AN6215S PANASONIC | Alldatasheet

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Technical content

AGC IC for telephone speech network n Overview The AN6215S is an AGC IC for telephone speech network, and it incorporates an microphone input detec- tion circuit and a receiver gain control circuit. It is espe- cially best suited for cordless telephone thanks to a good speech tone quality obtained by reducing howling and echo sound. n Features

  • Operation with wide power supply voltage range from 2.1 V to 6.0 V
  • Enlargement of dynamic range by incorporating a vari- able VREF circuit that varies according to the supply voltage
  • Possible to adjust the received voice attenuation amount with an external resistor
  • Possible to adjust the AGC operating point with an ex- ternal resistor
  • Possible to design with fewer external components n Block Diagram SOP008-P-0225A Unit: mm 0.4 ± 0.25 0.6 ± 0.31.27 5.0 ± 0.3 0.1 ± 0.1 0.3 4.2 ± 0.3 6.5 ± 0.3 0.15 0.65 1.5 ± 0.2 V REF Det. CC Buff

8 V CCGND

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 2.1 to 6.0 V Pin No. Symbol Description

1 GND Ground pin

2 DGAIN Variable gain adjustment pin

3 RX IN Receiver signal input pin

4 RX OUT Receiver signal output pin

5 TX DET Transmitter signal detection pin

6 TX IN Transmitter signal input pin

n Electrical Characteristics at Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Operating current *1 ICC Operating time at no signal input¾ 1.4 2.0 mA Receiver amp. voltage gain *1 G RX RX in = -20 dBm 1.5 3.5 5.5 dB Receiver amp. output D range *1 V ORX Output voltage at THD = 5% 0 2 ¾ dBm Receiver amp. DGain Receiver amp. gain variation between-10 -8 -6d B variable gain width *1, *2 TX in = -50 dBm and TX in = -30 dBm High-level VREF control sink current ICH V CH = 3 V ¾ 25 50 mA High-level VREF control voltage V CH Pin 7 voltage range in a base-set mode 1.5¾ V CC V Low-level VREF control voltage V CL Pin 7 voltage range in a hand-set mode 0¾ 0.5 V Note) 1. VCC = 5.0 V, f = 1 kHz unless otherwise specified. 2.*1: Pin 7 DC voltage sets to VCH = 5.0 V *2: ERO-25CKF6802 produced by Matsushita Electronic Components Co. is used for RX in = -30 dBm. (Refer to "˙Application circuit example".)

n Electrical Characteristics at Ta = 25°C (continued)

  • Design reference data Note) 1. The characteristics listed below are theoretical values based on the IC design and are not guaranteed. 2. VCC = 5.0 V, f = 1 kHz unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit Detection circuit input impedance ZIDET Pin 5 input impedance ¾ 50 ¾W Detection circuit gain G DET R in = 10 kW¾ 27 ¾ dB Receiver amp. input impedance Z IRX Pin 3 input impedance ¾ 25 ¾ kW Receiver amp. output wave THD V ORX = -10 dBm (80 kHz LPF) ¾ 0.3 ¾ % distortion factor Receiver amp. output noise voltage NORX Wide band ¾- 65 ¾ dBm Receiver amp. output impedance ZORX Pin 4 output impedance ¾ 1 ¾ kW Sidetone control operation voltage VDET DC voltage of pin 5 ¾ 0.3 ¾ V when sidetone control operates Sidetone control DGain DR DRX out/DTX in ¾- 0.6 ¾ dB/dB variation rate at TX in = -39 dBm Base set mode VREF voltage V RB Pin 4 DC voltage at pin 7 = high ¾ 2 ¾ V Hand set mode VREF voltage V RH Pin 4 DC voltage at pin 7 = low ¾ 1.15 ¾ V Pin No. Equivalent circuit Description Typical wave 1 ¾ GND: Ground pin

2 DGAIN: Gain adjustment pin

Gain width of receiver amp. can be changed by changing the external resistance. R1 to large fi Gain width becomes large. R1 to small fi Gain width becomes small.

3 RX IN: Receiver signal input pin

Input receiver sound signal from line. Input impedance is 25 kW .

4 RX OUT: Receiver signal output pin

Connect receiver amp. etc. Output impedance is approximately 50 W . ɹ n Terminal Equivalent Circuits R11.15 V 68 kW 17 mA Receiver amp.I2 3 4 25 kW V REF C1 C2 Receiver amp. Receiver signal To receiver amp. 0 V DC 1.15 V

Pin No. Equivalent circuit Description Typical wave

5 TX DET:

Transmitter signal detection pin Connect a smoothing capacitor and a resister to adjust attack-recovery time of transmitter signal detection. Detection amp. gain is determined by the following equation: G = 100 (kW ) · 3 R 4 (kW ) C3 large fi Attack time becomes long. R3 small fi Recovery time becomes short.

6 TX IN: Transmitter signal input pin

Input transmitter sound signal ɹ 7V C : Reference voltage control pin Reference voltage VREF becomes 2 V when voltage is high, and becomes 1.15 V when voltage is low. Normally, reference voltage is set to V REF = 2 V when it is used for a base- set, and to VREF = 1.15 V when it is used for a hand-set. 8 ¾ V CC : Supply voltage pin Connect supply voltage. ɹ n Terminal Equivalent Circuits (continued) 100 kW R3 100 kW DC 10 mF To receiver amp. Full wave detection Detection Transmitter signal 10 kW 180 kW 100 kW V H /VL DC Input With capacitor Without capacitor DC DC