MAX1258 datasheet(6/43 Pages) MAXIM

6 / 43 page

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VAVDD = VDVDD = 2.7V to 3.6V (MAX1257), external reference VREF = 2.5V (MAX1257), VAVDD = 4.75V to 5.25V, VDVDD = 2.7V to VAVDD

(MAX1220/MAX1258), external reference VREF = 4.096V (MAX1220/MAX1258), fCLK = 3.6MHz (50% duty cycle), TA = -40°C to +85°C,

unless otherwise noted. Typical values are at VAVDD = VDVDD = 3V (MAX1257), VAVDD = VDVDD = 5V (MAX1220/MAX1258), TA = +25°C.

Outputs are unloaded, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL OUTPUT (

EOC) (Note 14)

Output-Voltage Low

VOL

ISINK = 2mA

0.4

Output-Voltage High

VOH

ISOURCE = 2mA

VDVDD -

0.5

Three-State Leakage Current

±10

µA

Three-State Output

Capacitance

COUT

DIGITAL OUTPUTS (GPIO_) (Note 14)

ISINK = 2mA

0.4

GPIOB_, GPIOC_ Output-

Voltage Low

ISINK = 4mA

0.8

GPIOB_, GPIOC_ Output-

Voltage High

ISOURCE = 2mA

VDVDD -

0.5

GPIOA_ Output-Voltage Low

ISINK = 15mA

0.8

GPIOA_ Output-Voltage High

ISOURCE = 15mA

VDVDD -

0.8

Three-State Leakage Current

±10

µA

Three-State Output

Capacitance

COUT

POWER REQUIREMENTS (Note 15)

Digital Positive-Supply Voltage

DVDD

2.7

VAVDD

Idle, all blocks shut down

0.2

µA

Digital Positive-Supply Current

DIDD

Only ADC on, external reference

MAX1257

2.7

3.6

Analog Positive-Supply Voltage

AVDD

MAX1220/MAX1258

4.75

5.25

Idle, all blocks shut down

0.2

µA

fSAMPLE = 225ksps

2.8

4.2

Only ADC on,

external reference fSAMPLE = 100ksps

2.6

Analog Positive-Supply Current

AIDD

All DACs on, no load, internal reference

1.5

MAX1257, VAVDD = 2.7V

-77

REF1 Positive-Supply

Rejection

PSRR

MAX1220/MAX1258, VAVDD = 4.75V

-80

MAX1257, VAVDD = 2.7V to

±0.1

±0.5

DAC Positive-Supply Rejection

PSRD

Output

code =

FFFhex

MAX1220/MAX1258,

VAVDD = 4.75V to 5.25V

±0.1

±0.5

MAX1257, VAVDD = 2.7V to

±0.06

±0.5

ADC Positive-Supply Rejection

PSRA

Full-

scale

input

MAX1220/MAX1258,

VAVDD = 4.75V to 5.25V

±0.06

±0.5

MAX1258 Datasheet(PDF) 6 Page - Maxim Integrated Products

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