SSM2166S 데이터 시트보기 (PDF) - Analog Devices

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SSM2166S

Microphone Preamplifier with Variable Compression and Noise Gating

Analog Devices 

1.0

TA = +25°C

V+ = 5V

RL = 100k⍀

COMPRESSION RATIO = 1:1

NOISE GATE SETTING 550␮V rms

GAIN ADJUST (PIN 2) = 1.25k⍀

0.1

0.01

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

RROT PT RESISTOR – k⍀

Figure 9. Rotation Point vs. RROT PT (Pin 11 to V+)

5␮V

1s

100

90

10 TA = +25 C

0% COMPRESSION RATIO = 15:1

NOISE BW = 20kHz

Figure 10a. Wideband Output Noise

70

G = 60dB

60

50

G = 40dB

40

30

G = 20dB

20

10

ROTATION POINT = 1.13V rms

0 NOISE GATE SETTING = 336␮V rms

RCOMP = 40k⍀

–10 VIN = 400␮V rms

–20

1k

10k

100k

1M

FREQUENCY – Hz

Figure 10b. GBW Curves vs. VCA Gain

SSM2166

–10

RCOMP = 0

–20 RGAIN = 1.24k⍀

RGATE = 500k⍀

RROT = 1.74k⍀

–30

–40

V+ = 5±1V p-p

–50

V+ = 5±0.5V p-p

–60

–70

–80

20

100

1k

FREQUENCY – Hz

10k 30k

Figure 10c. PSRR vs. Frequency

20mV

100

90

TA = +25 C

CAVG = 2.2␮F

10

SYSTEM GAIN = 0dB

0%

RL = 10k⍀

COMP RATIO = 1:1

10␮s

Figure 11. Small Signal Transient Response

200mV

100

90

TA = +25 C

CAVG = 2.2␮F

10

SYSTEM GAIN = 0dB

0%

RL = 10k⍀

COMP RATIO = 1:1

10␮s

Figure 12. Large Signal Transient Response

REV. A

–5–

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