NTE821 Demodulator Datasheet pdf - Chroma Demodulator. Equivalent, Catalog

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; 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.

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.

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

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

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.

Electrical Characteristics: (TA = +25°C, VCC = 24V, RL = 3.3kΩ, Reference Input Voltage = 1VP–P

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 –

Chroma Input Voltage

3, 4

– 3.5 –

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 (B–Y)

13 Note 4

8 13 – VP–P

Chroma Input Voltage

3 B–Y Output = 5VP–P, Note 5

– 300 700 mVP–P

Detector Output Voltage (G–Y)

9 Adjust B–Y Output to 5VP–P, Note 6

1.4 1.75 2.1 VP–P

Detector Output Voltage (R–Y)

11 Adjust B–Y Output to 5VP–P, Note 6

4.3 4.65 5.0 VP–P

Relative Output Phase (B–Y to R–Y) 13–11 B–Y Output = 5VP–P

85 90 95 deg

Relative Output Phase (B–Y to G–Y) 13–9 B–Y Output = 5VP–P

236 244 252 deg

Demodulator Unbalanced Voltage 9, 11, 13 No Chroma Input Voltage and Normal – 250 500 mVP–P

Reference Signal Input Voltage

Residual Carrier and Harmonics

Reference Input Resistance

9, 11, 13 With Input Signal Voltage, Normal Refer-

ence Signal Voltage and B–Y = 5VP–P

6, 7 Chroma Input = 0

–

– 1.5 VP–P

2.0 – kΩ

Reference Input Capacitance

6, 7 Chroma Input = 0

– 6.0 – pF

Chroma Input Resistance

3, 4

– 1.0 – kΩ

Chroma Input Capacitance

3, 4

– 2.0 – pF

Note 3. With chroma input signal voltage = 0 and normal reference input signal voltage (1VP–P), 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 1.2VP–P.

Note 5. With normal reference input signal voltage, adjust chroma input signal voltage until the B–Y

output voltage = 5VP–P. The chroma input voltage at this point should be equal to or less than

0.7VP–P.

Note 6. With normal reference input signal voltage, adjust the chroma input signal until the B–Y out-

put voltage = 5VP–P. At this point, the R–Y and G–Y voltages will fall within the specified limits.

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

.785 (19.95) Max

.300 (7.62)

.200 (5.08)

Max

.100 (2.45)

.600 (15.24)

.099 (2.5) Min

Chroma Demodulator. NTE821 Datasheet

Chroma Demodulator. NTE821 Datasheet

NTE821 Demodulator. Datasheet pdf. Equivalent

NTE821

Integrated Circuit TV Chroma Demodulator

NTE Electronics

NTE821

Integrated Circuit TV Chroma Demodulator

NTE Electronics