TCA965 ,Function and Industrial ICsFunctional DescriptionAmplifier Amp 3 increases the voltage of the reference source R to V = 2 x V ..
TCA965 ,Function and Industrial ICsFeaturesl Two window settings– direct setting of lower and upper edgevoltage (window edges)– indire ..
TCA965 ,Function and Industrial ICsTCA 965 BWindow DiscriminatorPreliminary Bipolar IC
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TCA965
Function and Industrial ICs
SHIEMIENS
Window Discriminator TCA 965 B
Preliminary Bipolar IC
Features
0 Two window settings
- direct setting of lower and upper edge
voltage (window edges)
- indirect setting by window center
voltage and half window width
o Adjustable hysteresis
tt Digital outputs with open collectors
for currents up to 50 mA P-DIP-bi-l
0 Adjustable reference voltage VStab
Type Ordering Code Package
TCA 965 B Q67000-A8338 P-DIP-14-1
Cl Not for new design
The window discriminator compares an input voltage to a defined voltage window. The
digital outputs show whether the input voltage is below, within or above this window.
The TCA 965 B window discriminator is especially suitable as a tracking or
compensating controller with a dead band in control engineering and for the selection of
DC voltages within a certain tolerance of the required setpoint value in measurement
engineering. When it is used as a Schmitt trigger, switching frequencies up to a typical
value of 50 kHz are possible.
Semiconductor Group 1 1998-02-10
SIEMENS TCA 965B
Functional Description
Amplifier Amp 3 increases the voltage of the reference source R to VStab = 2 x VREF. The
amplification factor can be altered by external wiring. With direct setting of the window,
the input voltage appears on amplifier Amp 1 (h), the upper edge voltage on
comparator K2 (Pt) and the lower edge voltage on comparator K1 (V7).
With indirect setting of the window, the input voltage appears on inputs K, and V7, while
the center voltage is connected to amplifier A1 (ks).
The voltage applied to the input (V9) of amplifier Amp 2 is subtracted symmetrically from
the output voltage of amplifier Amp1 and added. The comparators switch with
hysteresis. The logic gates have open-collector outputs.
If the inhibit input A or B is connected to ground, output A or B will always be high.
+Vs VREF
O -- T
11 1 5
20 kn 20m
Amp3 10 o vStab
v70 7 p IT 1 2 A
- K1 - o——o
4 o InhibitA
Amp1 L'l 13 O C
hc tr ’ 1 3
v=1 o--C) o
12 . .
Amp 2 o Inhibit B
9 "t D Jf
hc tr 'r-to-s K2 1 14 B
V60_6_l—
IEB00091
Outputs A, B, C, D are open-collector
Block Diagram
Semiconductor Group 2 1998-02-10
