U4254BM-AFPG3

U4254BM TEMIC | Alldatasheet

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Technical content

Features

/C0068High dynamic range for AM and FM /C0068Integrated AGC for FM /C0068High intercept point 3rd order for FM /C0068FM amplifier adjustable to various cable impedance /C0068High intercept point 2nd order for AM /C0068Low noise output voltage /C0068Low power consumption Block Diagram FM AGC FMIN AGC VS AMIN AMOUT VREF1 FMOUT FMGAIN GND1 IAGC AGCADJ GND2 VREF2 VREF AMOUT111 AM 13932 Figure 1. Block diagram

Figure 2. Pinning

1 FMIN FM input

2 GND1 Ground for FM part

3 FMGAIN FM gain adjustment

4 AGC AGC output

5 VREF2 Reference voltage 2 output

6 NC Not connected

7 GND2 Ground for AM part

8 AMIN AM input

9 NC Not connected

10 AMOUT AM output

11 AMOUT1 AM output

12 VREF1 Reference voltage 1 output

13 AGCADJ Adjustment FM wide-band

14 VS Supply voltage

15 FMOUT FM output

16 NC Not connected

Rev. A1, 08-Jul-97 5 (12) Functional Description The U4254BM is an integrated AM/FM antenna imped- ance matching circuit. It compensates cable losses between the antenna (for example windscreen, roof or bumper antennas) and the car radio which is usually placed far away from the antenna. The FM amplifier provides excellent noise performance. External components are used to adjust the gain and the input-output matching impedance. Therefore it is possible to adjust the amplifier to various cable impedances (usually 50, 75 or 150 /C0087). To protect the amplifier against input overload an A utomatic G ain C ontrol (AGC) is included on the chip. The AGC observes the AC voltage at the FM amplifier output, rectifies this signal, and delivers DC current to dampen the input antenna signal via an external PIN diode. The threshold for the AGC is adjustable. Simple and temperature compensated biasing is possible due to the integrated voltage reference V Ref2. The AM part consists of a buffer amplifier. The voltage gain of this stage is approximately one. The input resistance is 470 k/C0087, the input capacitance less than 10 pF. The output resistance is 125 /C0087. An excellent dynamic range is achieved due to the complementary CMOS source follower stage. Absolute Maximum Ratings Reference point is ground (Pins 2 and 7) Parameters Symbol Value Unit Supply voltage V S 8.8 V Power dissipation, Ptot at Tamb = 85°C Ptot 460 mW Junction temperature Tj 150 °C Ambient temperature Tamb –40 to +85 °C Storage temperature Tstg –50 to +150 °C Electrostatic handling (HBM) /C0034V ESD 2000 V Thermal Resistance Parameters Symbol Value Unit Junction ambient R thJA 140 K/W

Rev. A1, 01-Jul-97 6 (12)

Electrical Characteristics

V S = 8 V , Tamb = 25°C, unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Supply voltage ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Pin 14 ÁÁÁÁÁ ÁÁÁÁÁ Vs ÁÁÁ ÁÁÁ 7.2 ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ 8.8 ÁÁÁÁ ÁÁÁÁ V ÁÁÁÁÁÁÁÁÁÁ Supply currents ÁÁÁÁÁÁÁÁÁ Pin 14 ÁÁÁÁÁ Is ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ mA ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ Reference voltage 1 output (I12 = 0) ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Pin 12 ÁÁÁÁÁ Á ÁÁÁ Á ÁÁÁÁÁ V Ref1 ÁÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁ 5.5 ÁÁÁ Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁ V ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ Reference voltage 2 output (I5 = 0) ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Pin 5 ÁÁÁÁÁ Á ÁÁÁ Á ÁÁÁÁÁ V Ref2 ÁÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁ 2.6 ÁÁÁ Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁ V ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Temperature dependence of VREF2 ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Pin 5 ÁÁÁÁÁ ÁÁÁÁÁ V Ref2//C0068T ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ mV/K ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ AM amplifier ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Input resistance ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Pin 8 ÁÁÁÁÁ ÁÁÁÁÁ R AMIN ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ 470 ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ k/C0087 ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Input capacitance ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Pin 8 ÁÁÁÁÁ ÁÁÁÁÁ C AMIN ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ pF ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Output resistance ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Pin 10 ÁÁÁÁÁ ÁÁÁÁÁ R OUT ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ 125 ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ /C0087 ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ V oltage gain ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Pin 10 / Pin 8 ÁÁÁÁÁ ÁÁÁÁÁ a ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ 0.85 ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ Output noise voltage (rms value) ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Pin 10 S1 switched to 2; B = 6 kHz 150 kHz to 300 kHz 500 kHz to 6.5 kHz ÁÁÁÁÁ Á ÁÁÁ Á Á ÁÁÁ Á ÁÁÁÁÁ V N1 V N2 ÁÁÁ Á ÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ ÁÁÁ Á Á Á Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ dB µV dB µV ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ 2nd harmonic ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Pin 10 S2 switched to 1 f AMIN = 500 kHz, Output voltage = 110 dBµV ÁÁÁÁÁ Á ÁÁÁ Á Á ÁÁÁ Á ÁÁÁÁÁ ÁÁÁ Á ÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ –65 ÁÁÁ Á Á Á Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ dBc ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ FM amplifier ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Supply current limit ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ IAGC , IAGCADJ = 0 A, Pin 15 ÁÁÁÁÁ ÁÁÁÁÁ I15 ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ mA ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Input resistance ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ f = 100 MHz Pin 1 ÁÁÁÁÁ ÁÁÁÁÁ R FMIN ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ /C0087 ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Output resistance ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ f = 100 MHz Pin 15 ÁÁÁÁÁ ÁÁÁÁÁ R FMOUT ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ /C0087 ÁÁÁÁÁÁÁÁÁÁ Power gain ÁÁÁÁÁÁÁÁÁ f = 100 MHz Pin 15/ Pin 1 ÁÁÁÁÁ G ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ dB ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ Output noise voltage ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Pin 15 f = 100 MHz, B = 120 kHz ÁÁÁÁÁ Á ÁÁÁ Á ÁÁÁÁÁ V N ÁÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁ ÁÁÁ Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁ dB µV ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ 3rd order output intercept ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ f = 100 MHz Pin 15 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ 132 ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ dB µV ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ AGC ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ AGC input voltage threshold ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ f = 100 MHz Pin 15 S2 switched to 1; AGC threshold DC current is 10 µA at Pin 4 ÁÁÁÁÁ Á ÁÁÁ Á Á ÁÁÁ Á ÁÁÁÁÁ V th1 ÁÁÁ Á ÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ ÁÁÁ Á Á Á Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ dB µV ÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁ AGC input voltage threshold ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ f = 100 MHz Pin 15 S2 switched to 2; AGC threshold DC current is 10 µA at Pin 4 ÁÁÁÁÁ Á ÁÁÁ Á Á ÁÁÁ Á ÁÁÁÁÁ V th2 ÁÁÁ Á ÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ 106 ÁÁÁ Á Á Á Á Á Á ÁÁÁ ÁÁÁÁ Á ÁÁ Á Á ÁÁ Á ÁÁÁÁ dB µV ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ AGC output current ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ AGC active ÁÁÁÁÁ ÁÁÁÁÁ IAGC ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ 1.2 ÁÁÁÁ ÁÁÁÁ mA

Rev. A1, 08-Jul-97 7 (12) Test Circuit U4254BM 2.2/C0109F V S 150 /C0087 2.2 nF 2.2 nF 51 /C0087 22 /C0087 2.2 nF 2.2 /C0109H AMOUT 2.2 /C0109H 100 nF 2.2 nF FMOUT 2.2 nF 1 nF 15 pF AMIN V S 916 5 k/C0087 I15 I14 I13 FMIN 100 nF 13934 Figure 12.

Rev. A1, 01-Jul-97 8 (12) FM Intermodulation Distortion 90 95 100 105 MHz Input 90 95 100 105 MHz Output Gain = 5 dB AGC not active 90 95 100 105 MHz Input 90 95 100 105 MHz AGC active dB /C0109V dB /C0109V 108 dB/C0109V 100 dB/C0109V 50 dB/C0109V 58 dB/C0109V dB /C0109V dB /C0109V 103 dB/C0109V 118 dB/C0109V Output 12400 Figure 13.

Rev. A1, 01-Jul-97 10 (12) Application Circuit FM AGC AM FMIN AGC AMIN AMOUT1 VREF1 FMOUT FMGAIN FMGND I AGCADJ AMGND VREF2 V ANTENNA AM FM Protection circuit OutputVS PIN V = 8.2 V 13937 1 k BC558

2.2 H/C0109R

2.2 nF 100 nF 200 nF BA679 2.2 nF 39 pF

2.2 H/C0109

2.2 nF 2.2 nF /C0087510

1 F/C0109

S 2.2 nF Vs /C0087 V 1 nF Ref AGC R 2 R and R depend on used FM cable impedance FM cable impedance R ( )1 /C0087 R ( )2 /C0087 100 125 150 150 270 390 470 620 160 /C0087 100 nF AMOUT Figure 16.

Rev. A1, 08-Jul-97 11 (12)

Package Information

Rev. A1, 01-Jul-97 12 (12) Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423