MAX1221 datasheet(6/44 Pages) MAXIM

6 / 44 page

12-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 other-

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output-Voltage High

VOH

ISOURCE = 2mA

DVDD -

0.5

Tri-State Leakage Current

±10

µA

Tri-State Output Capacitance

COUT

DIGITAL OUTPUT (EOC) (Note 14)

Output-Voltage Low

VOL

ISINK = 2mA

0.4

Output-Voltage High

VOH

ISOURCE = 2mA

DVDD -

0.5

Tri-State Leakage Current

±10

µA

Tri-State Output Capacitance

COUT

DIGITAL OUTPUTS (GPIO_) (Note 14)

ISINK = 2mA

0.4

GPIOC_ Output-Voltage Low

ISINK = 4mA

0.8

GPIOC_ Output-Voltage High

ISOURCE = 2mA

DVDD -

0.5

GPIOA_ Output-Voltage Low

ISINK = 15mA

0.8

GPIOA_ Output-Voltage High

ISOURCE = 15mA

DVDD -

0.8

Tri-State Leakage Current

±10

µA

Tri-State Output Capacitance

COUT

POWER REQUIREMENTS (Note 15)

Digital Positive-Supply Voltage

DVDD

2.7

AVDD

Idle, all blocks shut down

0.2

µA

Digital Positive-Supply Current

DIDD

Only ADC on, external reference

Analog Positive-Supply Voltage

AVDD

2.70

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

4.0

REF1 Positive-Supply Rejection

PSRR

AVDD = 2.7V

-77

DAC Positive-Supply Rejection

PSRD

Output code = FFFhex,

AVDD = 2.7V to 5.25V

±0.1

±0.5

MAX1221 Datasheet(PDF) 6 Page - Maxim Integrated Products

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