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參數資料
| 型號： | AD7997 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| 中文描述： | 8通道，10 -和12位ADC與I2CCompatible |
| 文件頁數： | 18/32頁 |
| 文件大小： | 1056K |
| 代理商： | AD7997 |
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AD7997/AD7998
INTERNAL REGISTER STRUCTURE
The AD7997/AD7998 contain 17 internal registers that are used
to store conversion results, high and low conversion limits, and
information to configure and control the device (see Figure 25).
Sixteen are data registers and one is an address pointer register.
Rev. 0 | Page 18 of 32
Each data register has an address that the address pointer register
points to when communicating with it. The conversion result
register is the only data register that is read only.
ADDRESS POINTER REGISTER
Because it is the register to which the first data byte of every
write operation is written automatically, the address pointer
register does not have and does not require an address. The
address pointer register is an 8-bit register in which the 4 LSBs
are used as pointer bits to store an address that points to one of
the AD7997/AD7998’s data registers. The 4 MSBs are used as
command bits when operating in Mode 2 (see the Modes of
Operation section). The first byte following each write address
is to the address pointer register, containing the address of one
of the data registers. The 4 LSBs select the data register to which
subsequent data bytes are written. Only the 4 LSBs of this register
are used to select a data register. On power-up, the address
pointer register contains all 0s, pointing to the conversion result
register.
Table 7. Address Pointer Register
C4
C3
C2
C1
0
0
0
0
P3
P2
Register Select
P1
P0
Table 8. AD7997/AD7998 Register Addresses
P3
P2
P1
P0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
Registers
Conversion Result Register (Read)
Alert Status Register (Read/Write)
Configuration Register (Read/Write)
Cycle Timer Register (Read/Write)
DATA
LOW
Reg CH1 (Read/Write)
DATA
HIGH
Reg CH1 (Read/Write)
Hysteresis Reg CH1 (Read/Write)
DATA
LOW
Reg CH2 (Read/Write)
DATA
HIGH
Reg CH2 (Read/Write)
Hysteresis Reg CH2 (Read/Write)
DATA
LOW
Reg CH3 (Read/Write)
DATA
HIGH
Reg CH3 (Read/Write)
Hysteresis Reg CH3 (Read/Write)
DATA
LOW
Reg CH4 (Read/Write)
DATA
HIGH
Reg CH4 (Read/Write)
Hysteresis Reg CH4 (Read/Write)
CONFIGURATION
REGISTER
ADDRESS
POINTER
REGISTER
SERIAL BUS INTERFACE
SDA
SCL
D
A
T
A
DATA
LOW
REGISTER CH2
DATA
HIGH
REGISTER CH2
DATA
LOW
REGISTER CH1
HYSTERESIS
REGISTER CH1
DATA
HIGH
REGISTER CH1
CYCLE TIMER
REGISTER
ALERT STATUS
REGISTER
CONVERSION
RESULT REGISTER
HYSTERESIS
REGISTER CH2
DATA
HIGH
REGISTER CH3
DATA
LOW
REGISTER CH3
HYSTERESIS
REGISTER CH3
DATA
HIGH
REGISTER CH4
DATA
LOW
REGISTER CH4
HYSTERESIS
REGISTER CH4
0
Figure 25. AD7997/AD7998 Register Structure
相關PDF資料 |
PDF描述 |
|---|---|
| AD7997BRU-0 | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRU-0REEL | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRU-1 | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRU-1REEL | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
| AD7997BRUZ-03 | 8-Channel, 10- and 12-Bit ADCs with I2CCompatible |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7997BRU-0 | 功能描述:IC ADC 10BIT 8CHAN I2C 20TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:16 采樣率（每秒）:45k 數據接口:串行 轉換器數目:2 功率耗散（最大）:315mW 電壓電源:模擬和數字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數目和類型:2 個單端，單極 |
| AD7997BRU-0REEL | 功能描述:IC ADC 10BIT 8CHAN I2C 20TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:2,500 系列:- 位數:16 采樣率（每秒）:15 數據接口:MICROWIRE?，串行，SPI? 轉換器數目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應商設備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數目和類型:16 個單端，雙極；8 個差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7997BRU-1 | 制造商:Analog Devices 功能描述:ADC Single SAR 188ksps 10-bit Serial 20-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:8-CHANNEL, 10-BIT ADC WITH 12C ITF I.C. - Bulk |
| AD7997BRU-1REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 188ksps 10-bit Serial 20-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 188KSPS 10-BIT SERL 20SSOP - Tape and Reel |
| AD7997BRU-O | 制造商:Analog Devices 功能描述: |
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