Rainbow-electronics MAX844 Instrukcja Użytkownika Pobierz pdf (Strona 4)

MAX840/MAX843/MAX844

Low-Noise, Regulated, -2V GaAsFET Bias

4 _______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 2a, V

= 3.6V, T

= +25°C, unless otherwise noted.)

MAX840 OUTPUT NOISE AND RIPPLE

(C1 = C2 = C3 = 1µF, C4 = 10µF)

= 3.6V, V

OUT

= -2V, I

OUT

= 4mA, AC COUPLED

10µs/div

OUT



500µV/div



MAX840 OUTPUT NOISE AND RIPPLE

(C1 = C2 = C3 = 0.22µF, C4 = 4.7µF)

= 3.6V, V

OUT

= -2V, I

OUT

= 4mA, AC COUPLED

10µs/div

OUT



1mV/div



MAX843/MAX844 OUTPUT NOISE AND RIPPLE

(C1 = C2 = C3 = 1µF, C4 = 10µF)

= 3.6V, V

OUT

= -2V, I

OUT

= 4mA, AC COUPLED

10µs/div

OUT



500µV/div



MAX843/MAX844 OUTPUT NOISE AND RIPPLE

(C1 = C2 = C3 = 0.22µF, C4 = 4.7µF)

= 3.6V, V

OUT

= -2V, I

OUT

= 4mA, AC COUPLED

10µs/div

OUT



1mV/div



OSCILLATOR FREQUENCY 

vs. SUPPLY VOLTAGE



MAX840-17

SUPPLY VOLTAGE (V)

OSCILLATOR FREQUENCY (kHz)

150

140

120

130

110

100

24 83579

= +25°C, +85°C

= -40°C

SHDN = HIGH

MAX844

OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE



MAX840-18

SUPPLY VOLTAGE (V)

OSCILLATOR FREQUENCY (kHz)

24 83579

= +25°C, +85°C

= -40°C

SHDN = LOW

1 2 3 4 5 6 7 8 9 10

MAX840/MAX843/MAX844 1

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