ICs for Telephone AN6123MS Speech network IC with ALC ■ Overview Unit: mm +0.20 The AN6123MS is an ALC IC for level control of audio signal (300 Hz to 3 kHz). Adopting a mini 5-pin package, mounting on a small area is possible. 2.80 –0.30 1.50 +0.25 –0.05 • Cordless telephone, PDC, PHS telephone 1.45±0.10 +0.10 0.1 to 0.30 0.40±0.20 MINI-5D DET gm Publication date: February 2001 VCC DET 2 Ma int en an ce /D isc on tin ue ■ Block Diagram 0.16 –0.06 +0.20 0.80 1.10 –0.10 0 to 0.10 ■ Applications 2 +0.10 0.95 3 1 3d Input inc p Pl l a ea ne lud se es pla m 4 dGND m v ne ain ain foll htt isit p ten ow ://w foll di d dis 5 teOutput 1 n in ww owi sco con ance anc g fo .se ng ntin tin ty e ty ur mi UR ue ued pe pe Pro co L a d t ty du n.p bo yp pe ct life an ut e d as lat cy on es cle ic. t in sta co fo ge .jp rm . /en at i o / n. • Wide supply voltage operation range of VCC = 2.4 V to 6.0 V • Small current consumption of ICC = 500 µA • Reduction of a bad effect by the external noise thanks to a package for a rear side mounting. 4 0.95 +0.20 2.90 –0.05 ■ Features 1.90±0.10 M Di ain sc te on na tin nc ue e/ d 5 0.65±0.15 0.30 –0.05 0.65±0.15 SDE00002CEB 1 AN6123MS ■ Pin Descriptions Pin No. Description VCC Supply voltage pin 2 DET Detection pin 3 Input Signal input pin 4 GND Grounding pin 5 Output Signal output pin M Di ain sc te on na tin nc ue e/ d 1 Parameter Supply voltage Supply current Power dissipation Operating ambient temperature * Storage temperature * di p Pl lan nclu ea e se pla m d m des ne ain ain foll htt visit d te t o p:/ fo /w llo dis disc nan enan wing ww wi co on ce c fo .se ng ntin tin ty e ty ur mi UR ue ued pe pe Pro co L a d t ty du n.p bo yp pe ct life an ut e d as lat cy on es cle ic. t in sta co fo ge .jp rm . /en at i o / n. ■ Absolute Maximum Ratings Symbol Rating Unit VCC 6.5 V ICC 3.0 mA PD 19.5 mW Topr −20 to +75 °C Tstg −55 to +125 °C Note) *: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VCC 2.4 to 6.0 V Symbol ce /D isc on tin Parameter ue ■ Electrical Characteristics at VCC = 3.0 V, f = 1 kHz, Ta = 25°C Operating current ICC • Design reference data Conditions Without signal input Min Typ Max Unit 450 900 µA en an Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Ma Voltage gain int Parameter Output level Conditions Min Typ Max Unit GV VIN = −40 dBm 22 24 26 dB VO VIN = −10 dBm −9.5 −7.5 −5.5 dBm −1.5 1.5 dB ALC control range ∆ALC Output level varying amount at VIN = −25 dBm, VIN = 0 dBm Total harmonic distortion factor THD At VIN = −10 dBm 1 3 % Output noise voltage VNO Terminated by CCIT filter input 2 kΩ −70 −60 dBm Input impedance ZIN Pin 3 input impedance 15 30 45 kΩ ZOUT Pin 5 output impedance 200 400 600 Ω Output impedance 2 Symbol SDE00002CEB AN6123MS ■ Application Notes 1. I/O characteristics and distortion 10 kΩ GND 3 4 5 AN6123MS 1 2 Signal output 2 200 pF The I/O characteristics in the circuit shown on the left can be referred to in the graph below. Also note that if the C in the circuit is lowered, the distortion characteristics will become worse (Graph 2). M Di ain sc te on na tin nc ue e/ d 0.33 µF Signal input (Input frequency = 1 kHz) 1 MΩ C 10 µF di p Pl lan nclu ea e se pla m d m des ne ain ain foll htt visit d te t o p:/ fo /w llo dis disc nan enan wing ww wi co on ce c fo .se ng ntin tin ty e ty ur mi UR ue ued pe pe Pro co L a d t ty du n.p bo yp pe ct life an ut e d as lat cy on es cle ic. t in sta co fo ge .jp rm . /en at i o / n. 3.0 V Graph 1. I/O characteristics and distortion (when C = 10 µF) 12 0 −5 10 Output level −15 8 −20 −25 6 −30 4 −35 −40 Distortion −45 −50 −70 −60 −50 −40 −30 Distortion (%) Output level (dBm) −10 2 −20 −10 0 10 0 Input level (dBm) Ma int en an Distortion (%) ce /D isc on tin ue Graph 2. Distortion characteristics when C is variable 13 12 11 10 9 8 7 6 5 4 3 2 1 0 −40 C = 10 µF C = 1.0 µF C = 4.7 µF C = 2.2 µF −35 −30 −25 −20 −15 −10 −5 0 5 10 Input lebve; (dBm) SDE00002CEB 3 AN6123MS ■ Application Notes (continued) 2. Input level adjustment for maximum output Signal input (1 kHz) 0.33 µF 3.3 kΩ 3 4 5 AN6123MS 1 2 2 200 pF M Di ain sc te on na tin nc ue e/ d R Signal output 10 kΩ GND You can adjust R in the left circuit diagram to find the operation point for a maximum output level. For example, since the input level for a maximum output is −30 dBm when R is open and the attenuation in the input stage is 20 log (3k/6.3k) = −6.4 dB when R is 3 kΩ. This means a total gain loss is −6.4 dB as compared with open mode, hence the input level to get the maximum output is −23.6 dBm. Likewise, the attenuation is 12.7 dB for R = 1 kΩ and the desired input level becomes 17.3 dBm. 1M Ω 10 µF 10 µF di p Pl lan nclu ea e se pla m d m des ne ain ain foll htt visit d te t o p:/ fo /w llo dis disc nan enan wing ww wi co on ce c fo .se ng ntin tin ty e ty ur mi UR ue ued pe pe Pro co L a d t ty du n.p bo yp pe ct life an ut e d as lat cy on es cle ic. t in sta co fo ge .jp rm . /en at i o / n. 3.0 V I/O characteristics 0 −5 Output level (dBm) −10 −15 R = Open −20 −25 −30 −35 R = 3 kΩ −40 R = 1 kΩ −45 −50 −55 −60 −70 −65 −60 −55 −50 −45 −40 −35 −30 −25 −20 −15 −10 −5 0 Input level (dBm) 3. Output level adjustment for a maximum output 0.33 µF 10 kΩ GND ce /D isc on tin ue Signal input (1 kHz) 3.3 kΩ 1M Ω 3.0 V Ma int en 10 µF 4 5 AN6123MS 1 2 an 3 Signal output R 2 200 pF 10 µF The maximum output level can be adjusted by R in the left circuit diagram. Since the maximum output is −7.5 dBm when R is open, it is 20 log (20k/30k) = −3.5 dBm at R = 20 kΩ. It is an attenuated value of by 3.4 dB against open mode. Therefore, the maximum output becomes −11 dBm. Likewise, for R = 10 kΩ, attenuation is 6 dB and the maximum output becomes −13.5 dBm. I/O characteristics 0 R = Open Output level (dBm) −5 R = 20 kΩ −10 −15 R = 10 kΩ −20 −25 −30 −35 −50 −45 −40 −35 −30 −25 Input level (dBm) 4 SDE00002CEB −20 −15 −10 AN6123MS ■ Application Notes (continued) 4. Frequency characteristics Signal input 0.33 µF 10 kΩ GND The AN6123MS itself has an almost flat frequency characteristic in the audio frequency band. The high-band frequency is set with R and C shown in the left circuit. The cut-off frequency fC at R = 10 kΩ and C = 2 200 pF, that is the frequency at which the frequency characteristic deteriorates by 3 dB, is fC = 1/2πCR = 7.2 kHz. At R = 10 kΩ and C = 1 000 pF, it is 16 kHz. (Refer to the graph.) Signal output R 3 4 5 AN6123MS 1 2 M Di ain sc te on na tin nc ue e/ d C 10 µF 10 µF 1 MΩ di p Pl lan nclu ea 4 e se pla m d m des n ai a fo htt visit p:/ fo 5 d ed d nten inten llow /w llo is isc an an ing ww wi co on ce c fo .se ng ntin tin ty e ty ur mi UR ue ued pe pe Pro co L a d t ty du n.p bo yp pe ct life an ut e d as lat cy on es cle ic. t in sta co fo ge .jp rm . /en at i o / n. 3.0 V Frequency characteristics 10 8 For C = 1 000 pF 6 Gain (dB) 4 2 0 Input signal level: −10 dBm −2 For C = 2 200 pF −4 −6 −8 −10 100 1k 10k 100k Input frequency (Hz) ■ Application Circuit Example ue Signal input (300 Hz to 3 kHz) GND 10 kΩ ce /D isc on tin 0.33 µF R 2 200 pF Ma int en an 3 3.3 kΩ Signal output 0.9 V[p-p] Noise = −70 dBm Distortion = 1% G = 30 dB 10 µF gm 1 2 DET VCC 1 MΩ 2.4 V to 6.0 V SDE00002CEB 10 µF 5 Request for your special attention and precautions in using the technical information and semiconductors described in this book (1) If any of the products or technical information described in this book is to be exported or provided to non-residents, the laws and regulations of the exporting country, especially, those with regard to security export control, must be observed. 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