SILICON MMIC
L BAND DOWNCONVERTER
FEATURES
• WIDE BAND OPERATION UP TO 2.5 GHz
• INTERNAL BALANCED AMPLIFIER FOR VCO
•
SINGLE ENDED PUSH-PULL IF AMPLIFIER
• 5 V SINGLE SUPPLY VOLTAGE:
I
CC
= 30 to 35 mA
• LOW CURRENT DISSIPATION
•
TAPE AND REEL PACKAGING OPTION AVAILABLE
OSC base
(feedback)
2
OSC base
(bypass)
1
UPC2721GR
UPC2722GR
INTERNAL BLOCK DIAGRAM
8
OSC
7
OSC
BUFFER
RF
IN1
RF
IN2
(bypass)
DESCRIPTION
The UPC2721 and UPC2722 are L-Band frequency convert-
ers manufactured using the NESAT III MMIC process. These
products consist of a double balanced mixer, local oscillator, IF
preamplifier, and constant voltage generator. These devices
are designed for low cost cellular radios, GPS receivers, PCS,
and UHF TV tuner applications.
The UPC2721 output amplifier is a single-end push-pull ampli-
fier designed for operation into a 50
Ω
load. The UPC2722
output amplifier is the collector of one side of a balanced
amplifier pair and operates best into a high impedance load.
The absence of capacitive coupling in the UPC2722 permits
better performance at IF frequencies below 25 MHz.
NEC's stringent quality assurance and test procedures ensure
the highest reliability and performance.
OSC collector
(coupling)
3
6
GND
IF
AMP
V
CC
4
REG.
MIX
5
IF
OUT
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, V
CC
= 5 V, P
LO
= -10 dBm)
PART NUMBER
PACKAGE OUTLINE
SYMBOLS
I
CC
f
RF
f
IF
CG
PARAMETERS AND CONDITIONS
Circuit Current
RF Frequency Range
IF Frequency Range
Conversion Gain
2
f
RF
= 900 to 2000MHz,
f
IF
= 50 to 400 MHz
f
IF
= 400 to 400 MHz
UNITS
mA
GHz
MHz
dB
dB
dB
dBm
dBm
dB
dB
dBm
dBm
MIN
29
0.9
50
18
21
22
19.5
7
7
9
11
+10
+8.5
13
15
UPC2721GR
G08
TYP
38
MAX
45.5
2.0
600
24
MIN
19
0.9
DC
15
18
19
17
6
6
9
11
+9
+8
13
15
UPC2722GR
G08
TYP
28
MAX
37
2.0
600
21
P
SAT
NF
IP
3
Saturated Output Power
2
f
RF
= 800 to 2000 MHz, f
IF
= 400 MHz
Noise Figure
f
RF
= 900 MHz, f
IF
= 400 MHz,
f
RF
= 2.0 GHz, f
IF
= 400 MHz
2
2
SSB Third Order Intercept Point,
f
1
= 900 MHz, f
2
= 938 MHz
f
1
= 2.0 GHz, f
2
= 2.038 GHz
Notes:
1. Mounted on a 50 x 50 x 1.6 mm thick glass epoxy board with double sided copper.
2. Minimum and maximum specifications for CG and P
SAT
are measured at f
RF
= 900 MHz and 2.0 GHz and at f
IF
= 402.8 MHz.
California Eastern Laboratories
UPC2721GR, UPC2722GR,
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= 25°C)
SYMBOLS
V
CC
P
T
T
OP
T
STG
PARAMETERS
Supply Voltage
2
Power Dissipation
3
Operating Temperature
Storage Temperature
UNITS
V
mW
°C
°C
RATINGS
6
250
-40 to +85
-65 to +150
Notes:
1. Operation in excess of any one of these parameters may result
in permanent damage.
2. Recommended operating V
CC
range is 4.5 to 5.5 V max.
3. T
A
= +85°C mounted on a 50 x 50 x 1.6 mm thick glass epoxy
board with double sided copper.
PIN DESCRIPTIONS
PIN
NO.
1
SYMBOL
OSC
base
(bypass)
PIN VOLT
TYP (V)
2.9
DESCRIPTION
Internal oscillator consists of a
balance amplifier. Pin 2 and pin 3
should be externally equipped with a
tank resonator circuit in order to
oscillate with feedback loop.
Pin 1 should be grounded through
coupling capacitor ~0.5 pF.
EQUIVALENT CIRCUIT
2
Vcc
3
1
2
OSC
base
(feedback)
2.9
3
OSC
collector
(coupling)
V
CC
IF Output
5.0
Pin 3 is an open collector. This pin should
be coupled through resistor or choke coil
in order to adjust Q and connect the
supply voltage.
Supply voltage pin for the IC.
In the UPC2721 the amplifier is designed
as single-ended push-pull amplifier. This
pin is an emitter follower output with a
wideband 50
Ω
impedance.
UPC2721
4
5
5.0
UPC2721
2.9
40
Ω
5
UPC2722
5.0
In the UPC2722 the IF amplifier is
designed as a balanced amplifier. This pin
is an open collector output with high
impedance dependent on external
inductance.
UPC2722
5
6
7
GND
RF input2
(bypass)
0.0
2.4
GND pin for the IC.
Pin 7 and pin 8 are inputs to a double-
balanced mixer. Either pin can be
assigned for input or ground.
8
RF input1
2.4
7
8
UPC2721GR, UPC2722GR
TYPICAL PERFORMANCE CURVES
(T
A
= 25°C)
CIRCUIT CURRENT VS.
SUPPLY VOLTAGE
60
No Input Signal
+10
f
RF
= 2 GHz
f
RF
= 900 MHz
f
RF
= 2 GHz
0
f
RF
= 900 MHz
-5
OUTPUT POWER VS.
INPUT POWER
Output Power, P
OUT
(dBm)
Circuit Current, I
CC
(mA)
50
UPC2721
40
+5
20
UPC2722
10
-10
V
CC
= 5 V
f
IF
= 402 MHz
-15
0
1
2
3
4
5
6
-20
-40
-30
-20
-10
0
+10
+20
Supply Voltage, V
CC
(V)
UP
C2
30
CONVERSION GAIN AND NOISE FIGURE
vs. RF FREQUENCY
30
V
CC
= 5 V
P
RF
= -30 dBm
P
LO
= -5 dBm
f
IF
= 402 MHZ
CG
20
UPC2721 GV
UPC2722 GV
UPC2721 GV
10
NF
5
UPC2722 GV
30
25
20
µPC2721
fRF
fRF
72
1
UP
C2
722
Input Power, P
IN
(dBm)
UPC2721
CONVERSION GAIN
vs. IF FREQUENCY
Noise Figure, NF (dB)
Conversion Gain, CG (dB)
Conversion Gain, CG (dB)
25
= 2.0 GH
Z
= 900 MH
Z
15
15
10
5
V
CC
= 5 V
P
LO
= 0 dBm
P
RF
= -30 dBm
100
200
300
400
500
600
0
0.5
1.0
1.5
2.0
2.5
3.0
0
Input Frequency, f
RF
(GHz)
IF Frequency, f
IF
(MHz)
Output Power, P
OUT
(dBm)
3rd Order Intermodulation Distortion, IM
3
(dBm)
Output Power, P
OUT
(dBm)
3rd Order Intermodulation Distortion, IM
3
(dBm)
UPC2721
IM
3
AND OUTPUT POWER
vs. INPUT POWER
+10
UPC2722
IM
3
AND OUTPUT POWER
vs. INPUT POWER
+10
0
0
-10
-20
-30
-40
-50
Pout
Pout
-10
-20
-30
-40
-50
-60
-40
-30
-20
-10
0
IM
3
IM
3
f
RF1
= 900 MH
Z
f
RF2
= 938 MH
Z
f
LO
= 1.3 GH
Z
f
RF1
= 2.0 GH
Z
f
RF2
= 2.038 GH
Z
f
LO
= 2.4 GH
Z
-60
f
RF1
= 900 MH
Z
f
RF2
= 938 MH
Z
f
LO
= 1.3 GH
Z (0 dBm)
f
RF1
= 2.0 GH
Z
f
RF2
= 2.038 GH
Z
f
LO
= 2.4 GH
Z (0 dBm)
-40
-30
-20
-10
0
Input Power, P
IN
(dBm)
Input Power, P
IN
(dBm)
UPC2721GR, UPC2722GR
TYPICAL PERFORMANCE CURVES
UPC2721
OSC FREQUENCY STABILITY
vs. OSC FREQUENCY
(T
A
= 25
°
C)
UPC2722
OSC FREQUENCY STABILITY
vs. OSC FREQUENCY
Oscillation Frequency Stability, f
STB
(MHz)
V
CC
= 4.5 V
+4.0
Oscillation Frequency Stability, f
STB
(MHz)
+6.0
+6.0
V
CC
= 5.5 V
+4.0
V
CC
= 4.5 V
V
CC
= 5.5 V
+2.0
+2.0
0
0
V
CC
= 5.5 V
-2.0
V
CC
= 4.5 V
-2.0
-4.0
-4.0
V
CC
= 5.5 V
V
CC
= 4.5 V
-6.0
-1.4
-1.5
-1.6
-1.7
-1.8
-1.9
-2.0
-2.1
-2.2
-6.0
-1.4
-1.5
-1.6
-1.7
-1.8
-1.9
-2.0
-2.1
-2.2
Oscillation Frequency, f
OSC
(GHz)
Oscillation Frequency, f
OSC
(GHz)
TEST CIRCUITS
External LO Test Circuit
100 pF
1
0.5 pF
8
RF IN
LO IN
100 pF
10
Ω
2
7
2 pF
20 pF
3
100
Ω
4
100 pF
20 pF
6
*
L 2
5
0.8
pF
1.5
pF
1000 pF
IF OUT
1.8
µH
5.0 V
5.0 V
UPC2722 Only
*L
2
= 3 turn, 0.4 diameter wire; 4.0 mm coil inside diameter. (Approximately 37 nH)
UPC2721GR, GV, UPC2722GR, GV
APPLICATION CIRCUIT
V
TUNE
1000 pF
51k
100 pF
ALPHA
SMV1204-04
1
3.3nH
1pF
2
1pF
1pF
3
47
4
5
0.8
pF
1.5
pF
1.8
µH
6
7
2 pF
20 pF
8
RF IN
*
L 2
1000 pF
IF OUT
18nH
5.0 V
10pF
UPC2722 Only
20pF
5.0 V
*L
2
= 3 turn, 0.4 diameter wire; 4.0 mm coil inside diameter. (Approximately 37 nH)
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