参数资料
型号: SSM2135SZ
厂商: Analog Devices Inc
文件页数: 4/16页
文件大小: 0K
描述: IC AMP AUDIO STER CLASS AB 8SOIC
标准包装: 98
放大器类型: 音频
电路数: 1
转换速率: 0.9 V/µs
增益带宽积: 3.5MHz
电流 - 输入偏压: 300nA
电压 - 输入偏移: 200µV
电流 - 电源: 3.7mA
电流 - 输出 / 通道: 30mA
电压 - 电源,单路/双路(±): 4 V ~ 36 V,±2 V ~ 18 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SO
包装: 管件
产品目录页面: 775 (CN2011-ZH PDF)
SSM2135
Rev. G | Page 12 of 16
Single Supply Differential Line Driver
Signal distribution and routing is often required in audio systems,
particularly portable digital audio equipment for professional
applications. Figure 35 shows a single-supply line driver circuit
that has differential output. The bottom amplifier provides a
2 V dc bias for the differential amplifier to maximize the output
swing range. The amplifier can output a maximum of 0.8 V rms
signal with a 5 V supply. It is capable of driving into 600 Ω line
termination at a reduced output amplitude.
5V
1/2
SSM2135
1/2
SSM2135
AUDIO IN
100F
1k
DIFFERENTIAL
AUDIO OUT
5V
1/2
SSM2135
1k
2.5k
100
5V
7.5k
5k
1F
0.1F
2V
10k
1k
10F + 0.1F
00
34
9-
0
36
Figure 35. Single-Supply Differential Line Driver
Single-Supply Differential Line Receiver
Receiving a differential signal with minimum distortion is
achieved using the circuit in Figure 36. Unlike a difference
amplifier (a subtractor), the circuit has a true balanced input
impedance regardless of input drive levels; that is, each input
always presents a 20 kΩ impedance to the source. For best
common-mode rejection performance, all resistors around the
differential amplifier must be very well matched. Best results
can be achieved using a 10 kΩ precision resistor network.
1/2
SSM2135
AUDIO
OUT
1/2
SSM2135
20k
5V
1/2
SSM2135
DIFFERENTIAL
AUDIO IN
100
5k
1F
0.1F
2.5k
5V
7.5k
10
10F
20k
2V
20k
10F + 0.1F
00349
-03
7
Figure 36. Single-Supply Balanced Differential Line Receiver
Pseudoreference Voltage Generator
For single-supply circuits, a reference voltage source is often
required for biasing purposes or signal offsetting purposes. The
circuit in Figure 37 provides a supply splitter function with low
output impedance. The 1 μF output capacitor serves as a charge
reservoir to handle a sudden surge in demand by the load as
well as providing a low ac impedance to it. The 0.1 μF feedback
capacitor compensates the amplifier in the presence of a heavy
capacitive load, maintaining stability.
The output can source or sink up to 12 mA of current with a
5 V supply, limited only by the 100 Ω output resistor. Reducing
the resistance increases the output current capability. Alternatively,
increasing the supply voltage to 12 V also improves the output
drive to more than 25 mA.
1/2
SSM2135
V+ = 5V TO 12V
R3
2.5k
R4
100k
R2
5k
R1
5k
C1
0.1F
V+
2
OUTPUT
C2
1F
0
03
49
-0
38
Figure 37. Pseudoreference Generator
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