Datasheet

MAX1020/MAX1022/MAX1057/MAX1058
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= 2.7V to 3.6V (MAX1057), external reference V
REF
= 2.5V (MAX1057), V
AVDD
= V
DVDD
= 4.75V to 5.25V
(MAX1020/MAX1022/MAX1058), external reference V
REF
= 4.096V (MAX1020/MAX1022/MAX1058), f
CLK
= 3.6MHz (50% duty cycle),
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= 3V (MAX1057), V
AVDD
= V
DVDD
= 5V
(MAX1020/MAX1022/MAX1058), T
A
= +25°C. Outputs are unloaded, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
REF
= 2.5V (MAX1057), f
SAMPLE
=
225ksps
25 80
V
REF
= 4.096V
(MAX1020/MAX1022/MAX1058),
f
SAMPLE
= 225ksps
40 80
REF1 Input Current (Note 9) I
REF1
Acquisition between conversions ±0.01 ±1
µA
V
REF
= 2.5V (MAX1057), f
SAMPLE
=
225ksps
25 80
V
REF
= 4.096V
(MAX1020/MAX1022/MAX1058),
f
SAMPLE
= 225ksps
40 80
REF2 Input Current I
REF2
Acquisition between conversions ±0.01 ±1
µA
DAC
DC ACCURACY (Note 10)
Resolution 10 Bits
Integral Nonlinearity INL ±0.5 ±1 LSB
Differential Nonlinearity DNL Guaranteed monotonic ±0.5 LSB
Offset Error V
OS
(Note 8) ±3 ±10 mV
Offset-Error Drift ±10
ppm of
FS/°C
Gain Error GE (Note 8) ±1.25 ±10 LSB
Gain Temperature Coefficient ±8
ppm of
FS/°C
DAC OUTPUT
No load 0.02
V
AVDD
-
0.02
Output-Voltage Range
10kΩ load to either rail 0.1
V
AVDD
-
0.1
V
DC Output Impedance 0.5 Ω
Capacitive Load (Note 11) 1 nF
V
AVDD
= 2.7V, V
REF
= 2.5V (MAX1057),
gain error < 1%
2000
Resistive Load to AGND R
L
V
AVDD
= 4.75V, V
REF
= 4.096V
(MAX1020/MAX1022/MAX1058),
gain error < 2%
500
Ω