adc12l032 National Semiconductor Corporation, adc12l032 Datasheet - Page 22

• Manufacturer Part Number: adc12l032
• Description: 3.3v Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
• Manufacturer: National Semiconductor Corporation

www.national.com
Format and Set-Up Tables
The ADC12L030 does not have A/DIN1, A/DIN2, MUXOUT1
and MUXOUT2 pins.
X = Don’t Care
The A/D powers up with no Auto-Cal, no Auto-Zero, 10 CCLK
acquisition time, 12-bit + sign conversion, power up, 12- or
ADC12L038
ADC12L034
ADC12L030
ADC12L032
DI0
Address
H
H
L
L
MUX
and
DI1
H
H
L
L
MUXOUT1 and A/DIN2 tied to MUXOUT2
See Tables 2, 3, 4
See Tables 2, 3, 4
See Tables 2, 3, 4
See Tables 2, 3, 4
See Tables 2, 3, 4
See Tables 2, 3, 4
DI0
DI0
DI0
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
CH0
Analog Channel Addressed and
Assignment with A/DIN1 tied to
+
−
+
DI1
DI1
DI1
H
H
X
L
L
L
L
L
L
L
L
L
L
L
L
DI2
DI2
TABLE 4. ADC12L032 and ADC12L030 Multiplexer Addressing
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
DI3 DI4 DI5 DI6 DI7
CH1
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
−
+
+
DI3 DI4 DI5 DI6
DI2 DI3 DI4 DI5
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
(Continued)
TABLE 5. Mode Programming
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
COM
−
−
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
A/D Input Polarity
22
A/DIN1
Acquisition Time — 6 CCLK Cycles
Assignment
+
−
+
+
12 Bit Conversion of Full-Scale
Acquisition Time — 10 CCLK
Acquisition Time — 18 CCLK
Acquisition Time — 34 CCLK
13-bit MSB first and user mode.
12 Bit Conversion of Offset
(CH1–CH7 become Active
Data Out without Sign
Read Status Register
Data Out with Sign
12 Bit Conversion
12 Bit Conversion
12 Bit Conversion
12 Bit Conversion
8 Bit Conversion
8 Bit Conversion
A/DIN2
Mode Selected
Power Down
User Mode
Test Mode
−
+
−
−
Auto-Zero
Power Up
(Current)
Auto-Cal
Outputs)
Cycles
Cycles
Cycles
MUXOUT1
Channel Assignment
Multiplexer Output
CH0
CH0
CH0
CH1
MUXOUT2
COM
COM
CH1
CH1
12 or 13 Bit MSB First
16 or 17 Bit MSB First
12 or 13 Bit MSB First
12 or 13 Bit LSB First
16 or 17 Bit LSB First
12 or 13 Bit LSB First
8 or 9 Bit MSB First
8 or 9 Bit LSB First
(next Conversion
DO Format
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
Cycle)
Single-Ended
Differential
Mode