Motorola MRFIC1804 Datasheet
SEMICONDUCTOR TECHNICAL DATA
The MRFIC Line
Designed primarily for use in DECT, Japan Personal Handy Phone (JPHP),
and other wireless Personal Communication Systems (PCS) applications. The
MRFIC1804 includes a low noise amplifier and downmixer in a low-cost
SOIC-16 package. The integrated circuit requires minimal off-chip matching
while allowing for the maximum in flexibility and efficiency. The mixer is
optimized for low side injection and offers reasonable intercept point as well as
high efficiency and 4 dB of conversion gain. Image filtering is implemented
off-chip to allow maximum flexibility. With both TX and RX enable pins low, the
device is in standby mode and draws less than 0.5 mA.
Together with the rest of the MRFIC180X series, this GaAs IC family offers
the complete transmit and receive functions, less LO and filters, needed for a
typical 1.8 GHz cordless telephone.
• Usable Frequency Range = 1.5 to 2.2 GHz
• 14 dB Gain, 2.3 dB Noise Figure LNA
• 4 dB Gain, 13 dB Noise Figure Mixer
• 0.9 dB Mixer Input Intercept Point
• Simple LO/IF Off-Chip Matching for Maximum Flexibility
• Low Power Consumption = 24 mW (Typ)
• Single Bias Supply = 2.7 to 3.3 V
• Low LO Power Requirement = – 5 dBm (Typ)
• Low Cost Surface Mount Plastic Package
• Available in Tape and Reel by Adding R2 Suffix to Part Number.
R2 Suffix = 2,500 Units per 16 mm, 13 inch Reel.
• Device Marking = M1804
Order this document
by MRFIC1804/D
1.8 GHz LOW NOISE
AMPLIFIER AND
DOWNMIXER
GaAs MONOLITHIC
INTEGRATED CIRCUIT
CASE 751B-05
(SO–16)
REV 2
1
V
DD
2
GND
3
RF IN
4
GND
GND
LNA OUT
GND
RX EN
5
6
7
8
MIXER
LNA
Pin Connections and Functional Block Diagram
16
15
14
13
12
11
10
9
IF OUT/V
GND
LO IN
GND
GND
LNA IN
GND
V
DD
DD
Motorola, Inc. 1995
MRFIC1804MOTOROLA RF DEVICE DATA
1
MAXIMUM RATINGS (T
= 25°C unless otherwise noted)
A
Rating Symbol Limit Unit
Supply Voltage V
LNA Input Power (Standby Mode) LNA
LO Input Power P
Receive Enable Voltage RX EN 5 Vdc
Storage Temperature Range T
Operating Ambient Temperature T
DD
in
LO
stg
A
5 Vdc
10 dBm
0 dBm
– 65 to +150 °C
– 30 to +85 °C
RECOMMENDED OPERATING RANGES
Parameter
RF Input Frequency f
Mixer LO Frequency f
IF Output Frequency f
Supply Voltage V
Receive Enable Voltage RX EN 2.7 to 3.3 Vdc
Symbol Value Unit
RF
LO
IF
DD
1.8 to 1.925 GHz
1.5 to 1.9 GHz
70 to 325 MHz
2.7 to 3.3 Vdc
ELECTRICAL CHARACTERISTICS (V
Characteristic
LNA Gain — 14 — dB
LNA Noise Figure — 2.3 — dB
LNA Input 3rd Order Intercept — –11 — dBm
Mixer Conversion Gain (into 50 Ω) — 4 — dB
Mixer Noise Figure — 13 — dB
Mixer Input 3rd Order Intercept — 0.9 — dBm
Downconverter Gain (Less Image Filter Loss) 16 — — dB
Supply Current, RX Mode (RX EN = 3 V, LO
Standby Mode Current (RX EN = 0 V, LO off) — — 0.5 mA
IF OUT
C1
L1
V
DD
C5
C2
15 14 13 12 11 10 9
16
12345678
= 3 V, TA = 25°C, LO = 1790 MHz @ – 5 dBm, RF = 1.9 GHz , RX EN = 3 V)
DD
Min Typ Max Unit
) — 7 10 mA
off
LO IN
L2
LNA IN
L3
V
DD
C3
C1 12 pF (110 MHz) or 7.5 pF (240 MHz)
C2 0.8 pF
C3, C4 100 pF
C5 1000 pF
L1 82 nH (110 MHz) or 15 nH (240 MHz)
L2 8.2 nH
L3, L4 3.0 nH (Microstrip)
MRFIC1804
2
LNA OUTMIXER IN
L4
RX EN
C4
V
DD
Figure 1. Applications Circuit Configuration (for 110 MHz and 240 MHz IF)
MOTOROLA RF DEVICE DATA
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