Datasheet

MAX1178/MAX1188
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
4 _______________________________________________________________________________________
TIMING CHARACTERISTICS (Figures 1 and 2)
(AV
DD
= +4.75V to +5.25V, DV
DD
= +2.7V to AV
DD
, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
,
C
LOAD
= 20pF, T
A
= T
MIN
to T
MAX
.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Maximum Sampling Rate f
SAMPLE-MAX
135 ksps
Acquisition Time t
ACQ
2µs
Conversion Time t
CONV
4.7 µs
CS Pulse-Width High t
CSH
(Note 2) 40 ns
DV
DD
= 4.75V to 5.25V 40
CS Pulse-Width Low (Note 2) t
CSL
DV
DD
= 2.7V to 5.25V 60
ns
R/C to CS Fall Setup Time t
DS
0ns
DV
DD
= 4.75V to 5.25V 40
R/C to CS Fall Hold Time t
DH
DV
DD
= 2.7V to 5.25V 60
ns
DV
DD
= 4.75V to 5.25V 40
CS to Output Data Valid t
DO
DV
DD
= 2.7V to 5.25V 80
ns
EOC Fall to CS Fall t
DV
0ns
DV
DD
= 4.75V to 5.25V 40
CS Rise to EOC Rise t
EOC
DV
DD
= 2.7V to 5.25V 80
ns
DV
DD
= 4.75V to 5.25V 40
Bus Relinquish Time t
BR
DV
DD
= 2.7V to 5.25V 80
ns
DV
DD
= 4.75V to 5.25V 40
HBEN Transition to Output Data
Valid
t
DO
1
DV
DD
= 2.7V to 5.25V 80
ns
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +5V ±5%, external reference = +4.096V, C
REF
= 10µF, C
REFADJ
= 0.1µF, V
REFADJ
= AV
DD
, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
POWER SUPPLIES
Analog Supply Voltage AV
DD
4.75 5.25
V
Digital Supply Voltage DV
DD
2.70 5.25
V
External reference, 135ksps 4 5.3
Analog Supply Current I
AVDD
Internal reference, 135ksps 5.2 6.2
mA
Shutdown mode (Note 1), digital input =
DV
DD
or 0V
0.5 5 µA
Shutdown Supply Current I
SHDN
Standby mode 3.7 mA
Digital Supply Current I
DVDD
0.75
mA
Power-Supply Rejection AV
DD
= DV
DD
= 4.75V to 5.25V 3.5 LSB
Note 1: Maximum specification is limited by automated test equipment.
Note 2: To ensure best performance, finish reading the data and wait t
BR
before starting a new acquisition.