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 ana-
log 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 dif-
ferential 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 applica-
tions 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 +125°C
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
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