Document
ICs for Telephone
AN6123MS
Speech network IC with ALC
s 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.
1.9 ± 0.1 0.95 1 0.95 2
0.1 to 0.3
0.10 0.16 + − 0.06
0.25 1.5 + − 0.05 0.2 2.8 + − 0.3
Unit: mm
0.65 ± 0.15
s Features
• 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.
5 4 0.3
0.2 2.9 + − 0.05
3
0.4 ± 0.2
0.2 1.1 + − 0.1
+ 0.1 − 0.05
1.45 ± 0.1
• Cordless telephone, PDC, PHS telephone
MINI-5D
s Block Diagram
Input Output GND
3
4
DET
gm
DET 2
VCC 1
5
0 to 0.1
s Applications
0.8
0.65 ± 0.15
1
AN6213MS
s Pin Descriptions
Pin No. 1 2 3 4 5 VCC DET Input GND Output Description Supply voltage pin Detection pin Signal input pin Grounding pin Signal output pin
ICs for Telephone
s Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation Operating ambient temperature Storage temperature
* *
Symbol VCC ICC PD Topr Tstg
Rating 6.5 3.0 19.5 −20 to +75 −55 to +125
Unit V mA mW °C °C
Note) *: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
s Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 2.4 to 6.0 Unit V
s Electrical Characteristics at VCC = 3.0 V, f = 1 kHz, Ta = 25°C
Parameter Operating current • Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Symbol ICC
Conditions Without signal input
Min
Typ 450
Max 900
Unit µA
Parameter Voltage gain Output level ALC control range Total harmonic distortion factor Output noise voltage Input impedance Output impedance
Symbol GV VO ∆ALC THD VNO ZIN ZOUT
Conditions VIN = −40 dBm VIN = −10 dBm Output level varying amount at VIN = −25 dBm, VIN = 0 dBm At VIN = −10 dBm Terminated by CCIT filter input 2 kΩ Pin 3 input impedance Pin 5 output impedance
Min 22 −9.5 −1.5 15 200
Typ 24 −7.5 1 −70 30 400
Max 26 −5.5 1.5 3 −60 45 600
Unit dB dBm dB % dBm kΩ Ω
2
ICs for Telephone
s Application Notes
1. I/O characteristics and distortion
33 µF Signal input (Input frequency = 1 kHz) GND 3 10 kΩ Signal output
AN6123MS
4 5 AN6123MS 1 2 1 MΩ 3.0 V
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).
C
10 µF
Graph 1. I/O characteristics and distortion (when C = 10 µF)
0 −5 −10 10 Output level 8 6 4 Distortion 2 0 10 −15 −20 −25 −30 −35 −40 −45 −50 −70 −60 −50 −40 −30 −20 −10 0 12
Output level (dBm)
Input level (dBm)
Graph 2. Distortion characteristics when C is variable
13 12 11 10 9 8 7 6 5 4 3 2 1 0 −40
Distortion (%)
C = 10 µF C = 4.7 µF C = 2.2 µF
C = 1.0 µF
−35
−30
−25
.