U4240B

U4240B TEMIC | Alldatasheet

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Technical content

Features

IF output for stereo demodulator and stop signal generation AF preamplifier with simple filtering Controlled RF preamplifier Double balanced mixer Separate oscillator with amplitude control IF amplifier with gain control Balanced full-wave detector Audio preamplifier Internal AGC voltage Amplifier for field-strength indication Electronic standby ON/ OFF switch Block Diagram preamplifier Balanced Standby IF amplifier full-wave amplifier amplifier Controlled AM-antenna tank AM-oscillator tank IF BPF mixer switch Controlled Balanced detector Control voltage AF RF Internal supply voltage Controlled oscillator AM-IF output driver Indicator 5 (6) 6 (7) 7 (8) 8 (9) 9 (11) 4 (5) 3 (4) 2 (2) 1 (1) 18 (20) 17 (19) 16 (17) 14 (15) 13 (14) 12 (13) 11 (12) 10 (11) 15 (16) GND VS 5 k 5 k 7 k 7 k 3.5 k 12 k 170 150 93 7715 e ( ) SSO 20 Figure 1.

Rev. A1: 12.07.1995 2 (8) Pin Description U4240B 93 7721 e DIP 18 DIP 20 Function Mixer output Standby switch IF amplifier input VREF Low pass filtering AF output 7, 8 8, 9 AGC time constant Low pass filtered AF output IF output Field strength indicator Oscillator output Oscillator tank reference output Oscillator tank input VS 16, 17 17, 19 RF input GND 3, 18 Not connected Controlled RF Preamplifier, Pin 7 The RF preamplifier is built up differentially in order to achieve the best possible large signal handling capability. Special care was taken to reduce the input stage noise. Balanced Mixer, Pin 1 The mixer is a double balanced type with a single ended output. Controlled Oscillator, Pins 13 and 14 The oscillator employs temperature compensation, simple varicap and coil connection. The amplitude of the oscillator is controlled to low values, in order to support AM varactor diodes. The LO-buffer supports the U428xBM PLL-family. Controlled IF Amplifier, Pin 3 The IF amplifier consists of two controlled gain cells coupled by capacitive means. Internal band pass filtering reduces higher order products and THD. AM-IF Output, Pin 10 For AM stereo application and for stop signal generation by IF counting Pin 10 provides a non limited but ampli- tude controlled IF signal of about 280 mV. Balanced Full-Wave Detector, Pin 5 The detector consists of a Gilbert cell that multiplies the limited carrier signal with the IF output signal and there- fore employs a full wave rectification. Second or higher order products at the output are internally low pass filtered. AF Amplifier, Pin 6 The AF amplifier has two different outputs. They provide different output resistances for simplifying applications. For a high end application Pin 6 provides a 3.5 k output resistor to support a second order low pass filter. Pin 9 provides additional 12 k for a simple first order low pass filter. AGC, Pin 8 The AGC block generates the AGC voltage that is to be smoothed at Pin 8. The capacitor at Pin 8 defines the time constant. The voltage at Pin 8 is buffered to control the internal gain stages with different delay. The control volt- age is available at Pin 11 (field strength indication). Standby Switch, Pin 2 The whole circuit can be powered down by the standby switch. This mode can be achieved by a dc voltage higher than 3.5 V at Pin 2.

Rev. A1: 12.07.1995 3 (8) Absolute Maximum Ratings Reference point Pin 18, unless otherwise specified Parameters Symbol Value Unit Supply voltage Pin 15 VS V Input voltage Pin 2 Pins 16 and 17 Pins 16 and 17 IV16–17I V16, V17 VS V Input current Pins 16 and 17 I16, I17 200 mA Ambient temperature range Tamb –30 to +85 Storage temperature range Tstg –55 to +150 Junction temperature Tj 125 Electrostatic handling (MIL Standard 883 C) except Pin 10 ±VESD 2000 V Thermal Resistance Parameters Symbol Value Unit Junction ambient RthJA 100 K/W

Electrical Characteristics

VS = 8.5 V, reference point Pin 18, fiRF = 1 MHz, RG = 50 , fmod = 0.4 kHz, m = 30%, fIF = 460kHz, Tamb = 25°C, unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Supply Pin 15 Supply voltage VS 7.5 V Supply current without load: IL = 0 (Pin 13) IS mA RF preamplifier DC input voltages Pins 16 and 17 Vi VS/2 V Input impedance ViRF < 300 V, Pins 16, 17 ViRF > 10 mV Pins 16, 17 Ri Ci Ri Ci 5.5 k pF k pF Maximum RF input voltage Pins 16 and 17 Vi 2.5 Vpp Mixer output Pin 1 Output impedance Ro Co 500 6.0 k pF Conversion conductance IoIF/ViRF sM 6.5 mA/V Oscillator Frequency range Pin 14 fosc 0.6 MHz Oscillator circuit impedance range Pin 14 ZLosc 0.5 200 k Controlled oscillator amplitude Pin 14 Vosc 130 160 mV DC output voltage IL = 0 Pin 13 Vo

6 VBE

(4.2V) V Output load current range Pin 13 –Il mA

Rev. A1: 12.07.1995 4 (8) Unit Max. Typ. Min. Symbol Test Conditions / Pins Parameters Oscillator frequency output, RL10 = 2.2 k Pin 12 Output voltage VO 320 mVpp DC output voltage VO 0.9 V Output resistance RO 170 Output current IO mAp IF amplifier and demodulator DC input voltages Pins 3 and 4 Vi V Input impedance Pins 3 Ri Ci 2.4 3.9 k pF Maximum IF input voltage m = 80%, d = 3%, Pin 3 Vi mV IF output voltage, without load Vi = 10 mV (Pin 3/4) Pin 10 Vo 230 280 340 mV IF output resistance Pin 10 Ro Control range VoAF = 6 dB Vi dB Audio output voltage, without load Vi = 1 mV (Pin 3/4) Pins 6 and 9 Vo 310 mV Audio output resistance Pin 6 Pin 9 Ro 2.9 3.5 4.2 k Field strength indication Pin 11 DC indicator voltages RL11 = 2.7 k, Vi = 0 RL11 = 2.7 k, Vi = 500 mV Vo 2.5 100 2.8 3.1 mV V Output current capability Io 2.0 mA Output resistance –Io = 0.5 mA Ro 150 Reverse voltage at the output AM switch OFF, Io 1 A Vo V Standby switch Pin 2 Switching voltage VI

4 VBE

(2.75) V Required control voltage AM-ON AM-OFF VI VI1) 3.5 V Input current AM-ON, V2 = 0 AM-OFF, V2 = 12 V 1) –II II 200 A or open input

Rev. A1: 12.07.1995 5 (8) Operating Conditions VS = 8.5 V, fiRF = 1 MHz, fmod = 0.4 kHz, m = 30%, Tamb = 25°C, reference point Pin 18 (fig. 2) unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit RF input voltage (S+N)/N = 6 dB = 26 dB = 46 dB ViRF 1.5 150 V RF input for AGC operation ViRF V Control range with ref. to ViRF = 500 mV VoAF = 6 dB ViRF dB Maximum RF input voltage d = 3%, m = 80% d = 3%, m = 30% d = 10%, m = 30% ViRF 0.5 0.7 0.9 V Audio output voltage Vi = 1 mV Pin 6 Vi = 4 V, m = 0.8 VoAF 310 mV RF input voltage VoAF = 60 mV ViRF 5.5 V Total distortion of audio output voltage m = 80%, Vi = 1 mV m = 30%, Vi = 500 mV d 0.7 0.9 Signal plus noise to noise ratio of audio output voltage Vi = 100 mV (S+N)/N dB IF bandwidth (–3 dB) BIF 4.6 kHz IF selectivity f = 9 kHz f = 36 kHz SIF dB Test Circuit L 95H 33 pF Band switch diodes 2...22 pF RL12 2.2 k 10 nF 0.1F RL11 2.7 k 1 mA fosc voIF 507 pF 12...440 pF VS1 V 0.1 F viRF 22 nF 3.9 nF L 2.2 k 56 pF IF Filter SFZ 460 A V AM 10 nF 3.3 nF voAF 2.2F 3.3 nF voAF 22F 0.1F U4240B 93 7617 e 0.22F 47F RG 12 k Figure 2.

Rev. A1: 12.07.1995 6 (8) 100 dBV viRF S + N N –100 –50 dBV VoAF 93 7736 e 100 dBV viRF V Vo (pin 11) 93 7737 e 100 dBV dB d S + N N S + N N d viRF 93 7735 e

Rev. A1: 12.07.1995 7 (8) Ordering and Package Information Extended type number Package U4240B-A 18 pin DIP plastic U4240B-AFS SSO 20 plastic Dimensions in mm Package: DIP 18 94 8877 Package: SSO 20 95 9943

Rev. A1: 12.07.1995 8 (8) 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