ATA2525 ATMEL | Alldatasheet
Document overview
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Technical content
Features
- No External Components 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 33 kHz to 40 kHz; Adjusted by Zener Diode Fusing TTL and CMOS Compatible Suitable Minimum Burst Length ≥ 10 Pulses/Burst
Applications
Home Entertainment Applications Home Appliances Remote Control Equipment 1. Description The IC ATA2525 is a complete IR receiver for data communication that was devel- oped and optimized for use in carrier-frequency-modulated transmission applications. The IC combines small size with high sens itivity as well as high suppression of noise from daylight and lamps. An innovative and patented pad layout offers unique flexibil- ity for assembly of IR receiver modul es. The ATA2525 is available with standard carrier frequencies (33, 36, 37, 38, 40 kHz) and 3 different noise suppression regula- tion types (standard, lamp, noise) covering requirements of different high-volume remote control solutions (please refer to selection guide available for ATA2525/ATA2526). The ATA2525 operates in a supply voltage range of 4.5V to 5.5V. The function of ATA2525 can be descri bed 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-nois e applications. After amplification by a Controlled Gain Amplifier (CGA), the signals have to pass a tuned integrated narrow bandpass filter with a center frequency f 0 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 to evaluate the signal infor- mation quality, i.e., unwanted pulses will be suppressed at the output pin. All this is done by means of an integrated dynamic feedback circuit which varies the gain as a function of the present environmental condition (ambient light, modulated lamps etc.). Other special features are used to adapt to the current application to secure best transmission quality. IR Receiver ASSP ATA2525 4854E–AUTO–10/06
4854E–AUTO–10/06 ATA2525 Figure 1-1. Block Diagram DemodulatorInput GND ATA2525 Carrier frequency f 0 Modulated IR signal min 10 pulses OUT VS Oscillator AGC/ATC and digital control CGA and filter Micro- controller IN
4854E–AUTO–10/06 ATA2525 2. Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Symbol Value Unit Supply voltage V S –0.3 to +6 V Supply current I S 3m A Input voltage V IN –0.3 to VS V Input DC current at VS = 5V I IN 0.75 mA Output voltage V O –0.3 to VS V Output current I O 10 mA Operating temperature T amb –25 to +85 °C Storage temperature T stg –40 to +125 °C Power dissipation at Tamb = 25°C P tot 30 mW 3. Thermal Resistance Parameter Symbol Value Unit Junction ambient TSSOP8 R thJA 110 K/W 4. Electrical Characteristics Tamb = –25°C to +85°C, VS = 4.5V to 5.5V unless otherwise specified. No. Parameters Test Conditions Pi n Symbol Min. Typ. Max. Unit Type*
1 Supply
1.1 Supply-voltage range 1 V S 4.5 5 5.5 V C 1.2 Supply current I IN = 0 1 I S 0.8 1.1 1.4 mA B
2 Output
2.1 Internal pull-up resistor Tamb = 25°C; see
Figure 6-7 on page 8 1,3 R PU 40 k Ω A
2.2 Output voltage low IL = 2 mA; see
Figure 6-7 on page 8 3,6 V OL 250 mV B 2.3 Output voltage high T amb = 25°C 3,1 V OH VS – 0.25 V S VA
2.4 Output current
R2 = 0; see Figure 6-7 on page 8 3,6 I OCL 8m A B
3 Input
3.1 Input DC current VIN = 0; see
Figure 6-7 on page 8 5I IN_DCMAX –85 µA C
3.2 Input DC current;
VIN = 0; Vs = 5V, Tamb = 25°C 5I IN_DCMAX –530 –960 µA B *) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 2. After transformation of input current into voltage
4854E–AUTO–10/06 ATA2525 3.3 Minimum detection threshold current; Figure 6-2 on page 5 Test signal: see Figure 6-6 on page 7 VS = 5V, Tamb = 25°C, IIN_DC = 1 µA; square pp, burst N = 16, f = f0; tPER = 10 ms, Figure 6-6 on page 7; BER = 50(1) 3I Eemin –600 pA B 3.4 Minimum detection threshold current with AC current disturbance IIN_AC100 = 3 µA at 100 Hz Test signal: see Figure 6-6 on page 7 V S = 5V, Tamb = 25°C, IIN_DC = 1 µA, square pp, burst N = 16, f = f0; tPER = 10 ms, Figure 6-6 on page 7; BER = 50%(1)
3 IEemin –850 pA C
3.5 Maximum detection
Test signal: see Figure 6-6 on page 7 VS = 5V, Tamb = 25°C, IIN_DC = 1 µA; square pp, burst N = 16, f = f0; tPER = 10 ms, Figure 6-6 on page 7; BER = 5%(1) 3I Eemax –400 µA D
4 Controlled Amplifier and Filter
4.1 Maximum value of
variable gain (CGA) VS = 5V, Tamb = 25°C GVARMAX 51 dB D
4.2 Minimum value of
variable gain (CGA) VS = 5V, Tamb = 25°C GVARMIN –5 dB D
4.3 Total internal
amplification(2) VS = 5V, Tamb = 25°C G MAX 71 dB D
4.4 Center frequency fusing
accuracy of bandpass VS = 5V, Tamb = 25°C f 0_FUSE –3 f 0 +3 % A
4.5 Overall accuracy center
frequency of bandpass f0 –6.7 f0 +4.1 % C
4.6 BPF bandwidth –3 dB; f0 = 38 kHz; see
Figure 6-4 on page 6 B3 . 5 k H z B 4. Electrical Characteristics (Continued) Tamb = –25°C to +85°C, VS = 4.5V to 5.5V unless otherwise specified. No. Parameters Test Conditions Pi n Symbol Min. Typ. Max. Unit Type* *) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 2. After transformation of input current into voltage
4854E–AUTO–10/06 ATA2525 Figure 6-7. Application Circuit IIN_DC IIN VIN VO IEe IS IOCL IL R1 = 220 Ω (1) ≤ 470 pF (1) > 2.4 k Ω (1) optional C1 = 4.7 µF GND OUT MicrocontrollerATA2525 IN RPU = 40 k Ω IN VS VDD = 5V
4854E–AUTO–10/06 ATA2525 7. Chip Dimensions Figure 7-1. Chip Size in µm Note: Pad coordinates are for lower left corner of the pad in µm from the origin 0,0 Note: 1. Value depends on manufacture location. Dimensions Length inclusive scribe 1.04 mm Width inclusive scribe 1.11 mm Thickness 290µ ±5% Pads 80µ × 80µ Fusing pads 60µ × 60µ Pad metallurgy Material AlCu/AlSiTi(1) Thickness 0.8 µm Finish Material Si3N4/SiO2 (1) Thickness 0.7/0.3 µm 0,0 990,960 scribe width length ATA2525 OUT Versioning 393,839 224,495 47,72 603,828 Zapping IN VS GND
4854E–AUTO–10/06 ATA2525 Notes: 1. xx means the used carrier frequency value (33, 36, 37, 38 or 40 kHz) 2. Maximum data transmission rate up to bits/s with f 0 = 40 kHz, VS = 5V (see Figure 6-2 on page 5) 9. Pad Layout Figure 9-1. Pad Layout 8. Ordering Information Delivery: unsawn wafers (DDW) in box Extended Type Number D (2) Type ATA2525R1xx(1)-DDW 1493 Standard type: high data rate ATA2525R3xx(1)-DDW 980 Lamp type: enhanced suppression of disturbances, secure data transmission ATA2525R5xx(1)-DDW 730 Noise type: best suppression of disturbances, low data rate Table 9-1. Pin Description Symbol Function OUT Data output VS Supply voltage GND GND IN Input pin diode Zapping f 0 adjust Versioning type adjust GND IN OUT ZappingVS ATA2525 Versioning
4854E–AUTO–10/06 ATA2525 10. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History 4854E-AUTO-10/06
- Features on page 1 changed
- Applications on page 1 changed
- Section 1 “Description” on page 1 changed
- Section 2 “Pin Configuration” on page 2 deleted
- Section 4 “Electrical Characteristics” number 3.3 on page 4 changed
- Section 4 “Electrical Characteristics” number 3.4 on page 4 changed
- Section 6 “ESD” on page 5 deleted
- Section 10 “Ordering Information” on page 10 changed 4854D-AUTO-04/06 • Put datasheet in a new template
- Section 10 “Ordering Information” on page 10 changed
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