ST TDA7512F User Manual
FM car-radio tuner IC with intelligent selectivity system (ISS)
Features
FM part
■ RF AGC generation by RF and IF detection
■ I/Q mixer for 1
rejection
■ 2 programmable IF-gain stages
■ Mixer for 2
■ Internal 450 kHz bandpass filter with three
bandwidths controlled by ISS
■ Fully integrated FM-demodulator with noise
cancellation
Additional features
■ VCO for world tuning range
■ High performance fast PLL for RDS-system
■ IF counter with search stop signal
■ Quality detector for level, deviation, adjacent
channel and multipath
■ Quality detection informations as analog
signals external available
■ ISS (intelligent selectivity system) for
cancellation of adjacent channel and noise
influences
Table 1. Device summary
st
FM IF 10.7 MHz with image
nd
IF 450 kHz
TDA7512F
LQFP64
■ Adjacent channel mute
■ Fully electronic alignment
■ All functions I
Description
The TDA7512F is a high performance tuner circuit
for FM car-radio. It contains mixer, IF amplifier,
demodulator, quality detection, ISS filter and PLL
synthesizer with IF counter on a single chip. Use
of BiCMOS technology allows the implementation
of several tuning functions and a minimum of
external components.
2
C bus controlled
Order code Package Packing
E-TDA7512F LQFP64 Tray
E-TDA7512FTR LQFP64 Tape and reel
June 2009 Doc ID 12668 Rev 2 1/45
www.st.com
1
Contents TDA7512F
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Mixer 1, AGC and 1.IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Mixer 2, limiter and demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Quality detection and ISS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.1 Fieldstrength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.2 Adjacent channel detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.3 Multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.4 450 kHz IF narrow bandpass filter (ISS filter) . . . . . . . . . . . . . . . . . . . . 18
4.3.5 Deviation detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.6 ISS switch logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 Soft Mute control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 PLL and IF counter section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5.1 PLL frequency synthesizer block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5.2 Frequency generation for phase comparison . . . . . . . . . . . . . . . . . . . . 19
4.5.3 Three state phase comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5.4 Charge pump current generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5.5 Inlock detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.6 Low noise CMOS op-amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.7 IF counter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.8 Sampling timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.9 Intermediate frequency main counter . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.10 Adjustment of the measurement sequence time . . . . . . . . . . . . . . . . . . 21
4.5.11 Adjust of the frequency value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6 I2C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.1 Data transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2/45 Doc ID 12668 Rev 2
TDA7512F Contents
4.6.2 Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.3 Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.5 Data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.6.6 Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.6.7 Write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.6.8 Read operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Software specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1 Address organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2 Control register function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Appendix A Block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Appendix B Application notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Doc ID 12668 Rev 2 3/45
List of tables TDA7512F
List of tables
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 6. Address organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 7. Control register function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 8. Subaddress. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 9. Addr 0 charge pump control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 10. Addr 1 PLL counter 1 (LSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 11. Addr 2 PLL counter 2 (MSB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 12. Addr 3,4 TV1,2 (offset refered to tuning voltage PIN 28) . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 13. Addr 5 IF counter control 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 14. Addr 6 IF Counter Control 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 15. Addr 7 not valid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 16. Addr 8 quality ISS filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 17. Addr 9 quality detection adjacent channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 18. Addr 10 quality detection multipath. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 19. Addr 11 quality deviation detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 20. Addr 12 soft mute control 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 21. Addr 13 soft mute control 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 22. Addr 14 VCODIV/PLLREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 23. Addr 15 FM AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 24. Addr 16 not valid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 25. Addr 17 FM demodulator fine adjust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 26. Addr 18 s-meter slider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 27. Addr 19 IF GAIN/XTAL adjust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 28. Addr 20 tank adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 29. Addr 21 I/Q mixer 1 adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 30. Addr 22 test control 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 31. Addr 23 test control 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 32. Addr 24 Test control 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 33. Addr 25 test control 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 34. Block diagram quality detection principle (without overdeviation correction) . . . . . . . . . . . 41
Table 35. Input signals modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 36. Part list (application- and measurment circuit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 37. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4/45 Doc ID 12668 Rev 2
TDA7512F List of figures
List of figures
Figure 1. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 4. LQFP64 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 5. Block diagram I/Q mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 6. Block diagram VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 7. Block diagram keying AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 8. Block diagram ISS function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 9. Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Doc ID 12668 Rev 2 5/45
Block diagram TDA7512F
1 Block diagram
Figure 1. Block Diagram
6/45 Doc ID 12668 Rev 2
TDA7512F Pin description
2 Pin description
Figure 2. Pin connection (top view)
Table 2. Pin description
Pin # Pin name Function
1 nu not used - to be left open
2 nu not used - to be left open
3 nu not used - to be left open
4 nu not used - to be left open
5 nu not used - to be left open
6 PINDR PIN Diode Driver Output
7 MIX1IN1 Input1 Mixer1
8 GNDRF RF Ground
9 MIX1IN2 Input2 Mixer1
10 AGCTC AGC Time Constant
11 TV1 Tuning Voltage Preselection1
12 TV2 Tuning Voltage Preselection2
13 ADJCH Ident. Adjacent Channel Output
14 FSU Unweighted Fieldstrength Output
15 ISSTC Time Constant for ISS Filter Switch
Doc ID 12668 Rev 2 7/45
Pin description TDA7512F
Table 2. Pin description (continued)
Pin # Pin name Function
16 VCCVCO VCO Supply
17 GNDVCO VCO Ground
18 VCOB VCO Input Base
19 VCOE VCO Output Emitter
20 DEVTC Deviation Detector Time Constant
21 XTALG Xtal Oscillator to MOS Gate
22 XTALD Xtal Oscillator to MOS Drain
23 GNDVCC3 VCC3 Ground
24 SSTOP Search Stop Output
2
25 SDA I
26 SCL I
27 VCC3 Supply Tuning Voltage
28 LPOUT Op Amp Output to PLL Loop Filters
29 VREF2 Voltage Reference for PLL Op Amp
30 nu not used - to be left open
C-Bus Data
2
C-Bus Clock
31 LPF Op Amp Input to PLL Loop Filter
32 LPHC High Current PLL Loop Filter Input
33 GNDVCC1 Digital Ground
34 MP Ident. Multipath Output
35 FSW Weighted Fieldstrength Output
36 VCC1 Digital Supply
37 MPX MPX Output
38 nu not used - to be left open
39 nu not used - to be left open
40 nu not used - to be left open
41 IICADDR Hardwired IIC-Address PIN
42 MUTETC Softmute Time Constant
43 nu not used - to be left open
44 REFDEMC Demodulator Reference
45 MIX2IN2 MIX2 Input1
46 MIX2IN1 MIX2 Input2
47 GNDDEM Ground Demodulator
48 VREF1 Reference 5V
49 GNDVCC2 Analog Ground
50 IF1AMP2OUT IF1 Amplifier2 Output
8/45 Doc ID 12668 Rev 2
TDA7512F Pin description
Table 2. Pin description (continued)
Pin # Pin name Function
51 VCC2 Analog Supply
52 IF1AMP2IN IF1 Amplifier2 Input
53 IF1REF IF1 Amplifier Reference
54 IF1AMP1OUT IF1 Amplifier1 Output
55 nc not used - has to be connected versus VCC2
56 nc not used - has to be connected versus VCC2
57 IF1AMP1IN IF1 Amplifier1 Input
58 ISSSTATUS ISS Filter Status
59 GNDIF1 IF1 Ground
60 IFAGCIN IF AGC Input
61 VCCIF1 IF1 Supply
62 nu not used - to be left open
63 MIX1OUT2 MIX Tank 10.7MHz
64 MIX1OUT1 MIX Tank 10.7MHz
Doc ID 12668 Rev 2 9/45
Electrical specifications TDA7512F
3 Electrical specifications
3.1 Thermal data
Table 3. Thermal data
Symbol Parameter Value Unit
R
th(j-amb)
Thermal resistance junction-to-ambient 68 max. °C/W
3.2 Absolute maximum ratings
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
V
T
amb
T
Supply voltage 10.5 V
S
Ambient temperature -40 to 85 °C
Storage temperature -55 to +150 °C
stg
3.3 Electrical characteristics
T
= +25 °C, V
amb
dev. = 40 kHz, f
circuit, unless otherwise specified.
Table 5. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
Supply
CC1
= 1 kHz, f
MOD
= V
CC2
= V
= V
CC3
= 10.7 MHz, f
IF1
CCVCO
= V
CCMIX1
= 450 kHz, f
IF2
= V
= 8.5 V, fRF = 98 MHz,
CCIF1
= 10.25 MHz, in application
Xtal
V
CC1
V
CC2
V
CC3
V
CCVCO
V
CCMIX1
V
CCIF1
I
CC1
I
CC2
I
CC3
I
CCVCO
I
CCMIX1
I
CCIF1
Digital supply voltage - 7.5 8.5 10 V
Analog supply voltage - 7.5 8.5 10 V
Analog tuning voltage - 7.5 8.5 10 V
VCO supply voltage - 7.5 8.5 10 V
MIX1 supply voltage - 7.5 8.5 10 V
IF1 supply voltage - 7.5 8.5 10 V
Supply current - - 7.5 - mA
Supply current VCO:3 - 70 - mA
Supply current - - 2 - mA
Supply current - - 9 - mA
Supply current - - 8 - mA
Supply current - - 6 - mA
10/45 Doc ID 12668 Rev 2
TDA7512F Electrical specifications
Table 5. Electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Reference voltages
V
V
REF1
REF2
Internal reference voltage I
Internal reference voltage I
Wide band RF AGC
V
7-9
V
7-9
Lower threshold start V10 = 2.5 V - 85 - dBµV
Upper threshold start V10 = 2.5 V - 96 - dBµV
Narrow band IF & keying AGC
V
60
V
60
V
60
V
35
Lower threshold start KAGC = off, V
Upper threshold start KAGC = off, V
Lower threshold start with
KAGC
Start point KAGC
D Control range KAGC
R
IN
C
IN
Input resistance - - 10 - kΩ
Input capacitance - - 2.5 - pF
AGC time constant output
V
10
V
10
I
10
I
10
Max. AGC output voltage V
Min. AGC output voltage V
Min. AGC charge current V
Max. AGC discharge
current
= 0 mA - 5 - V
REF1
= 0 mA - 2.5 - V
REF2
= 0 mV
7-9
= 0 mV
7-9
KAGC = max, V
Δf
= 300 kHz
IF
KAGC = max, V
Δf
= 300 kHz
IF
generate FSW level at V
f
IF1
ΔV
= +0.4 V - 16 - dB
35
= 0 mV
7-9
= 50 mV
7-9
= 0 mV
7-9
= 50 mV
V
7-9
7-9
7-9
RMS
RMS
,; V10 = 2.5 V - -12.5 - µA
RMS
,; V10 = 2.5 V - 1.25 - mA
RMS
= 0 mV
= 0 mV
RMS
RMS
RMS,
RMS,
35
- 86 - dBµV
- 98 - dBµV
- 98 - dBµV
-3.6- V
V
-
REF1
+V
-0.5V
BE
V
AGC pin diode driver output
I
6
I
6
AGC OUT, current min. V
AGC OUT, current max. V
= 0 mV
7-9
= 50 mV
7-9
, V6 = 2.5 V - 50 - µA
RMS
, V6 = 2.5 V - -20 - mA
RMS
I/Q mixer 1 (10.7MHz)
R
R
C
V
g
IN
IN
OUT
7,9
m
Input resistance differential - 10 - kΩ
Input capacitance differential - 4 - pF
Output resistance differential 100 - kΩ
Input dc bias - - 3.2 - V
Conversion
transconductance
--17-mS
F Noise figure 400 Ω generator resistance - 3 - dB
Doc ID 12668 Rev 2 11/45
Electrical specifications TDA7512F
Table 5. Electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
CP
1dB
IIP3 3
1dB compression point referred to diff. mixer input - 100 - dBµV
rd
order intermodulation - - 122 - dBµV
IQG I/Q gain adjust G -1 - +1 %
IQP I/Q phase adjust PH -7 - +8 DEG
IRR Image rejection ratio ratio wanted/image 30 40 - dB
IRR Image rejection ratio with gain and phase adjust 40 46 - dB
IF1 Amplifier1,2 (10.7 MHz)
G1
min
G1
max
G2
min
G2
max
R
IN
R
OUT
CP
1dB
IIP3 3rd order Intermodulation referred to 330 Ω
Min. gain IFG, referred to 330 Ω -9-dB
Max. gain IFG, referred to 330 Ω -15-dB
Min. gain IFG, referred to 330 Ω -9-dB
Max. gain IFG, referred to 330 Ω -11-dB
Input resistance - - 330 - Ω
Output resistance - - 330 - Ω
1dB compression point referred to 330 Ω input - 105 - dBµV
input - 126 - dBµV
Mixer 2 (450 kHz)
R
IN
V
46
V
48
Input impedance - - 330 - W
Max. input voltage - - 900 - mV
Limiting sensitivity S/N = 20dB - 25 - µV
G Mixer gain - - 18 - dB
RMS
Limiter 1 (450 kHz)
G
Limiter
Gain - - 80 - dB
Demodulator, audio output
THD Total harmonic distortion Dev.= 75 kHz, V
MPX output signal Dev.= 75 kHz - 500 - mV
Output resistance - - 50 - Ω
DC offset fine adjust DEM, MENA = 1 - 8.5 - mV
min
DC offset fine adjust DEM, MENA = 1 - 264 - mV
|
|
V
R
ΔV|
ΔV|
MPX
OUT
max
S/N Signal to noise Dev.= 40 kHz,V
= 10 mV
46
= 10 mV
46
Quality detection
S-meter, unweighted fieldstrength
V
46
V
14
Min. input voltage MIX2 - - 10 - µV
Fieldstrength output V46 = 0 V
RMS
12/45 Doc ID 12668 Rev 2
RMS
RMS
--0.1%
RMS
-76-dB
-0.1- V
TDA7512F Electrical specifications
Table 5. Electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
R
V
ΔV
ΔV
ΔV
14
OUT
Fieldstrength output V46 = 1 V
voltage per decade SMSL = 0 - 1 - V
14
voltage per decade SMSL = 1 - 1.5 - V
14
S-meter offset SL, SMSL=1 -15 15 dB
14
RMS
-4.9- V
Output resistance - - 200 - W
TK Temp coeff. - - 0 - ppm/K
S-meter, weighted fieldstrength
R
V
V
OUT
35
35
Fieldstrength output V46 = 0 V
Fieldstrength output V46 = 1 V
RMS
RMS
Output resistance - - 12 - kΩ
-2.5- V
-4.9- V
Adjacent channel gain
G
min
G
max
Gain minimum ACG=0 - 32 - dB
Gain maximum ACG=1 - 38 - dB
Adjacent channel filter
f
HP
f
BP
f
-20dB
-3dB frequency highpass ACF=0 - 100 - kHz
Centre frequency ACF=1 - 100 - kHz
Attenuation 20dB - - 70 - kHz
Adjacent channel output
R
V
V
OUT
13
13
Output voltage low - - 0.1 - V
Output voltage high - - 4.9 - V
Output resistance - - 4 - kΩ
Multipath channel gain
G
min
G
max
Gain minimum MPG=0 - 12 - dB
Gain maximum MPG=1 - 23 - dB
Multipath bandpass filter
f
Lower
f
Upper
Centre frequency low MPF=0 - 19 - kHz
Centre frequency up MPF=1 - 31 - kHz
Q Quality factor - 5 10 -
Multipath output
R
V
V
OUT
34
34
Output voltage low - - 0.1 - V
Output voltage high - - 4.9 - V
Output resistance - - 2.5 - kΩ
Doc ID 12668 Rev 2 13/45
Electrical specifications TDA7512F
Table 5. Electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
ISS (intelligent selectivity system)
Filter 450 kHz
f
centre
Centre frequency f
REF_intern
= 450 kHz - 450 - kHz
BW 3dB Bandwidth, -3dB ISS80 = 1 - 80 - kHz
BW 20dB Bandwidth, -20dB ISS80 = 1 - 150 - kHz
BW 3dB Bandwidth, -3dB ISS80 = 0 - 120 - kHz
BW 20dB Bandwidth, -20dB ISS80 = 0 - 250 - kHz
BW 3dB Bandwidth weather band ISS30 = 1 - 30 - kHz
BW 20dB -20dB weather band ISS30 = 1 - 80 - kHz
Adjacent channel ISS filter threshold
V
V
V
V
NTH
NTH
WTH
WTH
Internal low threshold ACNTH - 0 - V
Internal high threshold ACNTH - 0.3 - V
Internal low threshold ACWTH - 0.25 - V
Internal high threshold ACWTH - 0.95 - V
Multipath threshold
V
THMP
V
THMP
Internal low threshold MPTH - 0.50 - V
Internal high threshold MPTH - 1.25 - V
ISS filter time constant
I
15
I
15
I
15
I
15
I
15
I
15
V
15
V
15
Charge current low mid TISS, ISSCTL = 1 - -74 - µA
Charge current high mid TISS, ISSCTL = 1 - -60 - µA
Charge current low narrow TISS, ISSCTL = 1 - -124 - µA
Charge current high narrow TISS, ISSCTL = 1 - -110 - µA
Discharge current low TISS, ISSCTL = 0 - 1 - µA
Discharge current high TISS, ISSCTL = 0 - 15 - µA
Low voltage ISSCTL = 0 - 0.1 - V
High voltage ISSCTL = 1 - 4.9 - V
ISS filter switch threshold
V
15
V
15
V
15
V
15
I
20
I
20
Threshold ISS on ISSCTL = 0 - 3 - V
Threshold ISS off ISSCTL = 0 - 1 - V
Threshold ISS narrow on ISSCTL = 0 - 4 - V
Threshold ISS narrow off ISSCTL = 0 - 2 - V
Charge current low TDEV - -20 - µA
Charge current high TDEV - -34 - µA
14/45 Doc ID 12668 Rev 2
Loading...