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Ordering number : ENN6310A
Monolithic Linear IC
LA1650, 1650C
Time Code Reception ICs
Overview
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.
Package Dimensions
unit: mm 3007A-DIP18
[LA1650]
18 10
Features
* * * * Low-voltage operation (VCC op = 1.2 V and higher) Low current drain (500 A for @ 10 dB V input) Standby mode current: Less than 1 A High sensitivity (Reception is possible at Vin = 10 dB V.) * Packages: DIP18 (LA1650) Chip (LA1650C)
1
24.2
7.62 6.4
9
1.94 2.54
0.5
1.2
Functions
* RF amplifier, rectifier, detector, time code output, standby circuit
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta 75C Conditions Ratings 7.5 100 -20 to +75 -40 to +125 Unit V mW C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCCOP Conditions Ratings 1.5 1.2 to 6.5 Unit V 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
3.3
3.85max
3.25
SANYO: DIP18
0.25
LA1650, 1650C Operating Characteristics at Ta = 25C, 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 [Overall Characteristics] Current drain Operating current Standby current [Amplifier Input Characteristics] Input impedance Input frequency range Minimum input voltage Maximum input voltage ZI FIN VIN min VIN max VO1 VO2 VO3 VO4 VOH VOL T500 T800 T200 Pin 1 (pad 1) input Pin 1 (pad 1) input 1pin (PAD1) 37.5 1 100 450 80.0 k kHz Vrms mVrms ICCO ICC ISTB No input fIN = 40 kHz, VIN = 10 dBV With the pin 5 (pad 5) voltage at 0 V 400 370 540 510 0.1 680 650 1.0 A A A Symbol Conditions Ratings min typ max Unit
[Amplifier Output Characteristics] With pin 1 (pad 1) as the input pin, fIN = 40 kHz Output voltage (1) Output voltage (2) Output voltage (3) Output voltage (4) No input, the pin 11 output VIN = 10 dBV, the pin 11 output VIN = 20 dBV, the pin 11 output VIN = 80 dBV, the pin 11 output No input VIN = 10 dBV VIN = 0 to 100 dBV, AM modulation (1 Hz square wave, duty = 50%, 100% modulation) VIN = 0 to 100 dBV, AM modulation (1 Hz square wave, duty = 80%, 100% modulation) VIN = 0 to 100 dBV, AM modulation (1 Hz square wave, duty = 20%, 100% modulation) 480 750 180 10 15 25 35 20 28 40 48 34 48 62 88 mVrms mVrms mVrms mVrms
[TCO Output Characteristics] With pin 1 (pad 1) as the input pin, fIN = 40 kHz Output voltage (high) Output voltage (low) Output pulse width (500 ms input) Output pulse width (800 ms input) Output pulse width (200 ms input) 1.40 1.45 0.05 500 800 200 0.10 650 970 400 V V ms ms ms
No. 6310-2/14
LA1650, 1650C Chip Specifications (LA1650C)
Chip size Chip thickness Pad size Pad opening 1.41 x 2.06 330 (20) 140 x 140 115 x 115 mm2 m m2 m2
Pad Coordinates (LA1650C)
PAD P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 Pad Amplifier (1) input AGC VCC Standby mode Amplifier (1) output Symbol INPUT AGC2 AGC1 VCC PON AMP1_OUT1 AMP1_OUT2 AMP2_IN1 AMP2_IN2 AMP2_OUT2 AMP2_OUT1 REC_IN1 REC_IN2 REC_OUT1 DEC_IN1 TCO GND REG X-axis 585 385 154 158 154 154 164 397 597 864 1086 1264 1264 1264 1264 1264 1113 849 Y-axis 1914 1914 1734 1410 1221 711 201 154 154 154 154 361 531 701 1455 1625 1914 1914
Amplifier (2) input
Amplifier (2) output
REC input REC output DEC input DEC output GND REG
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
Pattern 1A1650
1A1650
3
16
4
NC
15
5
NC
14
6
13
7
12
8
9
10
11
A12842
No. 6310-4/14
TCO + + 10F 1000pF 1000pF 10
Block Diagram and Test Circuit
18
0.015F
22F
17
16
15
14
13
12
11
REG
DEC
REC
AMP(2) AMP(1)
LA1650, 1650C
1
2
3
4
5
6
7 1M
8
9
Input + + 1M 22F 100F + Standby
10F 51
Power ON
VCC
40 kHz crystal
A12758
No. 6310-5/14
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 k. 1 Amplifier (1) input 1.5 Connect the antenna coil between pins 1 and 4. Recommended coil: ACL-80 (Sumida Electronics)
1
A12759
2 3
AGC (1) input AGC (2) input
0.6 0.6
The AGC operating speed is determined by the capacitor connected between pin 3 and ground.
3 2
17
4 VCC 1.5
A12760
4
This LA1650 operates normally with pin 5 at VCC. The device goes to standby mode (ICC 1 A) when this pin is pulled to ground.
5 18
5
PON
1.5
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) 40 kHz, 12.5 pF
6
7
17
A12762
RIN
8 9
RIN 9
8
Amplifier (2) input 0.8 RIN = 20 k
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
Emitter-follower output
10 11
17
A12764
RIN
12 13 Full-wave rectifier circuit input REC input 0.8 RIN = 20 k
RIN
12
13
A12765
4
Full-wave rectifier circuit output ROUT = 75 k 14 REC output 0.8 High-frequency components are smoothed by the capacitor connected between pin 14 and ground.
ROUT 14
17
A12766
15
DEC input
0.7
Wave shaping circuit input
15
17 4
Wave shaping circuit output 16 DEC output -- ROUT = 100 k This pin outputs the time code. (Inverted output)
A12767
ROUT 16
17
17 GND 0
A12768
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 k, 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)
Low-pass filter (time constant: several seconds or longer)
To the DEC block
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 A, 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 H (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
, Z -- f
180 20
Impedance, Z
0 10
Phase,
-180 35 40 0 45
Frequency, f -- kHz
Impedance, Z -- k
Phase, -- deg.
No. 6310-9/14
LA1650, 1650C Antenna Dimensions (trigonometric)
18.0
3.5
60.0
9.0
5.0 0.7
7.5
65.0 80.0
7.5
o10.0
A12843
No. 6310-10/14
Display
Sample Application Circuit
PON Microcontroller
TCO 10F 22F 1000pF +
0.015F
+
LA1650, 1650C
18
17
16
15
14
13
12
11
10
LA1650
2 3 4 5 6 7 1M 8 9
1
+
10F 100F +
22F
1M
Bar ANT +
40 kHz crystal
VCC
A12774
1000pF
No. 6310-11/14
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 output SG 18 17 16 15
LA1650
1 2 3 4
+
51
+
+
A12775
Figure 1 Direct Signal Generator Input to the IC
TCO + SG 18 17 16 15
LA1650
Loop antenna 1 2 3 4
Bar 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) min 480 typ 500 max 650 unit ms
TCO rise (reference) 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) min 750 typ 800 max 970 unit ms
TCO rise (reference) 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 480 typ 500 max 650 unit 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

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