MAX1021 datasheet(3/40 Pages) MAXIM

3 / 40 page

10-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 5.25V, external reference VREF = 2.5V, fCLK = 3.6MHz (50% duty cycle), TA = -40°C to +85°C, unless

otherwise noted. Typical values are at AVDD = DVDD = 3V, TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Acquisition Time

tACQ

(Note 5)

0.6

µs

Internally clocked

5.5

Conversion Time

tCONV

Externally clocked

3.6

µs

External Clock Frequency

fCLK

Externally clocked conversion (Note 5)

0.1

3.6

MHz

Duty Cycle

Aperture Delay

Aperture Jitter

< 50

ANALOG INPUTS

Unipolar

VREF

Input Voltage Range (Note 6)

Bipolar

-VREF / 2

+VREF / 2

Input Leakage Current

±0.01

±1

µA

Input Capacitance

INTERNAL TEMPERATURE SENSOR

TA = +25°C

±0.7

Measurement Error (Notes 5, 7)

TA = TMIN to TMAX

±1.0

±3.0

°C

Temperature Resolution

1/8

°C/LSB

INTERNAL REFERENCE

REF1 Output Voltage

(Note 8)

2.482

2.50

2.518

REF1 Voltage Temperature

Coefficient

TCREF

±30

ppm/°C

REF1 Output Impedance

6.5

REF1 Short-Circuit Current

VREF = 2.5V

0.39

EXTERNAL REFERENCE

REF1 Input Voltage Range

VREF1

REF mode 11 (Note 4)

AVDD +

0.05

REF mode 01

AVDD +

0.05

REF2 Input Voltage Range

(Note 4)

VREF2

REF mode 11

VREF = 2.5V, fSAMPLE = 225ksps

REF1 Input Current (Note 9)

IREF1

Acquisition between conversions

±0.01

±1

µA

VREF = 2.5V, fSAMPLE = 225ksps

REF2 Input Current

IREF2

Acquisition between conversions

±0.01

±1

µA

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