MAX1280 Maxim, MAX1280 Datasheet - Page 5

• Manufacturer Part Number: MAX1280
• Description: MAX1280 Evaluation System
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS—MAX1281 (continued)
(V
+2.5V at REF, REFADJ = V
400ksps/300ksps, Single-Supply, Low-Power, 8-Channel,
CONVERSION RATE
ANALOG INPUTS (CH7–CH0, COM)
INTERNAL REFERENCE
EXTERNAL REFERENCE (Reference buffer disabled, reference applied to REF)
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)
Conversion Time (Note 5)
Track/Hold Acquisition Time
Aperture Delay
Aperture Jitter
Serial Clock Frequency
Duty Cycle
Input Voltage Range, Single-
Ended and Differential (Note 6)
Multiplexer Leakage Current
Input Capacitance
REF Output Voltage
REF Short-Circuit Current
REF Output Temperature
Coefficient
Load Regulation (Note 7)
Capacitive Bypass at REF
Capacitive Bypass at REFADJ
REFADJ Output Voltage
REFADJ Input Range
REFADJ Buffer Disable
Threshold
Buffer Voltage Gain
REF Input Voltage Range
REF Input Current
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage
Input Capacitance
DD1
= V
PARAMETER
DD2
= +2.7V to +3.6V, COM = GND, f
_______________________________________________________________________________________
DD1
, T
Serial 12-Bit ADCs with Internal Reference
A
= T
SYMBOL
TC V
V
t
f
V
V
CONV
t
V
SCLK
V
MIN
ACQ
HYST
C
I
CH_
REF
INH
INL
IN
IN
REF
to T
MAX
Normal operating mode
Normal operating mode
Normal operating mode
Unipolar, V
Bipolar, V
referenced to COM or CH_
On/off leakage current, V
T
0 to 0.75mA output load
For small adjustments, from 1.22V
To power down the internal reference
(Note 8)
V
V
In power-down, f
V
A
REF
REF
IN
, unless otherwise noted. Typical values are at T
SCLK
= +25°C
= 0 or V
= 2.500V, f
= 2.500V, f
= 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), external
COM
COM
DD2
or V
CONDITIONS
= 0
SCLK
SCLK
SCLK
CH_
= 4.8MHz
= 0
= 0
= V
CH_
REF
= 0 or AV
/2,
DD
2.480
0.01
MIN
A
3.3
0.5
4.7
1.4
1.0
2.0
40
= +25°C.)
±0.001
2.500
±100
TYP
1.22
2.05
<50
±15
200
18
0.1
0.2
10
15
15
V
±V
V
2.520
DD1
50mV
V
DD1
350
320
2.0
0.8
±1
±1
REF
10
10
REF
MAX
625
4.8
5
60
- 1
/2
+
ppm/°C
mV/mA
UNITS
MHz
mA
mV
V/V
ps
µA
pF
µF
µF
µA
µA
pF
µs
ns
ns
%
V
V
V
V
V
V
V
V
5