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PDF MC34216A Data sheet ( Hoja de datos )
| Número de pieza | MC34216A | |
| Descripción | PROGRAMMABLE TELEPHONE LINE INTERFACE CIRCUIT WITH LOUDSPEAKER AMPLIFIER | |
| Fabricantes | Motorola Semiconductors | |
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MC34216A
Advance Information
Programmable Telephone
Line Interface Circuit with
Loudspeaker Amplifier
The MC34216A is developed for use in telephone applications where,
besides the standard telephone functions, the group listening–in feature is
also required. In cooperation with a microcontroller, the circuit performs all
basic telephone functions including DTMF generation and pulse–dialing.
The listening–in part includes a loudspeaker amplifier, an anti–howling
circuit and a strong supply. In combination with the TCA3385, the ringing is
performed via the loudspeaker.
• Programmable DC Mask, for France, U.K., and Voltage Regulated
Countries
• DC Mask for France and U.K. (MC34216ADWF)
• Programmable Volume for Listening–In and Ringing
• Small Amount of External Components
• On–Chip DTMF and Ring Signal Generator
• Efficient Supply Point for Loudspeaker Amplifier and Peripherals
• Programmable Modes for Speakerphone, Answering Machine, Fax and
Modem Applications
• Pilot and Idle Tones Provide Extra Phone Features
PROGRAMMABLE
TELEPHONE LINE
INTERFACE CIRCUIT WITH
LOUDSPEAKER AMPLIFIER
SEMICONDUCTOR
TECHNICAL DATA
28
1
DW, DWF SUFFIX
PLASTIC PACKAGE
CASE 751F
PIN CONNECTIONS
Simplified Block Diagram
DC and AC
Termination
Line +
Handset
Earpiece
Handset
MIcrophone
Base
Loudspeaker
Ear
Mic
LSP
DC Mask
Generation AC
Termination 2–4
Wire Conversion
Supply
Stabilizer
Line
Driver
Anti–
Howling
DTMF and
Ring
Generator
Micro-
controller
Interface
This device contains 6,507 active transistors.
Line –
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
MOTOROLA ANALOG IC DEVICE DATA
AHO1 1
AHO2 2
MTF 3
MTC 4
AGnd 5
TXI 6
Mic 7
LAO 8
LAI 9
HYN 10
NDC 11
CM 12
IMP 13
SAO 14
28 AGC
27 RXO2
26 RXO1
25 RXI
24 LPI
23 LPO
22 Gnd
21 VCC
20 Iref
19 RS
18 Clk
17 D/HS
16 Osc
15 SAI
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34216ADW
MC34216ADWF TA = 0° to +70°C
SO–28L
SO–28L
© Motorola, Inc. 1996
1
1 page  
MC34216A
AC ELECTRICAL CHARACTERISTICS (continued) (TA = 25°C)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁCharacteristic
Symbol
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTRANSMIT PABX MODE
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁFrench and U.K.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTransmit Gain (I2 = 2.0µA)
Variation with Line Length (I2 = 27 µA)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLow Voltage Mode (MC34216ADW Only)
KPABX
∆KPABX
Min Typ Max
11.4 12.5 13.6
–0.5 –
0.5
Unit
dB
dB
Transmit Gain (I2 = 2.0 µA)
KPABX
11.5 12.5 13.6
Variation with Line Length (I2 = 20 µA)
Variation with Line Current (ICC = 16 mA)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVariation with Line Current (ICC = 7.0 mA)
∆KPABX
∆KPABX1
∆KPABX2
–0.5
–0.5
–2.0
–
0
0
0.5
0.5
2.0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁRECEIVE PABX MODE
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁFrench
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInternal Transconductance (I2 = 2.0µA)
Variation with Line Length (I2 = 27 µA)
GPABX
∆GPABX
157 180 207 µA/V
–0.5 – 0.5 dB
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁU.K.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInternal Transconductance (I2 = 2.0µA)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVariation with Line Length (I2 = 27 µA)
GPABX
∆GPABX
157 180 207 µA/V
–0.5 – 0.5 dB
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLow Voltage Mode (MC34216ADW Only)
Internal Transconductance (I2 = 2.0 µA)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVariation with Line Length (I2 = 20 µA)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVariation with Line Current (ICC = 16 mA)
Variation with Line Current (ICC = 7.0 mA)
GPABX
152 175 200 µA/V
∆GPABX
–0.5
–
0.5
dB
∆GPABX1
–0.5
–
0.5
∆GPABX2
–2.0
–
2.0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDISTORTION
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁFrench and U.K.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁFrench
Transmit (I2 = 10–30 µA)
Receive
VE = 700 mV
(I2 = 10 µA)
VE = 1350 mV
THDT
THDR
– – 3.0 %
– – 3.0
– – 5.0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLow Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(MC34216ADW Only)
Transmit (I2 = 10–20 µA)
Receive
VE = 700 mV
(I2 = 20 µA)
VE = 1350 mV
THDT
THDR
– – 3.0 %
– – 3.0
– – 5.0
NOTE: VE is the differential earpiece voltage across Pins 26 and 27.
OTHER ELECTRICAL CHARACTERISTICS (TA = 25°C)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁCharacteristic
Symbol
Min
Typ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLINE CURRENT AGC ( RLS = 25 Ω, G0 = G1 = G2 = 1, VLS = 2.0 Vpp, French, U.K., and LV Masks)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLine Current for which AGC is Active
IAGC(on)
–
–
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVCC with Current AGC “On” (ICC = 13 mA)
VCC AGC VCC – 5.0%
VCC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLine Current for which AGC is Inactive
IAGC(off)
21
–
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPEAK–TO–PEAK AGC (RLS = 25 Ω, C25 = 220 nF, G0 = G1 = G2 = 1, ICC = 40 mA)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDC Level at Pin 28
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAGC “Off”
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAGC “On”
VAGC(off)
VAGC(on)
1.6
1.2
AGC Upper Threshold
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁFrance and U.K.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLow Voltage (MC34216ADW Only)
VLS(up)
VCC – 1.2
0.85
1.7
1.3
VCC – 1.0
1.0
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAGC Lower Threshold
France and U.K.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLow Voltage (MC34216ADW Only)
VLS(low)
VCC – 1.9
0.72
VCC – 1.6
0.85
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1 Step AGC Gain Variation (LSB)
∆AGC
1.0
1.25
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁANTI–HOWLING MONITORING RECEIVE GAIN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInternal Resistor RT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMuted (G2, G1, G0 = 000)
Maximum Gain (G2, G1, G0 = 111)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAttenuation Step
RT000
RT111
∆GLS
–
40
3.5
10
60
4.5
Max
19
–
–
1.8
1.5
–
–
–
–
1.50
18
80
5.5
Unit
mA
Vdc
mA
Vdc
Vrms
Vrms
dB
Ω
kΩ
dB
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page 
MC34216A
AC CHARACTERISTICS
Impedance
In Figure 5, the block diagram of the MC34216A
performing the ac impedance is depicted. As can be seen, it
is partly in common with the dc mask block diagram. The part
generating the dc mask is replaced by a dc voltage source
because for ac, this part has no effect.
Line +
Figure 5. AC Stage of the MC34216A
T2
Transmit
When on Pin LAI a current is injected, via the loop
depicted in Figure 5, a signal is created on the line. In this
way, the microphone signals and DTMF signals from the
internal generator are transmitted. It can be derived that the
signal voltage on the line (Vline) depends on the signal
current injected in LAI (ILAI) according to:
+ )Vline
–ILAI
x
Z0
Zin
x
Zline
Zline
Z0
LAI
Z21
SAO
+ VO1
MC34216A
+ LAO
+ Gnd
VO2
SAI
R1
R5
VCC
T3
+
C7
With this relation, a simplified replacement circuit can be
made for the transmit amplifier (see Figure 7). Here the
product of ILAI and Z0 is replaced by one voltage source.
Figure 7. Replacement Diagram for the
Transmit Amplifier
Zin
+
+
–ILAI*Z0
Vline Zline
Line –
When calculating the ac loop, it can be derived that the set
impedance Zin equals:
+ + ǒ ) Ǔ [Zin
Vline
Iline
R1
1
Z0
Z21
R1
x
Z0
Z21
As can be noticed, the formula for the ac impedance Zin
equals the formula for the dc slope in Regions 1 and 3.
However, because for the dc slopes the resistive part of Z0
and Z21 are used, the actual values for Zin and the dc slopes
do not have to be equal.
A complex impedance can be made by making either Z0
or Z21 complex. When Z0 is made complex to fit the set
impedance, the transmit characteristics will be complex as
well. The complex impedance is therefore preferably made
via the Z21 network. Because Z21 is in the denominator of
the Zin formula, Z21 will not be a direct copy of the required
impedance, but a derivative of it. Figure 6 shows the derived
network to be used for Z21.
Figure 6. Derived Network for Z21 in Case
of Complex Set Impedance
Rv
SAO
Ra
Rv
LAI
Rw
Rb Cb
Cw
–
The microphone signal current is derived from the
microphone signal according to the schematic in Figure 8.
Figure 8. Microphone Amplifier Input Stage
Cmic R Mic
VCC
Handset
Microphone
Ru Cu
Iu
TXI
MIC
MC34216A
Line AGC
RTXI Ku
ILAI
Microphone Threshold
The input stage in Figure 8 consists of a current amplifier
with transfer Ku and impedance RTXI = 1.0 kΩ plus an
attenuator which reduces the signal current at high line
currents, the so–called line length regulated gain or line AGC.
This attenuator can be switched on/off via the microcontroller.
The input current Iu within the telephony speech band is
derived from the microphone signal according to:
+ ) ) [Iu
RMic
Vu
Ru
RTXI
Vu
Ru
+ )Rv
R1 x Z0
2(Ra Rb – R1)
+ )Rw
R1 x Z0 (Ra – R1)
4Rb (Ra Rb – R1)
+Cw
4Rb2 x Cb
R1 x Z0
Gnd
With: Vu = signal of the microphone only loaded with RMic.
The overall gain from microphone to line (ATX) now follows
as:
+ + )ATX
Vline
Vu
Ku
Ru
x
Z0
Zin
x
Zline
Zline
Practically, the gain can only be varied with Z0, Ru and
RMic.
MOTOROLA ANALOG IC DEVICE DATA
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MC34216A.PDF ] | |
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