Datasheet

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VCA8500
SBOS390A – JANUARY 2008 – REVISED MARCH 2008
Table 6. Byte 4 — Third Data Byte
BIT # NAME DESCRIPTION
D24 (LSB) DB5:1 Channel 5, LSB of matrix control
D25 DB5:2 Channel 5, matrix control
D26 DB5:3 Channel 5, matrix control
D27 DB5:4 Channel 5, MSB of matrix control
D28 DB6:1 Channel 6; LSB of matrix control
D29 DB6:2 Channel 6, matrix control
D30 DB6:3 Channel 6, matrix control
D31 (MSB) DB6:4 Channel 6, MSB of matrix control
Table 7. Byte 5 — Fourth Data Byte
BIT # NAME DESCRIPTION
D32 (LSB) DB7:1 Channel 7, LSB of matrix control
D33 DB7:2 Channel 7, matrix control
D34 DB7:3 Channel 7, matrix control
D35 DB7:4 Channel 7, MSB of matrix control
D36 DB8:1 Channel 8; LSB of matrix control
D37 DB8:2 Channel 8, matrix control
D38 DB8:3 Channel 8, matrix control
D39 (MSB) DB8:4 Channel 8, MSB of matrix control
Table 8. Clamp Level and LPF Bandwidth Setting
NAME SETTING FUNCTION
D3 = 0 Bandwidth set to 15MHz (default)
BW
D3 = 1 Bandwidth set to 10MHz
D4 = 0 Clamps the output signal at 1.7V
PP
on each PGA output channel (default)
CL
D4 = 1 Clamp transparent (disabled)
Table 9. PGA Gain Setting
PG1 PG0 FUNCTION
0 0 Set PGA gain to 20dB (default)
0 1 Set PGA gain to 25dB
1 0 Set PGA gain to 27dB
1 1 Set PGA gain to 30dB
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