AN6123

AN6123MS PANASONIC | Alldatasheet

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Technical content

Speech network IC with ALC n Overview 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. n Features

• Wide supply voltage operation range of VCC = 2.4 V to 6.0 V
• Small current consumption of ICC = 500 mA
• Reduction of a bad effect by the external noise thanks to a package for a rear side mounting. n Applications
• Cordless telephone, PDC, PHS telephone n Block Diagram MINI-5D Unit: mm DET gm V CC Output GND DET Input 2.8 1.5 35 4 1.9 ± 0.1 + 0.2 - 0.3 0.16 + 0.10 - 0.06 0.4 ± 0.2 0.950.95 0.3 + 0.1 - 0.05 0.1 to 0.3 - 0.05 1.45 ± 0.1 2.9 + 0.2 0 to 0.1 0.8 1.1 + 0.2 - 0.1 + 0.25 - 0.05

AN6213MS ICs for Telephone n Pin Descriptions Pin No. Description 1V CC Supply voltage pin

2 DET Detection pin

3 Input Signal input pin

4 GND Grounding pin

5 Output Signal output pin

Parameter Symbol Conditions Min Typ Max Unit Operating current I CC Without signal input ¾ 450 900 mA n Electrical Characteristics at VCC = 3.0 V, f = 1 kHz, Ta = 25°C n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 6.5 V Supply current I CC 3.0 mA Power dissipation P D 19.5 mW Operating ambient temperature * T opr -20 to +75 °C Storage temperature * Tstg -55 to +125 °C Note) *: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 2.4 to 6.0 V Parameter Symbol Conditions Min Typ Max Unit Voltage gain G V V IN = -40 dBm 22 24 26 dB Output level V O V IN = -10 dBm -9.5 -7.5 -5.5 dBm ALC control range DALC Output level varying amount -1.5 ¾ 1.5 dB at VIN = -25 dBm, VIN = 0 dBm Total harmonic distortion factor THD At V IN = -10 dBm ¾1 3 % Output noise voltage V NO Terminated by CCIT filter input 2 kW ¾- 70 -60 dBm Input impedance Z IN Pin 3 input impedance 15 30 45 k W Output impedance Z OUT Pin 5 output impedance 200 400 600 W

• Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.

ICs for Telephone AN6123MS n Application Notes 1. I/O characteristics and distortion 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). GND 10 kW 2 200 pF 33 mF 10 mFC 1 M W 3.0 V Signal output Signal input (Input frequency = 1 kHz) 43 AN6123MS Graph 1. I/O characteristics and distortion (when C = 10 mF) -50 0 -70 -60 -50 -40 -30 -20 -10 0 10 -45 -40 -35 -30 -25 -20 -15 -10 Output level (dBm) Distortion (% ) Input level (dBm) Output level Distortion Graph 2. Distortion characteristics when C is variable -40 -35 -30 -25 -20 -15 -10 -5 05 1 0 Distortion (% ) Input lebve; (dBm) C = 4.7 mF C = 10 mF C = 1.0 mF C = 2.2 mF

AN6213MS ICs for Telephone n Application Notes (continued) 2. Input level adjustment for maximum output You can adjust R in the left circuit diagram to find the operation point for a maximum out- put 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 kW . 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 kW and the desired input level becomes 17.3 dBm. I/O characteristics GND 10 kW 2 200 pF 33 mF 10 mF10 mF 1M W 3.0 V Signal input (1 kHz) AN6123MS R 3.3 kW Signal output -60 -55 -50 -40 -45 -35 -30 -25 -20 -15 -10 Output level (dBm) Input level (dBm) R = 3 kW R = Open R = 1 kW 3. Output level adjustment for a maximum output 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 kW . It is an attenuated value of by 3.4 dB against open mode. Therefore, the maxi- mum output becomes -11 dBm. Likewise, for R = 10 kW , attenuation is 6 dB and the maximum output becomes -13.5 dBm. I/O characteristics -35 -30 -25 -20 -15 -10 Output level (dBm) Input level (dBm) R = 10 kW R = Open R = 20 kW GND 10 kW 2 200 pF 33 mF 10 mF10 mF 1M W 3.0 V Signal outputSignal input (1 kHz) AN6123MS R 3.3 kW

ICs for Telephone AN6123MS n Application Notes (continued) 4. Frequency characteristics The AN6123MS itself has an almost flat fre- quency 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 f C at R = 10 kW and C = 2 200 pF, that is the frequency at which the frequency characteristic deteriorates by 3 dB, is f C = 1/2pCR = 7.2 kHz. At R = 10 kW and C = 1 000 pF, it is 16 kHz. (Refer to the graph.) Frequency characteristics GND 10 kW33 mF 10 mF10 mF 1 M W 3.0 V AN6123MS R C Signal outputSignal input Input frequency (Hz) Gain (dB) 100 1k 10k 100k-10 For C = 1 000 pF For C = 2 200 pF Input signal level: -10 dBm n Application Circuit Example V CC GND 10 kW 3.3 kW 2 200 pF 33 mF 10 mF10 mF 1 M W 2.4 V ~ 6.0 V G = 30 dB Signal output

0.9 V[p-p]

Noise = -70 dBm Distortion = 1% Signal input (300 Hz ~ 3 kHz) R DET gm