TBA2800 ETC-unknow, TBA2800 Datasheet
TBA2800
Manufacturer Part Number
TBA2800
Description
Infrared Preamplifier Ic - Micronas
Manufacturer
ETC-unknow
Datasheet
1.TBA2800.pdf
(2 pages)
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Infrared Preamplifier IC
control systems designed with the SAA 125O/SAA 1251 or
Bipolar integrated circuit, intended
for the MAA 2000 Central Control Unit or the infrared remote-
SAA 1350/SAA 1351 integrated circuits of ITT.
The TBA 2800 preamplifier IC contains four main parts: the
gain-controlled amplifier I, the amplifier II, the pulse-separating
amplifier Ill, and the inverter IV. as shown in Fig. 1. The ampli-
TBA 2800
fier
free operation, also at bright ambient light, XI-Hz-modulated
light originating from fluorescent lamps, or at intensive infrared
light, e. g. produced by infrared sound transmission. It is also
possible, to approach almost directly the remote-control
transmitter to the receiver without producing misfunction by
overdriving the receiver.
The amplifier
separates the pulse-shaped intelligence signal from noise and
other unwanted parts. The inverter IV provided additionally
inverts the output signal available at pin 7 as negative
and thus delivers positiie output pulses at pin 8. If an additional
resistor is inserted between pin 6 and GND. the noise-immunity
as test pin and must not be connected.
is increased, but the input sensitivity decreased. Pin 10 serves
The capacitor connected from pin 2 to ground influences the
automatic gain control of amplifier I contained in the TBA 2800.
A capacitance of less than 1 PF will cause misfunction in the
distance range of 0.2 m to 2 m. Fig. 3 shows the dependence
of the transmission range on the capacitor at pin 2. Due to
tolerances of the TBA 2800 itself, the transmitter diodes’
efficiency and the receiver diode’s sensitivity. the curves of
Fig. 3 must be considered with a tolerance of about f 50%.
The curves have been established by simulation of the distance
between transmitter and receiver by means of infrared filter
glass with specified attenuation inserted between transmitter
and receiver.
Fig. 1:
I has
TBA 2800 block diagram and application circuit
a wide dynamic range and thus ensures interference-
II further amplifies the signal, and amplifier Ill
as a receiver preamplifier
pulse,
TBA 2800 in a 14-pin Dil
20 A 14 according to
Weight approx. 1.2 g
Fig. 2:
Plastic Package TO-116,
DIN 41866
Dimensions in mm
Pin Connections
10
11
12
13
14
7
8
9
Capacitor Pin Amplifier I
Supply Voltage VB
Input’s Ground, 0
Input Amplifier Ill
Output Amplifier II
Pin for Adjusting the
Separation Threshold
Negative Pulse Output
Positive Pulse Output
Output’s Ground, 0
Test Pin, leave vacant
Output Amplifier I
Ground, 0, of Amplifier II
Input Amplifier II
Input
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TBA2800 Summary of contents
Page 1
TBA 2800 Infrared Preamplifier receiver preamplifier Bipolar integrated circuit, intended for the MAA 2000 Central Control Unit or the infrared remote- control systems designed with the SAA 125O/SAA 1251 or SAA 1350/SAA 1351 integrated circuits of ITT. ...
Page 2
All voltages are referred to GND (pins 1, Absolute Maximum Ratings Supply Voltage Ambient Operating Temperature Range Storage Temperature Range Recommended Operating Conditions Supply Voltage Characteristics “C, photo diode BPW 41, Current ...