SSM2166SZ Analog Devices Inc, SSM2166SZ Datasheet

SSM2166SZ

Manufacturer Part Number

SSM2166SZ

Description

Audio Amp Microphone 1-CH Mono Class-AB 14-Pin SOIC N

Manufacturer

Analog Devices Inc

Datasheets

1.SSM2166SZ-REEL7.pdf (20 pages)

2.SSM2166SZ.pdf (5 pages)

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

Supply Voltage Range

4.5V To 5.5V

Load Impedance

75ohm

Operating Temperature Range

-40Â°C To +85Â°C

Amplifier Case Style

SOIC

No. Of Pins

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

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

SSM2166SZ

Manufacturer:

ADI/亚德诺

Quantity:

20 000

Company:

H&T Electronics

Part Number:

SSM2166SZ

Quantity:

1 000

Company:

Amily Shenzhen XNWY Technology Co., Ltd

Part Number:

SSM2166SZ-REEL7

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FEATURES

Complete microphone conditioner in a 14-lead SOIC package

Single 5 V operation

Adjustable noise gate threshold

Compression ratio set by external resistor

Automatic limiting feature—prevents ADC overload

Adjustable release time

Low noise and distortion

Power-down feature

20 kHz bandwidth (±1 dB)

APPLICATIONS

Microphone preamplifiers/processors

Computer sound cards

Public address/paging systems

Communication headsets

Telephone conferencing

Guitar sustain effects generators

Computerized voice recognition

Surveillance systems

Karaoke and DJ mixers

GENERAL DESCRIPTION

The SSM2166 integrates a complete and flexible solution for

conditioning microphone inputs in computer audio systems. It

is also excellent for improving vocal clarity in communications

and public address systems. A low noise, voltage-controlled

amplifier (VCA) provides a gain that is dynamically adjusted by

a control loop to maintain a set compression characteristic. The

compression ratio is set by a single resistor and can be varied

from 1:1 to over 15:1 relative to a user-defined rotation point;

signals above the rotation point are limited to prevent overload

and to eliminate popping. In the 1:1 compression setting, the

Rev. D

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

FUNCTIONAL BLOCK DIAGRAM AND TYPICAL SPEECH APPLICATION

AUDIO

10kΩ

1µF

+IN

POWER DOWN

0.1µF

–IN

10kΩ

BUF OUT

SSM2166

Variable Compression and Noise Gating

BUFFER

GND

DETECTOR

VCA

LEVEL

10µF

Figure 2.

AVG CAP

VCA

1kΩ

SSM2166 can be programmed with a fixed gain of up to 20 dB;

this gain is in addition to the variable gain in other compression

settings. The input buffer can also be configured for front-end

gains of 0 dB to 20 dB. A downward expander (noise gate) prevents

amplification of noise or hum. This results in optimized signal

levels prior to digitization, thereby eliminating the need for

additional gain or attenuation in the digital domain that may

add noise or impair accuracy of speech recognition algorithms.

The compression ratio and time constants are set externally. A

high degree of flexibility is provided by the VCA gain, rotation

point, and noise gate adjustment pins.

The SSM2166 is an ideal companion product for audio codecs

used in computer systems, such as the AD1845. The SSM2166 is

available in a 14-lead SOIC package and is guaranteed for

operation over the extended industrial temperature range of

−40°C to +85°C.

Microphone Preamplifier with

10µF (OPTIONAL)

22µF

1kΩ

Figure 1. Compression and Gating Characteristics with 10 dB of Fixed Gain (The

VCA

CONTROL

25kΩ

COMP RATIO SET

V+

–10

–20

–30

–40

–50

–60

Gain Adjust Pin Can Be Used to Vary This Fixed Gain Amount)

–70

GAIN

ADJUST

ROTATION

SET

OUTPUT

NOISE GATE

SET

2.3kΩ

–60

17kΩ

COMP RATIO = 1:1

500kΩ

COMP RATIO = 2:1

COMP RATIO = 10:1

–50

V+

–40

INPUT (dBu)

–30

–20

SSM2166

–10

Related parts for SSM2166SZ

SSM2166SZ Summary of contents

Page 1

FEATURES Complete microphone conditioner in a 14-lead SOIC package Single 5 V operation Adjustable noise gate threshold Compression ratio set by external resistor Automatic limiting feature—prevents ADC overload Adjustable release time Low noise and distortion Power-down feature 20 kHz bandwidth ...

Page 2

SPECIFICATIONS kHz 100 kΩ GATE V = 300 mV rms. IN Table 1. Parameter Symbol AUDIO SIGNAL PATH Voltage Noise Density e Noise Total Harmonic Distortion and THD + ...

Page 3

SSM2166 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Audio Input Voltage Operating Temperature Range Storage Temperature Range Junction Temperature ( Lead Temperature (Soldering, 60 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage ...

Page 4

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 GND Ground. 2 GAIN ADJUST VCA Gain Adjust Pin. A resistor from this pin to ground sets the fixed gain of the VCA. To check ...

Page 5

... SSM2166S-REEL7 −40°C to +85°C 1 SSM2166SZ −40°C to +85°C 1 SSM2166SZ-REEL −40°C to +85°C 1 SSM2166SZ-REEL7 −40°C to +85° RoHS Compliant Part. Top Branding Revision Reflecting Die Replacement Original Die Revision Version (Prior to Rev Data Sheet) Pb-Free (RoHS) Version Top Line 1: SSM ...

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