MAX1291ACEI datasheet(4/20 Pages) MAXIM

Part #	MAX1291ACEI

Description	250ksps, 3V, 8-/4-Channel, 12-Bit ADCs with 2.5V Reference and Parallel Interface

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Manufacturer	MAXIM [Maxim Integrated Products]

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4 / 20 page

250ksps, +3V, 8-/4-Channel, 12-Bit ADCs

with +2.5V Reference and Parallel Interface

4

_______________________________________________________________________________________

TIMING CHARACTERISTICS

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty

cycle); TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

CONDITIONS

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

Shutdown mode

Standby mode

Operating mode,

fSAMPLE = 250ksps

µA

210

0.9

1.2

mA

2.3

2.6

V

2.7

3.6

VDD

Analog Supply Voltage

150

ELECTRICAL CHARACTERISTICS (continued)

(VDD = VLOGIC = +2.7V to +3.6V, COM = GND, REFADJ = VDD, VREF = +2.5V, 4.7µF capacitor at REF pin, fCLK = 4.8MHz (50% duty

cycle); TA = TMIN to TMAX unless otherwise noted. Typical values are at TA = +25°C.)

VLOGIC Current

ILOGIC

CL = 20pF

210

µA

Power-Supply Rejection

PSR

VDD = 3V ±10%, full-scale input

±0.4

±0.7

mV

fSAMPLE = 250ksps

Not converting

V

1.8

VDD +

0.3

VLOGIC

Digital Supply Voltage

WR to CLK Fall Setup Time

tCWS

40

ns

CLK Pulse Width High

ns

CLK Period

tCH

40

tCP

208

CLK Pulse Width Low

tCL

40

ns

Data Valid to WR Rise Time

tDS

40

ns

WR Rise to Data Valid Hold Time

tDH

0

ns

CLK Fall to WR Hold Time

tCWH

40

ns

CS to CLK or WR

Setup Time

tCSWS

60

ns

CLK or WR to CS

Hold Time

tCSWH

0

ns

CS Pulse Width

tCS

100

ns

WR Pulse Width (Note 8)

tWR

60

ns

tTC

20

100

ns

CLOAD = 20pF, Figure 1

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

CONDITIONS

CS Rise to Output Disable

POWER REQUIREMENTS

Internal reference

External reference

1.9

2.3

0.5

0.8

IDD

Positive Supply Current

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