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| VCA8500_0803 Datasheet, PDF (10/40 Pages) Texas Instruments – 8-Channel, Ultralow-Power, Variable Gain Amplifier with Low-Noise Pre-Amp | |||
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VCA8500
SBOS390A â JANUARY 2008 â REVISED MARCH 2008
BIT #
D24 (LSB)
D25
D26
D27
D28
D29
D30
D31 (MSB)
NAME
DB5:1
DB5:2
DB5:3
DB5:4
DB6:1
DB6:2
DB6:3
DB6:4
Table 6. Byte 4âThird Data Byte
DESCRIPTION
Channel 5, LSB of matrix control
Channel 5, matrix control
Channel 5, matrix control
Channel 5, MSB of matrix control
Channel 6; LSB of matrix control
Channel 6, matrix control
Channel 6, matrix control
Channel 6, MSB of matrix control
BIT #
D32 (LSB)
D33
D34
D35
D36
D37
D38
D39 (MSB)
NAME
DB7:1
DB7:2
DB7:3
DB7:4
DB8:1
DB8:2
DB8:3
DB8:4
Table 7. Byte 5âFourth Data Byte
DESCRIPTION
Channel 7, LSB of matrix control
Channel 7, matrix control
Channel 7, matrix control
Channel 7, MSB of matrix control
Channel 8; LSB of matrix control
Channel 8, matrix control
Channel 8, matrix control
Channel 8, MSB of matrix control
NAME
BW
CL
SETTING
D3 = 0
D3 = 1
D4 = 0
D4 = 1
Table 8. Clamp Level and LPF Bandwidth Setting
FUNCTION
Bandwidth set to 15MHz (default)
Bandwidth set to 10MHz
Clamps the output signal at 1.7VPP on each PGA output channel (default)
Clamp transparent (disabled)
Table 9. PGA Gain Setting
PG1
0
0
1
1
PG0
0
1
0
1
FUNCTION
Set PGA gain to 20dB (default)
Set PGA gain to 25dB
Set PGA gain to 27dB
Set PGA gain to 30dB
www.ti.com
10
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Product Folder Link(s): VCA8500
Copyright © 2008, Texas Instruments Incorporated
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