參數(shù)資料
型號: AD7738BRU
廠商: Analog Devices Inc
文件頁數(shù): 4/28頁
文件大?。?/td> 0K
描述: IC ADC 24BIT 8-CH 28-TSSOP
標(biāo)準(zhǔn)包裝: 50
位數(shù): 24
采樣率(每秒): 15.4k
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: 28-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 28-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-AD7738EBZ-ND - BOARD EVAL FOR AD7738
REV. 0
–12–
AD7738
Table VII. Register Summary
Addr
Dir
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
hex
Default Value
Communications
00
W
0
R/
W
6-Bit Register Address
I/O Port
01
R/W
P0
P1
P0 DIR P1 DIR
RDY FN
0
SYNC
P0 Pin
P1 Pin
1
0
Revision
02
R
Chip Revision Code
Chip Generic Code
xx
x
0
1
Test
03
R/W
24 Bits Manufacturing Test Register
ADC Status
04
R
RDY7
RDY6
RDY5
RDY4
RDY3
RDY2
RDY1
RDY0
00
0
00
Checksum
05
R/W
16-Bit Checksum Register
ADC ZS Calibration
06
R/W
24-Bit ADC Zero-Scale Calibration Register
800000h
ADC FS
07
R/W
24-Bit ADC Full-Scale Register
800000h
Channel Data
1
08-0F
R
16-/24-Bit Data Registers
8000h
Channel ZS Calibration
1
10–17
R/W
24-Bit Channel Zero-Scale Calibration Registers
800000h
Channel FS Calibration
1
18–1F
R/W
24-Bits Channel Full-Scale Calibration Registers
200000h
Channel Status
1
20–27
R
CH2
CH1
CH0
0/P0
RDY/P1
NOREF
SIGN
OVR
Channel Number
0
Channel Setup
1
28–2F
R/W
BUF OFF COM1 COM0
Stat. Opt. ENABLE
RNG2
RNG1
RNG0
00
0
00
Channel Conv. Time
1
30–37
R/W
CHOP
FW (7-Bit Filter Word)
1
11h
Mode
2
38–3F
R/W
MD2
MD1
MD0
CLKDIS
DUMP
Cont. RD
24/16 Bits CLAMP
00
0
00
NOTES
1The three LSBs of the register address, i.e., Bit 2, Bit 1, and Bit 0 in the Communication register, specify the channel number of the register being accessed.
2There is 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 will be applied. Address 38h only must be used for reading from the Mode register.
Table VIII. Operational Mode Summary
MD2
MD1
MD0
Mode
000
Idle Mode
001
Continuous Conversion Mode
010
Single Conversion Mode
011
Power-Down (Standby) Mode
100
ADC Zero-Scale Self Calibration
101
For Future Use
110
Channel Zero-Scale System Calibration
111
Channel Full-Scale System Calibration
Table IX. Input Range Summary
RNG2
RNG1
RNG0
Nominal Input Voltage Range
10
0
±2.5 V
10
10 V to +2.5 V
00
0
±1.25 V
00
10 V to +1.25 V
01
0
±0.625 V
01
10 V to +0.625 V
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