Analog Devices AD9361 User Manual

UG-570 AD9361 Reference Manual
| Page 52 of 128
Table 35. Gain Step Calibration Register Values vs. LO Frequency
LO Frequency
Range (MHz) Step Description
Step
Value (dB)
Register Value
(hex)
Variable in Table 36, Table 37,
and Table 39
600 to 1300 Maximum LNA Gain 24 C0 Xx
LNA Gain difference word for Index 0 23 2E Aa
LNA Gain difference word for Index 1
8
10
Bb
LNA Gain difference word for Index 2 3 6 Cc
LNA Gain difference word for Index 3 0 0 Dd
1300 to 3300 Maximum LNA Gain 24 C0 Xx
LNA Gain difference word for Index 0
22
2C
Aa
LNA Gain difference word for Index 1 8 10 Bb
LNA Gain difference word for Index 2 3 6 Cc
LNA Gain difference word for Index 3 0 0 Dd
2700 to 4100 Maximum LNA Gain 23 B8 Xx
LNA Gain difference word for Index 0 22 2C Aa
LNA Gain difference word for Index 1 8 10 Bb
LNA Gain difference word for Index 2 3 6 Cc
LNA Gain difference word for Index 3 0 0 Dd
4000 to 6000 Maximum LNA Gain 20 A0 Xx
LNA Gain difference word for Index 0 18 24 Aa
LNA Gain difference word for Index 1 8 10 Bb
LNA Gain difference word for Index 2 3 6 Cc
LNA Gain difference word for Index 3 0 0 Dd
4. Program the directly-addressable register values as shown in Table 36.
Table 36. Configure LNA Gain Step Parameters
Line Number Command Addr/Data Comment
1 SPIWrite 145,0F //Set maximum mixer gain index (always 0x0F)
2 SPIWrite 148,0E //Maximum measurement time
3 SPIWrite 147,3F //Maximum settling time
4 SPIWrite 158,0D //Default RSSI measurement mode
5 SPIWrite 150,0E //Maximum RSSI measurement time
6 SPIWrite 15D,xx //Maximum LNA Gain (from Table 35)
Rev. A

Analog Devices AD9361 Specifications

General

Brand	Analog Devices
Model	AD9361
Category	Motherboard
Language	English