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PDF T2525 Data sheet ( Hoja de datos )
| Número de pieza | T2525 | |
| Descripción | IR RECEIVER ASSP | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• No Ewxtwewrn.DaaltCaSohmeepto4Un.ecnomts Except PIN Diode
• Supply-voltage Range: 4.5V to 5.5V
• Highest Sensitivity Due to Automatic Sensitivity Adaption (AGC) and Automatic Strong
Signal Adaption (ATC)
• Highest Immunity Against Disturbances from Daylight and Lamps
• Available for Carrier Frequencies between 30 kHz to 76 kHz; Adjusted
by Zener Diode Fusing
• TTL and CMOS Compatible
• Suitable Minimum Burst Length ≥ 10 Pulses/Burst
Applications
• Home Entertainment Applications (Audio/Video)
• Home Appliances
• Remote Control Equipment
IR Receiver
ASSP
T2525
1. Description
The IC T2525 is a complete IR receiver for data communication that was developed
and optimized for use in carrier-frequency-modulated transmission applications. The
IC offers highest sensitivity as well as highest suppression of noise from daylight and
lamps. The T2525 is available with broadest range of carrier frequencies (30, 33, 36,
37, 38, 40, 44, 56, 76 kHz) and 5 different noise suppression regulation types (stan-
dard, lamp, noise, short burst, data rate) covering requirements of high-end remote
control solutions (please refer to selection guide available for T2525/ATA2526). The
T2525 operates in a supply voltage range of 4.5V to 5.5V.
The function of T2525 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 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.
4657F–AUTO–10/06
1 page  
T2525
5. Electrical Characteristics (Continued)
Tamb = 2w5w°Cw.,DVaSta=Sh5eVetu4nUl.ecsosmotherwise specified.
No. Parameters
Test Conditions
Pin Symbol Min. Typ. Max. Unit Type*
Test signal:
see Figure 6-6 on page 8
VS = 5 V, Tamb = 25°C,
Maximum detection
IIN_DC = 1 µA;
3.5 threshold current with square pp,
VIN > 0V
burst N = 16,
f = f0; tPER = 10 ms,
Figure 6-6 on page 8;
BER = 5%(2)
3
IEemax
–400
µA D
4 Controlled Amplifier and Filter
4.1
Maximum value of
variable gain (CGA)
GVARMAX
51
dB D
4.2
Minimum value of
variable gain (CGA)
GVARMIN
-5
dB D
4.3
Total internal
amplification(3)
GMAX
71 dB D
4.4
Center frequency fusing
accuracy of bandpass
VS = 5V, Tamb = 25°C
f0_FUSE
–3
f0
+3 %
A
4.5
Overall accuracy center
frequencyofbandpass
f0
–6.7 f0 +4.1 %
C
BPF bandwidth:
type N0 - N3
4.6
BPF bandwidth:
type N6, N7
–3 dB; f0 = 38 kHz; see
Figure 6-4 on page 7
–3 dB; f0 = 38 kHz
Figure 6-4 on page 7
B
B
3.5 kHz C
5.4 kHz C
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes: 1. Depending on version, see “Ordering Information”
2. BER = Bit Error Rate; e.g., BER = 5% means that with P = 20 at the input pin 19...21 pulses can appear at the pin OUT
3. After transformation of input current into voltage
5.1 ESD
All pins ⇒2000V HBM; 200V MM, MIL-STD-883C, Method 3015.7
5.2 Reliability
Electrical qualification (1000h) in molded SO8 plastic package
4657F–AUTO–10/06
5
5 Page 
T2525
10. Revision History
www.DataSheet4U.com
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
4657F-AUTO-10/06
• Features on page 1 changed
• Applications on page 1 changed
• Section 1 “Description” on page 1 changed
• Section 5 “Electrical Characteristics” number 3.3 and 3.4 on page 4
changed
• Section 8 “Ordering Information” on page 10 changed
• Section 9 “Pad Layout” on page 10 changed
4657E-AUTO-04/06
• Put datasheet in a new template
• Section 8 “Ordering Information” on page 10 changed
4657F–AUTO–10/06
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet T2525.PDF ] | |
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