Ordering number : ENN6310A Monolithic Linear IC LA1650, 1650C Time Code Reception ICs Overview Package Dimensions The LA1650 and LA1650C receive long-wave time standard broadcasts (JG2AS in Japan and DCF77 in Germany) and detect and output the time code multiplexed on the long-wave time standard broadcast signal. Clocks can automatically correct their time using the time code information received by the LA1650 and LA1650C. unit: mm 3007A-DIP18 [LA1650] 18 7.62 6.4 10 1 9 3.25 24.2 3.85max Low-voltage operation (VCC op = 1.2 V and higher) Low current drain (500 µA for @ 10 dBµ V input) Standby mode current: Less than 1 µA High sensitivity (Reception is possible at Vin = 10 dBµ V.) • Packages: DIP18 (LA1650) Chip (LA1650C) 3.3 • • • • 0.25 Features 1.94 2.54 0.5 1.2 SANYO: DIP18 Functions • RF amplifier, rectifier, detector, time code output, standby circuit Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings VCC max Allowable power dissipation Pd max Ta ≤ 75°C Unit 7.5 V 100 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –40 to +125 °C Ratings Unit Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Operating supply voltage range VCCOP Conditions 1.5 V 1.2 to 6.5 V Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 30300RM (OT) No. 6310-1/14 LA1650, 1650C Operating Characteristics at Ta = 25°C, VCC = 1.5 V, with the pin 5 used as VCC, in the specified test circuit, unless otherwise specified. Values in parentheses refer to the LA1650C. (Using the Yamaichi Electronics IC37N1803 socket.) Parameter Symbol Conditions Ratings min typ max Unit [Overall Characteristics] Current drain Operating current Standby current ICCO ICC ISTB No input 400 540 680 µA fIN = 40 kHz, VIN = 10 dBµV 370 510 650 µA 0.1 1.0 µA 80.0 kHz With the pin 5 (pad 5) voltage at 0 V [Amplifier Input Characteristics] Input impedance Input frequency range ZI 1pin (PAD1) FIN 450 37.5 kΩ Minimum input voltage VIN min Pin 1 (pad 1) input 1 µVrms Maximum input voltage VIN max Pin 1 (pad 1) input 100 mVrms [Amplifier Output Characteristics] With pin 1 (pad 1) as the input pin, fIN = 40 kHz Output voltage (1) VO1 No input, the pin 11 output 10 20 34 mVrms Output voltage (2) VO2 VIN = 10 dBµV, the pin 11 output 15 28 48 mVrms Output voltage (3) VO3 VIN = 20 dBµV, the pin 11 output 25 40 62 mVrms Output voltage (4) VO4 VIN = 80 dBµV, the pin 11 output 35 48 88 mVrms [TCO Output Characteristics] With pin 1 (pad 1) as the input pin, fIN = 40 kHz Output voltage (high) VOH No input Output voltage (low) VOL VIN = 10 dBµV Output pulse width (500 ms input) T500 VIN = 0 to 100 dBµV, AM modulation (1 Hz square wave, duty = 50%, 100% modulation) Output pulse width (800 ms input) T800 Output pulse width (200 ms input) T200 1.40 1.45 V 0.05 0.10 V 480 500 650 ms VIN = 0 to 100 dBµV, AM modulation (1 Hz square wave, duty = 80%, 100% modulation) 750 800 970 ms VIN = 0 to 100 dBµV, AM modulation (1 Hz square wave, duty = 20%, 100% modulation) 180 200 400 ms No. 6310-2/14 LA1650, 1650C Chip Specifications (LA1650C) 1.41 × 2.06 Chip size mm2 Chip thickness 330 (±20) µm Pad size 140 × 140 µm2 Pad opening 115 × 115 µm2 Pad Coordinates (LA1650C) PAD Pad Symbol X-axis P1 Amplifier (1) input INPUT 585 1914 AGC2 385 1914 P2 P3 AGC P4 VCC P5 Standby mode P6 P7 P8 P9 P10 P11 P12 P13 Amplifier (1) output Amplifier (2) input Amplifier (2) output REC input Y-axis AGC1 154 1734 VCC 158 1410 1221 PON 154 AMP1_OUT1 154 711 AMP1_OUT2 164 201 AMP2_IN1 397 154 AMP2_IN2 597 154 AMP2_OUT2 864 154 AMP2_OUT1 1086 154 REC_IN1 1264 361 531 REC_IN2 1264 P14 REC output REC_OUT1 1264 701 P15 DEC input DEC_IN1 1264 1455 P16 DEC output TCO 1264 1625 P17 GND GND 1113 1914 P18 REG REG 849 1914 Note: The origin (0, 0) is taken to be the left lower corner in the metal pattern figure on the next page. The pad coordinates are the values of the coordinates of the center of the pad. No. 6310-3/14 LA1650, 1650C Metal Pattern Figure Chip size X : 1.41 Y : 2.06 2 1 18 17 1A1650 Pattern 1A1650 3 16 4 15 NC 5 14 NC 6 13 7 12 8 9 10 11 A12842 No. 6310-4/14 VCC Input 1 51Ω 0.015µF 2 AMP(1) REG 17 + 10µF + 3 16 DEC 4 22µF + Power ON 15 + 22µF 5 14 10µF Standby + 6 REC 13 1MΩ 18 TCO 7 12 1000pF 40 kHz crystal 8 AMP(2) 11 9 10 1000pF A12758 LA1650, 1650C Block Diagram and Test Circuit No. 6310-5/14 1MΩ 100µF LA1650, 1650C Pin Functions (VCC = 1.5 V) Pin No. Function No-signal voltage (V) Notes Equivalent circuit 4 The input impedance, Zi, is 450 kΩ. 1 Amplifier (1) input 1.5 Connect the antenna coil between pins 1 and 4. 1 Recommended coil: ACL-80 (Sumida Electronics) A12759 2 AGC (1) input 0.6 3 AGC (2) input 0.6 3 The AGC operating speed is determined by the capacitor connected between pin 3 and ground. 2 17 4 VCC A12760 1.5 4 5 PON 1.5 5 This LA1650 operates normally with pin 5 at VCC. The device goes to standby mode (ICC ≤ 1 µA) when this pin is pulled to ground. 18 17 A12761 Connect the crystal oscillator elements between pins 6 and 8, and pins 7 and 9. 6 7 Amplifier (1) output 0.7 Recommended element: VTC200 (Seiko Instruments) 6 7 40 kHz, 12.5 pF 17 RIN 8 9 8 Amplifier (2) input 0.8 A12762 RIN 9 RIN = 20 kΩ 17 A12763 Continued on next page. No. 6310-6/14 LA1650, 1650C Continued from preceding page. Pin No. Function No-signal voltage (V) Notes Equivalent circuit 4 10 11 Amplifier (2) output 0.7 10 Emitter-follower output 11 17 A12764 RIN 12 13 Full-wave rectifier circuit input REC input 0.8 RIN 12 RIN = 20 kΩ 13 A12765 4 Full-wave rectifier circuit output ROUT ROUT = 75 kΩ 14 REC output 0.8 14 High-frequency components are smoothed by the capacitor connected between pin 14 and ground. 17 15 DEC input 0.7 A12766 15 Wave shaping circuit input A12767 17 4 ROUT Wave shaping circuit output 16 DEC output — ROUT = 100 kΩ 16 This pin outputs the time code. (Inverted output) 17 17 GND A12768 0 4 5 18 18 REG 0.8 Vreg = VCC – 0.7 V 17 A12769 No. 6310-7/14 LA1650, 1650C Block Functional Descriptions Amplifier Block The radio signal picked up by the bar antenna (resonant frequency: 40 kHz for Japan) is amplified by amplifier 1 which includes an AGC function, and is passed through a 40 kHz crystal element used as a bandpass filter. This signal is then amplified further by amplifier 2. The total gain from the amplifier 1 input to the amplifier 2 output is 90 dB when the AGC is disabled. AMP(1) witn AGC Crystal AMP(2) A12770 Since amplifier 1 has frequency characteristics of –3 dB at fc = 80 kHz from the output level at fc = 40 kHz, and amplifier 2 has frequency characteristics that are flat up to 100 kHz, this IC can support the standard radio frequencies used in any country simply by changing bar antenna and the resonant frequency of the crystal used. REC Block The 40 kHz carrier signal output from amplifier 2 is input to the REC block through a 1000 pF capacitor. The REC block input impedance is 20 kΩ, which, in conjunction with the 1000 pF capacitor, forms a high-pass filter with a cutoff frequency of about 8 kHz. The carrier is full-wave rectified within the REC block, split into two signal systems, and output. One signal system passes through a low-pass filter with a time constant of about 1 s and is then input to the DEC block. The other passes through a low-pass filter with an even larger time constant and is fed back to amplifier 1 as the AGC control voltage (pin 3: a DC voltage). Rectifier Low-pass filter (time constant: 1 s) To the DEC block Low-pass filter (time constant: several seconds or longer) AGC voltage (to amplifier 1) A12771 The AGC voltage is set up to be about 0.6 V when there is no input present. However, since charging is performed by a small current of only a few µA, we recommend precharging if the LA1650 is used for reception immediately after power is applied. (Charge to about 1.0 V for about 100 ms.) DEC Block The time code signal (1 Hz) from which the 40 kHz carrier has been removed is input to the DEC block, and wave shaping is applied to create a serial output signal in which 1 and 0 have the levels VCC and ground, respectively. VCC Decoder GND A12772 No. 6310-8/14 LA1650, 1650C Antenna (prototype) Specifications Model number: Prototype number: Inductance: Tuning frequency: Mounting capacitance: Winding: Number of windings: ACL-80 (Sumida Electronics) 74M-656 588 µH (reference value at 10 kHz) 40 kHz 27000 pF UEW 0.35 94 turns (4-3) * Consult with your Sanyo representative before starting mass production. Pin Connections (back surface) 1 3 2 4 S A12773 θ, Z — f 20 Impedance, Z 0 10 Impedance, Z — kΩ Phase,θ — deg. 180 Phase, θ –180 35 40 0 45 Frequency, f — kHz No. 6310-9/14 LA1650, 1650C 9.0 18.0 Antenna Dimensions (trigonometric) 3.5 60.0 5.0 ø10.0 0.7 7.5 65.0 7.5 80.0 A12843 No. 6310-10/14 VCC Bar ANT 17 2 1 0.015µF 18 10µF + + 3 16 TCO Microcontroller 100µF 4 15 PON + 14 + 10µF 22µF 5 LA1650 22µF + Display 6 13 1MΩ 40 kHz crystal 7 12 10 9 8 1000pF 11 A12774 LA1650, 1650C Sample Application Circuit No. 6310-11/14 1000pF 1MΩ LA1650, 1650C LA1650 Evaluation Procedure Two relatively simple techniques for measuring the sensitivity index are (1) to input the signal generator output directly to the IC (see figure 1), and (2) to use an antenna as shown in figure 2. + TCO 50 Ω output SG 18 17 16 15 3 4 2 + 1 + LA1650 + 51 Ω A12775 Figure 1 Direct Signal Generator Input to the IC + TCO SG 18 17 16 15 3 4 LA1650 Bar antenna 2 + 1 + Loop antenna + A12776 Figure 2 Antenna to Antenna Signal Input No. 6310-12/14 LA1650, 1650C The following three techniques are practical test procedures. Note that since the output from the LA1650 pin 16 is inverted from the value of the time code, an inverter must be inserted between the output and the microcontroller. • Continuously output a signal with the value 1 (fc = 40 kHz, AM modulation (90%), fm = 1 Hz (square wave, duty = 50%)) and read out the value 1 from the LA1650. Then, lower the signal generator level until the LA1650 can no longer correctly output the 1 level. The minimum signal generator level at which correct reception occurs is the sensitivity. When monitoring the LA1650 output signal with a microcontroller, monitor the output pulse width for the range listed in table 1. The output signal should be observed to be a 1 Hz signal, with a period of 1000 ±25 ms. (See figure 3.) Table 1 Signal Value 1 Range Item Output pulse width (500 ms input) TCO rise (reference) min typ max unit 480 500 650 ms 1000 ±25 ms 480 to 650 ms A12777 Figure 3 Time Code Value 1 Signal Output • Continuously output a signal with the value 0 (fc = 40 kHz, AM modulation (90%), fm = 1 Hz (square wave, duty = 80%)) and read out the value 0 from the LA1650. Then, lower the signal generator level until the LA1650 can no longer correctly output the 0 level. The minimum signal generator level at which correct reception occurs is the sensitivity. When monitoring the LA1650 output signal with a microcontroller, monitor the output pulse width for the range listed in table 2. The output signal should be observed to be a 1 Hz signal, with a period of 1000 ±25 ms. (See figure 4.) Table 2 Signal Value 0 Range Item Output pulse width (800 ms input) TCO rise (reference) min typ max unit 750 800 970 ms 1000 ±25 ms 750 to 970 ms A12778 Figure 4 Time Code Value 0 Signal Output • Create a simulated time standard radio signal (fc = 40 kHz, AM modulation (90%), fm = 1 Hz time code (this signal you will have to create yourself)) and verify that the time is modified correctly. The sensitivity is then the minimum level for which the time is modified correctly. When monitoring the LA1650 output signal with a microcontroller, monitor the output pulse width for the ranges listed in table 3. The output signal should be observed to be a 1 Hz signal, with a period of 1000 ±25 ms. (See figure 4.) Table 3 Time Code Signal Output Ranges Item Output pulse width (500 ms input) Output pulse width (800 ms input) Output pulse width (200 ms input) min typ max unit 480 500 650 ms 750 800 970 ms 180 200 400 ms No. 6310-13/14 LA1650, 1650C Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer’s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer’s products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification” for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. 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 March, 2000. Specifications and information herein are subject to change without notice. PS No. 6310-14/14