Bandpass Filter Center Frequency (Hz)
Bandpass Filter Bandwidth (Hz)
5E+4 1.5E+5 2.5E+5 3.5E+5 4.5E+5 5.5E+5 6.5E+5
0
2E+4
4E+4
6E+4
8E+4
1E+5
1.2E+5
1.4E+5
1.6E+5
LNA_GAIN=0x0
BPF_Q_SEL=0x0
LOGAMP_DIS_FIRST=0x0; LOGAMP_DIS_LAST=0x0
-40qC, 3.3V
-40qC, 5.0V
25qC, 3.3V
25qC, 5.0V
125qC, 3.3V
125qC, 5.0V
BPF_FC_TRIM Register Value
BPF Center Frequency (Hz) (0x00)
BPFCenter Frequency (Hz) (0x2F)
0x10 0x0E 0x0C 0x0A 0x08 0x06 0x04 0x02 0x00
2E+4 5.5E+5
2.2E+4 5.75E+5
2.4E+4 6E+5
2.6E+4 6.25E+5
2.8E+4 6.5E+5
3E+4 6.75E+5
3.2E+4 7E+5
3.4E+4 7.25E+5
3.6E+4 7.5E+5
3.8E+4 7.75E+5
4E+4 8E+5
4.2E+4 8.25E+5
4.4E+4 8.5E+5
4.6E+4 8.75E+5
4.8E+4 9E+5
5E+4 9.25E+5
VDD=3.3V
Temp=25qC
LNA_GAIN=0x0; VOUT_SCALE_SEL=0x0
LOGAMP_DIS_FIRST=0x0; LOGAMP_DIS_LAST=0x0
BPF_HPF_FREQ Value
0x00
0x2F
Vin Frequency (Hz)
Vout (V)
3E+4 5E+4 7E+4 1E+5 2E+5 3E+5 5E+5 7E+57E+5
1.55
1.6
1.65
1.7
1.75
1.8
1.85
1.9
1.95
2
2.05
2.1
2.15
VDD:3.3V
Temp:25qC
LNA_GAIN=0x0; VOUT_SCALE_SEL=0x0
LOGAMP_DIS_FIRST=0x0; LOGAMP_DIS_LAST=0x0
BPF_HPF_FREQ
0x00
0x04
0x08
0x0C
0x10
0x14
0x18
0x1C
0x20
0x24
0x28
0x2C
0x2F
BPF_HPF_FREQ Register Value
Bandpass Filter Center Frequency (Hz)
0x00 0x06 0x0C 0x12 0x18 0x1E 0x24 0x2A 0x30
4E+44E+4
5E+4
7E+4
1E+5
2E+5
3E+5
4E+5
5E+5
6E+5
LNA_GAIN=0x0;
LOGAMP_DIS_FIRST=0x0; LOGAMP_DIS_LAST=0x0
-40qC
25qC
125qC
Vin
RMS
(V)
Log Conformance Error (dB)
1E-6 1E-5 1E-4 1E-3 1E-2 1E-1
-15
-12.5
-10
-7.5
-5
-2.5
0
2.5
5
7.5
10
1dB
LNA_GAIN=0x0
LOGAMP_DIS_FIRST=0x0; LOGAMP_DIS_LAST=0x1
-40.00qC, 40KHz
-40.00qC, 256KHz
-40.00qC, 500KHz
25.00qC, 40KHz
25.00qC, 256KHz
25.00qC, 500KHz
125.00qC, 40KHz
125.00qC, 256KHz
125.00qC, 500KHz
Vin
RMS
(V)
Log Conformance Error (dB)
1E-5 1E-4 1E-3 1E-2 1E-1
-15
-12.5
-10
-7.5
-5
-2.5
0
2.5
5
7.5
10
1dB
LNA_GAIN=0x0
LOGAMP_DIS_FIRST=0x1; LOGAMP_DIS_LAST=0x1
-40.00qC, 40KHz
-40.00qC, 256KHz
-40.00qC, 500KHz
25.00qC, 40KHz
25.00qC, 256KHz
25.00qC, 500KHz
125.00qC, 40KHz
125.00qC, 256KHz
125.00qC, 500KHz
9
TUSS4470
www.ti.com.cn
ZHCSKL2 –DECEMBER 2019
版权 © 2019, Texas Instruments Incorporated
Typical Characteristics (接接下下页页)
图图 7. Receive Signal Path Log Conformance Error With Last
Stage Disabled
图图 8. Receive Signal Path Log Conformance Error With First
and Last Stage Disabled
图图 9. Receive Signal Path Bandpass Filter Transfer Function
图图 10. Receive Signal Path Bandpass Filter frequency for
Various Register Settings
图图 11. Receive Signal Path Bandpass Filter Center
Frequency Trim
图图 12. Receive Signal Path Bandpass Filter Bandwidth for
Various Center Frequency Settings