AD588(RevD) Просмотр технического описания (PDF) - Analog Devices

Номер в каталоге

Компоненты Описание

производитель

AD588
(Rev.:RevD)

High Precision Voltage Reference

Analog Devices 

AD588

Range

+10 V

–5 V or +5 V

–10 V

+5 V

Table I. Pin Connections

Connect

Pin 10 Unbuffered* Output on Pins

to Pin: –10 V –5 V 0 V +5 V +10 V

Buffered

Output

Connections

Buffered Output on Pins

–10 V –5 V 0 V +5 V +10 V

8

8 11 6

11 to 13, 14 to 15

6 to 4, and 3 to 1

11

8

11 6

8 to 13, 14 to 15,

15

6 to 4, and 3 to 1

6

8

11 6

8 to 13, 14 to 15,

15

11 to 4, and 3 to 1 1

11

6

6 to 4 and 3 to 1

15

1

1

1

–5 V

11

8

*Unbuffered outputs should not be loaded.

8 to 13 and 14 to 15

15

Figure 2b shows GAIN and BALANCE trims in a +5 V and

–5 V tracking configuration. A 100 kΩ 20-turn potentiometer is

used for each trim. The potentiometer for GAIN trim is con-

nected between Pin 6 (VHIGH) and Pin 8 (VLOW) with the wiper

connected to Pin 5 (GAIN ADJ). The potentiometer is adjusted

to produce exactly 10 V between Pin 1 and Pin 15, the amplifier

outputs. The BALANCE potentiometer, also connected between

Pin 6 and Pin 8 with the wiper to Pin 12 (BAL ADJ), is then

adjusted to center the span from +5 V to –5 V.

Trimming in other configurations works in exactly the same

manner. When producing +10 V and +5 V, GAIN ADJ is used

to trim +10 V and BAL ADJ is used to trim +5 V. In the –10 V

and –5 V configuration, GAIN ADJ is again used to trim the

magnitude of the span, –10 V, while BAL ADJ is used to trim

the center tap, –5 V.

In single output configurations, GAIN ADJ is used to trim outputs

utilizing the full span (+10 V or –10 V), while BAL ADJ is used

to trim outputs using half the span (+5 V or –5 V).

Input impedance on both the GAIN ADJ and BAL ADJ pins is

approximately 150 kΩ. The GAIN ADJUST trim network

effectively attenuates the 10 V across the trim potentiometer

by a factor of about 1500 to provide a trim range of –3.5 mV to

+7.5 mV with a resolution of approximately 550 µV/turn

(20-turn potentiometer). The BAL ADJ trim network attenu-

ates the trim voltage by a factor of about 1400, providing a

trim range of ± 4.5 mV with resolution of 450 µV/turn.

RB

A1

R1

R2

R3

A2

R4

R5

R6

A3

A4

+VS

AD588

–VS

SYSTEM

GROUND

Figure 2a. +10 V Output

NOISE

1␮F

REDUCTION

+15V

+10V

+5V

+15V

0.1␮F

SYSTEM

GROUND

0.1␮F

–15V

A3

+5V

RB

A1

R1

R4

R2

R3

A2

R5

R6

A4

+VS

AD588

–VS

–5V

–15V

0.1␮F

SYSTEM

GROUND

0.1␮F

–15V

SYSTEM

GROUND

100k⍀

20T

BALANCE

ADJUST

100k⍀

20T

GAIN ADJUST

Figure 2b. +5 V and –5 V Outputs

REV. D

–5–

Share Link: