Datasheet

MAX1020/MAX1022/MAX1057/MAX1058
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
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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
Acquisition Time t
ACQ
(Note 5) 0.6 µs
Internally clocked 5.5
Conversion Time t
CONV
Externally clocked 3.6
µs
External Clock Frequency f
CLK
Externally clocked conversion (Note 5) 0.1 3.6 MHz
Duty Cycle 40 60 %
Aperture Delay 30 ns
Aperture Jitter < 50 ps
ANALOG INPUTS
Unipolar 0 V
REF
Input Voltage Range (Note 6)
Bipolar -V
REF
/ 2 V
REF
/ 2
V
Input Leakage Current ±0.01 ±1 µA
Input Capacitance 24 pF
INTERNAL TEMPERATURE SENSOR
T
A
= +25°C ±0.7
Measurement Error (Notes 5, 7)
T
A
= T
MIN
to T
MAX
±1.0 ±3.0
°C
Temperature Resolution 1/8 °C/LSB
INTERNAL REFERENCE
MAX1057 2.482 2.50 2.518
REF1 Output Voltage (Note 8)
MAX1020/MAX1022/MAX1058 4.066 4.096 4.126
V
REF1 Voltage Temperature
Coefficient
TC
REF
±30 ppm/°C
REF1 Output Impedance 6.5 kΩ
V
REF
= 2.5V 0.39
REF1 Short-Circuit Current
V
REF
= 4.096V 0.63
mA
EXTERNAL REFERENCE
REF1 Input Voltage Range V
REF1
REF mode 11 (Note 4) 1
V
AVDD
+ 0.05
V
REF mode 01 1
V
AVDD
+ 0.05
REF2 Input Voltage Range
(Note 4)
V
REF2
REF mode 11 0 1
V