u4090b-p ATMEL Corporation, u4090b-p Datasheet
u4090b-p
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u4090b-p Summary of contents
Page 1
... Speaker Phone Benefits • Savings of One Piezoelectric Transducer • Complete System Integration of Analog Signal Processing on One Chip • Very Few External Components • Fewer Components for EMI Protection Monolithic Integrated Feature Phone Circuit EMI Improved U4090B-P Rev. 4741C–CORD–11/05 ...
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... Description The microcontroller-controlled telephone circuit U4090B linear integrated circuit for use in feature phones, answering machines and fax machines. It contains the speech circuit, tone ringer interface with DC/DC converter, sidetone equivalent and ear protection rectifiers. The cir- cuit is line powered and contains all components necessary for amplification of signals and adaptation to the line ...
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... Figure 1-2. Detailed Block Diagram 4741C–CORD–11/05 U4090B-P 3 ...
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... GR 4 MIC2 40 5 MIC1 RECO1 39 6 RAC STIL IND VL STIS 8 37 GND 36 9 RECO2 SENSE 35 10 MUTR U4090B-P STO 33 12 SAO 32 IREF VMPS 13 VMP 31 AGA 14 SWOUT 30 15 TLDR COSC 16 29 TLDT VRING 28 INLDR 17 THA 27 18 INLDT RFDO 26 ATAFS ...
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... Attenuation of acoustical feedback suppression, maximum attenuation of AFS circuit is set by a resistor 26 ATAFS at this pin, without the resistor, AFS is switched off 27 INLDT Input of transmit level detector 28 INLDR Input of receive level detector 29 TLDT Time constant of transmit level detector 4741C–CORD–11/05 T sets the slope of the DC characteristic and also L U4090B-P is shorted ...
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... order to improve the supply during worst-case operating conditions, two PNP current sources - I BOPT parallel are unable to conduct current. A flowchart for the control of the current sources VMPS is achieved. U4090B-P 6 and V . The value of the equivalent inductance is given by: MPS B C ((R ...
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... BOPT < OFFS Y VSENSE - VMPS > 200 VMPS < 6.3V Y VSENSE - VB > 200 < 6.3V Y Charge CMPS Charge CB (IMPSOPT) (IBOPT) I MPSOPT < 6.3V MPS = - + V MP 3.3V 3.3V 7.0V N IMPSOPT = 0 IBOPT = 0 N Reduce IBOPT (IMPSOPT = 0) U4090B-P 470 µF 47 µF 220 µF 7 ...
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... LIDET V LON RFD RFDO The U4090B-P contains two identical series regulators which provide a supply voltage V 3.3V suitable for a microprocessor. In speech mode, both regulators are active because V and V B itor at V interruptions. Thus, long flash pulses can be bridged or an LCD display can be turned on for more than 2 seconds after going on hook ...
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... Selection of the active channel is made by comparison of the logarithmically compressed TX- and RX- envelope curve. The system configuration for group listening, which is realized in the U4090B-P, is illustrated in Figure 3-6 on page detectors are shown in a simplified way (operational amplifiers with two diodes). ...
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... Figure 3-4. Basic Voice Switch System Handset microphone Loudspeaker Figure 3-5. Integration of the Acoustic Feedback Suppression Circuit into the Speech Circuit Environment GT SAO GSA U4090B Att Log Att contr RX Att MICO TIN INLDT TLDT - VBG + AFS control Max AGA att. - VBG + SAI ...
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... AGAFS 0.67 dB/µA AT illustrates the principle relationship between speaker amplifier gain (GSA) . The actual value of attenuation (ATAFS TXA SAI AGA I AGAFS ATAFS I ATGSA ATAFS GSA R ATAFS ), however, can be determined the speaker amplifier gain is a U4090B-P AGA I GSA Figure 3-6. Receive 11 ...
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... Figure 3-7. Figure 3-8. 3.3 Line Detection (LIDET) The line current supervision is active under all operating conditions of the U4090B-P. In speech mode (PD = inactive), the line-current comparator uses the same thresholds as the comparator for switching off the entire speaker amplifier. The basic behavior is illustrated in page 13. Actual values of ILON/ILOFF vary slightly with the adjustment of the DC characteristics and the selection of the internal line impedance ...
Page 13
... Figure 3-10. Comparator Thresholds Depending on DC Mask and Line Impedance 3.5 Ringing Frequency Detector (RFD) The U4090B-P offers an output signal for the microcontroller, which is a digital representation of the double ringing frequency generated by a current comparator with hysteresis. The input voltage V and V RING as long as the supply voltage for the microprocessor VMP is above 2 ...
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... DC Characteristics DC voltage drop over circuit Transmission Amplifier mA Range of transmit gain Transmitting amplification Frequency response Gain change with current Gain deviation CMRR of microphone amplifier Input resistance of MIC amplifier Distortion at line Maximum output voltage U4090B-P 14 Symbol RING amb T ...
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... GEN – –2 –1.75 – 7 0.775 4 ni – –7.0 –6.0 RI U4090B-P Max. Unit –72 dBmp ms 42 –5 –0. ±0.5 dB ±0.5 dB ±0.5 dB 2.2 V rms dB V rms mA (peak) – ...
Page 16
... Gain change with frequency Attack time of anti-clipping Release time of anti-clipping DTMF Amplifier Test Conditions: IMP = 2 mA 0.3 mA, V Adjustment range of DTMF gain DTMF amplification Gain deviation Input resistance Distortion of DTMF signal U4090B mA, RDC = 130 25°C, RGSA = 560 amb = GND GND, V IMPSEL ...
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... ATAFS V 3.1 3 MPS V 1 17.5 RINGON V 11.0 HYST RING R 150 RINGSP 0 V RFDO 1.8 2.0 MPON V 30.8 RINGmax –20 I MUTE +10 V MUTE VMP – V MUTE 0.3V U4090B-P Max. Unit ±0 3.5 V 6.7 V 3 2.2 V 33.3 V –30 µA 0 ...
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... Input current Input voltage MUTX Input Input current Input voltage Line Detection Line current for LIDET active Line current for LIDET inactive Current threshold during power down U4090B mA, RDC = 130 25°C, RGSA = 560 amb = GND GND, V IMPSEL MUTX ...
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... U4090B-P Control Table 7-1. Logic Level Table 7-2. Logic Level Table 7-3. Logic Level 4741C–CORD–11/05 Selection of TX Mute and Line Impedance IMPSEL Line impedance = 600 0 TXA = off Line impedance = 600 TXA = off Line impedance = 900 ...
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... Explanation of Abbreviations RECATT = Receive attenuation STIS, STIL = Inputs of sidetone balancing amplifiers ES = External supply AFS = Acoustic feedback suppression control AGA = Automatic gain adjustment RA2 = Inverting receive amplifier TXACL = Transmit anti-clipping control Figure 8-1. Figure 8-2. U4090B-P 20 Specification of Logic Levels Typical DC Characteristic RDC = 130k ...
Page 21
... Typical Load Characteristic DC-characteristic and 3-mW Loudspeaker Output 6.0 5.0 4.0 3 2.0 1 RDC = Infinity 200 mV/1 kHz; PSAO = 3 mW; IMP = 2 mA 300 µA; RGSA = 560k U4090B 24k AGA 100 I (mA) L for a Maximum (RDC = Infinity ...
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... Figure 8-6. Figure 8-7. U4090B-P 22 Typical Load Characteristic (RDC = 130 k ) and 3-mW Loudspeaker Output 5.0 4.5 4.0 3.5 3 2.5 2.0 1.5 1.0 0 RDC = 130 200 mV/1 kHz; PSAO = 3 mW; IMP = 2 mA 300 µA; RGSA = 560k Typical Load Characteristic (RDC = and 3-mW Loudspeaker Output 4 ...
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... Figure 8-8. Basic Test Circuit 4741C–CORD–11/05 U4090B-P 23 ...
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... Figure 8-9. Test Circuit for DC Characteristics and Line Detection U4090B-P 24 4741C–CORD–11/05 ...
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... Figure 8-10. Test Circuit for Transmission Amplifier 4741C–CORD–11/05 U4090B-P 25 ...
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... Figure 8-11. Test Circuit for Receiving Amplifier U4090B-P 26 4741C–CORD–11/05 ...
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... Figure 8-12. Test Circuit for Speaker Amplifier VATAFS 4741C–CORD–11/05 U4090B-P 27 ...
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... Figure 8-13. Test Circuit for DTMF Amplifier U4090B-P 28 4741C–CORD–11/05 ...
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... Figure 8-14. Test Circuit for Ringing Power Converter 4741C–CORD–11/05 U4090B-P 29 ...
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... Figure 8-15. Test Circuit for Input Characteristics of I/O Ports U4090B-P 30 open 4741C–CORD–11/05 ...
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... Figure 8-16. Application Circuit for Loud-hearing 4741C–CORD–11/05 U4090B-P 31 ...
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... Figure 8-17. Application for Hands-free Operation U4090B-P 32 4741C–CORD–11/05 ...
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... 330 120 1 U4090B-P 32) Value 30 k 6 330 k 220 3 ...
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... Ordering Information Extended Type Number U4090B-PFNY U4090B-PFNG3Y T4090B-PC 10. Package Information Package SSO44 Dimensions in mm 0.3 0 U4090B-P 34 Package Remarks SSO44 Pb-free SSO44 Taped and reeled, Pb-free Die Chip on foil 18.05 17.80 0.25 0.10 16 9.15 8.65 7.50 7.30 2.35 10.50 10.20 technical drawings according to DIN specifications 0.25 4741C–CORD–11/05 ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...