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AFE5809ZCF Datasheet(PDF) 39 Page - Texas Instruments

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Part # AFE5809ZCF
Description  Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, and Digital I/Q Demodulator, 0.75 nV/rtHz, 14, 12-Bit, 65 MSPS, 158 mW/CH
PDF  90 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE5809ZCF Datasheet(HTML) 39 Page - Texas Instruments

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AFE5809
www.ti.com
SLOS738C – SEPTEMBER 2012 – REVISED JANUARY 2013
Table 5. Register 52[4:0] Description (continued)
52[4:0]/0x34[4:0]
FUNCTION
10000
Enables 4500
Ω feedback resistor
Programmable Gain for CW Summing Amplifier
Different gain can be configured for the CW summing amplifier through the register 54[4:0]. By enabling and
disabling the feedback resistors between the summing amplifier inputs and outputs, the gain is adjustable
accordingly to maximize the dynamic range of CW path. Table 6 describes the relationship between the summing
amplifier gain and 54[4:0] settings.
Table 6. Register 54[4:0] Description
54[4:0]/0x36[4:0]
FUNCTION
00000
No feedback resistor
00001
Enables 250
Ω feedback resistor
00010
Enables 250
Ω feedback resistor
00100
Enables 500
Ω feedback resistor
01000
Enables 1000
Ω feedback resistor
10000
Enables 2000
Ω feedback resistor
Table 7. Register 54[4:0] vs Summing Amplifier Gain
54[4:0]/0x36[4:0]
00000
00001
00010
00011
00100
00101
00110
00111
CW I/V Gain
N/A
0.50
0.50
0.25
1.00
0.33
0.33
0.20
54[4:0]/0x36[4:0]
01000
01001
01010
01011
01100
01101
01110
01111
CW I/V Gain
2.00
0.40
0.40
0.22
0.67
0.29
0.29
0.18
54[4:0]/0x36[4:0]
10000
10001
10010
10011
10100
10101
10110
10111
CW I/V Gain
4.00
0.44
0.44
0.24
0.80
0.31
0.31
0.19
54[4:0]/0x36[4:0]
11000
11001
11010
11011
11100
11101
11110
11111
CW I/V Gain
1.33
0.36
0.36
0.21
0.57
0.27
0.27
0.17
Copyright © 2012–2013, Texas Instruments Incorporated
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