MAX881REUB datasheet(4/8 Pages) MAXIM

Part #	MAX881REUB

Description	Low-Noise Bias Supply in 關MAX with Power-OK for GaAsFET PA

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Noise Bias Supply in µMAX

with Power-OK for GaAsFET PA

4

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 3, VIN = 3.6V, TA = +25°C, unless otherwise noted.)

100

µs/div

START-UP FROM SHUTDOWN

(NO LOAD)

+5V

VOUT

POK

SHDN

MAX881R-TOC10

-2V

0

VIN

0

VIN = 3.6V

CIRCUIT OF FIGURE 3b

5

µs/div

OUTPUT NOISE AND RIPPLE

(CIRCUIT OF FIGURE 3a)

VOUT

1mV/div

AC COUPLED

MAX881R-TOC11

VIN = 3.6V

VOUT = -2V

IOUT = 2.5mA

10

µs/div

OUTPUT NOISE AND RIPPLE

(CIRCUIT OF FIGURE 3b)

VOUT = 0

VIN = 0

1mV/div

AC COUPLED

VOUT = -2V

VIN = 3.6V

1mV/div

AC COUPLED

MAX881R-TOC12

RL = 500Ω

NOISE FLOOR

OUTPUT NOISE

60

-40

1

10

100

1000

OUTPUT NOISE SPECTRUM

(CIRCUIT OF FIGURE 3a)

-20

FREQUENCY (kHz)

0

20

40

50

-30

-10

10

30

VIN = 3.6V

VOUT = -2V

IOUT = 2.5mA

60

-40

1

10

100

1000

OUTPUT NOISE SPECTRUM

(CIRCUIT OF FIGURE 3b)

-20

FREQUENCY (kHz)

0

20

40

50

-30

-10

10

30

VIN = 3.6V

VOUT = -2V

IOUT = 4mA

2ms/div

LINE-TRANSIENT RESPONSE

VIN

VOUT

MAX881R-TOC15

10mV/

div

3.3V

2.7V

ILOAD = 4mA

VOUT = -2V

CIRCUIT OF FIGURE 3b

100

µs/div

LOAD-TRANSIENT RESPONSE

IOUT

VOUT

MAX881R-TOC16

10mV/

div

4mA

400

µA

VIN = 3.6V

VOUT = -2V

CIRCUIT OF FIGURE 3b

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