MAX1220BETX datasheet(5/47 Pages) MAXIM

Part #	MAX1220BETX

Description	12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

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Manufacturer	MAXIM [Maxim Integrated Products]

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5 / 47 page

12-Bit, Multichannel ADCs/DACs with FIFO,

Temperature Sensing, and GPIO Ports

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5

ELECTRICAL CHARACTERISTICS (continued)

(AVDD = DVDD = 2.7V to 3.6V (MAX1257), external reference VREF = 2.5V (MAX1257), AVDD = 4.75V to 5.25V, DVDD = 2.7V to AVDD

(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 AVDD = DVDD = 3V (MAX1257), AVDD = DVDD = 5V (MAX1220/MAX1258), TA = +25°C.

Outputs are unloaded, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DYNAMIC PERFORMANCE (Notes 5, 13)

Output-Voltage Slew Rate

SR

Positive and negative

3

V/µs

Output-Voltage Settling Time

tS

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

2

5

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

4

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

MAX1257

2.482

2.5

2.518

REF1 Output Voltage (Note 8)

MAX1220/MAX1258

4.066

4.096

4.126

V

REF1 Temperature Coefficient

TCREF

±30

ppm/°C

VREF = 2.5V

0.39

REF1 Short-Circuit Current

VREF = 4.096V

0.63

mA

EXTERNAL-REFERENCE INPUT

REF1 Input Voltage Range

VREF1

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

0.7

AVDD

V

REF1 Input Impedance

RREF1

70

100

130

k

Ω

DIGITAL INTERFACE

DIGITAL INPUTS (SCLK, DIN,

CS, CNVST, LDAC)

Input-Voltage High

VIH

DVDD = 2.7V to 5.25V

2.4

V

DVDD = 3.6V to 5.25V

0.8

Input-Voltage Low

VIL

DVDD = 2.7V to 3.6V

0.6

V

Input Leakage Current

IL

±0.01

±10

µA

Input Capacitance

CIN

15

pF

DIGITAL OUTPUT (DOUT) (Note 14)

Output-Voltage Low

VOL

ISINK = 2mA

0.4

V

Output-Voltage High

VOH

ISOURCE = 2mA

DVDD -

0.5

V

Tri-State Leakage Current

±10

µA

Tri-State Output Capacitance

COUT

15

pF

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