UPB1008 NEC [NEC], UPB1008 Datasheet - Page 6

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

PIN FUNCTIONS
Pin No.
12
13
14
15
16
17
DC offset Qb
I/Q Balance
DC offset Q
2IFout-Qb
2IFout-Q
Symbol
Control
PD1
Standby mode control.
Low=whole chip OFF & High=Whole chip ON.
Differential ouptut pins of quadrature demodulator
Q output. Adding a lowpass shunt capacitor
between these pins will define the IF Bandwidth.
DC offset compensation pin for C arm. A low pass
capacitor shunt to Pin 17 is required.
DC offset compensation pin for Q-bar arm.
A low pass capacitor shunt to Pin 16 is required.
Function and Application
The voltage on this pin controls the Q channel
IF Amplifier Gain. Gain control of ±2 dB can be
achieved for 0~3 V.
Leave open-circuited if not used.
Qgain
0 V
1.5 V
3 V
V
12
idc=23.5u
idc=84u
r=7.1k
13
Internal Equivalent Circuit
r=4k
idc=86u
r=2k
r=7.1k
V
CC
idc=84u
r=4k
r=20k
r=2k
ESD
idc=86u
ESD
32
28
28
32
11
Iref
28
32
r=7.1k
c=9p
ESD
ESD
ESD
ESD
ESD
ESD
UPB1008K
idc=23.5u
r=28k
ESD
ESD
r=7.1k
15,(26)
14,(27)
17,(24)
16,(25)
CCCS