MAX1221 datasheet(14/44 Pages) MAXIM

14 / 44 page

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

______________________________________________________________________________________

Typical Operating Characteristics (continued)

(AVDD = DVDD = 3V external VREF = 2.5V, fCLK = 3.6MHz (50% duty cycle), fSAMPLE = 225ksps, CLOAD = 50pF, 0.1µF capacitor at

REF, TA = +25°C, unless otherwise noted.)

DAC DIGITAL FEEDTHROUGH (RLOAD = 10k

Ω,

CLOAD = 100pF, CS = HIGH, DIN = LOW)

MAX1221 toc49

200ns/div

VOUT

100mV/div

AC-COUPLED

SCLK

2V/div

AVDD = DVDD = 5V

EXTERNAL REFERENCE = 4.096V

DYNAMIC RESPONSE FALL TIME

(RLOAD = 10k

Ω, CLOAD = 100pF)

MAX1221 toc44

μs/div

VOUT

1V/div

DYNAMIC RESPONSE FALL TIME

(RLOAD = 10k

Ω, CLOAD = 100pF)

MAX1221 toc45

μs/div

VOUT

2V/div

AVDD = DVDD = 5V

EXTERNAL REFERENCE = 4.096V

MAJOR CARRY TRANSITION

(RLOAD = 10k

Ω, CLOAD = 100pF)

MAX1221 toc46

μs/div

VOUT

10mV/div

AC-COUPLED

1V/div

MAJOR CARRY TRANSITION

(RLOAD = 10k

Ω, CLOAD = 100pF)

MAX1221 toc47

μs/div

VOUT

20mV/div

AC-COUPLED

2V/div

AVDD = DVDD = 5V

EXTERNAL REFERENCE = 4.096V

DAC DIGITAL FEEDTHROUGH (RLOAD = 10k

Ω,

CLOAD = 100pF, CS = HIGH, DIN = LOW)

MAX1221 toc48

200ns/div

VOUT

100mV/div

AC-COUPLED

SCLK

1V/div

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