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AN7168 low frequency integrated amplifier. Reference data

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Encyclopedia of radio electronics and electrical engineering / Application of microcircuits

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The AN7168 is a two-channel low-frequency power amplifier that provides 2x5,8 W output power into a 4 ohm load at a supply voltage of 13,2 V. The circuit has built-in protection and stabilization circuits. The 12-pin SIL package allows for a compact, highly integrated device.

Table 1

Pin number designation appointment
1 NFB 1 Amplifier feedback input 1
2 IN 1 Amplifier input 1
3 RF Filter Output
4 GND(IN) Common (input stages)
5 IN2 Amplifier input 2
6 NFB 2 Amplifier feedback input 2
7 OUT 2 Amplifier output 2
8 BS2 Amplifier 2 feedback compensation input
9 GND(OUT) Common (output stages)
10 Vcc Supply voltage
11 BS1 Amplifier 1 feedback compensation input
12 OUT1 Amplifier output 1

AN7168 low frequency integrated amplifier. Reference data. The appearance of the microcircuit
Rice. 1. Appearance of the microcircuit

IC Features:

- high stability of work;
- low level of non-linear distortions;
- low quiescent current;
- low level of own noise;
- a small number of external elements;
- protection against short circuit of the output to the case and to the power source;
- protection against connection of both outputs to each other;
- protection against excess supply voltage;
- click suppression when turning on and off;
- Built-in overheating protection circuit.
AN7168 low frequency integrated amplifier. Reference data. Structural diagram of the microcircuit
Rice. 2 Block diagram of the microcircuit

Table 2

Parameter name, unit of measurement designation Min Name Mach Measurement mode
Quiescent current, mA Ico 30 55 100 V1 = 0
Voltage gain, dB KV 52 54 56 Рout=0,5W
- 0,1 0,5 Рout=0,5 W, f=1 kHz
Nonlinear distortion factor, % SOI - 0,1 - Рout=0,5 W, f=100 Hz
- 0,2 - Рout= 0,5 W, f=10 kHz
5 5,7 - Кnor= 10%
Maximum output power, W Ро - 8,9 - Кnor= 10%, Rload=2 ohm
- 3,1 - Кnor= 10%, Rload=8 ohm
Output noise voltage, mV VDO NOT - 0,8 1,5 RG=10 kOhm, Δf = 15..30000 Hz
- 1,1 - RG\u10d XNUMX kOhm, filter disabled
Channel unbalance, dB Sv - 0 1 Рout=0,5 W
Channel separation, dB Cs 40 50 - Рout=0,5 W
Input voltage mixing, mV VOFF - 0 200 V1=0

AN7168 low frequency integrated amplifier. Reference data. Typical scheme for switching on a microcircuit
Fig3 Typical scheme for switching on a microcircuit

Table 3

Parameter name, unit of measure designation value
Maximum supply voltage, V Vcc max 24
Maximum current consumption, A Icc MAX 4
Supply voltage surge (duration no more than 0,2 s), V Vcc MAX 50
Operating temperature range, ° С TOPR -30 ... + 75
Storage temperature, ° С TSTG -40 ... + 150

AN7168 low frequency integrated amplifier. Reference data. Bridge switching circuit
Rice. 4. Bridge switching circuit

The IC pinout is shown in fig. 1, its block diagram - in fig. 2, a typical switching circuit - in fig. 3, a bridge switching circuit - in fig. 4. Table 1 shows the pin assignment, Table 2 shows the main electrical parameters (at the supply voltage Vcc = 13,2 V, load resistance RL\u4d 1 Ohm, input signal frequency f \uXNUMXd XNUMX kHz and ambient temperature TА\u25d 3 ° C), in table XNUMX - the maximum permissible values ​​of the parameters.

Publication: cxem.net

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