Datasheet

MAX1132/MAX1133
16-Bit ADC, 200ksps, 5V Single-Supply
with Reference
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +5V ±5%, f
SCLK
= 4.8MHz, external clock (50% duty cycle), 24 clocks/conversion (200ksps), bipolar input, external
V
REF
= +4.096V, V
REFADJ
= AV
DD
, C
REF
= 2.2µF, C
CREF
= 1µF, 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
Capacitive Bypass at REF 0.47 10 µF
Maximum Capacitive Bypass at
REFADJ
10 µF
REFADJ Output Voltage 4.096 V
REFADJ Input Range For small adjustments from 4.096V ±100 mV
REFADJ Buffer Disable
Threshold
To power-down the internal reference
AV
D D
-
0.5V
AV
D D
-
0.1V
V
Buffer Voltage Gain 1 V/V
EXTERNAL REFERENCE (Reference buffer disabled. Reference applied to REF)
Input Range (Notes 5 and 6) 3.0 4.096 4.2 V
V
REF
= 4.096V, f
SCLK
= 4.8MHz 250
V
REF
= 4.096V, f
SCLK
= 0 230Input Current
In power-down, f
SCLK
= 0 0.1
µA
DIGITAL INPUTS
Input High Voltage V
IH
2.4 V
Input Low Voltage V
IL
0.8 V
Input Leakage I
IN
V
IN
= 0 or DV
DD
±1 µA
Input Hysteresis V
HYST
0.2 V
Input Capacitance C
IN
10 pF
DIGITAL OUTPUTS
Output High Voltage V
OH
I
SOURCE
= 0.5mA
DV
DD
-
0.5
V
I
SINK
= 5mA 0.4
Output Low Voltage V
OL
I
SINK
= 16mA 0.8
V
Three-State Leakage Current I
L
CS = DV
DD
±10 µA
Three-State Output
Capacitance
CS = DV
DD
10 pF
POWER SUPPLIES
Analog Supply (Note 7) AV
DD
4.75 5 5.25 V
Digital Supply (Note 7) DV
DD
4.75 5 5.25 V
Unipolar mode 5 8
Bipolar mode 8.5 11
mA
Analog Supply Current I
ANALOG
SHDN = 0, or softw are power -down mode
0.3 10 µA
Unipolar or bipolar mode 2.5 3.5 mA
Digital Supply Current I
DIGITAL
SHDN = 0, or softw are power -down mode
2.2 10 µA
Power-Supply Rejection Ratio
(Note 8)
PSRR AV
DD
= DV
DD
= 4.75V to 5.25V 72 dB