 (CN2011-ZH PDF)
AD7765
Rev. A | Page 29 of 32
GAIN REGISTER—ADDRESS 0x0004
Non-Bit-Mapped, Default Value 0xA000
The gain register is scaled such that 0x8000 corresponds to a
gain of 1.0. The default value of this register is 1.25 (0xA000).
This results in a full-scale digital output when the input is at
80% of VREF+, tying in with the maximum analog input range
of ±80% of VREF+ p-p.
OVERRANGE REGISTER—ADDRESS 0x0005
Non-Bit-Mapped, Default Value 0xCCCC
The overrange register value is compared with the output of the
first decimation filter to obtain an overload indication with
minimum propagation delay. This is prior to any gain scaling or
offset adjustment. The default value is 0xCCCC, which corre-
sponds to 80% of VREF+ (the maximum permitted analog input
voltage). Assuming VREF+ = 4.096 V, the bit is then set when the
input voltage exceeds approximately 6.55 V p-p differential. The
overrange bit is set immediately if the analog input voltage
exceeds 100% of VREF+ for more than four consecutive samples
at the modulator rate.
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