MAX128BENG datasheet(3/16 Pages) MAXIM

3 / 16 page

Multirange, +5V, 12-Bit DAS with

2-Wire Serial Interface

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = +5V ±5%; unipolar/bipolar range; external reference mode, VREF = 4.096V; 4.7µF at REF pin; external clock, fCLK = 400kHz;

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

MAX128

MAX127

-600

360

IIN

-1200

720

µA

±VREF/2 range

±VREF range

±5V range

-1200

±10V range

-600

Bipolar

Input Voltage Range

VIN

-10

TC VREF

-5

MAX127

-VREF

VREF

-VREF/2

VREF/2

MAX128

Bipolar,

Table 3

MAX127

MAX128

0 to 5V or 0 to VREF/2 range

0 to 10V or 0 to VREF range

±5V or ±VREF/2 range

±10V or ±VREF range

Buffer Voltage Gain

1.638

V/V

REFADJ Adjustment Range

±1.5

Figure 12

Capacitive Bypass at REF

4.7

µF

REFADJ Output Voltage

2.465

2.500

2.535

Load Regulation (Note 5)

0 to 0.5mA output current

VREF

VREF/2

Unipolar,

Table 3

Input Resistance

∆VIN

∆IIN

Ω

-10

360

Unipolar

Input Current

-10

720

Bipolar

MAX128

0 to 5V range

-10

0.1

0 to 10V range

Unipolar

2.5

Small-Signal Bandwidth

MHz

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

2.5

-3dB

rolloff

1.25

Track/Hold Acquisition Time

µs

Input Capacitance

REFOUT Voltage

VREF

4.076

4.096

4.116

REFOUT Tempco

±15

ppm/°C

Output Short-Circuit Current

CONDITIONS

(Note 4)

TA = +25°C

MAX127_C/MAX128_C

±30

MAX127_E/MAX128_E

ANALOG INPUT

INTERNAL REFERENCE

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