JRC NJW1138 User Manual

NJW1138

P R E L I M I N A LY

AUDIO PROCESSOR

■GENERAL DESCRIPTION

The NJW1138 is an audio processor. It includes all of

functions processing audio signal for TV, such as tone control, balance, volume, mute, NJRC original surround, and AGC functions.

The NJRC original surround system reproduces natural surround sound and clear vocal orientation.

All of internal status and variables are controlled by I2C BUS interface.

■ PACKAGE OUTLINE

NJW1138L NJW1138M

■ FEATURES
● Operating Voltage	8 to 13V

●I2C BUS Interface

●AGC Circuit (It reduces volume difference among input sources.)

●eala(NJRC Original Surround)

●Simulated Surround

●Bi-CMOS Technology

● Package Outline

SDIP30, SDMP30

■ BLOCK DIAGRAM

VOL1

eala

TONE

VOL2

I2C Bus

Interface

AGC

&

Simulated

Surround

VOL1

TONE

VOL2

Bias

- 1 –F

NJW1138

■ PIN FUNCTION

	INa	INb
1			30
	NC	NC
2			29
	NC	NC
3			28
	OUT1a
4		OUT1b	27
	IN2a	IN2b
5			26
	TONE-Ha	TONE-Hb
6			25
	TONE-La	TONE-Lb
7			24
	OUT2a	OUT2b
8			23
	AGC	SR-FIL
9			22
	SS-FIL	VREF
10			21
	CVB	CTH
11			20
	CVA	CTL
12			19
	SDA	AUX0
13			18
	SCL	AUX1
14			17
	GND	Vcc
15			16

No.	Symbol	Function	No	Symbol	Function
1	IN1a	Ach Input	16	Vcc	Power Supply Pin
2	NC	Non Connect	17	AUX1	Auxiliary Output1
3	NC	Non Connect	18	AUX0	Auxiliary Output0
4	OUT1a	Ach Output for the Other Accessories	19	CTL	DAC Output for Tone Low Frequency
5	IN2a	Ach Input From the Other Accessories	20	CTH	DAC Output for Tone High Frequency
6	TONE-Ha	Ach Treble Filter	21	VREF	Reference Voltage
7	TONE-La	Ach Bass Filter	22	SR-FIL	NJRC Original Surround Filter
8	OUT2a	Ach Output	23	OUT2b	Bch Output
9	AGC	AGC Filter	24	TONE-Lb	Bch Bass Filter
10	SS-FIL	Simulated Stereo Filter	25	TONE-Hb	Bch Treble Filter
11	CVB	DAC Output for Bch Volume & Balance	26	IN2b	Bch Input from the Other Accessories
12	CVA	DAC Output for Ach Volume & Balance	27	OUT1b	Bch Output for the Other Accessories
13	SDA	SDA Data Input (I2C BUS)	28	NC	Non Connect
14	SCL	SCL Data Input (I2C BUS)	29	NC	Non Connect
15	GND	GND	30	IN1b	Bch Input

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NJW1138

■ ABSOLUTE MAXIMUM RATING (Ta=25°C)

PARAMETER	SYMBOL	RATING	UNIT
Supply Voltage	V+	14	V
Power Dissipation	PD	700	mW
Operating Temperature Range	Topr	-20 to +75	°C
Storage Temperature Range	Tstg	-40 to +125	°C

■ ELECTRICAL CHARACTERISTICS
( Ta=25°C, V+=9V, Rg=600Ω	, RL=47kΩ , Vin=100mVrms/1kHz unless otherwise specified)
PARAMETER		SYMBOL	TEST CONDITION	MIN.	TYP.	MAX.	UNIT
Operating Voltage		V+		8.0	9.0	13.0	V
Supply Current		ICC	No Signal	-	10	25	mA
Reference Voltage		VREF	No Signal	4.0	4.5	5.0	V
Maximum Input Voltage		VIM	VOL=-20dB,THD=1%	2.8	3.0	-	Vrms
Maximum Output Voltage		VOM	OUTPUT	-	2.5	-	Vrms
			VOL=0dB,THD=1%
Channel Balance		GCB	VOL=0dB	-1.5	0.0	1.5	dB
Balance Boost A		BABST	CHS=”0”,BAL=”11111”	-2.0	0.0	2.0	dB
Balance Cut A		BACUT	CHS=”1”,BAL=”11111”	-	-	-70	dB
			Vin = 1Vrms
Balance Boost B		BBBST	CHS=”1”,BAL=”11111”	-2.0	0.0	2.0	dB
Balance Cut B		BBCUT	CHS=”0”,BAL=”11111”	-	-	-70	dB
			Vin = 1Vrms
Total Harmonic Distortion		THD	Vo=0.5Vrms	-	-	0.5	%
			BW=400Hz to 30kHz
Maximum Gain		GVMAX	VOL= 0dB	-2.0	0.0	2.0	dB
Minimum Gain		GVMIN	VOL= MUTE	-	-	-70	dB
Channel Separation		CS	Vin = 2Vrms	-	-	-70	dB
Output Noise 1		VNO1	VOL = 0dB	-	-90	-85	dBV
			BW=400Hz to 30kHz	-	(31.6)	(56.2)	( Vrms)
Output Noise 2		VNO2	VOL = MUTE	-	-106	-96	dBV
			BW = 400Hz to 30kHz	-	(5.0)	(15.8)	( Vrms)
AUX Output Voltage		VAUX	Logic Output : High	4.5	-	5.0	V
			Logic Output : Low	0	-	0.3

BW : Band Width

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NJW1138

♦ TONE CONTROL

	PARAMETER	SYMBOL	TEST CONDITION	MIN.	TYP.	MAX.	UNIT
	High Frequency Boost	HFBST	BCT=”1”,TREB=”1111”,	12.5	15.0	17.5	dB
			f=10kHz
	High Frequency Flat	HFFLT	TRBE=”0000”,f=10kHz	-2.0	0.0	2.0	dB
	High Frequency Cut	HFCUT	BCT=”0”,TRBE=”1111”,	-17.5	-15.0	-12.5	dB
			f=10kHz
	Low Frequency Boost	LFBST	BCB=”1”,BASS=”1111”,	12.5	15.0	17.5	dB
			f=100Hz
	Low Frequency Flat	LFFLT	BASS=”0000”,f=100Hz	-2.0	0.0	2.0	dB
	Low Frequency Cut	LFCUT	BCB=”0”,BASS=”1111”,	-17.5	-15.0	-12.5	dB
			f=100Hz

♦ SUB-TONE CONTROL

	PARAMETER	SYMBOL	TEST CONDITION	MIN.	TYP.	MAX.	UNIT
	High Frequency Boost	SHFBST	BCST=”1”,	2.0	3.0	4.0	dB
			SUB-TREB=”11”,f=10kHz
	High Frequency Cut	SHFCUT	BCST=”0”,	-4.0	-3.0	-2.0	dB
			SUB-TREB=”11”,f=10kHz
	Low Frequency Boost	SLFBST	BCSB=”1”,	2.0	3.0	4.0	dB
			SUB-BASS=”11”,f=100Hz
	Low Frequency Cut	SLFCUT	BCSB=”0”,	-4.0	-3.0	-2.0	dB
			SUB-BASS=”11”,f=100Hz

♦ AGC CONTROL(AGC-ON)

PARAMETER	SYMBOL	TEST CONDITION	MIN.	TYP.	MAX.	UNIT
AGC Boost	AGCBST	Vin=50mVrms, f=1kHz	1.5	3.5	5.5	dB
AGC Flat1	AGCFLT1	Vin=150mVrms, f=1kHz	-2.5	0.0	2.5	dB
AGC Flat2	AGCFLT2	Vin=300mVrms, f=1kHz	-2.5	0.0	2.5	dB
AGC Flat3	AGCFLT3	Vin=400mVrms, f=1kHz	-2.5	0.0	2.5	dB
AGC Flat4	AGCFLT4	Vin=540mVrms, f=1kHz	-2.5	0.0	2.5	dB
AGC Cut	AGCCUT	Vin=2Vrms, f=1kHz	-14	-10	-6.0	dB

♦ SURROUND (SURROUND-ON)

	PARAMETER	SYMBOL		TEST CONDITION	MIN.	TYP.	MAX.	UNIT
	Surround Gain1	SRGAIN1	Ain→	Aout, f=100Hz	6.0	8.0	10.0	dB
			SUR0=”0”, SUR=”1”
	Surround Gain2	SRGAIN2	Ain→	Bout, f=100Hz	1.6	3.6	5.6	dB
			SUR0=”0”, SUR=”1”
	Surround Gain3	SRGAIN3	Ain→	Aout, f=100Hz	10.7	12.7	14.7	dB
			SUR0=”1”, SUR=”1”
	Surround Gain4	SRGAIN 4	Ain→	Bout, f=100Hz	8.4	10.4	12.4	dB
			SUR0=”1”, SUR=”1”
	Simulated Surround Gain1	SRSIM1	Ain+Bin→ Aout, f=1kHz		1.0	3.0	5.0	dB
			SUR0=”1”, SUR=”0”
	Simulated Surround Gain2	SRSIM2	Ain+Bin→ Bout, f=1kHz		1.0	3.0	5.0	dB
			SUR0=”1”, SUR=”0”

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NJW1138

■ I2C BUS BLOCK CHARACTERISTICS (SDA,SCL)

PARAMETER		SYMBOL	MIN.	TYP.	MAX.	UNIT
High Level Input Voltage		VIH	3.0	-	5.0	V
Low Level Input Voltage		VIL	0	-	1.5	V
High Level Input Current		IIH	-	-	10	µA
Low Level Input Current		IIL	-	-	10	µA
Low Level Output Voltage (3mA at SDA pin)		VOL	0	-	0.4	V
Maximum Output Current		IOL	-3.0	-	-	mA
Maximum Clock Frequency		fSCL	0	-	100	kHz
Data Change Minimum Waiting Time		tBUF	4.7	-	-	µs
Data Transfer Start Minimum Waiting Time		tHD:STA	4.0	-	-	µs
Low Level Clock Pulse Width		tLOW	4.7	-	-	µs
High Level Clock Pulse Width		THIGH	4.0	-	-	µs
Minimum Start Preparation Waiting Time		tSU:STA	4.7	-	-	µs
Minimum Data Hold Time		tHD:DAT	5.0	-	-	µs
Minimum Data Preparation Time		tSU:DAT	250	-	-	ns
Rise Time		tR	-	-	1.0	µs
Fall Time		tF	-	-	300	ns
Minimum Stop Preparation Waiting Time		tSU:STO	4.7	-	-	µs
I2C BUS Load Condition: Pull up resistance 4kΩ	(Connected to +5V)

Load capacitance 200pF (Connected to GND)

SDA
tBU		tR		tF		tHD:ST
SCL
	tHD:ST	tLOW	tHD:DA	tHIGH	tSU:DA	tSU:ST	tSU:ST
P	S				Sr		P

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NJW1138

TERMINAL DESCRIPTION
No.	SYMBOL	FUNCTION	EQUIVALENT CIRCUIT		VOLTAGE
				V+
1	INa	Ach Input terminal	1,30 pin	20k
					V+/2
30	INb	Bch Input terminal
				80k
				Vref

	4	OUT1a	Ach Output for the Other Accessories		4, 8
				50	23,27pin
	8	OUT2a	Ach Output
				FB	V+/2
	23	OUT2b	Bch Output
	27	OUT1b	Bch Output for the Other Accessories

			5.3 k	10pin
10	SS-FIL	Simulated Stereo Filter terminal	FB	V+/2

	6	TONE-Ha			10k	6, 25pin
			Treble(tone control) filter terminal	FB		V+/2
	25	TONE-Hb

	7	TONE-La		12k	7, 24pin
			Bass(tone control) filter terminal	12k	V+/2
	24	TONE-Lb
				FB

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NJW1138

TERMINAL DESCRIPTION

No. SYMBOL	FUNCTION	EQUIVALENT CIRCUIT						VOLTAGE

			Capacitor connection terminal for			9pin
	9	AGC			4k	-
			AGC attack and recovery time setting	400
					400

	11	CVB	11,12pin	8k
			DAC output terminal for Bch volume control	-
	12	CVA	DAC output terminal for Ach volume control

5V

13	SDA	I2C data terminal	4k	13pin	-

8k

5V

14	SCL	I2C clock terminal	4k	14pin	-

8k

5	TONE INa	Ach Input from the Other Accessories	5,26pin	24k
				V+/2
26	TONE INb	Bch Input from the Other Accessories

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