MAX1112 Datasheet, PDF (3/20 Pages) Maxim Integrated Products – 5V, Low-Power, Multi-Channel, Serial 8-Bit ADCs Internal 4.096V Reference

+5V, Low-Power, Multi-Channel,
Serial 8-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(V_DD = 4.5V to 5.5V; unipolar input mode; V_COM = 0V; f_SCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion cycle
(50ksps); 1µF capacitor at REFOUT; T_A = T_MIN to T_MAX; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
CONVERSION RATE
Conversion Time (Note 4)
Internal clock
t_{CONV External clock, 500kHz, 10 clocks/conversion 20}
Track/Hold Acquisition Time
t_ACQ External clock, 2MHz
1
Aperture Delay
Aperture Jitter
Internal Clock Frequency
(Note 5)
50
External Clock-Frequency Range
Used for data transfer only
ANALOG INPUT
Unipolar input, V_COM = 0V
0
Input Voltage Range, Single-
Ended and Differential (Note 6)
Bipolar input, V_COM = V_REFIN/2
TYP MAX UNITS
25
55
µs
µs
10
ns
< 50
ps
400
kHz
500 kHz
2
MHz
V_REFIN
COM ±
V
V_REFIN/2
Multiplexer Leakage Current
Input Capacitance
INTERNAL REFERENCE
REFOUT Voltage
REFOUT Short-Circuit Current
REFOUT Temperature Coefficient
Load Regulation (Note 7)
Capacitive Bypass at REFOUT
EXTERNAL REFERENCE AT REFIN
On/off leakage current, V_{CH_} = 0V or V_DD
±0.01 ±1
µA
18
pF
0 to 0.5mA output load
3.936
1
4.096
6
±50
4.5
4.256
V
mA
ppm/°C
mV
µF
Input Voltage Range
1
V_DD +
50
V
Input Current
POWER REQUIREMENTS
Supply Voltage
Supply Current
(Note 8)
V_DD
Full-scale input
C_LOAD = 10pF
I_DD
Power-down
1
20
µA
4.5
5.5
V
Operating mode
135
250
Reference disabled
95
µA
µA
Software
2
SHDN at DGND
3.2
10
Power-Supply Rejection
(Note 9)
PSR
V_DD = 4.5V to 5.5V; external reference,
4.096V; full-scale input
±0.4
±4
mV
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