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MAX1261 Datasheet, PDF (3/20 Pages) Maxim Integrated Products – 250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
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250ksps, +3V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
ELECTRICAL CHARACTERISTICS (continued)
(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty
cycle); TA = TMIN to TMAX unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
ANALOG INPUTS
Analog Input Voltage Range,
Single Ended and Differential
(Note 6)
Unipolar, VCOM = 0
VIN
Bipolar, VCOM = VREF / 2
0
-VREF/2
VREF
V
+VREF/2
Multiplexer Leakage Current
On-/off-leakage current, VIN = 0 or VDD
±0.01 ±1
µA
Input Capacitance
CIN
INTERNAL REFERENCE
12
pF
REF Output Voltage
2.49
2.5
2.51
V
REF Short-Circuit Current
15
mA
REF Temperature Coefficient
REFADJ Input Range
TCREF
TA = 0°C to +70°C
For small adjustments
±20
±100
ppm/°C
mV
REFADJ High Threshold
Load Regulation
To power down the internal reference
0 to 0.5mA output load (Note 7)
VDD - 1.0
0.2
V
mV/mA
Capacitive Bypass at REFADJ
0.01
1
µF
Capacitive Bypass at REF
4.7
10
µF
EXTERNAL REFERENCE AT REF
REF Input Voltage Range
VREF
1.0
VDD +
50mV
V
REF Input Current
IREF
VREF = 2.5V, fSAMPLE = 250ksps
Shutdown mode
200
300
µA
2
DIGITAL INPUTS AND OUTPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
Output Low Voltage
Output High Voltage
Tri-State Leakage Current
Tri-State Output Capacitance
VIH
VIL
VHYS
IIN
CIN
VOL
VOH
ILEAKAGE
COUT
VLOGIC = 2.7V
VLOGIC = 1.8V
VLOGIC = 2.7V
VLOGIC = 1.8V
VIN = 0 or VDD
ISINK = 1.6mA
ISOURCE = 1mA
CS = VDD
CS = VDD
2.0
V
1.5
0.8
V
0.5
200
mV
±0.1
±1
µA
15
pF
0.4
V
VLOGIC - 0.5
V
±0.1
±1
µA
15
pF
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