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Chroma Demodulator. NTE821 Datasheet

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Chroma Demodulator. NTE821 Datasheet
















NTE821 Demodulator. Datasheet pdf. Equivalent













Part

NTE821

Description

Integrated Circuit TV Chroma Demodulator



Feature


NTE821 Integrated Circuit TV Chroma Demo dulator Description: Specifically desig ned to match advances in color picture tube phosphors, the NTE821 is a monolit hic silicon integrated circuit in a 14 Lead DIP type package and consists of three output amplifiers, a new resisto r matrix, two double–balanced chroma demodulators, and a very stable bias ci rcuit. When used with .
Manufacture

NTE Electronics

Datasheet
Download NTE821 Datasheet


NTE Electronics NTE821

NTE821; the NTE714 subcarrier regeneration syste m and the NTE715 chroma amplifier, this device completes the typical three–b lock chroma system. Alternatively, the NTE821 chroma demodulator can be used w ith the NTE738 chroma processor to form a complete two–block chroma system. The output amplifiers are specifically designed to meet the low impedance, sho rt–circuit protected d.


NTE Electronics NTE821

riving requirements of high–level colo r output amplifiers. Internal ripple fi lter capacitors greatly reduce the high –frequency components of demodulation and thereby extend the output voltage swing capability of the output stages a nd at the same time eliminates the need for external output filtering componen ts. Features: D Output Short–Circuit Protection D Excellent S.


NTE Electronics NTE821

ubcarrier Rejection D 600mV Maximum Offs et Voltage D 2mV/°C Typical Temperatur e Stability D Good Chroma Sensitivity A bsolute Maximum Ratings: (TA = +25°C u nless otherwise specified) Operating Am bient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +85°C S torage Temperature Range, Tstg . . . . . . . . . . . . . . . . .





Part

NTE821

Description

Integrated Circuit TV Chroma Demodulator



Feature


NTE821 Integrated Circuit TV Chroma Demo dulator Description: Specifically desig ned to match advances in color picture tube phosphors, the NTE821 is a monolit hic silicon integrated circuit in a 14 Lead DIP type package and consists of three output amplifiers, a new resisto r matrix, two double–balanced chroma demodulators, and a very stable bias ci rcuit. When used with .
Manufacture

NTE Electronics

Datasheet
Download NTE821 Datasheet




 NTE821
NTE821
Integrated Circuit
TV Chroma Demodulator
Description:
Specifically designed to match advances in color picture tube phosphors, the NTE821 is a monolithic
silicon integrated circuit in a 14–Lead DIP type package and consists of three output amplifiers, a
new resistor matrix, two double–balanced chroma demodulators, and a very stable bias circuit. When
used with the NTE714 subcarrier regeneration system and the NTE715 chroma amplifier, this device
completes the typical three–block chroma system. Alternatively, the NTE821 chroma demodulator
can be used with the NTE738 chroma processor to form a complete two–block chroma system.
The output amplifiers are specifically designed to meet the low impedance, short–circuit protected
driving requirements of high–level color output amplifiers. Internal ripple filter capacitors greatly re-
duce the high–frequency components of demodulation and thereby extend the output voltage swing
capability of the output stages and at the same time eliminates the need for external output filtering
components.
Features:
D Output Short–Circuit Protection
D Excellent Subcarrier Rejection
D 600mV Maximum Offset Voltage
D 2mV/°C Typical Temperature Stability
D Good Chroma Sensitivity
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +85°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Maximum Voltage and Current Ratings (TA = +25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Table
Current in mA
Current in mA
Pin # Voltage Range in Volts Input Output Pin # Voltage Range in Volts Input Output
1 No Connection
– –8
0 to +27
Note 2
1.0
2 No Connection
– –9
0 to +20
1.0 Note 1
3 0 to +5.0
– 10
No Connection
––
4 0 to +5.0
– – 11
0 to +20
1.0 Note 1
5 No Connection
– 12
No Connection
––
6 0 to +12
– – 13
0 to +20
1.0 Note 1
7 0 to +12
– – 14
Reference
1.0 Note 2
Note 1. Maximum continuous current output is 20mA and is limited by package power dissipation.
Short circuit current is typically 50mA.
Note 2. Limited by package power dissipation.




 NTE821
Electrical Characteristics: (TA = +25°C, VCC = 24V, RL = 3.3k, Reference Input Voltage = 1VPP
unless otherwise specified)
Parameter
Test Pin
Test Conditions
Min Typ Max Unit
Static Characteristics
Quiescent Output Voltage
9, 11, 13
13.0 14.3 16.0 V
Quiescent Input Current
8 RL = , Chroma and Reference
Voltage = 0
6.0 mA
Chroma and Reference Voltage = 0
16.5 19.0 25.5 mA
Reference Input Voltage
6, 7
6.6
V
Chroma Input Voltage
3, 4
3.5
V
Differential Output Voltage
9, 11, 13 Note 3
200 600 mV
Output Temperature Coefficient
9, 11, 13 No Output Differential Voltage, Note 3
2.0 mV/°C
Dynamic Characteristics
Detector Output Voltage (BY)
13 Note 4
8 13 VPP
Chroma Input Voltage
3 BY Output = 5VPP, Note 5
300 700 mVPP
Detector Output Voltage (GY)
9 Adjust BY Output to 5VPP, Note 6
1.4 1.75 2.1 VPP
Detector Output Voltage (RY)
11 Adjust BY Output to 5VPP, Note 6
4.3 4.65 5.0 VPP
Relative Output Phase (BY to RY) 1311 BY Output = 5VPP
85 90 95 deg
Relative Output Phase (BY to GY) 139 BY Output = 5VPP
236 244 252 deg
Demodulator Unbalanced Voltage 9, 11, 13 No Chroma Input Voltage and Normal 250 500 mVPP
Reference Signal Input Voltage
Residual Carrier and Harmonics
Reference Input Resistance
9, 11, 13 With Input Signal Voltage, Normal Refer-
ence Signal Voltage and BY = 5VPP
6, 7 Chroma Input = 0
1.5 VPP
2.0 k
Reference Input Capacitance
6, 7 Chroma Input = 0
6.0 pF
Chroma Input Resistance
3, 4
1.0 k
Chroma Input Capacitance
3, 4
2.0 pF
Note 3. With chroma input signal voltage = 0 and normal reference input signal voltage (1VPP), all
output voltages will be within specified limits and will not differ from each other by greater
than 0.6V.
Note 4. With normal reference input signal voltage, adjust chroma input signal voltage to 1.2VPP.
Note 5. With normal reference input signal voltage, adjust chroma input signal voltage until the BY
output voltage = 5VPP. The chroma input voltage at this point should be equal to or less than
0.7VPP.
Note 6. With normal reference input signal voltage, adjust the chroma input signal until the BY out-
put voltage = 5VPP. At this point, the RY and GY voltages will fall within the specified limits.




 NTE821
Pin Connection Diagram
N.C. 1
N.C. 2
Chroma Input 3
Chroma Input 4
N.C. 5
Ref Subcarrier 6
Ref Subcarrier 7
14 GND
13 B Y Output
12 N.C.
11 R Y Output
10 N.C.
9 G Y Output
8 VCC
14 8
17
.785 (19.95) Max
.300 (7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min




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