MAX128AEAI Maxim Integrated, MAX128AEAI Datasheet - Page 10

• Manufacturer Part Number: MAX128AEAI
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX128AEAI

• Number Of Channels: 8
• Architecture: SAR
• Conversion Rate: 8 KSPs
• Resolution: 12 bit
• Input Type: Single-Ended
• Snr: Yes
• Interface Type: I2C, Serial
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Package / Case: SSOP-28
• Maximum Power Dissipation: 762 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

Multirange, +5V, 12-Bit DAS with
2-Wire Serial Interface
Table 1. Control-Byte Format
Table 2. Channel Selection
Table 3. Range and Polarity Selection
10
MAX128
MAX127
1, 0 (LSB)
7 (MSB)
START
(MSB)
SEL2
6, 5, 4
BIT 7
______________________________________________________________________________________
BIT
0
0
0
0
1
1
1
1
3
2
INPUT RANGE (V)
0 to V
0 to V
±V
0 to 10
±V
0 to 5
±10
±5
REF
REF
REF
REF
SEL2, SEL1,
/2
PD1, PD0
/2
SEL1
START
NAME
BIT 6
SEL2
SEL0
RNG
BIP
0
0
1
1
0
0
1
1
The logic "1" received after acknowledge of a write bit (R/W = 0) defines the
beginning of the control byte.
These three bits select the desired "ON" channel (Table 2).
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).
SEL0
RNG
BIT 5
SEL1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
BIP
0
0
1
1
0
0
1
1
CHANNEL
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
BIT 4
SEL0
NEGATIVE FULL
-V
-V
SCALE (V)
REF
REF
-V
-V
REF
x 1.2207
x 2.4414
–
–
–
–
REF
Table 4. Power-Down and Clock
Selection
/2
PD1
BIT 3
RNG
0
1
1
DESCRIPTION
PD0
X
0
1
SCALE (V)
Normal Operation (always on)
Standby Power-Down Mode (STBYPD)
Full Power-Down Mode (FULLPD)
ZERO
BIT 2
BIP
0
0
0
0
0
0
0
0
BIT 1
MODE
PD1
FULL SCALE (V)
V
V
V
V
REF
REF
REF
REF
V
V
V
V
REF
REF
x 1.2207
x 2.4414
x 1.2207
x 2.4414
REF
REF
/2
/2
(LSB)
BIT 0
PD0