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PDF UPC1678 Data sheet ( Hoja de datos )
| Número de pieza | UPC1678 | |
| Descripción | 5 V-BIAS/ +7.5 dBm OUTPUT/ 2.0 GHz WIDEBAND Si MMIC AMPLIFIER | |
| Fabricantes | NEC | |
| Logotipo |  |
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DATADASTHAESEHT EET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µPC1678G
5 V-BIAS, +17.5 dBm OUTPUT, 2.0 GHz WIDEBAND
Si MMIC AMPLIFIER
DESCRIPTION
The µPC1678G is a silicon monolithic integrated circuit designed as medium output power amplifier for high
frequency system applications. Due to +17.5 dBm TYP. output at 2 GHz, this IC is recommendable for transmitter
stage amplifier of L BAND wireless communication systems. This IC is packaged in 8-pin plastic SOP.
This IC is manufactured using NEC’s 20 GHz fT NESAT™IV silicon bipolar process. This process uses silicon
nitride passivation film and gold electrodes. These materials can protect chip surface from external pollution and
prevent corrosion/migration. Thus, this IC has excellent performance, uniformity and reliability.
FEATURES
• Supply voltage
• Saturated output power
• Wideband response
• Power gain
• Isolation
: VCC = 4.5 to 5.5 V
: PO(sat) = +17.5 dBm TYP. @ f = 500 MHz with external inductor
: fu = 2.0 GHz TYP. @ 3 dB bandwidth
: GP = 23 dB TYP. @ f = 500 MHz
: ISL = 35 dB TYP. @ f = 500 MHz
APPLICATIONS
• PA driver for high frequency system.
ORDERING INFORMATION
Part Number
µPC1678G
µPC1678G -E1
Package
8-pin plastic SOP (225 mil)
µPC1678G -E2
Marking
1678
Supplying Form
Plastic magazine case
Embossed tape 12 mm wide.
1 pin is tape pull-out direction.
Qty 2.5 kp/reel.
Embossed tape 12 mm wide.
1 pin is tape roll-in direction.
Qty 2.5 kp/reel.
Remark To order evaluation samples, please contact your local NEC sales office.
(Part number for sample order: µPC1678G)
Caution Electro-static sensitive devices
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. P11491EJ4V0DS00 (4th edition)
Date Published September 1999 N CP(K)
Printed in Japan
The mark shows major revised points.
©
1996, 1999
1 page  
TEST CIRCUIT
1 800 pF
VCC
µPC1678G
50 Ω
IN
1
1 800 pF
8
L
50 Ω
5
OUT
1 800 pF
2, 3, 4, 6, 7
L: 20.5 T, 2 mm I.D., φ 0.25 UEW
(about 300 nH)
INDUCTOR FOR THE OUTPUT PIN
The internal output transistor of this IC consumes 30 mA, to output medium power. To supply current for output
transistor, connect an inductor between the VCC pin (pin 8) and output pin (pin 5).
The inductor has both DC and AC effects. In terms of DC, the inductor biases the output transistor with minimum
voltage drop to output enable high level. In terms of AC, the inductor make output-port impedance higher to get
enough gain. In this case, large inductance and Q is suitable.
CAPACITORS FOR THE VCC, INPUT AND OUTPUT PINS
Capacitors of 1 800 pF are recommendable as the bypass capacitor for the VCC pin and the coupling capacitors
for the input and output pins.
The bypass capacitor connected to the VCC pin is used to minimize ground impedance of VCC pin. So, stable bias
can be supplied against VCC fluctuation.
The coupling capacitors, connected to the input and output pins, are used to cut the DC and minimize RF serial
impedance. Their capacitance are therefore selected as lower impedance against a 50 Ω load. The capacitors thus
perform as high pass filters, suppressing low frequencies to DC.
To obtain a flat gain from 100 MHz upwards, 1 800 pF capacitors are used in the test circuit. In the case of under
100 MHz operation, increase the value of coupling capacitor such as 10 000 pF. Because the coupling capacitors
are determined by equation, C = 1/(2 πRfc).
Data Sheet P11491EJ4V0DS00
5
5 Page 
PACKAGE DIMENSIONS
8 PIN PLASTIC SOP (225 mil) (Unit: mm)
85
µPC1678G
detail of lead end
14
A
F
G
S
B
EC
K
D MM
NOTE
Each lead centerline is located within 0.12 mm of
its true position (T.P.) at maximum material condition.
L
P
H
IJ
NS
ITEM MILLIMETERS
A 5.2±0.2
B 0.85 MAX.
C 1.27 (T.P.)
D 0.42+−00..0087
E 0.1±0.1
F 1.57±0.2
G 1.49
H 6.5±0.3
I 4.4±0.15
J 1.1±0.2
K 0.17+−00..0087
L 0.6±0.2
M 0.12
N 0.10
P
3°
+7°
−3°
Data Sheet P11491EJ4V0DS00
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet UPC1678.PDF ] | |
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