SSM2166P

更新时间： 2024-01-18 20:36:39

品牌	Logo	应用领域
亚德诺 - ADI		消费电路商用集成电路音频放大器视频放大器光电二极管
页数	文件大小	规格书
15页	218K
描述
Microphone Preamplifier with Variable Compression and Noise Gating

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SSM2166P 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP, SOP14,.25	针数：	14
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.31.00.01	风险等级：	0.83
Is Samacsys：	N	标称带宽：	20 kHz
商用集成电路类型：	AUDIO PREAMPLIFIER	增益：	20 dB
JESD-30 代码：	R-PDSO-G14	JESD-609代码：	e3
长度：	8.65 mm	湿度敏感等级：	1
信道数量：	1	功能数量：	1
端子数量：	14	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP14,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	1.75 mm
子类别：	Audio/Video Amplifiers	最大压摆率：	10 mA
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.5 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	3.9 mm	Base Number Matches：	1

SSM2166P 数据手册

SSM2166

or an audio cable, then the onboard OP113 can be used. To

use the OP113 buffer, insert Jumper J4 into board socket pins

labeled “4” and “5” and insert Jumper J5 into board socket pins

labeled “6” and “7.” If the output buffer is not required, re-

move Jumper J5 and insert Jumper J4 into board socket pins “5”

and “7.” There are no blocking capacitors either on the input

nor at the output of the buffer. As a result, the output dc level

of the buffer will match the output dc level of the SSM2166,

which is approximately 2.3 V. A dc blocking capacitor may be

inserted on Pins 6 and 7. An evaluation board and setup proce-

dure is available from your Analog Devices representative.

Evaluation Board

If you build your own breadboard, keep the leads to Pins 3, 4,

and 5 short. A convenient evaluation board is available from

your sales representative. The R and C designations refer to the

demonstration board schematic of Figure 22 and parts list,

Figure 28.

Test Equipment Setup

The recommended equipment and configuration is shown in

Figure 26. A low noise audio generator with a smooth output

adjustment range of 50 µV to 50 mV is a suitable signal source.

A 40 dB pad would be useful to reduce the level of most genera-

tors by 100× to simulate the microphone levels. The input volt-

meter could be connected before the pad, and need only go

down to 10 mV. The output voltmeter should go up to 2 volts.

The oscilloscope is used to verify that the output is sinusoidal,

that no clipping is occurring in the buffer, and to set the limiting

and noise gating “knees.”

Setup Procedure with Evaluation Board

To illustrate how easy it is to program the SSM2166, we will

take a practical example. The SSM2166 will be used interface

an electret-type microphone to a post-amplifier. You can use

the evaluation board or the circuit configuration shown in Figure

22. The signal from the microphone was measured under actual

conditions to vary from 1 mV to 15 mV. The post-amplifier

requires no more than 500 mV at its input. The required gain

from the SSM2166 is, therefore:

SSM2166

SIGNAL

GENERATOR

EVALUATION

BOARD

OSCILLOSCOPE

G_TOT= 20 × log (500/15) = 30 dB

We will set the input buffer gain to 20 dB and adjust the VCA

gain to 10 dB. The limiting or “rotation” point will be set at

500 mV output. From prior experience, we will start with a 2:1

compression ratio, and a noise gate threshold that operates be-

low 100 µV. These objectives are summarized in Figure 24, and

we will fine-tune them later on. The transfer characteristic we

will implement is illustrated in Figure 25.

VOLTMETER

Figure 26. Test Equipment Setup

STEP 1. Configure the Buffer

The SSM2166 has an input buffer that may be used when the

overall gain required exceeds 20 dB, the maximum user-

selectable gain of the VCA. In our example, the desired output

is 500 mV for an input around 15 mV, requiring a total gain of

30 dB. We will set the buffer gain at 20 dB, and adjust VCA

for 10 dB. In the socket pins provided on the evaluation board,

Insert R1 = 100 kΩ, and R2 = 11 kΩ. You have set the buffer

gain to 20 dB (×10).

INPUT RANGE

OUTPUT RANGE

LIMITING LEVEL

COMPRESSION

BUFFER GAIN

VCA GAIN

1-15 mV

TO 500 mV

500 mV

2:1

20 dB

10 dB

NOISE GATE

100 ␮V

Figure 24. Objective Specifications

STEP 2. Initialize Potentiometers

With power off, preset the potentiometers per the table of Fig-

ure 27 below.

Note: the SSM2166 processes the output of the buffer, which in

our example is 20 dB or ten times the input level. Use the oscil-

loscope to verify that you are not driving the buffer into clipping

with excessive input signals. In your application, you should

take the minimum gain in the buffer consistent with the average

source level as well as the crest factor (ratio of peak to rms).

INITIAL

FUNCTION

POT RANGE POSITION RESISTANCE

EFFECT OF CHANGE

GAIN ADJUST R10 0–20 k⍀

(VCA)

CCW

ZERO

0 dB; CW TO INCREASE

VCA GAIN

1 V; CW TO REDUCE

ROTATION POINT

ROTATION

POINT

R3 0–50 k⍀

CCW

ZERO

1 M⍀

1:1; CW TO INCREASE

COMPRESSION

COMPRESSION R6

RATIO

0–100

k⍀

ROTATION POINT

300 ␮V; CCW TO

INCREASE THRESHOLD

NOISE GATE

R7 0–1 M⍀

500

COMPRESSION

REGION

LIMITING REGION

Figure 27. Initial Potentiometer Settings

STEP 3. Test Setup

With power on, adjust the generator for an input level of 15 mV,

1 kHz. The output meter should indicate approximately 100 mV.

If not, check your setup.

GATE THRESHOLD

STEP 4. Adjusting the VCA Gain

Set the input level to 15 mV. Adjust R10—GAIN ADJ CW for

an output level of 500 mV. You have now set the VCA gain to

10 dB.

0.1

1.0

INPUT – mV

Figure 25. Transfer Characteristic

–12–

REV. A

1...9 10 111213 14 15

中文翻译

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与SSM2166P相关器件

型号	品牌	获取价格	描述	数据表
SSM2166S	ADI	获取价格	Microphone Preamplifier with Variable Compression and Noise Gating
SSM2166S-REEL	ADI	获取价格	Microphone Preamplifier with Variable Compression and Noise Gating
SSM2166S-REEL7	ADI	获取价格	Microphone Preamplifier with Variable Compression and Noise Gating
SSM2166SZ	ADI	获取价格	Complete Microphone Conditioner with Variable Compression & Noise Gating
SSM2166SZ1	ADI	获取价格	Microphone Preamplifier with Variable Compression and Noise Gating
SSM2166SZ-REEL	ADI	获取价格	Complete Microphone Conditioner with Variable Compression & Noise Gating
SSM2166SZ-REEL1	ADI	获取价格	Microphone Preamplifier with Variable Compression and Noise Gating
SSM2166SZ-REEL7	ADI	获取价格	Microphone Preamplifier
SSM2166SZ-REEL71	ADI	获取价格	Microphone Preamplifier with Variable Compression and Noise Gating
SSM2167	ADI	获取价格	Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating

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