la1867nm Sanyo Semiconductor Corporation, la1867nm Datasheet
la1867nm
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la1867nm Summary of contents
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... Symbol Conditions V max Pins 4 and 31 CC Pdmax Topr Tstg Symbol Conditions V Pins 4 and Pins 29 and 44 CC ST/ Monolithic linear IC LA1867NM [LA1867NM] SANYO: QIP44MA Rating Unit 9.2 V 740 mV –40 to +85 °C –40 to +150 °C Rating Unit 8.0 V 5.0 V 7.0 to 9.0 V 32096HA (OT)/D2593TS (OT) No. 4619-1/32 ...
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... Vi-Mute SD sensitivity SD IF counter buffer output V IFBUFF-FM AM output V O-AM Note: * Unless otherwise specified, with an IHF-BPF/T200 inserted in the pin 7 and 8 MPX output circuit. LA1867NM = 8.5 V (Note that these measurements are made using CC Conditions No input ( 10.7 MHz, 100 dBµ, 1 kHz, 100% mod, pin 7 output 10.7 MHz,100 dBµ ...
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... Noise AGC • Pilot signal compensation circuit • Noise reduction setting pin • Noise canceller off in AM mode function • High-pass filter “fc” control pin LA1867NM Conditions No input, pin 32 DC output, non-mod, SW-2 open 50 dBµ, pin 32 DC output, non-mod, SW-2 open 70 dBµ ...
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... A new noise canceller system was developed. — Reduced noise canceller errors during overmodulated signal reception. — Reduced noise canceller errors under continuous noise conditions. • Miniaturization of the required external capacitors LA1867NM Application design is eased since these can all be set independently. No. 4619-4/32 ...
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... Built-in anti-birdie filters (114 kHz and 190 kHz) — Improved high region separation characteristics — Improved stereo signal-to-noise ratio 4. MRC • Controls the SNC and HCC circuit control signals by detecting the field strength (S-meter) and multipath noise. LA1867NM No. 4619-5/32 ...
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... Test Circuit LA1867NM No. 4619-6/32 ...
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... Block Diagram and Peripheral Circuits LA1867NM No. 4619-7/32 ...
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... Noise canceller input 21 FM detector output Adj LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Note Constant current drive type The slope can be changed by changing the value of the S-meter output resistance. The field strength can be shifted in the positive or negative direction with an external resistor on pin 28 without changing the S-meter slope ...
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... BYPASS 23 Mute drive output 22 Mute input 33 FM mute ON Adj LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Note Limited amplifier input Select the capacitor grounding point carefully. The muting time constants from the external CR circuit are determined as follows. ...
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... QD OUT REF 29 SD pin SD sensitivity adjustment 30 pin IF counter buffer 19 Seek/stop switch LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Note • the resistor that determines the band 1 muting bandwidth. Increasing R reduces the bandwidth. 1 Decreasing R increases the bandwidth. 1 • Null voltage When tuned, the voltage between pins 24 and 27 will ...
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... MPX Block Pin Function 5 Pilot detector 14 H control input pin CC 13 SNC control input pin LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Note The IC is forced to mono MΩ resistor is inserted between pin 5 and off in AM mode Controls the sub output with an input of between 0 and 1 V ...
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... Pin Function 10 PHASE COMP Separator adjustment pin 6 VCO LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Note The sub decoder input level is adjusted with a trimmer. (The output level in mono and main modes does not change.) The oscillator frequency is 912 kHz. ...
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... Continued from preceding page. Pin Function Pilot cancellation signal 3 output 17 GND 7 MPX out (left) 8 MPX out (right) LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Note Pin 3 is the pilot cancellation signal output. GND No. 4619-13/32 ...
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... Pilot input 1 HCC capacitor NC Block Pin Function Pilot cancellation signal 2 input LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Equivalent internal circuit Note Pin 43 is the PLL circuit signal input. The HCC frequency characteristics are determined by the capacitor connected at this pin. ...
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... Memory circuit pins 43 NC Block Applications Pin Function 20 Noise killer input LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Equivalent internal circuit Note This time constant sets the gate time to 40 µs. The noise rejection ratio increases with the gate time. However, caution is required since multipath and the distortion sensitivity for overmodulated signals are degraded ...
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... HPF slope adjustment pin MRC Block Pin Function IF S-meter output and MRC 18 DC input pin LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Equivalent internal circuit Note Pin 38 is the noise sensitivity setting pin. First set the medium field (about 50 dBµ) level, and the set the weak field (about dBµ ...
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... MRC control voltage time 34 constant MRC control voltage time 34 constant Time constant setting pin 16 constant LA1867NM Unit (resistance:Ω, capacitance:F) Equivalent internal circuit Equivalent internal circuit Note Note In methods in which the S-meter AC components are detected directly, the noise and the amplifier gain is determined kΩ ...
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... A high level must be applied to pin 29 through a 100 kΩ resistance. 29 The following condition is required for IF buffer operation. • high level must be applied to pin 19 through a 51 kΩ resistance. 19 LA1867NM ) CC . When the operated, the IC automatically switches to FM mode. (Note Pin V Mode ...
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... LA1867NM has a noise convergence design target of from dB.) 5. Muting time constant The LA1867NM allows the volume level to be changed gradually for field variations during weak field reception by setting the attack and recovery times for the soft mute function. ...
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... Also, the decoder high-band separation in the sub signal frequency band ( kHz) will not degraded if the external capacitor C’s value is made sufficiently smaller than the variable resistor’s impedance. LA1867NM No. 4619-20/32 ...
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... S-meter AC component is detected directly. Figure 3 shows the technique in which the NC HPF noise is detected, and Figure 4 shows the technique in which multipath is detected using the S-meter high area components. Figure 3 Application Circuit Using NC HPF Noise Detection LA1867NM Figure 2 Multipath Circuit No. 4619-21/32 ...
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... In the technique of Figure 4, in which multipath is detected using the S-meter high area components, and In the technique of Figure 3, in which the NC HPF noise is detected, the noise amplifier gain is determined by R internal 30 kΩ resistance as shown in Figure 6. The frequency characteristics of the circuit are determined by the capacitor LA1867NM Figure 5 Figure 6 and the 2 No. 4619-22/32 ...
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... The time constants with which the MRC controls the separation are determined by the internal 1 kΩ resistance and C on discharge, and the 7 µA fixed current and C 2 Figure 7 Coil Specifications • Toko Electric Corporation Coils 7KLS M402AES-1298 • Sumida Electric Coils QU-7L SA-208 • Ceramic Oscillators • Murata Mfg. Co., Ltd. CSB912JF104 LA1867NM on charge. 2 Figure 8 6-4 4T 6-3 22 1/4T 3-1 65T ...
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... LA1867NM No. 4619-24/32 ...
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... LA1867NM No. 4619-25/32 ...
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... LA1867NM No. 4619-26/32 ...
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... LA1867NM No. 4619-27/32 ...
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... LA1867NM No. 4619-28/32 ...
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... LA1867NM No. 4619-29/32 ...
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... LA1867NM No. 4619-30/32 ...
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... LA1867NM No. 4619-31/32 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of February, 1997. Specifications and information herein are subject to change without notice. LA1867NM No. 4619-32/32 ...