 English |
|
|
|
|
|
|
|
| MAX1270BCAI Datasheet, PDF (11/20 Pages) Maxim Integrated Products – Multirange, +5V, 8-Channel, Serial 12-Bit ADCs | |||
| |||
| ◁ |
Multirange, +5V, 8-Channel,
Serial 12-Bit ADCs
Table 1. Control-Byte Format
BIT 7
(MSB)
START
BIT 6
SEL2
BIT 5
SEL1
BIT 4
SEL0
BIT 3
RNG
BIT 2
BIP
BIT 1
PD1
BIT
7 (MSB)
6, 5, 4
3
2
1, 0 (LSB)
NAME
START
SEL2, SEL1,
SEL0
RNG
BIP
PD1, PD0
DESCRIPTION
First logic 1 after CS goes low defines the beginning of the control byte.
These 3 bits select the desired âonâ channel (Table 2).
Selects the full-scale input voltage range (Table 3).
Selects the unipolar or bipolar conversion mode (Table 3).
Select clock and power-down modes (Table 4).
BIT 0
(LSB)
PD0
Table 2. Channel Selection
SEL2
0
0
0
0
1
1
1
1
SEL1
0
0
1
1
0
0
1
1
SEL0
0
1
0
1
0
1
0
1
CHANNEL
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
Table 4. Power-Down and Clock Selection
PD1 PD0
MODE
0
0 Normal operation (always on), internal clock
mode.
0
1 Normal operation (always on), external clock
mode.
1
0
Standby power-down mode (STBYPD), clock
mode unaffected.
1
1
Full power-down mode (FULLPD), clock mode
unaffected.
Table 3. Range and Polarity Selection for MAX1270/MAX1271
RANGE AND POLARITY SELECTION FOR THE MAX1270
INPUT RANGE
RNG
BIP
Negative
FULL SCALE
0 to +5V
0
0
â
0 to +10V
1
0
â
±5V
0
1
-VREF x 1.2207
±10V
1
1
-VREF x 2.4414
RANGE AND POLARITY SELECTION FOR THE MAX1271
INPUT RANGE
RNG
BIP
Negative
FULL SCALE
0 to VREF/2
0 to VREF
±VREF/2
±VREF
0
0
1
0
0
1
1
1
â
â
-VREF/2
-VREF
ZERO
SCALE (V)
0
0
0
0
ZERO
SCALE (V)
0
0
0
0
FULL SCALE
VREF x 1.2207
VREF x 2.4414
VREF x 1.2207
VREF x 2.4414
FULL SCALE
VREF/2
VREF
VREF/2
VREF
______________________________________________________________________________________ 11
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese