UPB1008 NEC [NEC], UPB1008 Datasheet - Page 5

• Manufacturer Part Number: UPB1008
• Description: NECs LOW POWER GPS RF RECEIVER
• Manufacturer: NEC [NEC]

UPB1008K
PIN FUNCTIONS
Pin No.
10
11
1
2
3
4
5
6
7
8
9
1stLO-OSC1
1stLO-OSC2
GNDlna
GNDdig
VCCdig
Symbol
GNDlo
VCClo
PDout
REFin
LNAin
VCCrf
Ground pin of LNA
Input pin of low noise amplifier. It is a
single-ended open collector design.
Capacitive coupling is required; external
matching will improve gain or NF.
Supply voltage pin of LNA, RF mixer and VCO
voltage regulator.
Ground pin of 1st LO Oscillator circuit and RF
Mixer.
Pin 5 & 6 are base pins of the differential
amplifier for 1st LO oscillator. These pins
require an LC (varacator) tank circuit to
oscillate at around 1400 MHz.
Supply voltage pin of oscillator circuit for
1st LO Oscillator and RF mixer
This is a current mode charge pump output.
For connection to a passive RC loop filter for driving
external varactor diode of 1stLO-OSC.
Supply voltage pin of digital portion of the chip.
Input pin of reference frequency buffer. This pin
should be equipped with external 27 MHz
oscillator (e.g. TCXO).
Ground pin of digital portion of the chip.
Function and Application
10
6
Regulator
3
2
GND
V
CC
ESD
ESD
Internal Equivalent Circuit
3
Regulator
7
4
r=300
r=4.4k
V
GND
r=20k
CC
Source Control
Sink Control
r=500
9
11
idc=22u
idc=941u
r = 410
r=500
1
r=20k
11
9
c=5.4p
r=300
ESD
ESD
36
8
r=4.4k
idc=9.7u
r=30k
5