U4089B ATMEL Corporation, U4089B Datasheet
U4089B
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U4089B Summary of contents
Page 1
... Speaker Phones Description The telephone circuit U4089B linear integrated circuit for use in feature phones, answering machines and fax machines. It contains the speech circuit, side tone equivalent and ear protection rectifiers. The circuit is line-powered and contains all components necessary for the amplification of signals and adaptation to the line. ...
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... Figure 2. Block Diagram 4 MIC1 MIC 3 MIC2 1 DTMF 41 TX TTXA ACL 27 INLDR 26 INLDT Acoustical 29 feedback TLDR suppression 28 TLDT control 25 ATAFS 11 SAO SACL 21 TSACL 23 SAI 22 GSA U4089B STO 600 W 900 W TXA Impedance Transmit mute control MUTX RECO GR SENSE V V IMPSEL AGA IND Power supply ...
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... Pin Configuration Figure 3. Pinning SSO44 4570A–CORD–04/ DTMF MIC2 4 41 MIC1 IND GND 9 36 SENSE SAO VMP IMPSEL 21 24 TSACL 23 22 GSA U4089B RECIN TTXA GR RECO NC NC STI STO IREF AGA TLDR TLDT INLDR INLDT ATAFS MUTX SAI 3 ...
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... Time constant of anti-clipping in transmit path 42 RECIN Input of receiving path; input impedance is typically resistor from this pin to GND sets the amplification of the microphone and DTMF signals; the input amplifier can muted by applying V U4089B-M 4 sets the slope of the DC characteristic and also affects the line ...
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... NPN BOPT in parallel is unable to conduct current. The U4089B-M contains a series regulator which provides a supply voltage V at the 2 mA suitable for a microprocessor. Figure 4. DC Line Interface with Electronic Inductance and Generation of Regulated and Unregulated Supply ...
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... Selection of the active channel is made by comparison of the logarithmically com- pressed TX and RX envelope curves. The system configuration for group listening, which is realized in the U4089B-M, is illus- trated in Figure 7. TXA and SAI represent the two attenuators; the logarithmic envelope detectors are shown in a simplified way (operational amplifiers with two diodes). ...
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... GSA SAI SAI 4570A–CORD–04/03 Figure 6. Basic Voice-switch System Handset microphone Logarithmic Loud speaker INLDT TLDT STO - VBG + AFS control Max AGA att. - VBG + TLDR RECO INLDR U4089B-M TX attenuation Hybrid Attenuation control Logarithmic RX attenuation Zint RECIN GR STI STO STN Line 7 ...
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... Figure 8. Acoustic Feedback Suppression by Alternative Control of Transmit and Speaker Amplifier Gain RLDT RLDR U4089B-M 8 TLDT TXA INLDT INLDR IATGSA TLDR ATAFS RATAFS A detailed diagram of the AFS (Acoustic Feedback Suppression) is given in Figure 8. Receive and transmit signals are first processed by logarithmic rectifiers in order to pro- duce the speech envelopes at TLDT and RLDT ...
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... Figure 10. Threshold of Speaker Amplifier off Figure 11. Comparator Thresholds Depend on the DC Mask and Line Impedance RATAFS RATAFS not usable GSA 36 dB GSA (dB off ¥ 130 (mA) L ILON at line impedance = 600 W ILOFF at line impedance = 600 W ILON at line impedance = 900 W ILOFF at line impedance = 900 W U4089B-M 9 ...
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... RGT = > Distortion at line V = 700 > 19 mA, d < Maximum output voltage V mic CTXA = 1 µF Noise at line psopho- I > metrically weighted U4089B-M 10 Symbol amb T stg P tot Symbol R thJA = 2 mA, RDC = 130 kW amb = GND, unless otherwise specified. MUTX Pin = 2 mV, RGT = 27 kW, Unless Otherwise Specified MIC = -10 to +60° ...
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... GND, unless otherwise specified. MUTX Pin = -10 to +60° rms = 100 100 W = 25°C, RGSA = 560 kW, Symbol Min. Typ. 0 -6.4 -5 300 mV GEN - -7.0 -6 840 900 imp U4089B-M Max. Unit -6. ±0.5 dB ±0.5 dB ±0.5 dB 1.1 Vrms dB V rms mA (peak) -77 dBmp 960 11 ...
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... DTMF Amplifier Test Conditions: IMP = 2 mA 0.3 mA, V Adjustment range of DTMF gain Mute active mA, L VDTMF = 8 mV DTMF amplification Mute active: MUTX = VMP Gain deviaton T amb U4089B mA, RDC = 130 kW amb = GND, unless otherwise specified. MUTX Pin = 560 560 mV -10 to +60° VMP MUTX = -10 to +60°C = 25° ...
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... GND, unless otherwise specified. MUTX Pin = 0 µ µ µ µ = -10 to +60° GND = 25°C, RGSA = 560 kW, Symbol Min. Typ. 60 180 DGD 1.5 ATAFS V 3 +20 MUTX I -20 MUTX MUTX 0 MUTX U4089B-M Max. Unit 300 kW 130 2 % ±0 3.5 V 3.3 V 7.6 V +30 µA -30 µ ...
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... U4089B-M Control U4089B-M 14 MUTX MIC 1/2 transmit enabled receive enable AFS = on 0 AGA = on TXACL = on DTMF transmit enabled receive enable AFS = on Z AGA = on TXACL = on DTMF transmit enabled DTMF to receive enable AFS = off 1 AGA = off TXACL = off IMPSEL Line impedance = 600 W 0 TXA = on ...
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... Figure 12. Typical DC Characteristic Figure 13. Typical Adjustment Range of the Transmit Gain G (dB) T U4089B-M 15 ...
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... U4089B-M 16 Figure 14. Typical Adjustment Range of the Receive Gain Figure 15. Typical AGA Characteristic 4570A–CORD–04/03 ...
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... Figure 16. Typical Load Characteristic Characteristic and a 3-mW Loudspeaker Output Figure 17. Typical Load Characteristic of V (RDC = 130 and a 3-mW Loudspeaker Output U4089B-M for a Maximum (RDC = infinity) B for a Medium DC Characteristic B 17 ...
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... U4089B-M 18 Figure 18. Typical Load Characteristic of V (RDC = and a 3-mW Loudspeaker Output for a Minimum DC Characteristic B 4570A–CORD–04/03 ...
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... Figure 19. DC Voltage Absolute 4570A–CORD–04/03 U4089B-M 19 ...
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... Figure 20. DC Voltage Current Test U4089B-M 20 4570A–CORD–04/03 ...
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... Figure 21. DC Ramps 4570A–CORD–04/03 U4089B-M 21 ...
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... Figure 22. AC Tests U4089B-M 22 4570A–CORD–04/03 ...
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... Figure 23. Application for Hands-free Operation 4570A–CORD–04/03 U4089B-M 23 ...
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... Table 1. Typical Values of External Components (see Figure 23) Name Value C 4 µ 220 µ µ µ 100 µ 150 100 µF 15 Ordering Information Extended Type Number U4089B-MFN U4089B-MFNG3 Package Information Package SSO44 Dimensions in mm 0.3 0 U4089B-M 24 Name Value Name C 47 µ µ µ µ 6 100 470 µF ...
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... Atmel Corporation 2003. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein ...