View U2535B_297375.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

U2535B
Preamplifier for IR Remote Control
Description
The IC U2535B is a complete IR receiver for data communication. The PIN photodiode converts the transmitted IR telegram into electronic input signals. This is separated by a special input circuit. The characteristics (filter, gain) of the following amplifier are determined by external components. The signal detector, consisting of a comparator, an integrator and a Schmitt trigger, forms the input signal to an output pulse that can be interfaced to a microcomputer.
Features
D Low current requirement (typical 260 mA/ 12 V) D Carrier frequencies 20 to 100 kHz D Supply voltages:
5 or 7 to 16 V with internal stabilization
Applications
D Keyless entry D Remote control D Wireless data transfer
D Filter characteristics and gain are specified by few
external components
D Demodulator with Schmitt trigger D Open collector output
Ordering Information
Extended Type Number U2535B-FP Package SO8 Remarks
Block Diagram
95 9958
5 VS Supply voltage for PIN diode 7 IN 8 - + +VCC + - 4 + - Integrator OSW VS1
1 kW 10 mF +V
10 mF
6 GND A1 C1
1 R1
2 A0 C2
3 C3 C3
R2
Figure 1. Block diagram
Rev. A2, 15-Oct-98
1 (6)
U2535B
Pin Description
AI AO C3 OSW 1 8 Pin 1 IN Symbol Function AI Inverting input of bandpass amplifier, pin connection for external filter function AO Output of bandpass amplifier C3 Capacitor at Pin 3 to reject (suppress) ripple during transmission, also functions as delay time for reference voltage of the comparator OSW Switching output Open collector output which switches with time delay and turns to LOW (transistor switched ON) when the signal is identified at Pin 2. VS Supply voltage The integrated Z-diode (typically 17 V) protects the circuit against positive voltage spikes GND Ground VS1 Unregulated supply voltage for 5 V operation IN Input connection for photodiode with regulated bias voltage
2 3
2
7
VS1 GND 4
3
6
4
95 10323
5
VS
Figure 2. Pinning
5
6 7 8
Absolute Maximum Ratings
Reference point Pin 6, unless otherwise specified Parameters Supply-voltage range Pin 5 Supply currents: Pin 5 tp 250 ms Pin 5 Input voltages Pin 1 Pin 4 Pin 8 Output currents Pins 2 and 4 Junction temperature Storage-temperature range Ambient-temperature range Symbol VS IS iS VA(I) V0(SW) VIN I0 Tj Tstg Tamb Value -0.3 to +16 20 150 -0.3 to 5 -0.3 to 16 -0.3 to 5 5 125 -40 to +125 -40 to +105 Unit V mA mA V V V mA C C C
Thermal Resistance
Parameters Junction ambient Symbol RthJA Value 180 Unit K/W
2 (6)
Rev. A2, 15-Oct-98
Preliminary Information
U2535B
Electrical Characteristics
Tamb = 25C, reference point Pin 6, test circuit, unless otherwise specified Parameters Supply currents Internal stabilization Maximum input current Low-level voltage Leakage current Input stage, amplifier Cut-off frequency Gain Test Conditions / Pins VS1 = 5 V, IIN = 0, Pin 7 Pin 5 VS = 12 V, IIN =0, VS = 12 V, IIN = 0, Pin 7 VS1 = 5 V, VIN = 0, Pin 8 VS1 = 5 V, IOL = 0.5 mA Pin 4 VS1 = 5 V, V0 = 12 V, Pin 4 Symbol IS1 IS VS1 -IIN VOL IOH fL fH vi = 2 mVrms, f = 40 kHz f = 100 kHz td 200 ms, f = 40 kHz, Pin 2 f = 40 kHz, VA0 = 1 Vrms see figure 4 f = 40 kHz, VA0 = 1 Vrms see figure 4 Gv Gv VA0 td ts 50 100 Min. 140 200 4.9 0.8 Typ. Max. 200 320 5.4 1.2 0.2 1 15 100 47 46 50 49 150 90 150 Unit
mA mA
V mA V
mA
kHz kHz dB dB mVrms
Detector Threshold voltage Delay time Storage time
ms ms
Test Circuit
95 9959
7 5 300 kW Ri Vi C2 IIN 1 2 300 kW R1 Ci 100 nF 1 kW R2 C3 22 nF 3 8
+5 V
U2535B
47 kW 4 Output 6
10 nF
Figure 3. Test circuit
Rev. A2, 15-Oct-98
3 (6)
U2535B
95 9960
V VAO
VL
td 400 T
ts t
Figure 4. Waveforms for td and ts measurement
Application Circuit
10 mF 10 mF +12 V 1 kW 8 7 6 5
U2535B
95 9961
1 300 kW R1
2
3
4
mC
C2 100 pF C3 47 nF +
C1 680 pF R2 1.2 kW
22 kW
Figure 5. Application circuit
4 (6)
Rev. A2, 15-Oct-98
Preliminary Information
U2535B
Bandpass Filter Design
Center frequency fO
+ 2p
R1
1
1 C1
1
R2
C2 R1 >> R2 C1 C2
GAIN
[ R R(C )C C )
2 1 2
y
Bandwidth
[ 2p
C1 R1
)C
2
C1
C2
BW << fO
Note: R1 should be about 300 kW. Results can be influenced by feedback (Pin 2
! Pin 8)
Package Information
Package SO8
Dimensions in mm
5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 0.2 3.8 6.15 5.85 5.2 4.8 3.7
technical drawings according to DIN specifications 13034
1
4
Rev. A2, 15-Oct-98
5 (6)
U2535B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC Semiconductors products for any unintended or unauthorized application, the buyer shall indemnify TEMIC Semiconductors against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423
6 (6)
Rev. A2, 15-Oct-98
Preliminary Information

▲Up To Search▲

Price & Availability of U2535B

	To Download U2535B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .