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| ML12502 Analog Mixer With On-Chip Regulator For Bias Control Legacy Device: Motorola 12502 The ML12502 is the military temperature version of the commercial ML12002 device. It is a double balanced analog mixer, including an input amplifier feeding the mixer carrier port and a temperature compensated bias regulator. The input circuits for both the amplifier and mixer are differential amplifier circuits. The on-chip regulator provides all of the required biasing. This circuit is designed for use as a balanced mixer in high-frequency wide-band circuits. Other typical applications include suppressed carrier and amplitude modulation, synchronous AM detection, FM detection, phase detection, and frequency doubling, at frequencies up to UHF. There are two package offerings: * Dual Inline 14 Lead, Ceramic Package. * Operating Temperature Range: TA = -55 to +125C Regulator Bypass Local Oscillator Input Local Oscillator Input Output Alternate Signal Input Null Adjust 1 14 VCC 14 1 CERDIP 14 = C CERAMIC PACKAGE CASE 632 CROSS REFERENCE/ORDERING INFORMATION PACKAGE MOTOROLA LANSDALE CERDIP 14 12502/BCA ML12502/BCA PIN CONNECTIONS 2 13 Resistor Load Figure 1. Logic Diagram 2 3 VB 8 Signal Inputs 9 Amplifier VR Carrier Port Mixer Signal Port VR VB 12 11 3 12 Data Output Local Oscillator Inputs 4 11 Data Output 5 10 Regulator Bypass Mixer Signal Input Mixer Signal Input Null Adjust 6 9 VEE Bias Regulator 7 (Top View) 8 Page 1 of 8 www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. Page 2 of 8 ELECTRICAL CHARACTERISTICS www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. Page 3 of 8 ELECTRICAL CHARACTERISTICS www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. Page 4 of 8 www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. Figure 4. Carrier Feedthrough Test Circuits Signal A Input (Pin 2) Output (Pin12) Output (Pin 11) Signal B Input (Pin 8) Output (Pin 12) Output (Pin 11) Tektronix 454 and 568 Oscilloscopes 1.0 f 2 3 Local Oscillator Inputs Mixer Inputs Reg. Bypass 1 0.1 f 0.1 f 10 Null Adjust 5 50 6 Outputs 12 Sampling Volt meter Hewlett Packard 3406A or Equiv. 1.0 f Hewlett Packard 651A and 3300B 100 kHz to 100 MHz @ 30 mVpp 8 1.0 f 9 11 133 VCC 14 133 VEE 7 0.1 f +5.0 V Notes: Test 1 - Adjust potentiometer for carrier null at fc = 100 kHz. Test 2 - Connect pins 5 and 6 to Gnd. All Input and output cables to the scope are equal lengths of 50-ohm coaxial cable. Page 5 of 8 www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. Figure 5. Carrier Feedthrough versus Frequency (Test 1) V CFT, CARRIER OUTPUT VOLTAGE (mV[rms]) 5.0 4.0 V CFT, CARRIER OUTPUT VOLTAGE (mV [rms]) 1.0 10.0 100.0 Figure 6. Carrier Feedthrough versus Frequency (Test 2) 5.0 4.0 3.0 3.0 2.0 2.0 1.0 0.0 0.1 1.0 0.0 0.1 1.0 10.0 100.0 fc, CARRIER FREQUENCY (MHz) fc, CARRIER FREQUENCY (MHz) Figure 7. Carrier Suppression Test Circuit Hewlett Packard 3406A Sampling Voltmeter 0.1 f Hewlett Packard TEE 11536A 50 1.0 f 2 3 8 Local Oscillator Inputs Mixer Inputs Reg. Bypass VEE 1 1.0 f 10 1.0 f 50 - + - 5.0 V 7 5 Outputs 12 11 50 50 Null Adjust 6 VCC 14 50 X 50 Atten. 50 0.1 f Hewlett Packard 651A and 3300B 100 kHz to 400 MHz @ 30 mV RMS. Hewlett Packard 651A 10 kHz @ 150 mV R.M.S. 1.0f 9 All input and output cables to the scope are equal lengths of 50-ohm coaxial cable. - 5.0 V Notes: Test 1 - Adjust potentiometer for carrier null @ fc = 100 kHz Test 2 - Connect pins 5 and 6 to -5.0 volts Test 3 - Adjust potentiometer for carrier null @ 25 C Figure 8. Carrier Suppression versus Frequency (Test 1) +40 +30 +20 +10 0 -10 -20 -30 -40 -50 -60 0.1 1.0 10.0 100.0 1.0 K CARRIER SUPPRESSION (dB) CARRIER SUPPRESSION (dB) Figure 9. Carrier Suppression versus Frequency (Test 2) +40 +30 +20 +10 0 -10 -20 -30 -40 -50 -60 0.1 1.0 10.0 100.0 1.0 K fc, CARRIER FREQUENCY (MHz) fc, CARRIER FREQUENCY (MHz) Page 6 of 8 www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. Figure 10. Carrier Suppression versus Temperature -10 CARRIER SUPPRESSION (dB) -20 -30 fc = 10 MHz @ 30 mvrms fs = 10 KHz @ 150 mvrms -40 -50 -60 -55 -25 0 +25 +50 +75 +100 +125 TA, AMBIENT TEMPERATURE (C) Figure 11. Output Offset Current (I00) versus Temperature 1.0 f 2 Local Oscillator Inputs Outputs 1.0 f 1.0 f 8 Mixer Inputs Reg. Bypass 1 0.1f 10 11 I11 I A VEE 7 0.1 f 0.1 f 5 Null Adjust 6 VCC 14 IOO = I11 - I12 12 I12 I A 1.0 f 3 9 -5.0 V Notes: Test 1 - Pins 5 and 6 left open Test 2 - Pins 5 and 6 are tied to -5.0 volts Figure 12. Output Offset Current versus Temperature I OO, OUTPUT OFFSET CURRENT ( A) Figure 13. Typical Input Impedance versus Frequency (No Circuit) 400 31 R(OHMS) TYPICAL INPUT IMPEDANCE vs FREQUENCY Zin R C +100 R L RESISTANCE (Ohms) 350 300 250 200 150 100 50 -25 0 +25 +50 +75 +100 +125 26 C, CAPACITANCE (pF) 21 16 11 6 +50 TEST 1 0.0 -50 TEST 2 R C - LOCAL OSCILLATOR - AND SIGNAL INPUTS 1 -100 -55 200 400 600 800 1000 TA, AMBIENT TEMPERATURE (C) f, FREQUENCY (MHZ) Page 7 of 8 www.lansdale.com Issue 0 ML12502 LANSDALE Semiconductor, Inc. OUTLINE DIMENSIONS CERDIP 14 = C (ML12502/BCA) CASE 632 Lansdale Semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Lansdale does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. "Typical" parameters which may be provided in Lansdale data sheets and/or specifications can vary in different applications, and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by the customer's technical experts. Lansdale Semiconductor is a registered trademark of Lansdale Semiconductor, Inc. Page 8 of 8 www.lansdale.com Issue 0 |
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