參數(shù)資料
型號: AD7739BRU
廠商: Analog Devices Inc
文件頁數(shù): 5/32頁
文件大?。?/td> 0K
描述: IC ADC 24BIT 8-CH 24-TSSOP
標(biāo)準(zhǔn)包裝: 1
位數(shù): 24
采樣率(每秒): 15.1k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 100mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 管件
輸入數(shù)目和類型: 8 個單端,單極;8 個單端,雙極;4 個差分,單極;4 個差分,雙極
配用: EVAL-AD7739EBZ-ND - BOARD EVAL FOR AD7739
Data Sheet
AD7739
Rev. A | Page 13 of 32
REGISTER DESCRIPTIONS
Table 11. Register Summary
Addr
Dir
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
(hex)
Default Value
0x00
W
0
R/W
6-bit register address
0x01
R/W
P0
P1
P0 DIR
P1 DIR
RDYFN
REDPWR
0
Sync
P0 pin
P1 pin
1
0
0x02
R
Chip revision code
Chip generic code
x
1
0
1
0x03
R/W
24-bit manufacturing test register
0x04
R
RDY7
RDY6
RDY5
RDY4
RDY3
RDY2
RDY1
RDY0
0
0x05
R/W
16-bit checksum register
0x06
R/W
24-bit ADC zero-scale calibration register
0x80 0000
0x07
R/W
24-bit ADC full-scale register
0x80 0000
0x08 to
0x0F
R
16-/24-bit data registers
0x8000
0x10 to
0x17
R/W
24-bit channel zero-scale calibration registers
0x80 0000
0x18 to
0x1F
R/W
24-bit channel full-scale calibration registers
0x20 0000
0x20 to
0x27
R
CH2
CH1
CH0
0/P0
RDY/P1
NOREF
Sign
OVR
Channel number
0
0x28 to
0x2F
R/W
BUFOFF
COM1
COM0
Stat OPT
Enable
RNG2
RNG1
RNG0
0
0x30 to
0x37
R/W
Chop
FW (7-bit filter word)
1
0x11
0x38 to
0x3F
R/W
MD2
MD1
MD0
CLKDIS
Dump
Cont RD
24/16 bit
Clamp
0
1
The three LSBs of the register address, that is, Bit 2, Bit 1, and Bit 0 in the communications register, specify the channel number of the register being accessed.
2
The AD7739 has only one mode register, although the mode register can be accessed in one of eight address locations. The address used to write the mode register
specifies the ADC channel on which the mode is applied. Only Address 0x38 must be used for reading from the mode register.
Table 12. Operational Mode Summary
MD2
MD1
MD0
Mode
0
Idle
0
1
Continuous conversion
0
1
0
Single conversion
0
1
Power-down (standby)
1
0
ADC zero-scale self-calibration
1
0
1
ADC full-scale self-calibration (for 2.5 V)
1
0
Channel zero-scale system calibration
1
Channel full-scale system calibration
Table 13. Input Range Summary
RNG2
RNG1
RNG0
Nominal Input Voltage Range
1
0
±2.5 V
1
0
1
+2.5 V
0
±1.25 V
0
1
+1.25 V
0
1
0
±0.625 V
0
1
+0.625 V
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