NTE NTE1859 Datasheet

NTE1859

Integrated Circuit

dbx TV Noise Reduction Integrated Circuit

Description:

The NTE1859 is an integrated circuit designed for the dbx–TV noise reduction decode circuit for multi­channel TV sound systems. This device contains a voltage controlled amplifier, a variable de–empha­sis circuit with new configuration and RMS detectors with completely integrated active band pass fil­ters, and offers the complete dbx–TV noise reduction decoder only with a few external components.

Features:

D Integrated Band Pass Filters using Active Filtering Technique and Thin Film Structure with

High Capacitance

D Variable De–emphasis Circuit with New Circuit Configuration
D Minimum Number of External Components
D Wide Operation Voltage Range: 4.7V to 16V

Absolute Maximum Ratings:

Power Supply Voltage, V
Allowable Power Dissipation, P
Operating Temperature Range, T
Storage Temperature Range, T

(TA = +25°C unless otherwise specified)

CC

D

opr

stg

Recommended Operating Voltage:

Power Supply Voltage, V

Electrical Characteristics:

CC

(TA = +25°C, VCC = +9V Reference Level: 0dB = –5dBm (436mVrms)
unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Consumption Current
Decode Characteristics

I

CC

Vod–1
Vod–2
Vod–3
Vod–4
Vod–5
Vod–6

No Signal
Vi = –5dB, f = 300Hz
Vi = –15dB, f = 300Hz
Vi = –30dB, f = 300Hz
Vi = 0dB, f = 1kHz
Vi = –10dB, f = 1kHz
Vi = –20dB, f = 1kHz

17V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

715mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–20° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5V to 15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.0 5.0 6.3 mA

5.5 7.0 8.5 dB
–14.5 –13.0 –11.5 dB
–44.5 –43.0 –41.5 dB

1.3 3.3 5.3 dB
–19.4 –17.4 –15.4 dB
–39.6 –37.6 –35.6 dB

Vod–7
Vod–8
Vod–9

Vi = 0dB, f = 8kHz
Vi = –10dB, f = 8kHz
Vi = –20dB, f = 8kHz

–4.3 –1.8 0.7 dB
–30.9 –28.4 –25.9 dB
–45.2 –42.7 –40.2 dB

Electrical Characteristics (Cont’d): (TA = +25°C, VCC = +9V Reference Level: 0dB = –5dBm

(436mVrms) unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

VCA Filter Characteristics

Vemp. Filter Characteristics

Total Harmonic Distortion Ratio
Maximum Output Voltage

Output Noise Level
Timing Current
Center Potential

Vfp–1
Vfp–2
Vfg–1
Vfg–2

THD
Vom–1
Vom–2

V

I

time

VCC/2 4.3 4.5 4.7 V

f = 3kHz, Vi = 0dB, refer to 1kHz
f = 8kHz, Vi = 0dB, refer to 1kHz
f = 5kHz, Vi = 0dB, refer to 8kHz
f = 2kHz, Vi = 0dB, refer to 8kHz
f = 1kHz, Vi = –3dB
f = 300Hz, THD = 1.5%
f = 8kHz, THD = 1.5%
A weight

on

–5.5 –4.0 –2.5 dB

–13.0 –11.0 –9.0 dB

–9.4 –7.4 –5.4 dB

–32.3 –28.8 –25.3 dB

– 0.1 0.3 %

11.0 12.5 – dB
–2.0 1.0 – dB

– –104 –80 dB

(7.1) 7.5 (7.9) µA

Electrical Characteristics: (TA = +25°C, VCC = +9V Reference Level: 0dB = –5dBm (436mVrms)

Note 1 unless otherwise specified)

Parameter Symbol

Consumption Current I

CC

1 2 3 4 5 6 7

OFF – – – – b b

Decoding Characteristics

300Hz, –5dB

Vod–1 ON – b b b b b
300Hz, –15dB Vod–2 ON – b b b b b
300Hz, –30dB Vod–3 ON – b b b b b
1kHz, 0dB Vod–4 ON – b b b b b
1kHz, –10dB Vod–5 ON – b b b b b
1kHz, –20dB Vod–6 ON – b b b b b
8kHz, 0dB Vod–7 ON – b b b b b
8kHz, –10dB Vod–8 ON – b b b b b
8kHz, –15dB Vod–9 ON – b b b b b

VCA Filter Characteristics

3kHz

Vfp–1 ON a a b b b b

8kHz Vfp–2 ON a a b b b b

Vemp Filter Characteristics

5kHz

Vfg–1 ON b a b b b b

2kHz Vfg–2 ON b a b b b b

Total Harmonic Distortion Ratio THD ON – b b b b b
Maximum Output Voltage

300Hz

Vom–1 ON – b b b b b

8kHz Vom–2 ON – b b b b b

Output Noise Level Von OFF – b a a b b
Middle Point Potential VCC/2 OFF – – – – b b

Switch Condition

Note 1. It suffices that a or b is inserted into (–).