MAX1021 datasheet(5/47 Pages) MAXIM

5 / 47 page

10-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

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ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1021/MAX1023/MAX1057), external reference VREF = 2.5V (MAX1021/MAX1023/MAX1057), AVDD =

DVDD = 4.75V to 5.25V (MAX1020/MAX1022/MAX1058), external reference VREF = 4.096V (MAX1020/MAX1022/MAX1058), fSCLK = 4.8MHz

(50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at AVDD = DVDD = 3V (MAX1021/MAX1023/MAX1057),

AVDD = DVDD = 5V (MAX1020/MAX1022/MAX1058), TA = +25°C. Outputs are unloaded, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

From power-down mode, AVDD = 5V

Wake-Up Time (Note 12)

From power-down mode, AVDD = 2.7V

µs

Ω Output Termination

Programmed in power-down mode

Ω

100k

Ω Output Termination

At wake-up or programmed in

power-down mode

100

Ω

DYNAMIC PERFORMANCE (Notes 5, 13)

Output-Voltage Slew Rate

Positive and negative

V/µs

Output-Voltage Settling Time

To 1 LSB, 400 - C00 hex (Note 7)

µs

Digital Feedthrough

Code 0, all digital inputs from 0 to DVDD

0.5

nV•s

Major Code Transition Glitch

Impulse

Between codes 2047 and 2048

nV•s

From VREF

660

Output Noise (0.1Hz to 50MHz)

Using internal reference

720

µVP-P

From VREF

260

Output Noise (0.1Hz to 500kHz)

Using internal reference

320

µVP-P

DAC-to-DAC Transition

Crosstalk

0.5

nV•s

INTERNAL REFERENCE

MAX1021/MAX1023/MAX1057

2.482

2.50

2.518

REF1 Output Voltage (Note 8)

MAX1020/MAX1022/MAX1058

4.066

4.096

4.126

REF1 Temperature Coefficient

TCREF

±30

ppm/°C

VREF = 2.5V

0.39

REF1 Short-Circuit Current

VREF = 4.096V

0.63

EXTERNAL-REFERENCE INPUT

REF1 Input Voltage Range

VREF1

REF modes 01, 10, and 11 (Note 4)

0.7

AVDD

REF1 Input Impedance

RREF1

100

130

Ω

DIGITAL INTERFACE

DIGITAL INPUTS (SCLK, DIN, CS, CNVST, LDAC)

Input-Voltage High

VIH

DVDD = 2.7V to 5.25V

2.4

DVDD = 3.6V to 5.25V

0.8

Input-Voltage Low

VIL

DVDD = 2.7V to 3.6V

0.6

Input Leakage Current

±0.01

±10

µA

Input Capacitance

CIN

DIGITAL OUTPUT (DOUT) (Note 14)

Output-Voltage Low

VOL

ISINK = 2mA

0.4

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