U4091B

U4091B TEMIC | Alldatasheet

Document overview

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Technical content

Features

/C0068Speech circuit with anti-clipping /C0068Tone ringer interface with dc / dc converter /C0068Speaker amplifier with anti-distortion /C0068Power supply management, regulated, unregulated and a special supply for electret microphone /C0068V oice switch Benefits /C0068Savings of one piezo electric transducer /C0068Complete system integration of analog signal proces- sing on one chip /C0068Very few external components

Applications

Feature phone, answering machine, fax machine, speaker phone MC with EEPROM/ DTMF Audio amplifier Speech circuit V oice switch Tone ringer Loudhearing and Tone ringing ÁÁ ÁÁ BUS

TELEFUNKEN SemiconductorsU4091B Preliminary Information Rev. A1: 12.07.19952 (11) Serial Bus Controlled Functions Speech circuit /C0068Transmit gain: 36 to 52 dB (1 dB step) /C0068Receive gain: –7 dB to +9 dB (1 dB step) + one 6 dB step /C0068Speaker amplifier gain: –10 dB to +30 dB (1.5 dB step) /C0068Mute R, Mute T /C0068Automatic gain adjustment ( AGA ): 7 different characteristics /C0068Impedance selection: 600/ 900 /C0087 Ringer /C0068V olume adjustment Voice switch /C0068V olume adjustment /C0068Attenuation range: 0 to 50 dB (1 dB steps) /C00684 thresholds for mode switching /C0068Mute of handsfree microphone /C0068Chip disable /C0068Hand set / handsfree switching /C0068Four point level detection

TELEFUNKEN Semiconductors U4091B Preliminary Information Rev. A1: 12.07.1995 3 (11) Pin Description Pin Symbol Function DTMF Input for DTMF signals, also used for the answering machine and handsfree input MICO Output of microphone preamplifier MIC 2 Non-inverting input of microphone amplifier MIC 1 Inverting input of microphone amplifier PD Active high input for reducing the current consumption of the circuit, simultaneously V L is shorted by an internal switch IND The internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin, a resistor connected to ground may be used to reduce the dc line voltage V L Line voltage GND Reference point for dc- and ac-output signals SENSE A small resistor (fixed) connected from this pin to V L sets the slope of the dc characteristic and also effects the line length equalization characteristics and the line current at which the loudspeaker amplifier is switched on V B Unregulated supply voltage for peripheral circuits (voice switch), limited to typically 7 V SAO Output of loudspeaker amplifier V MPS Unregulated supply voltage for µP, limited to 6.3 V V MP Regulated supply voltage 3.3 V for peripheral circuits (especially microprocessors), maximum output current: 2 mA SWOUT Output for driving external switching transistor COSC 40 kHz oscillator for ringing power converter VRING Input for ringing signal THA Threshold adjustment for ringing frequency detector RFDO Output of ringing frequency detector LIDET Line detect; output is low when the line current is more than 15 mA Pin Symbol Function TSACL Time constant of anti-clipping of speaker amplifier SA I Speaker amplifier input (for loudspeaker, tone ringer and handsfree use) RLO1 Receive level output 1 RLI1 Receive level input 1 MICHF Handsfree Mic input BNMT Background noise monitor in trans- mit direction RLI2 Receive level input 2 RLO2 Receive level output 2 C Clock D Data Reset Reset IREF Internal reference current generation; RREF = 62 kΩ ; IREF = 20 µA STO Side tone reduction output output resistance is approx. 300 Ω , maximum load impedance: 10 kΩ. V M Reference node for microphone- earphone and loudspeaker amplifier, supply for electret microphone (IM ≤ 300 /C0109A) RECO 2 Inverting output of receiving amplifier STI S Input for side tone network (short loop) or for answering machine STI L Input for side tone network (long loop) RAC Input of receiving amplifier for ac coupling in feedback path RECO 1 Output of receiving amplifier TTXA Time constant of anticlipping in transmit path RECIN Input of receiving path; input impedance is typically 80 k/C0087 TXIN Input of intermediate transmit stage, input resistance is typically 20 kΩ TLDI Transmit level detector input TLDO Time constant of level detector for transmit voice recognition TS Time constant for switching

TELEFUNKEN SemiconductorsU4091B Preliminary Information Rev. A1: 12.07.19954 (11) Absolute Maximum Ratings Parameters Symbol Value Unit Line current IL 140 mA DC line voltage V L 12 V Maximum input current IRING 15 mA Junction temperature Tj 125 °C Ambient temperature Tamb –25 to +75 °C Storage temperature Tstg –55 to +150 °C Total power dissipation, Tamb = 60°C Ptot 0.9 W Thermal Resistance Parameters Symbol Value Unit Junction ambient SSO44 R thJA 70 K/W

TELEFUNKEN Semiconductors U4091B Preliminary Information Rev. A1: 12.07.1995 5 (11)

Electrical Characteristics

f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 k/C0087, Tamb = 25°C, Zear = 68 nF + 100 /C0087, ZM = 68 nF, unless otherwise specified. Parameters Test Conditions / PinSymbol Min. Typ. Max. Unit Figure DC characteristics DC voltage drop over circuitIL = 2 mA IL = 14 mA IL = 60 mA IL = 100 mA V L 4.6 8.8 2.4 5.0 7.5 9.4 5.4 10.0 V Transmission amplifier, IL = 14 mA, VMIC = 2 mV , RGT = 27 k/C0087, unless otherwise specified Adjustment range of transmit gain G T 36 52 dB Transmitting amplification G T 47 48 49 dB Frequency response IL /C0119 14 mA, f = 300 to 3400 Hz /C0068G T /C00340.5 dB Gain change with current Pin 31 open IL = 14 to 100 mA /C0068G T /C00340.5 dB Gain deviation Tamb = –10 to +60 °C /C0068G T /C00340.5 dB CMRR of microphone amplifier CMRR 60 80 dB Input resistance of MIC amplifier RGT = 12 k/C0087 RGT = 27 k/C0087 R i 75 110 k/C0087 Distortion at line IL > 14 mA V L = 700 mVrms dt 2 % Maximum output voltage IL > 19 mA d < 5% Vmic = 25 mV CTXA = 1 /C0109F V Lmax 1.8 3 4.2 dBm Noise at line psophomet- rically weighted IL > 14 mA G T = 48 dB no –80 –72 dBmp Anti-clipping attack time release time CTXA = 1 /C0109F each 3 dB overdrive 0.5 ms Gain at low operating currentIL = 10 mA IMP = 1 mA RDC = 68 k/C0087 Vmic = 1 mV IM = 300 /C0109A G T 40 42.5 dB Distortion at low operating current IL = 10 mA IM = 300 /C0109A IMP = 1 mA RDC = 68 k/C0087 Vmic = 10 mV dt 5 % Line loss compensation IL = 100 mA /C0068G TI –6.4 –5.8 –5.2 dB Mute suppression a) MIC muted (microphone preamplifier IL /C0119 14 mA Mutx = open G TM 60 80 dB pp b) TXA muted (second stage) IMPSEL = open G TTX 60 dB

TELEFUNKEN SemiconductorsU4091B Preliminary Information Rev. A1: 12.07.19956 (11) Parameters Test Conditions / PinSymbol Min. Typ. Max. Unit Figure Receiving amplifier, IL = 14 mA, RGR = 62 k, unless otherwise specified, VGEN = 300 mV Adjustment range of receiving gain IL /C0119 14 mA, single ended differential MUTR = GND G R –7 +15 dB Receiving amplification RGR = 62 k/C0087 differential G R – 1.75 – 1 – 0.25 dB Amplification of DTMF signal from DTMF IN to RECO 1, 2 IL /C0119 14 mA V MUTX = VMP G RM 7 10 13 dB Frequency response IL > 14 mA, f = 300 to 3400 Hz /C0068G RF /C00340.5 dB Gain change with current IL = 14 to 100 mA /C0068G R /C00340.5 dB Gain deviation Tamb = –10 to +60°C /C0068G R /C00340.5 dB Ear protection differentialIL /C0119 14 mA VGEN = 11 Vrms EP 2.2 Vrms MUTE suppression a) RECATT b) RA2 c) DTMF operation IL /C0119 14 mA MUTR = open V MUTR = VMP V MUTX = VMP /C0068G R 60 dB Output voltage d /C0118 2% differential IL = 14 mA Zear = 68 nF + 100 /C0087 0.775 Vrms Maximum output current d /C0118 2% Zear = 100 /C0087 4 mA (peak) Receiving noise psophometrically weigthed Zear = 68 nF + 100 /C0087 IL /C0119 14 mA ni –80 –77 dBmp Output resistance each output against GND Ro 10 /C0087 Line loss compensation RAGA = 20 k /C0087/C0044 IL = 100 mA /C0068G RI –7.0 –6.0 –5.0 dB Gain at low operating currentIL = 10 mA IMP = 1 mA IM = 300 /C0109A V GEN = 560 mV RDC = 68 k/C0087 G R –2 –1 0 dB AC impedance V IMPSEL = GND V IMPSEL = VMP Zimp Zimp 570 840 600 900 640 960 /C0087 /C0087 Distortion at low operating current IL = 10 mA IMP = 1 mA V GEN = 560 mV RDC = 68 k/C0087 dR 5 %

TELEFUNKEN Semiconductors U4091B Preliminary Information Rev. A1: 12.07.1995 7 (11) Parameters Test Conditions / PinSymbol Min. Typ. Max. Unit Figure Speaker Amplifier Minimum line current for operation No ac signal ILmin 16 mA Input resistance 14 22 k/C0087 Gain from SAI to SAO V SAI = 3 mV , RGSA = 20 k/C0087 G SA 30 31 – 3 32 dB Output power Load resistance R L = 50 /C0087, d < 5% V SAI = 20 mV IL = 20 mA PSA PSA t.b.d. mW Output noise (Input SAI open) psophometrically weighted nSA 200 /C0109V psoph Gain deviation Tamb = –10 to +60°C /C0068G SA /C00341 dB Mute suppression V L = 0 dBm, V SAI = 4 mV Pin 23 open VSAO –60 dBm Gain change with current /C0068G SA /C00341 dB Gain change with frequencyf = 300 to 3400 Hz /C0068G SA /C00340.5 dB Attack time of anti-clipping20 dB over drive tr 5 ms Release time of anti-clipping tf 80 ms DTMF-Amplifier Test conditions: IMP = 2 mA, IM = 0.3 mA, V MUTX = VMP Adjustment range of DTMF gain IL = 15 mA Mute active G D 40 48 dB DTMF amplification IL = 15 mA, VDTMF = 8 mV Mute active: MUTX = VMP G D 40.7 41.7 42.7 dB Gain deviaton IL = 15 mA Tamb = –10 to +60 °C G D /C00340.5 dB Input resistance RGT = 27 k/C0087, RGT = 15 k/C0087 R i 60 180 300 130 k/C0087 Distortion of DTMF signal IL /C0119 15 mA V L = 0 dBm dD 2 % Gain deviation with currentIL = 15 to 100 mA /C0068GD /C00340.5 dB AFS Acoustic feedback suppression Adjustment range of attenua- tion 0 50 dB

TELEFUNKEN SemiconductorsU4091B Preliminary Information Rev. A1: 12.07.19958 (11) Parameters Test Conditions / PinSymbol Min. Typ. Max. Unit Figure Supply voltages, Vmic = 25 mV , Tamb = – 10 to + 60°C V MP IL = 14 mA, RDC = 68 k/C0087 IMP = 2 mA V MP 3.1 3.3 3.5 V V MPS IL = 100 mA RDC = inf., I MP = 0 mA V MPS 6.7 V V M IL /C0119 14 mA, IM = 300 /C0109A RDC = 130 k/C0087 V M 1.4 3.3 V V B IB = + 20 mA, IL = 0 mA V B 7 7.6 V Ringing power converter, IMP = 1 mA, IM = 0 Maximum output power V RING = 20.6 V PSA 20 mW Threshold of ring frequency detector RFDO: low to high V HYST = VRING ON – V RING O FF V RINGON VHYST 17.5 11.0 V Input impedance V RING = 30 V R RING 4 5 6 k/C0087 Input impedance in speech mode f = 300 Hz to 3400 Hz I L > 15 mA, V RING = 20V + 1.5Vrms R RINGSP 150 k/C0087 Logic-level of frequency detector V RING = 0 V , V B = 4 V V RING = 25 V V RFDO 0 VMP V PD Input PD input current PD active, IL > 14 mA V PD = VMP Ipd 9 uA Input voltage PD = active PD = inactive V pd V pd 0.3 V V oltage drop at VL IL = 14 mA, PD = active I L = 100 mA, PD = active V L V L 1.5 1.9 V Line detection Line current for LIDET active PD = inactive ILON 12.6 mA Line current for LIDET inactive PD = inactive ILOFF 11.0 mA Current threshold during power down V B = 5 V , PD = activeILONPD 0.8 1.6 2.4 mA

TELEFUNKEN Semiconductors U4091B Preliminary Information Rev. A1: 12.07.1995 9 (11) CLOCK OUTPUT <CO> CO 94 7896 e Serial Bus The circuit is remoted by an external microcontroller through the serial bus: The data is an 8-bit word: B7 – B6 – B5: address of the destination register (0 to 7) B4 – B0: contents of register The data line must be stable when the clock is high and data must be serially shifted. After 8 clock periods, the transfer to the destination regis- ter is (internally) generated by a low to high transition of the data line when the clock is high. DATA CLOCK D C /C0109P 937613 937614

TELEFUNKEN SemiconductorsU4091B Preliminary Information Rev. A1: 12.07.199510 (11) Serial Bus Interface 8 bits register Analog Commands DATA CLOCK 937616 937615

TELEFUNKEN Semiconductors U4091B Preliminary Information Rev. A1: 12.07.1995 11 (11) 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