AZT71_1301 Datasheet, PDF (5/14 Pages) Arizona Microtek, Inc – Programmable Capacitive Tuning IC

Arizona Microtek, Inc.
AZT71
Programmable Capacitive Tuning IC
PROGRAMMING THE AZT71
CONTROL WORD
The capacitance in the AZT71 is controlled by an 11-bit shift register with the data input bit definitions shown in Table 5.
The control word data is inputted serially on the rising edge of the CLK signal with bit0 first and bit10 last.
Table 5 - AZT71 Control Word Definition
11-bit Control Word
bit10 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1
C_hi
C_mid
C_lo
MSB
LSB MSB
---
LSB MSB
---
---
---
LSB
bit0
Not Used
The control word mapping is a binary word for each of C_hi, C_mid and C_lo where higher number bits are more significant.
Figure 6 shows the capacitance value mapping for the AZT71. The detailed Nominal Capacitance Binary Mapping can be
located on the AZM website.
www.azmicrotek.com
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Figure 6 – AZT71 Capacitance Value Mapping
5
Jan 2013, Rev 1.3