TDA1523 is a preamplifier for car radio/cassette players produced by Philips. Its features are two independent amplifiers with an open-loop gain of 90dB, internal DC feedback via a 140 kΩ resistor from output to feedback point, AC characteristics that can be determined externally by an RC network, electronic on/off switching with transient suppression for switch on, head input at DC ground that eliminates the input coupling capacitor, minimum external component requirement, stability down to a gain of 30 dB, low input noise, low distortion, and DC input current less than 2µA.
The Philips TDA1523 is a playback amplifier designed specifically for car radio/cassette players. It features two independent amplifiers with an open-loop gain of approximately 90 dB and includes internal DC feedback via a 140 kΩ resistor.
Key characteristics include electronic on/off switching with transient suppression, a head input at DC ground to eliminate the need for coupling capacitors, and stability down to a gain of 30 dB. The device is noted for low input noise, low distortion (THD < 0.05%), and minimal external component requirements.
| Supply voltage (Vp) | 7.6 - 12 V |
|---|---|
| Supply current (Ip) | - 5 - mA |
| Operating ambient temperature | -30 to +85 °C |
| Total harmonic distortion (THD) | 0.05 % |
| Channel separation (Ocs) | 45 dB |
| Internal feedback resistor | 140 kΩ |
The TDA1523 operates between -30 °C and +85 °C.
The typical total harmonic distortion is 0.05 %.