Datasheet
I
DD
MAX1294/MAX1296
420ksps, +5V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V ±10%, COM = GND, REFADJ = V
DD
, V
REF
= +2.5V, 4.7µF capacitor at REF pin, f
CLK
= 7.6MHz (50% duty cycle),
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
Shutdown mode
V
REF
= 2.5V, f
SAMPLE
= 420ksps
0 to 0.5mA output load
To power down the internal reference
For small adjustments
On/off-leakage current, V
IN
= 0 or V
DD
Unipolar, V
COM
= 0
Bipolar, V
COM
= V
REF
/ 2
2
µA
200 300
I
REF
V
1.0
V
DD
+
50mV
V
REF
REF Input Voltage Range
µF
4.7 10
Capacitive Bypass at REF
µF
0.01 1
Capacitive Bypass at REFADJ
mV/mA
0.2
Load Regulation (Note 7)
V
V
DD
- 1
REFADJ High Threshold
mV
±100
REFADJ Input Range
ppm/°C
±20
TC
REF
REF Temperature Coefficient
mA
15
REF Short-Circuit Current
V
2.49 2.5 2.51
REF Output Voltage
pF
12
C
IN
Input Capacitance
µA
±0.01 ±1
Multiplexer Leakage Current
V
0 V
REF
V
IN
Analog Input Voltage Range
Single-Ended and Differential
(Note 6)
-V
REF
/2 +V
REF
/2
CS = V
DD
I
SOURCE
= 1mA
I
SINK
= 1.6mA
V
IN
= 0 or V
DD
µA
±0.1 ±1
I
LEAKAGE
Three-State Leakage Current
V
V
DD
- 0.5
V
OH
Output Voltage High
V
0.4
V
OL
Output Voltage Low
pF
15
C
IN
Input Capacitance
µA
±0.1 ±1
I
IN
Input Leakage Current
mV
200
V
HYS
Input Hysteresis
V
0.8
V
IL
Input Voltage Low
V
4.0
V
IH
Input Voltage High
CS = V
DD
V
4.5 5.5
V
DD
Analog Supply Voltage
pF
15
C
OUT
Three-State Output Capacitance
3.3 3.6
REF Input Current
µA
External reference
2.8 3.1
External reference
0.5 0.8
mA
Internal reference
1.0 1.2
Power-Supply Rejection PSR V
DD
= 5V ±10%, full-scale input
±0.3 ±0.9
mV
Positive Supply Current I
DD
Shutdown mode
210
µA
ANALOG INPUTS
INTERNAL REFERENCE
EXTERNAL REFERENCE AT REF
DIGITAL INPUTS AND OUTPUTS
POWER REQUIREMENTS
Internal reference
Operating mode,
f
SAMPLE
= 420ksps
Standby mode