MAX1270BCNG datasheet(3/20 Pages) MAXIM

Part #	MAX1270BCNG

Description	Multirange, 5V, 8-Channel, Serial 12-Bit ADCs

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Manufacturer	MAXIM [Maxim Integrated Products]

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Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +5.0V ±5%; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock; fCLK = 2.0MHz,

50% duty cycle (MAX127_B); fCLK = 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, TA = TMIN to TMAX, unless

otherwise noted. Typical values are TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ANALOG INPUT

MAX127_A, fCLK = 1.8MHz

3.3

Track/Hold Acquisition Time

tACQ

MAX127_B, fCLK = 2.0MHz

3.0

µs

±10V or ±VREF

range

5

±5V or ±VREF/2

range

2.5

0 to 10V or 0 to

VREF range

2.5

Small-Signal Bandwidth

-3dB rolloff

0 to 5V or 0 to

VREF/2 range

1.25

MHz

RNG = 1

0

10

MAX1270

RNG = 0

0

5

RNG = 1

0

VREF

Unipolar (BIP =

0), Table 3

MAX1271

RNG = 0

0

VREF/2

RNG = 1

-10

+10

MAX1270

RNG = 0

-5

+5

RNG = 1

-VREF

+VREF

Input Voltage Range

(Table 3)

VIN

Bipolar (BIP =

1), Table 3

MAX1271

RNG = 0

-VREF/2

+VREF/

2

V

0 to 10V

range

-10

+720

MAX1270

0 to 5V

range

-10

+360

Unipolar

MAX1271

-10

0.1

+10

±10V

range

-1200

+720

MAX1270

±5V range

-600

+360

±VREF

range

-1200

+10

Input Current

IIN

Bipolar

MAX1271

±VREF/2

range

-600

+10

µA

Unipolar

21

Dynamic Resistance

∆VIN/∆IIN

Bipolar

16

k

Ω

Input Capacitance

(Note 4)

40

pF

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