EVB7122 Melexis Company, EVB7122 Datasheet - Page 11

• Manufacturer Part Number: EVB7122
• Description: Evaluation Board For Th7122 And Th71221
• Manufacturer: Melexis Company

3.1.4
39012 07122 02
Rev. 006
LNACTRL
VCOCUR
PFDPOL
BAND
Name
NR
C – word
[19:18]
[16:0]
Bits
[17]
[20]
[21]
64d .. 131071d
00
01
10
11
0
1
0
1
0
1
recommended at f
recommended at f
Some tail current sources are linked to this bit in order to save current for low frequency
operations.
low current (300 µA)
standard current (500 µA)
high1 current (700 µA)
high2 current (900 µA)
negative
#default
positive
external LNA gain control
LNA gain will be set via pin GAIN_LNA.
internal LNA gain control
LNA gain will be set via bit LNAGAIN (bit 12 in A-word). Nevertheless pin GAIN_LNA must
be connected to either VCC or VEE.
Page 11 of 24
Feedback divider ratio in RX operation mode
FREQUENCY
Set the desired frequency range
OUTPUT
RF
RF
VCO
Phase Detector polarity
< 500 MHz
> 500MHz
LNA gain control mode
VCO active current
VCO INPUT VOLTAGE
Description
Evaluation Board Description
27 to 930MHz Transceiver
pos
neg
EVB7122
EVB Description
#default
June/08