ATA2525 Datasheet | Atmel

Features - No external ponents except PIN diode - Supply-voltage range: 4.5V to 5.5V - High sensitivity due to automatic sensitivity adaption (AGC) and automatic strong signal adaption (ATC) - High immunity against disturbances from daylight and lamps - Small size and innovative pad layout - Available for carrier frequencies between 33k Hz to 40k Hz; adjusted by zener diode fusing - TTL and CMOS patible - Suitable minimum burst length ≥ 10 pulses/burst Applications - Home entertainment applications - Home appliances - Remote control equipment 4854H-AUTO-03/14 1. Description The Atmel® IC ATA2525 is a plete IR receiver for data munication that was developed and optimized for use in carrier-frequency-modulated transmission applications. The IC bines small size with high sensitivity as well as high suppression of noise from daylight and lamps. An innovative and patented pad layout offers unique flexibility for assembly of IR receiver modules. The Atmel ATA2525 is available with standard carrier frequencies (33, 36, 37, 38, 40k Hz) and 3 different noise suppression regulation types (standard, lamp, noise) covering requirements of different high-volume remote control solutions (please refer to selection guide available for Atmel ATA2525/ATA2526). The Atmel ATA2525 operates in a supply voltage range of 4.5V to 5.5V. The function of Atmel ATA2525 can be described using the block diagram (see Figure 1-1 on page 2). The input stage meets two main functions. First, it provides a suitable bias voltage for the PIN diode. Secondly, the pulsed photo-current signals are transformed into a voltage by a special circuit which is optimized for low-noise applications. After amplification by a controlled gain amplifier (CGA), the signals have to pass a tuned integrated narrow bandpass filter with a center frequency f0 which is equivalent to the chosen carrier frequency of the input signal. The demodulator is used to convert the input burst signal into a digital envelope output pulse and...