with +1.2V Buffered Reference

10

______________________________________________________________________________________

Detailed Description

The MAX4036–MAX4039 consume an ultra-low supply

current and have rail-to-rail output stages specifically

designed for low-voltage operation. The input common-

although full rail-to-rail input range is possible with

degraded performance when operating from a supply

voltage above 3.0V. The input offset voltage is typically

200µV. Low-operating supply voltage, low supply current,

and rail-to-rail outputs make the MAX4036–MAX4039 an

excellent choice for precision or general-purpose low-

voltage, battery-powered systems.

Rail-to-Rail Outputs

The MAX4036–MAX4039 output stages can drive a 5kΩ

load and still swing to within 40mV of the rails. Figure 1

shows the output voltage swing of the MAX4036–

MAX4039 configured as a unity-gain buffer, powered

from a single 2.4V supply. The output for this setup typi-

PIN

MAX4038/

MAX4038A

MAX4039

MAX4036/

MAX4036A

MAX4037

µMAX*/TDFN UCSP µMAX/TDF

UCSP

NAME

FUNCTION

1

3

—

—

—

—

IN+

Noninverting Amplifier Input

2

2

4

A2

5

A2

Negative Power-Supply Voltage

3

4

—

—

—

—

IN-

Inverting Amplifier Input

4

1

—

—

—

—

OUT

Amplifier Output

56

8

C2

10

C2

Positive Power-Supply Voltage

—

5

—

—

6

B2

REF

Reference Voltage Output

—

—

1

C1

1

C1

OUTA

Amplifier Output (Channel A)

—

—

2

B1

2

B1

INA-

Inverting Amplifier Input (Channel A)

—

—

3

A1

3

A1

INA+

Noninverting Amplifier Input (Channel A)

—

—

5

A3

7

A3

INB+

Noninverting Amplifier Input (Channel B)

—

—

6

B3

8

B3

INB-

Inverting Amplifier Input (Channel B)

—

—

7

C3

9

C3

OUTB

Amplifier Output (Channel B)

—

—

—

B2

4

—

N.C.

No Connection. Not internally connected.

——

—

—

—

—

EP

(TDFN only)

unconnected (TDFN packages only).

2ms/div

1V/div

1.5V

1.5V

Figure 1. Rail-to-Rail Input/Output Voltage Range

*

Both MAX4038/MAX4038A available in µMAX package only.