SSM2166SZ Analog Devices Inc, SSM2166SZ Datasheet - Page 14

• Manufacturer Part Number: SSM2166SZ
• Description: Audio Amp Microphone 1-CH Mono Class-AB 14-Pin SOIC N
• Manufacturer: Analog Devices Inc

Specifications of SSM2166SZ

• Package: 14SOIC N
• Function: Microphone
• Amplifier Type: Class-AB
• Typical Voltage Gain: 60 dB
• Total Harmonic Distortion Noise: 0.25@100000Ohm %
• Typical Psrr: 50 dB
• Typical Gain Bandwidth Product: 30 MHz
• Maximum Load Resistance: 100000 Ohm
• Output Type: 1-Channel Mono
• Voltage - Supply: 4.5 V ~ 5.5 V
• Features: Microphone
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Bandwidth: 20 kHz
• Current, Supply: 7.5 mA
• Harmonic Distortion: 0.25 %
• Impedance, Thermal: 120 °C/W
• Package Type: SOIC-14
• Temperature, Operating, Range: -40 to +85 °C
• Voltage, Input: 1 V
• Voltage, Noise: 17 nV/sqrt Hz
• Voltage, Supply: 4.5 to 5.5 V
• No. Of Channels: 1
• Supply Voltage Range: 4.5V To 5.5V
• Load Impedance: 75ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: SOIC
• No. Of Pins: 14
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Max Output Power X Channels @ Load: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

SSM2166
Figure 28. Evaluation Board Topside Metallization (Not to Scale)
Figure 27. Evaluation Board Topside Silkscreen (Not to Scale)
IC1
IC2
Rev. D | Page 14 of 20
EVALUATION BOARD EXAMPLES
To illustrate how easy it is to program the SSM2166, a practical
example is provided. The SSM2166 was used to interface an
electret-type microphone to a postamplifier. The evaluation
board or the circuit configuration shown in Figure 26 can be
used. The signal from the microphone was measured under
actual conditions to vary from 1 mV to 15 mV. The postamplifier
requires no more than 500 mV at its input. The required gain
from the SSM2166 is, therefore
The input buffer gain is set to 20 dB, and the VCA gain is adjusted
to 10 dB. The limiting or rotation point is set at 500 mV output.
A 2:1 compression ratio and a noise gate threshold that operates
below 100 μV is also used. These objectives are summarized in
Table 5. The transfer characteristic implemented is illustrated in
Figure 30.
Table 5. Objective Specifications
Parameter
Input Range
Output Range
Limiting Level
Compression
Buffer Gain
VCA Gain
Noise Gate
G
Figure 29. Evaluation Board Backside Metallization (Not to Scale)
TOTAL
= 20 × log(500/15) = 30 dB
Value
1 mV to 15 mV
To 500 mV
500 mV
2:1
20 dB
10 dB
100 μV