参数资料
型号: AD7321BRUZ-REEL7
厂商: Analog Devices Inc
文件页数: 16/37页
文件大小: 0K
描述: IC ADC 12BIT+ SAR 2CHAN 14TSSOP
标准包装: 1,000
位数: 12
采样率(每秒): 500k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 17mW
电压电源: 双 ±
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 14-TSSOP
包装: 带卷 (TR)
输入数目和类型: 2 个单端,单极;2 个单端,双极;1 个差分,单极;1 个差分,双极
配用: EVAL-AD7321CBZ-ND - BOARD EVALUATION FOR AD7321
AD7321
Data Sheet
Rev. B | Page 22 of 36
REGISTERS
The AD7321 has two programmable registers: the control register and the range register. These registers are write only registers.
ADDRESSING REGISTERS
A serial transfer on the AD7321 consists of 16 SCLK cycles. The three MSBs on the DIN line during the 16 SCLK transfer are decoded to
determine which register is addressed. The three MSBs consist of the write bit, a ZERO bit, and the register select bit. The register select
bit is used to determine which of the two on-board registers is selected. The write bit determines if the data on the DIN line following the
register select bit loads into the addressed register. If the write bit is 1, the bits load into the register addressed by the register select bit. If
the write bit is 0, the data on the DIN line does not load into any register.
Combinations of the write bit, the ZERO bit, and the register select bit other than those specified in Table 8 access registers for Analog
Devices internal use only. Do not access these registers, as doing so may lead to unspecified operation of the device.
Table 8. Decoding Register Select Bits and Write Bit
Write
ZERO
Register Select
Description
0
Data on the DIN line during this serial transfer is ignored.
1
0
This combination selects the control register. The subsequent 12 bits are loaded into
the control register.
1
0
1
This combination selects the range register. The subsequent 6 bits are loaded into the
range register.
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