The MC13142 is intended to be used as a first amplifier, voltage controlled
oscillator and down converter for RF applications. It features wide band
operation, low noise, high gain and high linearity while maintaining low
current consumption. The circuit consists of a Low Noise Amplifier (LNA), a
Voltage Controlled Oscillator (VCO), a buf fered oscillator output, a mixer, an
Intermediate Frequency amplifier (IF
mixer IF bandwidth allows this part also to be used as an up converter and
exciter amplifier.
• Wide RF Bandwidth: DC–1.8 GHz
• Wide LO Bandwidth: DC–1.8 GHz
• Wide IF Bandwidth: DC–1.8 GHz
• Low Power: 13 mA @ V
• High Mixer Linearity: P
= 2.7 – 6.5 V
CC
i1.0 dB
= 3.0 dBm
• Linearity Adjustment Increases IP
• Single–Ended 50 Ω Mixer Input
• Double Balanced Mixer Operation
• Open Collector Mixer Output
• Single Transistor Oscillator with Collector, Base and Emitter Pinned Out
• Buffered Oscillator Output
) and a dc control section. The wide
amp
Up to 20 dBm
3in
LOW POWER DC – 1.8 GHz
LNA, MIXER and VCO
SEMICONDUCTOR
TECHNICAL DATA
16
1
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16)
PIN CONNECTIONS
SO–16
EN
1
RF
2
in
V
3
EE
Osc E
4
Osc B
5
Osc C, V
This device contains 176 active transistors.
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
MOTOROLA RF/IF DEVICE DATA
V
CC
Buff
CC
6
7
8
Mx Lin
Cont
RF
16
V
15
CC
Mix Lin Cont
14
RF
13
V
EE
12
IF+
11
IF–
10
9
V
EE
out
m
ORDERING INFORMATION
Operating
Device
MC13142DTA = –40° to +85°CSO–16
Motorola, Inc. 1998Rev 1
Temperature Range
Package
1
MC13142
A
mA
MAXIMUM RATINGS (T
Power Supply VoltageV
Operating Supply Voltage RangeV
NOTE: ESD data available upon request.
ELECTRICAL CHARACTERISTICS (V
Supply Current (Disable)I
Pin 15 with Pin 1 @ 0 VI
Pin 10 and 11 with Pin 1 @ 0 VI
Pin 6 with Pin 1 @ 0 VI
Supply Current (Enable)I
Pin 15 with Pin 1 @ 3.0 VI
Pin 10 with Pin 1 @ 3.0 VI
Pin 6 with Pin 1 @ 3.0 VI
Amplifier Gain (50 Ω Insertion Gain)S
Amplifier Reverse IsolationS
Amplifier Input MatchΓin
Amplifier Output MatchΓ
Amplifier 1.0 dB Gain CompressionPin
Amplifier Input Third Order InterceptIP3
Amplifier Noise Figure (Application Circuit)NF1.01.84.0dB
Amplifier Gain @ N.F.G
Mixer Voltage Conversion Gain (RP = RL = 800 Ω)VG
Mixer Power Conversion Gain (RP = RL = 800 Ω)PG
Mixer Input MatchΓin
Mixer SSB Noise FigureNF
Mixer 1.0 dB Gain CompressionPin
Mixer Input Third Order InterceptIP3
Oscillator Buffer Drive (50 Ω)P
Oscillator Phase Noise @ 25 kHz OffsetN
RFin Feedthrough to RF
RF
Feedthrough to RF
out
LO Feedthrough to IFP
LO Feedthrough to RF
LO Feedthrough to RF
Mixer RF Feedthrough to IFP
Mixer RF Feedthrough to RF
= 25°C, unless otherwise noted.)
A
Rating
= 3.0 V, TA = 25°C, LOin = –10 dBm @ 950 MHz, IF @ 50 MHz.)
The MC13142 is a low power LNA, double–balanced
Mixer, and VCO. This device is designated for use as the
frontend section in analog and digital FM systems such as
Digital European Cordless Telephone (DECT), PHS, PCS,
Cellular, UHF and 800 MHz Special Mobile Radio (SMR),
UHF Family Radio Services and 902 to 928 MHz cordless
telephones. It features a mixer linearity control to preset or
auto program the mixer dynamic range, an enable function
and a wideband IF so the IC may be used either as a down
converter or an up converter. Further details are covered in
the Pin by Pin Description which shows the equivalent
internal circuit and external circuit requirements.
Current Regulation/Enable
Temperature compensating voltage independent current
regulators are controlled by the enable function in which
“high” powers up the IC.
Low Noise Amplifier (LNA)
The LNA is internally biased at low supply current
(approximately 2.0 mA emitter current) for optimal noise
figure and gain. The LNA output is biased internally with a
600 Ω resistor to VCC. Input and output matching may be
achieved at various frequencies using few external
components. Matching the LNA for Maximum stable gain
(MSG) yields noise performance within a few tenths of a dB
of the minimum noise figure.
Mixer
The mixer is a double–balanced four quadrant multiplier
biased class AB allowing for programmable linearity control
via an external current source. An input third order intercept
point of 20 dBm may be achieved. All 3 ports of the mixer are
designed to work up to 1.8 GHz. The mixer has a 50 Ω
single–ended RF input and open collector differential IF
outputs. An on–board Local Oscillator transistor has the
emitter, base and collector pinned out to implement a low
phase noise VCO in various configurations. Additionally, a
buffered LO output is provided for operation with a frequency
synthesizer. The linear gain of the mixer is approximately
0 dB with a SSB noise figure of 12 dB in the IF output circuit
configuration shown in the application example.
Local Oscillator
The on–chip transistor operates with coaxial transmission
line or LC resonant elements to over 2.0 GHz. Biasing is
done with a temperature compensated current source in the
emitter and a collector to base internal resistor of 7.6 kΩ;
however, an RFC from VCC to base is recommended. The
application circuit shows a voltage controlled Clapp oscillator
operating at center frequency of 975 MHz.
MOTOROLA RF/IF DEVICE DATA
3
MC13142
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
RF
V
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Osc C
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
LO Buf
Á
Á
Á
Á
Pin
16 Pin
SOIC
1
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
2
ÁÁÁ
ÁÁÁ
3
ÁÁÁ
ÁÁÁ
ÁÁÁ
16
ÁÁÁ
ÁÁÁ
Symbol
EN
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
RF
in
ÁÁ
ÁÁ
V
EE
ÁÁ
ÁÁ
ÁÁ
RF
out
ÁÁ
ÁÁ
PIN FUNCTION DESCRIPTION
Equivalent Internal Circuit
(20 Pin LQFP)
V
CC
40 k1
2.0 V
V
CC
70 k
2.0 V
ref2
V
EE
RF
V
EN
16
out
2
in
3
EE
BE
BE
Description
Enable, E Osc
In SO–16, both enables, (for the Oscillator/LO Buffer and
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LNA/Mixer) are bonded to Pin 1. Enable by pulling up to
VCC or to greater than 2.0 VBE.
БББББББББББББ
БББББББББББББ
БББББББББББББ
БББББББББББББ
БББББББББББББ
БББББББББББББ
БББББББББББББ
БББББББББББББ
БББББББББББББ
V
CC
600
RF Input
The input is the base of an NPN low noise amplifier.
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Minimum external matching is required to optimize the
input return loss and gain.
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VEE – Negative Supply
VEE pin is taken to an ample dc ground plane through a
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low impedance path. The path should be kept as short
as possible. A two sided PCB is implemented so that
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ground returns can be easily made through via holes.
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RF Output
The output is from the collector of the LNA; it is internally
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biased with a 600 Ω resistor to VCC. As shown in the 926
MHz application receiver the output is conjugately
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matched with a shunt L, and series L and C network.
2.0 mA
V
ref3
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
4
5
6
6
8
7
4
Osc E
ÁÁ
Osc B
Osc C
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
V
CC
V
CC
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
LO Buff
ÁÁ
ÁÁ
ÁÁ
ÁÁ
4
Osc E
5
Osc B
6
Osc C
6
V
CC
V
7.6 k
7
8
CC
On–Board VCO Transistor
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10
The transistor has the emitter, base and collector + V
pins available. Internal biasing which is compensated for
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stability over temperature is provided. It is recommended
БББББББББББББ
that the base pin is pulled up to VCC through an RFC
1.5
mA
V
EE
chosen for the particular oscillator center frequency. The
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application circuit shows a modified Colpitts or Clapp
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oscillator configuration and its design is discussed in
detail in the application section.
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CC
Supply Voltage (VCC)
V
EE
V
CC
Two VCC pins are provided for the Local Oscillator and
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LO Buffer Amplifier. The operating supply voltage range
БББББББББББББ
is from 2.7 Vdc to 6.5 Vdc. In the PCB layout, the V
trace must be kept as wide as feasible to minimize
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inductive reactances along the trace. VCC should be
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decoupled to VEE at the IC pin as shown in the
component placement view.
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CC
Local Oscillator Buffer
1.0
mA
V
EE
This is a buffered output providing –16 dBm
БББББББББББББ
(50 Ω termination) to drive the fin pin of a PLL
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synthesizer. Impedance matching to the synthesizer may
be necessary to deliver the optimal signal and to
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improve the phase noise performance of the VCO.
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MOTOROLA RF/IF DEVICE DATA
Pin
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
Á
16 Pin
SOIC
9, 12
ÁÁÁ
ÁÁÁ
ÁÁÁ
10, 11
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
Symbol
Symbol
V
EE
ÁÁ
ÁÁ
ÁÁ
IF–, IF+
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
PIN FUNCTION DESCRIPTION (continued)
Equivalent Internal Circuit
Equivalent Internal Circuit
(20 Pin LQFP)
(20 Pin LQFP)
10
IF–
9
V
V
CC
EE
11
IF+
12
V
EE
MC13142
V
CC
Description
Description
VEE, Negative Supply
These pins are VEE supply for the mixer IF output. In the
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application PC board these pins are tied to a common
VEE trace with other VEE pins.
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БББББББББББББ
IF Output
The IF is a differential open collector configuration which
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designed to use over a wide frequency range for up
conversion as well as down conversion. Differential to
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single–ended circuit configuration and matching options
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are discussed in the application section. 6.0 dB of
additional Mixer gain can be achieved by conjugately
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matching at the desired IF frequency.
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13
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
14
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
15V
RF
m
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Mix Lin
ÁÁ
Cont
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
CC
13
RF
m
14
Mix Lin
Cont
15
V
CC
V
CC
V
ref1
V
EE
33
The mixer input impedance is broadband 50 Ω for
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applications up to 1.8 GHz. It easily interfaces with a RF
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ceramic filter as shown in the application schematic.
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Mixer Linearity Control
Mixer RF Input
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The mixer linearity control circuit accepts approximately
0 to 2.3 mA control current to set the dynamic range of
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the mixer. An Input Third Order Intercept Point, IIP3 of
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20 dBm may be achieved at 2.3 mA of control current
(approximately 7.0 mA of additional supply current).
БББББББББББББ
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БББББББББББББ
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400
33
µ
A
VCC, Power Supply
V
CC
MOTOROLA RF/IF DEVICE DATA
5
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