adc12132 National Semiconductor Corporation, adc12132 Datasheet - Page 27

• Manufacturer Part Number: adc12132
• Description: Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
• Manufacturer: National Semiconductor Corporation

ADC12132 *
ADC12138
ADC12130
DI0
Format and Set-Up Tables
Note: ADC12130 do not have A/DIN1, A/DIN2, MUXOUT1 and MUXOUT2 pins.
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
H
H
L
L
X = Don’t Care
Address
and
* ADC12132 is obsolete; shown for reference only.
* ADC12132 is obsolete; shown for reference only.
MUX
DI1
CS
H
H
L
L
H
X
L
L
See Table 2 or Table 3
See Table 2 or Table 3
See Table 2 or Table 3
See Table 2 or Table 3
DI0
DI0
H
H
H
H
L
L
L
L
L
L
L
L
L
Assignment with A/DIN1 tied to MUXOUT1
DI1
DI1
CH0
H
H
X
L
L
L
L
L
L
L
L
L
L
Analog Channel Addressed and
+
−
+
and A/DIN2 tied to MUXOUT2
DI2
X
L
L
L
L
L
L
L
L
L
L
L
L
CONV
H
X
X
L
TABLE 3. ADC12130 and ADC12132* Multiplexer Addressing
TABLE 5. Conversion/Read Data Only Mode Programming
DI3
X
L
L
L
L
L
L
L
L
L
L
L
L
CH1
−
+
+
DI4
DI2
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
DI5
DI3
(Continued)
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
TABLE 4. Mode Programming
PD
H
L
L
L
COM
DI6
DI4
−
−
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
DI7
DI5
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
27
A/D Input Polarity
A/DIN1
Acquisition Time — 10 CCLK Cycles
Acquisition Time — 18 CCLK Cycles
Acquisition Time — 34 CCLK Cycles
(CH1–CH7 become Active Outputs)
Acquisition Time — 6 CCLK Cycles
Assignment
+
−
+
+
Read Only (Previous DO Format). No Conversion.
Data Out without Sign
Read Status Register
Data Out with Sign
12 Bit Conversion
12 Bit Conversion
12 Bit Conversion
12 Bit Conversion
A/DIN2
Mode Selected
Power Down
User Mode
Test Mode
−
+
−
−
Auto Zero
Power Up
(Current)
Auto Cal
See Table 4 for Mode
Power Down
MUXOUT1
Channel Assignment
Multiplexer Output
CH0
CH0
CH0
CH1
Mode
Idle
MUXOUT2
COM
COM
CH1
CH1
12 or 13 Bit MSB First
16 or 17 Bit MSB First
12 or 13 Bit LSB First
16 or 17 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
www.national.com
Differential
Mode