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MAX1157 Datasheet, PDF (4/15 Pages) Maxim Integrated Products – 14-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
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14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ = 0.1µF, VREFADJ = AVDD, TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
POWER SUPPLIES
Analog Supply Voltage
Digital Supply Voltage
Analog Supply Current
AVDD
4.75
5.25
V
DVDD
2.70
5.25
V
External reference, MAX1157
2.9
IAVDD
135ksps
Internal reference,
MAX1159/MAX1175
MAX1157
4.0
5.3
mA
3.8
135ksps
MAX1159/MAX1175
5.2
6.2
Shutdown Supply Current
ISHDN
Shutdown mode (Note 1), digital input =
DVDD or 0V
Standby mode
0.5
5
µA
3.7
mA
Digital Supply Current
Power-Supply Rejection
IDVDD
AVDD = DVDD = +4.75V to +5.25V
0.75
mA
1
LSB
TIMING CHARACTERISTICS (Figures 1 and 2)
(AVDD = +4.75V to +5.25V, DVDD = +2.7V to AVDD, external reference = +4.096V, CREF = 10µF, CREFADJ = 0.1µF, VREFADJ = AVDD,
CLOAD = 20pF, TA = TMIN to TMAX.)
PARAMETER
Maximum Sampling Rate
Acquisition Time
Conversion Time
CS Pulse Width High
CS Pulse Width Low
R/C to CS Fall Setup Time
R/C to CS Fall Hold Time
CS to Output Data Valid
EOC Fall to CS Fall
CS Rise to EOC Rise
Bus Relinquish Time
SYMBOL
CONDITIONS
MIN
fSAMPLE-MAX
tACQ
2
tCONV
tCSH
(Note 2)
40
tCSL
(Note 2)
DVDD = +4.75V to +5.25V 40
DVDD = +2.7V to +5.25V
60
tDS
0
tDH
DVDD = +4.75V to +5.25V
DVDD = +2.7V to +5.25V
40
60
tDO
DVDD = +4.75V to +5.25V
DVDD = +2.7V to +5.25V
tDV
0
tEOC
DVDD = +4.75V to +5.25V
DVDD = +2.7V to +5.25V
tBR
DVDD = +4.75V to +5.25V
DVDD = +2.7V to +5.25V
TYP MAX UNITS
135 ksps
µs
4.7
µs
ns
ns
ns
ns
40
ns
80
ns
40
ns
80
40
ns
80
Note 1: Maximum specification is limited by automated test equipment.
Note 2: To ensure best performance, finish reading the data and wait tBR before starting a new acquisition.
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