SSM2167Z-EVAL datasheet(5/12 Pages) AD

Part #	SSM2167Z-EVAL

Description	Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating

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Data Sheet

SSM2167

Rev. G | Page 5 of 12

TYPICAL PERFORMANCE CHARACTERISTICS

100

10

1

0

500

1000

1500

2000

2500

3000

3500

RGATE (Ω)

TA = 25°C

V+ = 3V

RLOAD = 100kΩ

COMPRESSION RATIO 2:1

ROTATION POINT = 63mV rms

Figure 3. Noise Gate vs. RGATE

1

0.1

0.01

20

100

1k

10k

30k

FREQUENCY (Hz)

TA = 25°C

V+ = 3V

VIN = 24.5mV rms

COMPRESSION RATIO 1:1

ROTATION POINT = 63mV rms

NOISE GATE SETTING = 2mV rms

Figure 4. THD + N vs. Frequency

35

30

25

20

15

10

5

0

–5

–10

–15

1k

10k

100k

1M

10M

FREQUENCY (Hz)

VIN = 2mV rms

RCOMP = 175kΩ

ROTATION POINT = 63mV rms

NOISE GATE SETTING = 2mV rms

Figure 5. GBW Curves vs. VCA Gain

1

0.1

0.01

0.1

1

INPUT VOLTAGE (V rms)

TA = 25°C

V+ = 3V

VIN FREQUENCY = 1kHz

RLOAD = 100kΩ

COMPRESSION RATIO 1:1

ROTATION POINT = 63mV rms

NOISE GATE SETTING = 2mV rms

Figure 6. THD + N vs. Input Voltage

0

–80

–70

–60

–50

–40

–30

–20

–10

–80

–70

–60

–50

–40

–30

–20

–10

INPUT (dBV)

COMPRESSION RATIO 10:1

COMPRESSION RATIO 5:1

COMPRESSION RATIO 2:1

COMPRESSION RATIO 1:1

TA = 25°C

V+ = 3V

RLOAD = 100kΩ

ROTATION POINT = 63mV rms

NOISE GATE SETTING = 2mV rms

Figure 7. Output vs. Input Characteristics

–10

–80

–70

–60

–50

–40

–30

–20

10

100

1k

10k

100k

FREQUENCY (Hz)

V+ = 3V + 0.1

RGATE = 5kΩ

RCOMP = 0Ω

Figure 8. PSRR vs. Frequency

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