參數(shù)資料
型號(hào): MAX127-MAX128
廠商: Maxim Integrated Products, Inc.
英文描述: Multirange, +5V, 12-Bit DAS with 2-Wire Serial Interface
中文描述: 多量程,5V的,12位DAS的2線串行接口
文件頁(yè)數(shù): 10/16頁(yè)
文件大?。?/td> 124K
代理商: MAX127-MAX128
M
Multirange, +5V, 12-Bit DAS with
2-Wire S erial Interfac e
10
______________________________________________________________________________________
BIT 7
(MSB)
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
(LSB)
START
SEL2
SEL1
SEL0
RNG
BIP
PD1
PD0
Table 1. Control-Byte Format
BIT
NAME
DESCRIPTION
7 (MSB)
START
The logic "1" received after acknowledge of a write bit (R/
W
= 0) defines the
beginning of the control byte.
6, 5, 4
SEL2, SEL1,
SEL0
These three bits select the desired "ON" channel
(Table 2)
.
3
2
RNG
BIP
Selects the full-scale input voltage range
(Table 3)
.
Selects unipolar or bipolar conversion mode
(Table 3)
.
These two bits select the power-down modes
(Table 4)
.
1, 0 (LSB)
PD1, PD0
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 2. Channel Selection
Table 3. Range and Polarity Selection
INPUT RANGE (V)
RNG
BIP
NEGATIVE FULL
SCALE (V)
ZERO
SCALE (V)
FULL SCALE (V)
0 to 5
0
0
0
V
REF
x 1.2207
V
REF
x 2.4414
V
REF
x 1.2207
0 to 10
1
0
0
±5
0
1
-V
REF
x 1.2207
0
±10
1
1
-V
REF
x 2.4414
0
V
REF
x 2.4414
Table 4. Power-Down and Clock
Selection
PD1
0
1
1
PD0
X
0
1
MODE
Normal Operation (always on)
Standby Power-Down Mode (STBYPD)
Full Power-Down Mode (FULLPD)
0 to V
REF
1
0
0
V
REF
±V
REF
/2
0
1
-V
REF
/2
0
V
REF
/2
±V
REF
1
1
-V
REF
0
V
REF
0 to V
REF
/2
0
0
0
V
REF
/2
MAX127
MAX128
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