6

REF05

OUTPUT ADJUSTMENT

The REF05 trim terminal can be used to adjust the voltage

over a 5V

±150mV range. This feature allows the system

designer to trim system errors by setting the reference to a

tions (see Figure 1).

FIGURE 4. Current Source.

FIGURE 5.

±2.5V Precision Reference.

FIGURE 6. Current Sink.

Adjustment of the output does not significantly affect the

temperature performance of the device. The temperature

coefficient change is approximately 0.7ppm/

°C for 100mV of

output adjustment.

NOTE: (1) 20mV LSB for 8-bit applications.

V

OUT

REF05

V

IN

Trim

GND

+5V Reference with Trimmed Output

2

6

5

4

R

POT

10k

Ω

(Optional)

Output

3

Temp

FIGURE 1.

FIGURE 2. Burn-In Circuit.

REF05

GND

2

4

–18V

+18V

V

IN

TYPICAL APPLICATIONS

FIGURE 3.

±5V Precision Reference.

5k

Ω

OPA177

10k

Ω

10k

Ω

–15V

+15V

–5V

–5V

Trim

GND

V

IN

35

4

2

REF05

0.1µF

V

O

Temp

6

I

+ 1mA

5.0V

R

R

I

OUT

GND

V

IN

V

O

Trim

3

2

6

5

4

Voltage Compliance: –25V to +8V

+15V

REF05

Temp

R

1

5.6k

Ω

V

O

+2.5V

V

REF

V

O

–2.5V

OPA177

REF05

R

2

5.6k

Ω

–9V

5V

+

–

R

1

R

V

+

(V

R

2

R

V

–

(V

7

6

4

3

2

4

2

6

GND

V

IN

V

O

I

+ 1mA

5.0V

R

R

I

OUT

GND

V

IN

V

O

Trim

3

2

6

5

4

Voltage Compliance: –8V to +25V

–15V

REF05

Temp