Datasheet

MAX192
Low-Power, 8-Channel,
Serial 10-Bit ADC
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 5V ±5%, f
CLK
= 2.0MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (133ksps), 4.7µF capacitor at VREF pin,
T
A
= T
MIN
to T
MAX,
unless otherwise noted. Typical values are at T
A
= +25°C.)
Internal compensation
0mA to 0.5mA output load
T
A
= +25°C (Note 7)
(Note 5)
On/off leakage current; V
IN
= 0V, 5V
Bipolar
Used for data transfer only
Internal compensation (Note 5)
External compensation, 4.7µF
Single-ended range (unipolar only)
Common-mode range (any input)
CONDITIONS
0
mV2.5Load Regulation (Note 8)
ppm/°C±30VREF Tempco
mA30VREF Short-Circuit Current
V4.066 4.096 4.126VREF Output Voltage
pF16Input Capacitance
µA±0.01 ±1Multiplexer Leakage Current
V
-V
REF
+V
REF
-2 2
Analog Input Voltage
(Note 6)
0 V
REF
0 V
REF
0 V
DD
MHz
10
External Clock Frequency
0.1 0.4
0.1 2.0
UNITSMIN TYP MAXSYMBOLPARAMETER
Capacitive Bypass at VREF
External compensation 4.7
µF
Internal compensation 0.01
Capacitive Bypass at REFADJ
External compensation 0.01
µF
REFADJ Adjustment Range ±1.5 %
Input Voltage Range
2.5
V
DD
+
50mV
V
Input Current 200 350 µA
Input Resistance 12 20 kΩ
Shutdown VREF Input Current 1.5 10 µA
Buffer Disable Threshold
REFADJ
V
DD
-
50mV
V
Unipolar
Differential range
Internal compensation mode 0
Capacitive Bypass at VREF
External compensation mode 4.7
µF
Reference-Buffer Gain 1.678 V/V
REFADJ Input Current ±50 µA
ANALOG INPUT
INTERNAL REFERENCE (reference buffer enabled)
EXTERNAL REFERENCE AT VREF (buffer disabled, VREF = 4.096V)
EXTERNAL REFERENCE AT REFADJ