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| MAX1236 Datasheet, PDF (4/22 Pages) Maxim Integrated Products – 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs | |||
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2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 2.7V to 3.6V (MAX1237/MAX1239), VDD = 4.5V to 5.5V (MAX1236/MAX1238), VREF = 2.048V (MAX1237/MAX1239), VREF =
4.096V (MAX1236/MAX1238), CREF = 0.1µF, fSCL = 1.7MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C, see Tables 1â5 for programming notation.)
PARAMETER
POWER REQUIREMENTS
Supply Voltage
Supply Current
Power-Supply Rejection Ratio
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VDD
IDD
PSRR
MAX1237/MAX1239
MAX1236/MAX1238
fSAMPLE = 94.4ksps
external clock
Internal reference
External reference
fSAMPLE = 40ksps
internal clock
Internal reference
External reference
fSAMPLE = 10ksps
internal clock
Internal reference
External reference
fSAMPLE =1ksps
internal clock
Internal reference
External reference
Shutdown (internal REF off)
Full-scale input (Note 9)
2.7
3.6
V
4.5
5.5
900 1150
670 900
530
230
380
µA
60
330
6
0.5
10
±0.5 ±0.2 LSB/V
TIMING CHARACTERISTICS (Figure 1)
(VDD = 2.7V to 3.6V (MAX1237/MAX1239), VDD = 4.5V to 5.5V (MAX1236/MAX1238), VREF = 2.048V (MAX1237/MAX1239), VREF =
4.096V (MAX1236/MAX1238), CREF = 0.1µF, fSCL = 1.7MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C, see Tables 1â5 for programming notation.)
PARAMETER
SYMBOL
TIMING CHARACTERISTICS FOR FAST MODE
CONDITIONS
Serial-Clock Frequency
fSCL
Bus Free Time Between a STOP (P)
and a START (S) Condition
tBUF
Hold Time for START (S) Condition
Low Period of the SCL Clock
High Period of the SCL Clock
Setup Time for a Repeated START
Condition (Sr)
tHD, STA
tLOW
tHIGH
tSU, STA
Data Hold Time (Note 10)
Data Setup Time
tHD, DAT
tSU, DAT
Rise Time of Both SDA and SCL
Signals, Receiving
tR
Measured from 0.3VDD - 0.7VDD
Fall Time of SDA Transmitting
Setup Time for STOP (P) Condition
Capacitive Load for Each Bus Line
Pulse Width of Spike Suppressed
tF
tSU, STO
CB
tSP
Measured from 0.3VDD - 0.7VDD
MIN TYP MAX UNITS
1.3
0.6
1.3
0.6
0.6
0
100
20 + 0.1CB
20 + 0.1CB
0.6
400
kHz
µs
µs
µs
µs
µs
900
ns
ns
300
ns
300
ns
µs
400
pF
50
ns
4 _______________________________________________________________________________________
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