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参数资料
| 型号： | EVAL-AD7739EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD7739 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 15.1k |
| 数据接口： | 串行 |
| 输入范围： | ±2.5 V |
| 在以下条件下的电源（标准）： | 85mW @ 5V |
| 工作温度： | -40°C ~ 105°C |
| 已用 IC / 零件： | AD7739 |
| 已供物品： | 板 |
| 相关产品： | AD7739BRUZ-REEL7-ND - IC ADC 24BIT 8CH SIG-DEL 24TSSOP AD7739BRUZ-ND - IC ADC 24BIT 8-CH 24-TSSOP AD7739BRU-REEL-ND - IC ADC 24BIT 8CH SIG-DEL 24TSSOP AD7739BRU-ND - IC ADC 24BIT 8-CH 24-TSSOP |
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AD7739
Data Sheet
Rev. A | Page 16 of 32
CHECKSUM REGISTER
16 Bits, Read/Write Register, Address 0x05
This register is described in the AN-626 Application Note,
ADC ZERO-SCALE CALIBRATION REGISTER
24 Bits, Read/Write Register, Address 0x06,
Default Value 0x80 0000
This register holds the ADC zero-scale calibration coefficient. The
value in this register is used in conjunction with the value in the
ADC full-scale calibration register and the corresponding channel
zero-scale and channel full-scale calibration registers to scale
digitally the conversion results of all channels. The value in this
register is updated automatically following the execution of an
ADC zero-scale self-calibration. Writing this register is possible
in the idle mode only (see the Calibration section for details).
ADC FULL-SCALE CALIBRATION REGISTER
24 Bits, Read/Write Register, Address 0x07,
Default Value 0x80 0000
This register holds the ADC full-scale calibration coefficient.
The value in this register is used in conjunction with the value in
the ADC zero-scale and the corresponding channel zero-scale
and channel full-scale calibration registers to scale digitally the
conversion results of all channels. The value in this register is
updated automatically following the execution of an ADC full-
scale self-calibration. Writing this register is possible in the idle
mode only. Use the ADC full-scale self-calibration only on
+2.5 V and ±2.5 V input voltage ranges (see the Calibration
section for details).
CHANNEL DATA REGISTERS
16-Bit/24-Bit, Read-Only Registers, Address 0x08 to
Address 0x0F, Default Width 16 Bits, Default Value 0x8000
These registers contain the most up-to-date conversion results
corresponding to each analog input channel. The 16-bit or
24-bit data width can be configured by setting the 24/16 bit in
the mode register. The relevant RDY bit in the channel status
register goes high when the result is updated. The RDY bit
returns low once the data register reading begins. The RDY pin
can be configured to indicate when any channel has unread data
or to wait until all enabled channels have unread data. If any
channel data register read operation is in progress when a new
result is updated, no update of the data register occurs. This
avoids having corrupted data. Reading the status registers can
be associated with reading the data registers in the dump mode.
Reading the status registers is always associated with reading
the data registers in the continuous read mode (see the Digital
Interface Description section for details).
CHANNEL ZERO-SCALE CALIBRATION REGISTERS
24 Bits, Read/Write Registers, Address 0x10 to
Address 0x17, Default Value 0x80 0000
These registers hold the particular channel zero-scale
calibration coefficients. The value in these registers is used in
conjunction with the value in the corresponding channel full-
scale calibration register, the ADC zero-scale calibration
register, and the ADC full-scale calibration register to digitally
scale the particular channel conversion results. The value in this
register is updated automatically following the execution of a
channel zero-scale system calibration.
The format of the channel zero-scale calibration register is a
sign bit and a 22-bit unsigned value. Writing this register is
possible in the idle mode only (see the Calibration section
for details).
CHANNEL FULL-SCALE CALIBRATION REGISTERS
24 Bits, Read/Write Registers, Address 0x18 to
Address 0x1F, Default Value 0x20 0000
These registers hold the particular channel full-scale calibration
coefficients. The value in these registers is used in conjunction
with the value in the corresponding channel zero-scale
calibration register, the ADC zero-scale calibration register, and
the ADC full-scale calibration register to digitally scale the
particular channel conversion results. The value in this register
is updated automatically following the execution of a channel
full-scale system calibration. Writing this register is possible in
the idle mode only (see the Calibration section for details).
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