NJM2549 WIDE BAND FM IF DEMODULATOR GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2549 is a wide band IF IC with a maximum IF input frequency of 15 MHz. It includes an IF Amplifier, Quadrature Detector, RSSI and IF Balanced Output. NJM2549RB2 MAIN APPLICATIONS RF ID Radar detector Wireless Infrared Communication System Voice Transmission System A few MHz band Signal Detector FEATURES Wide Range Operating Voltage Low Operating Current Wide Range IF Input Frequency 2.7V to 9V (recommended supply voltage) 3mA (standard) 10.7MHz (standard) 100kHz to 15MHz (reference value) DC to 1MHz (reference value) Wide Band FM Detector Range RSSI Quick Response High FM Detection Sensitivity IF Amplifier with Balanced Output Bipolar Technology Package Outline 22dBuV (- 3dB Limiting Sensitivity) TVSP10 BLOCK DIAGRAM AF OUT QUAD IN IF OUT1 IF OUT2 RSSI OUT 10 9 8 7 6 QUAD DET IF AMP 1 V Ver.2010-06-24 + RSSI 2 3 4 5 IF IN IF DEC1 IF DEC2 GND -1- NJM2549 ABSOLUTE MAXIMUM RATINGS PARAMETER (Ta=25°C) SYMBOL RATINGS UNIT + Supply Voltage V 10 V Power Dissipation PD 300 mW Operating Temperature Topr - 40 to + 85 °C Storage Temperature Tstg - 50 to + 125 °C RECOMMENDED OPERATIONAL CONDITION PARAMETER Supply Voltage SYMBOL TEST CONDITIONS V+ (Ta=25°C) MIN. TYP. MAX. UNIT 2.7 3 9 V ELECTRICAL CHARACTERISTICS (Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 80dBuV, fdev = ± 10kHz, fmod = 1kHz, unless otherwise noted) PARAMETER Current Consumption SYMBOL Iccq TEST CONDITIONS No Signal, Test Circuit 1 MIN. TYP. MAX. UNIT - 3 3.7 mA 70 75 80 dB -3 0 3 IF IF Input / Output Gain IF Output Gain Frequency Characteristics G IF f IF1 f IF2 IF Amplifier Input Resistance RI IF IF Output Level VO IF Duty Ratio of Wave IF Output DR IF IF Output Current Ver.2010-06-24 I OIF IF IN = 20dBuV , Test Circuit 4 The ratio from the gain at 10.7MHz to the gain at 1MHz, Test Circuit 4 The ratio from the gain at 10.7MHz to the gain at 15MHz, Test Circuit 4 2 - 4 pin Resistance, Test Circuit 3 RL = 15kΩ, No Modulation, Test Circuit 4 RL = 15kΩ, No Modulation, Test Circuit 4 No Signal, Test Circuit 4 dB -4 -1 2 8.5 10 11.5 kΩ 350 425 500 mVpp 44 50 58 % 230 290 350 uA -2- NJM2549 PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT DETECTION IF IN = 10.62MHz, No Modulation, Test Circuit 1 IF IN = 10.7MHz, No Modulation, Test Circuit 1 IF IN = 10.83MHz, No Modulation, Test Circuit 1 - 0.1 0.3 0.8 1.1 1.4 2.7 2.9 - VO AC1 Test Circuit 1 120 150 180 VO AC2 IF IN = 3.56667MHz, 100dBuV, Test Circuit 1 VO DC1 Demodulated DC Level VO DC2 VO DC3 Demodulated Signal Level Demodulated Signal Level of IF/3 12dB SINAD Sensitivity mVrms 12dBS/N Test Circuit 1 - 3dB Limiting Sensitivity PI LIM Signal to Noise Ratio S/N AM Rejection Ratio AMR Total Harmonic Distortion THD AF Output pin Bias Current IO AF Demodulated Signal Frequency Characteristics fDET V 100 130 160 - 33 - - 22 - - 45 - - 45 - - 0.5 - % 160 205 250 uA - -2 - dB - 10 50 dBuV Measured at -3dB, Test Circuit 1 Ratio of S+N and N, Test Circuit 1 AM = 30%, Test Circuit 1 fdev = ± 30kHz, Test Circuit 1 No Signal, Test Circuit 4 fdev = ±100kHz, fmod = 1kHz to 1MHz, Gain deflection, Test Circuit 6 dB RSSI V RSSI1 RSSI Output Voltage V RSSI2 V RSSI3 V RSSI4 RSSI Output Resistance RSSI Dynamic Range RO RSSI DRSSI No Signal, Test Circuit 1 IF IN = 45dBuV, Test Circuit 1 IF IN = 80dBuV, Test Circuit 1 IF IN = 100dBuV, Test Circuit 1 5 - 6 pin Resistance, Test Circuit 3 350 550 750 1.5 1.7 1.85 1.8 2 2.1 12 15 18 KΩ - 60 - dB - 4 - V X = ( VRSSI3 - VRSSI2 ) / 35, D1 = 45 - ( VRSSI2 - VRSSI1 ) / X, D2 = 80 + ( VRSSI4 – VRSSI 3 ) / X, DRSSI = D2 - D1 Time taken for RSSI Output change from 10% to 90% after TRI signal turns on. Test Circuit 7 RSSI Response Time taken for RSSI Output change from 90% to 10% after TFI signal turns off. Test Circuit 7 The values shown in parenthesis are reference values. Ver.2010-06-24 mV to IF to IF usec - 4 - -3- NJM2549 TEST CIRCUIT This test circuit allows the measurement of all parameters described in “ELECTRICAL CHARACTERISTICS”. Test Circuit 1 (Detected Output: S-Curve) Audio Analyzer AF OUT Input impedance = 100kΩ LPF = 30kHz V + T1 R2 2.4k C6 82p C7 0.01u 10 RSSI OUT 9 C5 3p V C4 100p 8 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 Zo=50 IF IN Test Circuit 2 (Detected Output: N-Curve, the Detected Output is reversed) Audio Analyzer AF OUT Input impedance = 100kΩ LPF = 30kHz V + T1 C6 82p C7 0.01u 10 RSSI OUT R2 2.4k 9 8 C5 3p V C4 100p 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u R1 51 4 5 C3 0.01u T1:4CJH(Sample No.:080293006) Zo=50 SAGAMI ELEC CO., LTD. (Japan) IF IN Ver.2010-06-24 -4- NJM2549 Test Circuit 3 for Terminal Resistance 10 9 8 7 6 QUAD DET IF AMP 1 2 RSSI 3 4 5 Test Circuit 4 for IF Amplifier Oscilloscope A V T1 C7 0.01u C6 82p A 10 0.01uF + 15kΩ Selector R2 2.4k 9 8 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 Zo=50 IF IN T1:4CJH(Sample No.:080293006) SAGAMI ELEC CO., LTD. (Japan) Ver.2010-06-24 -5- NJM2549 Test Circuit 5 for Demodulated Signal Frequency Characteristics (Detected Output: S-Curve) AF OUT Spectrum Analyzer FET Probe V + T1 R2 2.4k C6 82p C7 0.01u 10 RSSI OUT 9 C5 3p V C4 100p 8 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 Zo=50 IF IN Test Circuit 6 for Demodulated Signal Frequency Characteristics (Detected Output: N-Curve) AF OUT Spectrum Analyzer FET Probe V + T1 C6 82p C7 0.01u 10 RSSI OUT R2 360 9 8 C5 3p V C4 100p 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 Zo=50 IF IN T1:4CJH(Sample No.:080293006) SAGAMI ELEC CO., LTD. (Japan) Ver.2010-06-24 -6- NJM2549 Test Circuit 7 for RSSI Response AF OUT V + Oscilloscope T1 R2 2.4k C6 82p C7 0.01u 10 9 C5 3p C4 100p 8 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 Zo=50 IF IN Signal ON to OFF OFF to ON Test Circuit 8 for Demodulated signal (LPF is connected) Ca 3300p Audio Analyzer Input impedance = 100kΩ LPF = 30kHz + fc= 2π Ra 68k 3 1 Hz RaRbRcCaCbCc Rb 68k Cb 330p Rc 68k AF OUT Cc 1000p V + RSSI OUT V T1 R2 2.4k C6 82p C7 0.01u 10 9 C5 3p C4 100p 8 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 Zo=50 IF IN T1:4CJH(Sample No.:080293006) SAGAMI ELEC CO., LTD. (Japan) Ver.2010-06-24 -7- NJM2549 TERMINAL FUNCTION (Ta = 25°C , V+ = 3V , No signal ) Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION 1 1 V+ -- Supply Voltage 5 1 1.95V 2pin: IF Amplifier Input 3,4pin: IF Decoupling An external decoupling capacitor is connected to enhance stability. The bandwidth of IF Amplifier can be adjusted. Large capacity: narrow IF Small capacity: wide IF -- Received Signal Strength Indicator Output Pin6 outputs DC level proportional to the log of pin2 input signal level. 1.25V FM IF Output This is a balanced output, and the capacitor for the phase-shifter is connected between QUAD IN and either of IF OUTs. The joining terminal changes the inclination. 7pin:N-Corve 8pin:S-Corve 2 2 3 4 IF IN IF DEC1 IF DEC2 3 10k 10k 4 50k 400uA 50k 5 1 70 6 RSSI 6 15k 5 1 70 7 8 7 IF OUT2 IF OUT1 70 8 300uA 300uA 5 Ver.2010-06-24 -8- NJM2549 Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION -- Quadrature Detector Input An external phase-shifting coil or discriminator is connected between IF OUT and pin9. Note that supply voltage should be the same as the voltage supplied to pin1. 1.05V Demodulated Signal Output Can output the wide range between ground level and supply voltage level. 1 9 70 QUAD IN 9 25uA 5 1 160uA 10 AF OUT 70 10 5 Ver.2010-06-24 -9- NJM2549 EVALUATION BOARD The evaluation board is useful for your design and to have more understanding of the usage and performance of this device. This circuit is the same as TEST CIRCUIT. Note that this board is not prepared to show the recommendation of pattern and parts layout. Circuit Diagram V AF OUT + RSSI OUT T1 R2 2.4k C6 82p C7 0.01u 10 9 C5 3p C4 100p 8 7 6 QUAD DET IF AMP 1 2 C1 0.01u C9 10u C8 0.01u RSSI 3 C2 0.01u 4 5 C3 0.01u R1 51 IF IN List of Component Items Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Ver.2010-06-24 Designation Value Items Designation Value C1 0.01uF Resistor R1 51Ω C2 0.01uF Resistor R2 2.4kΩ C3 0.01uF C4 100pF Transformer T1 4CJH C5 3pF C6 82pF IC IC1 NJM2549 C7 0.01uF C8 0.01uF C9 10uF Note: IF transformer for detection, 4CJH(Sample No.:080293006) SAGAMI ELEC CO., LTD. (Japan) - 10 - NJM2549 PRINTED CIRCUIT BOARD C3 C5 C4 R1 C2 C1 IC1 NJM 2549 R2 C6 C8 C7 Circuit Side View Ground Side View + C9 Ver.2010-06-24 - 11 - NJM2549 TYPICAL CHARACTERISTICS [DC CHARACTERISTICS] (Test Circuit 1, Ta = 25°C, V+ = 3V, No Signal, unless otherwise noted) Current Consumption versus Supply Voltage and Ambient Temperature Current Consumption versus Temperature and Supply Voltage 5 5 4 4 V+= 9.0V, 3.0V 3 25°C -40°C 2 Iccq ( mA ) Iccq ( mA ) Ta= 85°C 3 2.7V 2 1 1 0 0 0 2 4 6 8 -50 10 Supply Voltage V + ( V ) 0 50 100 Ambient Temperature Ta ( °C ) [IF AMP CHARACTERISTICS] (Test Circuit 4, Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 20dBuV, No Modulation, unless otherwise noted) IF AMP Gain versus IF Frequency and Terminal Capacitance IF AMP Gain versus IF Frequency ( Standard Circuit ) 100 100 Ta= -40°C, 25°C, 85°C C1=C2=C3 =1uF 80 60 GIF ( dB ) GIF ( dB ) 80 40 20 60 10nF 3.3nF 1nF 40 20 0 0 0.1 1 10 100 0.1 IF Input Frequency ( MHz ) 85 80 80 Ta= 85°C, 25°C -40°C GIF ( dB ) GIF ( dB ) 85 70 100 V+= 9.0V, 3.0V, 2.7V 75 70 65 65 2 4 6 8 Supply Voltage V + ( V ) Ver.2010-06-24 10 IF AMP Gain versus Temperature and Supply Voltage IF AMP Gain versus Supply Voltage and Ambient Temperature 75 1 IF Input Frequency ( MHz ) 10 -50 0 50 100 Ambient Temperature Ta ( °C ) - 12 - NJM2549 IF Output Level versus Temperature and Supply Voltage 550 550 500 500 450 Ta= 85°C 25°C -40°C 400 VO IF ( mVpp ) V O IF ( mVpp ) IF Output Level versus Supply Voltage and Ambient Temperature 350 450 V+= 2.7V, 3.0V, 9.0V 400 350 300 300 2 4 6 8 10 -50 Supply Voltage V+ ( V ) IF Output Duty Ratio versus Supply Voltage and Ambient Temperature 50 100 IF Output Duty Ratio versus Temperature and Supply Voltage 60 60 Ta= -40°C 55 50 V+= 9.0V, 3.0V, 2.7V 55 85°C 25°C DR IF ( % ) DR IF ( % ) 0 Ambient Temperature Ta ( °C ) 45 50 45 40 40 2 4 6 8 10 -50 Supply Voltage V + ( V ) 0 50 100 Ambient Temperature Ta ( °C ) IF Output Current versus Supply Voltage and Ambient Temperature IF Output Current versus Temperature and Supply Voltage 400 400 350 350 V+= 9.0V, 3.0V, 2.7V 300 25°C 250 IO IF ( uA ) IO IF ( uA ) Ta= -40°C 300 250 -40°C 200 200 2 4 6 Supply Voltage V + ( V ) Ver.2010-06-24 8 10 -50 0 50 100 Ambient Temperature Ta ( °C ) - 13 - NJM2549 [DEMODULATED CHARACTERISTICS (S- Curve)] (Test Circuit 1, Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 20dBuV, No Modulation, unless otherwise noted) Demodulated DC Level versus Frequency ( S-curve, BW:99MHz, Supply Voltage ) 5 10 4 8 3 6 2 VO DC ( V ) VO DC ( V ) Demodulated DC Level versus Frequency ( S-curve, BW:99MHz, Ambient Temperature ) Ta= -40°C 25°C 85°C 1 V+= 9.0V 3.0V 2.7V 4 2 Ta= 0 0 1 10 1 100 10 IF Input Frequency ( MHz ) Demodulated DC Level versus Frequency ( S-curve, BW:200kHz, Ambient Temperature ) Demodulated DC Level versus Frequency ( S-curve, BW:200kHz, Supply Voltage ) 5 5 4 V+=9.0V 3 VO DC ( V ) VO DC ( V ) 4 Ta= 85°C 25°C -40°C 3 2 3.0V 2.7V 2 1 1 0 0 10.6 10.65 10.7 10.75 10.6 10.8 Demodulated DC Level versus Supply Voltage ( S-curve, Ambient Temperature ) 10.7 10.75 10.8 Demodulated DC Level versus Temperature ( S-curve, Supply Voltage ) 2.0 2.0 1.5 25°C 1.0 -40°C V+= 9.0V 1.5 Ta= 85°C VO DC ( V ) VO DC ( V ) 10.65 IF Input Frequency ( MHz ) IF Input Frequency ( MHz ) 3.0V, 2.7V 1.0 0.5 0.5 0.0 0.0 2 4 6 8 + Supply Voltage V ( V ) Ver.2010-06-24 100 IF Input Frequency ( MHz ) 10 -50 0 50 100 Ambient Temperature Ta ( °C ) - 14 - NJM2549 [DEMODULATED CHARACTERISTICS (N- Curve)] (Test Circuit 2, Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 20dBuV, No Modulation, unless otherwise noted) Demodulated DC Level versus Frequency ( N-curve, BW:99MHz, Ambient Temperature ) Demodulated DC Level versus Frequency ( N-curve, BW:99MHz, Supply Voltage ) 5 10 4 6 VO DC ( V ) 3 VO DC ( V ) 8 Ta= -40°C 25°C 85°C 2 1 V+= 9.0V 3.0V 2.7V 4 2 0 0 1 10 100 1 10 IF Input Frequency ( MHz ) Demodulated DC Level versus Frequency ( N-curve, BW:200kHz, Ambient Temperature ) 5 4 4 Ta= 85°C, 25°C V+= 9.0V 3.0V 2.7V 3 VO DC ( V ) VO DC ( V ) Demodulated DC Level versus Frequency ( N-curve, BW:200kHz, Supply Voltage ) 5 3 2 -40°C 2 1 1 0 0 10.6 10.65 10.7 10.75 10.6 10.8 Demodulated DC Level versus Supply Voltage ( N-curve, Ambient Temperature ) 10.7 10.75 10.8 Demodulated DC Level versus Temperature ( N-curve, Supply Voltage ) 2.0 2.0 1.5 1.5 Ta= 85°C 25°C -40°C 1.0 0.5 V+= 9.0V VO DC ( V ) VO DC ( V ) 10.65 IF Input Frequency ( MHz ) IF Input Frequency ( MHz ) 1.0 3.0V, 2.7V 0.5 0.0 0.0 2 4 6 Supply Voltage V+ ( V ) Ver.2010-06-24 100 IF Input Frequency ( MHz ) 8 10 -50 0 50 100 Ambient Temperature Ta ( °C ) - 15 - NJM2549 [DEMODULATED CHARACTERISTICS (AC Level)] (Test Circuit 1, Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 80dBuV, fdev = ± 10kHz, fmod = 1kHz, unless otherwise noted) S+N, N, AMR, SINAD versus IF Input Level (Test Circuit 1) S+N, N , AMR , SINAD versus IF Input Level (Test Circuit 8) -10 50 SINAD -30 40 AMR -40 30 N -50 20 -60 -70 0 20 40 60 80 SINAD 50 -30 40 AMR -40 10 -60 0 -70 20 10 N 0 0 100 20 40 60 80 100 IF Input Level ( dBuV ) Detuning Characteristic ( VOAC , THD, N-Curve ) 4 1000 3 S-Curve 2 1 1 S-Curve ( V ) 100 VOAC ( mVrms ) , THD ( % ) Circuit 1 VOAC VOAC ( mVrms ) , THD ( % ) 30 -50 Detuning Characteristic ( VOAC , THD, S-Curve ) 10 60 -20 IF Input Level ( dBuV ) 1000 70 SINAD ( dB ) 60 S+N Circuit 2 4 VOAC 100 10 3 N-Curve 1 2 N-Curve ( V ) -20 0 S+N, N, AMR ( dB ) S+N, N, AMR ( dB ) -10 70 SINAD ( dB ) S+N 0 1 THD THD 0.1 0 10.55 10.6 10.65 10.7 10.75 10.8 10.85 IF Input Frequency ( MHz ) 0.1 0 10.55 10.6 10.65 10.7 10.75 10.8 10.85 IF Input Frequency ( MHz ) Demodulated Signal Level versus FM Modulation Frequency 175 Circuit 6 fdev= ±100kHz 150 VO AC ( mVrms ) 125 100 75 50 25 Circuit 5 fdev= ±10kHz 0 1 10 100 1000 10000 FM Modulation Frequency fmod ( kHz ) Ver.2010-06-24 - 16 - NJM2549 Demodulated Signal Level versus Supply Voltage and Ambient Temperature Demodulated Signal Level versus Temperature and Supply Voltage 200 200 180 180 VO AC ( mVrms ) 160 140 V+= 9.0V 160 V O AC ( mVrms ) Ta= 85°C 25°C -40°C 3.0V, 2.7V 140 120 120 100 100 2 4 6 8 10 -50 Supply Voltage V+ ( V ) AF Output pin Bias Current versus Supply Voltage and Ambient Temperature 50 100 AF Output pin Bias Current versus Temperature and Supply Voltage 350 350 300 250 V+= 9.0V 300 Ta= 85°C IO AF ( uA ) IO AF ( uA ) 0 Ambient Temperature Ta ( °C ) 25°C 200 250 3.0V 2.7V 200 -40°C 150 150 100 100 2 4 6 8 10 Supply Voltage V+ ( V ) -50 0 50 100 Ambient Temperature Ta ( °C ) Demodulated DC Level versus Frequency and R2 3 R2= 4.7k 2.4k 1.2k V O DC ( V ) 2 680 360 180 1 0 10.6 10.65 10.7 10.75 10.8 IF Input Frequency ( MHz ) Ver.2010-06-24 - 17 - NJM2549 [RSSI CHARACTERISTICS] (Test Circuit 1, Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 80dBuV, fdev = ± 10kHz, fmod = 1kHz, unless otherwise noted) RSSI Output versus IF Input Level and Ambient Temperature 2.5 RSSI Output versus IF Input Level and Supply Voltage 2.5 Ta= 85°C 25°C -40°C 2.0 V+= 9.0V 2.0 3.0V, 2.7V 1.5 VRSSI ( V ) V RSSI ( V ) 1.5 1.0 0.5 1.0 0.5 0.0 0.0 0 20 40 60 80 100 0 IF Input Level ( dBuV ) 20 40 60 80 100 IF Input Level ( dBuV ) RSSI Output versus Temperature and IF Input Level RSSI Output versus Supply Voltage and IF Input Level 2.5 2.5 IF IN= 100dBuV IF IN= 100dBuV 2.0 2.0 80dBuV 80dBuV 1.5 1.0 45dBuV V RSSI ( V ) V RSSI ( V ) 1.5 1.0 45dBuV 0.5 0.5 No input signal 0.0 2 4 6 8 10 Supply Voltage V + ( V ) No input signal 0.0 -50 0 50 100 Ambient Temperature Ta ( °C ) RSSI Output versus Supply Voltage Frequency and IF Input Level 2.5 IF IN= 100dBuV VRSSI ( V ) 2.0 80dBuV 1.5 1.0 45dBuV 0.5 No input signal 0.0 0.1 1 10 100 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. IF Input Frequency ( MHz ) Ver.2010-06-24 - 18 -