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PDF UPC8126K-E1 Data sheet ( Hoja de datos )
| Número de pieza | UPC8126K-E1 | |
| Descripción | 900 MHz BAND DIRECT QUADRATURE MODULATOR IC FOR DIGITAL MOBILE COMMUNICATION SYSTEMS | |
| Fabricantes | NEC | |
| Logotipo |  |
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PRELIMINARY DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µPC8126K
900 MHz BAND DIRECT QUADRATURE MODULATOR IC
FOR DIGITAL MOBILE COMMUNICATION SYSTEMS
DESCRIPTION
The µPC8126K is a silicon monolithic integrated circuit designed as quadrature modulator for digital mobile
communication systems. This IC integrates a pre-mixer for local signals plus a quadrature modulator operating from
889 MHz to 960 MHz. The chip which has been conventionally packaged in 20-pin SSOP is packaged in 28-pin QFN
and therefore is suitable for higher density mounting. In addition, the IC has power save function and can operate
2.7 to 3.6 V supply voltage. Consequently the µPC8126K can contribute to make RF blocks smaller size, higher
performance and lower power consumption.
FEATURES
• Directly modulate in 889 MHz to 960 MHz
• Built-in pre-mixer for local signals
• External IF filter can be applied between modulator output and pre-mixer input terminal.
• Current consumption ICC = 35 mA TYP. @ VCC = 3.0 V
• Equipped with power save function.
• 28-pin QFN suitable for higher density mounting.
APPLICATIONS
• Digital cellular phones: PDC800M
ORDERING INFORMATION
Part Number
Package
µPC8126K-E1
28-pin plastic QFN (5.1 × 5.5 × 0.95 mm)
Supplying Form
Embossed tape 12 mm wide.
QTY 2.5 kp/reel.
Pins 1 through 10 are in pull-out direction.
Remark To order evaluation samples, please contact your local NEC sales office .
(Part number for sample order: µPC8126K)
Caution Electro-static sensitive device
The information in this document is subject to change without notice.
Document No. P13488EJ1V0DS00 (1st edition)
Date Published February 1999 N CP(K)
Printed in Japan
©
1999
1 page  
µPC8126K
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Power Save Control Voltage
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Symbol
VCC
VPS
PD
TA
Tstg
Test Conditions
TA = +25 °C
TA = +25 °C
TA = +85 °CNote
Rating
4.0
4.0
430
–40 to +85
–55 to +150
Unit
V
V
mW
°C
°C
Note Mounted on a 50 × 50 × 1.6 mm double sided copper clad epoxy glass PWB.
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Operating Ambient Temperature
Pre-Mix. RF Input Frequency
Pre-Mix. RF Input Power
Pre-Mix. IF Input Frequency
Pre-Mix. IF Input Power
Pre-Mix. Output Frequency
(Modulator Output Frequency,
Modulator LO Input Frequency)
Modulator LO Input Power
I/Q Input Frequency
I/Q Input Amplitude
Symbol
VCC
TA
fRFin
PRFin
fIFin
PIFin
fMIXout
(fMODout, fLOin)
Test Conditions
P (fIF × 7) ≤ –65 dBc
fIFin = 200 MHz
fIFin = 135 MHz
PLOin
fI/Qin
VI/Qin
Single ended Input
Differential Input
MIN.
2.7
–25
689
–13
120
–14
889
915
TYP.
3.0
+25
–
–11
135
–12
–
–
MAX.
3.6
+75
1 200
–9
270
–10
898
960
Unit
V
°C
MHz
dBm
MHz
dBm
MHz
MHz
–21.5
DC
–
–
–18.5
–
–
–
–15.5
10
500
250
dBm
MHz
mVP-P
Preliminary Data Sheet P13488EJ1V0DS00
5
5 Page 
µPC8126K
RELATION BETWEEN I/Q PIN INPUT DC VOLTAGE AND AMPLITUDE
Supply Voltage (V)
VCC
2.7 to 3.6
I/Q DC Voltage (V)
VCC/2 = I = Ib = Q = Qb
1.35 to 1.8
I/Q input signal (mVP-P)
Single ended input
I=Q
Differential input
I = Ib = Q = Qb
≤ 500
≤ 250
EXPLANATION OF INTERNAL FUNCTION
Block
90° PHASE
SHIFTER
Function/Operation
Input signal from LO is send to digital circuit of
T-type flip-flop through frequency doubler.
Output signal from T-type F/F is changed to
same frequency as LO input and that have
quadrature phase shift, 0°, 90 °, 180°, 270°.
These circuits have function of self phase
correction to make correctly quadrature
signals.
Block Diagram
from LOin
×2
÷2F/F
BUFFER AMP.
Buffer amplifiers for each phase signals to
send to each mixers.
MIXER
ADDER
Each signals from buffer amp. are quadrature
modulated with two double-balanced mixers.
High accurate phase and amplitude inputs are
realized to good performance for image
rejection.
I
Ib
Output signals from each mixers are added
with adder and send to final amplifier.
Qb
Q
to MODout
Preliminary Data Sheet P13488EJ1V0DS00
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet UPC8126K-E1.PDF ] | |
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