參數(shù)資料
型號： ADC12138CIMSA
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： ADC
英文描述： Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
中文描述： 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO28
封裝： SSOP-28
文件頁數(shù)： 26/41頁
文件大?。?/td> 1085K
代理商： ADC12138CIMSA
Tables
(Continued)
TABLE 3. ADC12130 and ADC12132 Multiplexer Addressing
Analog Channel Addressed
and Assignment
with A/DIN1 tied to MUXOUT1
and A/DIN2 tied to MUXOUT2
CH0
CH1
+
+
A/D Input
Polarity
Assignment
Multiplexer
Output
Channel
Assignment
MUXOUT1
CH0
CH0
CH0
CH1
Mode
MUX
Address
DI0
L
L
H
H
DI1
L
H
L
H
COM
A/DIN1
+
+
+
A/DIN2
+
MUXOUT2
CH1
CH1
COM
COM
+
Differential
Single-Ended
+
Note:
ADC12130 do not have A/DIN1, A/DIN2, MUXOUT1 and MUXOUT2 pins.
TABLE 4. Mode Programming
ADC12138
ADC12130
and
ADC12132
DI0
DI1
DI2
DI3
DI4
DI5
DI6
DI7
Mode Selected
(Current)
DO Format
(next Conversion
Cycle)
DI0
DI1
DI2
DI3
DI4
DI5
See Table 2 or Table
3
See Table 2 or Table
3
See Table 2 or Table
3
See Table 2 or Table
3
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
H
H
L
H
H
L
L
H
X
L
L
L
L
12 Bit Conversion
12 or 13 Bit MSB First
L
L
L
H
12 Bit Conversion
16 or 17 Bit MSB First
L
H
L
L
12 Bit Conversion
12 or 13 Bit LSB First
L
H
L
H
12 Bit Conversion
16 or 17 Bit LSB First
L
L
L
L
L
L
L
L
L
L
L
L
X
L
L
L
L
L
L
L
L
L
L
L
L
X
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
H
H
L
L
L
H
H
H
H
H
H
L
H
L
H
L
H
H
L
L
L
L
H
H
Auto Cal
Auto Zero
Power Up
Power Down
Read Status Register
Data Out without Sign
Data Out with Sign
Acquisition Time—6 CCLK Cycles
Acquisition Time—10 CCLK Cycles
Acquisition Time—18 CCLK Cycles
Acquisition Time—34 CCLK Cycles
User Mode
Test Mode
(CH1–CH7 become Active Outputs)
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
Note:
The A/D powers up with no Auto Cal, no Auto Zero, 10 CCLK acquisition time, 12-bit + sign conversion, power up, 12- or 13-bit MSB First, and user mode.
X = Don’t Care
TABLE 5. Conversion/Read Data Only Mode Programming
CS
L
L
H
X
CONV
L
H
X
X
PD
L
L
L
H
Mode
See Table 4 for Mode
Read Only (Previous DO Format). No Conversion.
Idle
Power Down
X = Don’t Care
A
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