Ds1870 ldmos rf power-amplifier bias controller, Typical operating characteristics – Rainbow Electronics DS1870 User Manual

Page 6

Advertising
background image

DS1870

LDMOS RF Power-Amplifier Bias
Controller

6

_____________________________________________________________________

Typical Operating Characteristics

(V

CC

= +5.0V, T

A

= +25°C, unless otherwise noted.)

POTENTIOMETER 1 AND 2 OUTPUT VOLTAGE

vs. POSITON

DS1870 toc04

WIPER POSITION (DEC)

WIPER VOLTAGE (V)

192

128

64

1

2

3

4

5

6

0

0

256

H

COM

= 5V

L1 AND L2
NOT CONNECTED

POTENTIOMETER 1 DIFFERENTIAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc05

WIPER POSITION (DEC)

DIFFERENTIAL NONLINEARITY (LSB)

192

128

64

-0.20

-0.15

-0.10

-0.05

0

0.05

0.10

0.15

0.20

0.25

-0.25

0

256

POTENTIOMETER 2 DIFFERENTIAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc06

WIPER POSITION (DEC)

DIFFERENTIAL NONLINEARITY (LSB)

192

128

64

-0.20

-0.15

-0.10

-0.05

0

0.05

0.10

0.15

0.20

0.25

-0.25

0

256

POTENTIOMETER 1 INTEGRAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc07

WIPER POSITION (DEC)

INTEGRAL NONLINEARITY (LSB)

192

128

64

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5

0

256

POTENTIOMETER 2 INTEGRAL

NONLINEARITY vs. WIPER POSITION

DS1870 toc08

WIPER POSITION (DEC)

INTEGRAL NONLINEARITY (LSB)

192

128

64

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

-0.5

0

256

POTENTIOMETER 1 AND 2

WIPER RESISTANCE vs. WIPER VOLTAGE

DS1870 toc09

WIPER VOLTAGE (V)

WIPER RESISTANCE (

)

4

3

2

1

100

200

300

400

500

600

700

800

900

1000

0

0

5

H

COM

= 5.0V

SUPPLY CURRENT vs. SUPPLY VOLTAGE

DS1870 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

5.3

5.1

4.9

4.7

620

640

660

680

700

720

740

760

780

800

600

4.5

5.5

SUPPLY CURRENT vs. TEMPERATURE

DS1870 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

80

60

20

40

0

-20

450

500

550

600

650

700

750

800

850

900

400

-40

100

V

CC

= 5.5V

V

CC

= 4.5V

V

CC

= 5.0V

H

COM

CURRENT vs. H

COM

VOLTAGE

DS1870 toc03

H

COM

VOLTAGE (V)

H

COM

CURRENT (mA)

5.3

5.1

4.9

4.7

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

0

4.5

5.5

Advertising