U4083B-MFPG3 [TEMIC]
Audio Amplifier, PDSO8, SOP-8;
| 型号： | U4083B-MFPG3 |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Audio Amplifier, PDSO8, SOP-8 放大器 光电二极管 商用集成电路 |
| 文件： | 总11页 (文件大小：70K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U4083B
Low-Power Audio Amplifier for Telephone Applications
Description
The integrated circuit, U4083B, is a low-power audio The U4083B has an open loop gain of 80 dB whereas the
amplifier for telephone loudspeakers. It has differential closed loop gain is adjusted with two external resistors.
speaker outputs to maximize the output swing at low A chip disable pin permits powering down and/or muting
supply voltages. There is no need for coupler capacitors. the input signal.
FD eWatidueroepserating voltage range: 2 to 16 V
D Output power, P = 250 mW @ R = 32 W (speaker)
o
L
D Low harmonic distortion (0.5% typical)
D Wide gain range: 0 dB to 46 dB
D Battery-powered application due to low quiescent
supply current: 2.7 mA typical
D Chip disable input to power down the integrated
circuit
Benefits
D Low power-down quiescent current
D Drives a wide range of speaker loads
D Low number of external components
D Low current consumption
Block Diagram / Application Circuit
75 kW
V
S
R
f
0.1mF
6
R
i
4
Amp.1
–
Input
5
VO1
V
i
3 k
W
C
i
+
FC1 3
4 kW
4 kW
C
1
1mF
50 k
W
–
8
5mF
125 k
W
2
VO2
+
Amp.2
C
2
FC2
1
50 k
W
Bias
circuit
CD
7
GND
93 7781 e
Figure 1. Block diagram/ application circuit
Order Information
Extended Type Number
U4083B-MFP
Package
SO8
SO8
Remarks
Tube
Taped and reeled
U4083B-MFPG3
Rev. A4, 06-Mar-01
1 (11)
U4083B
Pin Description
Pins 2 and 3: Filtering,power supply rejection
Power supply rejection is provided by capacitors C and
1
2
3
4
8
7
6
5
CD
VO2
1
C at Pin 3 and Pin 2, respectively. C is dominant at high
2
1
frequencies whereas C is dominant at low frequencies
2
GND
FC2
FC1
(figures 4 to 7). The values of C and C depend on the
1
2
conditions of each application. For example, a line-
powered speakerphone (telephone amplifier) will require
more filtering than a system powered by regulated power
supply.
V
S
V
i
The amount of rejection is a function of the capacitors and
the equivalent impedance at Pin 3 and Pin 2 (see electrical
characteristic equivalent resistance, R).
VO1
94 8022
Figure 2. Pinning
Apart from filtering, capacitors C and C also influence
1
2
the turn-on time of the circuit at power-up since capaci-
tors are charged up through the internal resistors (50 kW
and 125 kW) as shown in the block diagram.
Pin
1
2
3
4
Symbol
CD
FC2
FC1
V
i
Function
Chip disable
Filtering, power supply rejection
Filtering, power supply rejection
Amplifier input
Figure 1 shows turn-on time versus C at V = 6 V, for
2
S
two different C values.
1
5
6
VO1
Amplifier output 1
Voltage supply
Turn-on time is 60% longer when V = 3 V and 20%
S
shorter when V = 9 V.
V
S
S
7
8
GND
VO2
Ground
Amplifier output 2
Turn-off time is less than 10 ms
Pin 4: Amplifier input
V
i
Pin 5: Amplifier output 1 V
Pin 8: Amplifier output 2 V
O1
O2
Functional Description
Including External Circuitry
There are two identical operational amplifiers. Amp.1 has
an open-loop gain w 80 dB at 100 Hz (figure 2), whereas
the closed-loop gain is set by external resistors, R and R
(figure 3). The amplifier is unity gain stable, and has a
f
i
Pin 1: Chip disable * digital input (CD)
Pin 1 (chip disable) is used to power down the IC to con-
serve power or muting or both.
unity gain frequency of approximately 1.5 MHz. A
closed-loop gain of 46 dB is recommended for a
frequency range of 300 to 3400 Hz (voice band). Amp.2
is internally set to a gain of –1.0 (0 dB). The outputs of
both amplifiers are capable of sourcing and sinking a peak
current of 200 mA. Output voltage swing is between 0.4
Input impedance at Pin 1 is typically 90 kW.
Logic 0 < 0.8 V IC enabled (normal operation)
Logic 1 > 2 V
IC disabled
Figure 15 shows the power supply current diagram. The
change in differential gain from normal operation to
muted operation (muting) is more than 70 dB.
V and V – 1.3 V at maximum current (figures 18 and 19).
s
The output dc offset voltage between Pins 5 and 8 (V
O1
– V ) is mainly a function of the feedback resistor, R ,
because the input offset voltage of the two amplifiers
neutralize each other.
O2
f
Switching characteristics are as follows:
turn-on time
t
= 12 to 15 ms
on
turn-off time
t
v 2 ms
off
Bias current of Amp. 1 which is constant with respect to
They are independent of C , C and V .
1
2
S
V , however, flows out of Pin 4 (V ) and through R ,
s
i
f
Voltages at Pins 2 and 3 are supplied from V and there- forcing V to shift negative by an amount equal to R I
S
01
f IB
fore do not change when the U4083B is disabled. Outputs and V positive to an equal amount.
O2
* V (Pin 5) and V (Pin 8) * turn to a high imped-
ance condition by removing the signal from the speaker.
O1
O2
The output offset voltage specified in the electrical char-
acteristics is measured with the feedback resistor
When signals are applied from an external source to the (R = 75 kW) shown in typical application circuit. It takes
f
outputs (disabled), they must not exceed the range into account bias current as well as internal offset voltages
between the supply voltage, V , and ground.
of the amplifiers.
S
2 (11)
Rev. A4, 06-Mar-01
U4083B
Pin 6: Supply and power dissipation
The IC’s operating range is defined by a peak operating
load current of "200 mA (figures 8 to 13). It is further
specified with respect to different loads (see figure 14).
The left (ascending) portion of each of the three curves is
defined by the power level at which 10% distortion
occurs. The center flat portion of each curve is defined by
the maximum output current capability of the integrated
circuit. The right (descending) portion of each curve is
defined by the maximum internal power dissipation of the
IC at 25°C. At higher ambient temperatures, the
maximum load power must be reduced according to the
above mentioned equation.
Power dissipation is shown in figures 8 to 10 for different
loads. Distortion characteristics are given in figures 11 to
13.
Tjmax – Tamb
+
Ptotmax
RthJA
where
T
= Junction temperature = 140°C
= Ambient temperature
jmax
T
amb
R
= Thermal resistance, junction-ambient
thJA
Layout Considerations
Power dissipated within the IC in a given application is
found from the following equation:
Normally, a snubber is not needed at the output of the IC,
unlike many other audio amplifiers. However, the PC
board layout, stray capacitances, and the manner in which
the speaker wires are configured, may dictate otherwise.
Generally, the speaker wires should be twisted tightly, and
be not more than a few cm (or inches) in length.
2
P
tot
= (V I ) + (I
V ) – (R I
)
S
S
RMS
S
L
RMS
I is obtained from figure 15
S
I
is the RMS current at the load R
RMS
L.
Absolute Maximum Ratings
Reference point Pin 7, T
= 25°C unless otherwise specified.
amb
Parameters
Symbol
Value
Unit
V
Supply voltage
Pin 6
V
S
–1.0 to +18
Voltages
Disabled
Pins 1, 2, 3 and 4
Pins 5 and 8
–1.0 to (VS +1.0)
–1.0 to (VS +1.0)
V
V
Output current
Pins 5 and 8
"250
+140
mA
°C
Junction temperature
T
j
Storage temperature range
Ambient temperature range
T
–55 to +150
–20 to +70
440
°C
stg
T
amb
°C
Power dissipation: T
= 60°C
SO8
P
tot
mW
amb
Thermal Resistance
Parameters
Symbol
Value
180
Unit
K/W
Junction ambient
SO8
R
thJA
Operation Recommendation
Parameters
Symbol
Value
2 to 16
8.0 to 100
"200
Unit
V
Supply voltage
Load impedance
Load current
Pin 6
V
S
L
Pins 5 to 8
R
W
I
mA
dB
V
L
Differential gain (5.0 kHz bandwidth)
Voltage @ CD Pin 1
DG
0 to 46
VS
V
CD
Ambient temperature range
T
amb
–20 to +70
°C
Rev. A4, 06-Mar-01
3 (11)
U4083B
Electrical Characteristics
T
amb
= +25°C, reference point Pin 7, unless otherwise specified
Parameters
Test Conditions / Pins
Symbol Min.
Typ.
Max.
Unit
dB
Amplifiers (AC Characteristics)
Open-loop gain
(Amp. 1, f < 100 Hz)
G
VOL1
80
Closed-loop gain (Amp. 2) V = 6.0 V, f = 1.0 kHz, R = 32 W
S
L
G
V2
–0.35
0
+0.35
dB
Gain bandwidth product
Output power
G
1.5
MHz
BW
V = 3.0 V, R = 16 W, d < 10%
Po
55
S
L
V = 6.0 V, R = 32 W, d < 10%
Po
Po
250
400
mW
S
L
V = 12 V, R = 100 W, d < 10%
S
L
Total harmonic distortion
(f = 1.0 kHz)
V = 6.0 V, R = 32 W,
S L
P = 125 mW
d
d
d
0.5
0.5
0.6
1.0
o
V > 3.0 V, R = 8 W,
S
L
P = 20 mW
%
o
V > 12 V, R = 32 W,
S
L
P = 200 mW
o
Power supply rejection
ratio
V = 6.0 V, DV = 3.0 V
S S
C = T, C = 0.01 mF
PSRR
PSRR
50
dB
1
2
C = 0.1 mF, C = 0, f = 1.0 kHz
12
52
1
2
C = 1.0 mF, C = 5.0 mF,
1
2
f = 1.0 kHz
PSRR
Muting
V = 6.0 V, 1.0 kHz < f < 20 kHz,
S
CD = 2.0 V
G
MUTE
>70
dB
Amplifiers (DC Characteristics)
Output DC level at V V = 3.0 V, R = 16 W
,
V
O
V
O
V
O
1.0
1.15
2.65
5.65
1.25
O1
S
L
V
O2
V = 6.0 V
S
V
V
V
R = 75 kW
f
V = 12 V
S
Output high level
I = – 75 mA,
V
V –1
O
OH
S
2.0 V < V < 16 V
S
Output low level
I = 75 mA,
O
V
0.16
OL
2.0 V < V < 16 V
S
Output DC offset voltage
(V – V
V = 6.0 V, R = 75 kW,
S f
R = 32 W
L
)
DV
O
–30
0
+30
200
220
mV
nA
kW
O1
O2
Input bias current at V
V = 6.0 V
S
–I
IB
100
150
i
Equivalent resistance at
Pin 3
V = 6.0 V
S
R
100
18
Equivalent resistance at
Pin 2
V = 6.0 V
S
R
25
40
kW
Chip disable Pin 1
Input voltage * low
Input voltage * high
Input resistance
V
0.8
V
V
kW
IL
V
IH
2.0
50
V = V = 16 V
R
90
65
175
S
CD
CD
Power supply current
V = 3.0 V, R = T, CD = 0.8 V
I
I
I
4.0
5.0
100
mA
mA
mA
S
L
S
S
S
V = 16 V, R = T, CD = 0.8 V
S
L
V = 3.0 V, R = T, CD = 2.0 V
S
L
4 (11)
Rev. A4, 06-Mar-01
U4083B
Typical Temperature Performance
T
amb
= –20 to +70°C
Function
Input bias current at V
Typical Change
Units
"40
pA/ °C
i
Total harmonic distortion
V = 6.0 V, R = 32 W, P = 125 mW,
+ 0.003
%/ °C
S
L
o
f = 1.0 kHz
Power supply current
V = 3.0 V, R = T, CD = 0 V
– 2.5
– 0.03
mA/ °C
mA/ °C
S
L
V = 3.0 V, R = T, CD = 2.0 V
S
L
360
300
40
32
R = 150 kW
R = 6 kW
i
f
C = 5mF
1
R = 75 kW
R = 3 kW
i
f
240
180
120
24
R
f
C
i
Input
R
i
V
O1
16
8
0.1 mF
Amp 1
Amp 2
1 mF
Outputs
V
O2
60
0
V switching from 0 to +6V
S
0
10
100
0
2
4
6
8
0
1
10
C ( mF )
2
Frequency ( kHz )
93 7797 e
94 7838 e
Figure 1. Turn-on time vs. C1, C2 at power on
Figure 3. Differential gain vs. frequency
60
50
40
30
100
99.33
92.67
C w1 mF
1
80
60
40
Phase
C = 0.1 mF
1
86.00
79.33
C = 10 mF
2
Gain
C = 0
1
20
10
20
0
72.67
66.00
1000
100
0.1
1
10
f ( kHz )
100
0.1
1
10
94 7839 e
f ( kHz )
93 7798 e
Figure 2. Amplifier 1 – open-loop gain and phase
Figure 4. Power supply rejection vs. frequency
Rev. A4, 06-Mar-01
5 (11)
U4083B
60
1200
1000
C w1 mF
1
V = 12 V
S
R
L
= 8 W
50
40
C = 0.1 mF
1
800
600
6 V
C = 5 mF
2
30
20
400
200
0
3V
C = 0
1
10
100
0.1
1
10
0
30
60
90
P ( mW )
L
120
150
180
400
600
93 7799 e
f ( kHz )
93 7802 e
Figure 5. Power supply rejection vs. frequency
Figure 8. Device dissipation
60
1200
1000
V = 16 V
S
C w5 mF
1
12 V
50
40
C = 1 mF
1
R
L
= 16 W
800
600
400
C = 1 mF
2
6 V
C = 0.1 mF
1
30
20
3V
200
0
C = 0
1
10
100
0.1
1
10
0
100
200
300
f ( kHz )
P
L
( mW )
93 7800 e
93 7803 e
Figure 6. Power supply rejection vs. frequency
Figure 9. Device dissipation
1200
1000
800
55
V = 16 V
S
12 V
C w5 mF
1
45
35
C = 1 mF
R
= 32 W
1
L
600
C = 0
2
25
400
200
0
6 V
C = 0.1 mF
1
15
5
3V
100
500
0.1
1
10
0
100
200
300
P ( mW )
L
400
93 7801 e
f ( kHz )
93 7804 e
Figure 7. Power supply rejection vs. frequency
Figure 10. Device dissipation
6 (11)
Rev. A4, 06-Mar-01
U4083B
10
8
94 7842
e
V = 3V
V = 3V
f = 1 kHz
V = 6V
S
S
S
L
R
L
= 16W
R
L
= 8W
DG = 34dB
R
= 32W
V
6
4
2
0
V
R
= 16V
= 32W
S
L
V = 6V
S
R
L
= 16W
V
R
= 12V
= 32W
S
L
0
100
200
300
400
P
O
( mW )
Figure 11. Distortion vs. power
10
8
94 7843
e
V = 3V
S
V = 3V
S
f = 3 kHz
V = 6V
S
R
L
= 16W
R
L
= 8W
DG = 34dB
R = 32W
V
L
6
4
2
0
V = 6V
S
R
= 16W
L
V
R
= 16V
S
L
= 32W Limit
V
R
= 12V
= 32W
S
L
0
100
200
300
400
P
O
( mW )
Figure 12. Distortion vs. power
Rev. A4, 06-Mar-01
7 (11)
U4083B
10
94 7844
e
8
6
4
2
V = 3V
V = 3V
f = 1 or 3 kHz
V = 6V
S
R = 32W
L
S
S
R
L
= 16W
R
L
= 8W
DG = 12dB
V
V
R
= 16V
= 32W Limit
V = 6V
S
R = 16W Limit
L
S
L
V
R
= 12V
= 32W
S
L
0
0
100
200
300
400
P
O
( mW )
Figure 13. Distortion vs. power
600
5
T
amb
= 25°C - Derate at higher temperature
R
L
= R
500
400
300
200
4
3
R
L
= 32 W
C
C
= 0
D
16 W
2
1
0
100
0
8 W
= V
D
S
20
20
0
4
8
12
16
0
4
8
12
V ( V )
16
93 7806 e
V ( V )
93 7805 e
S
S
Figure 14. Maximum allowable load power
Figure 15. Power-supply current
8 (11)
Rev. A4, 06-Mar-01
U4083B
1.3
1.2
1.1
1.0
0.9
0.8
2V≤V ≤16V
S
200
0
40
80
120
( mA )
160
20 ms/Div
93 7807 e
93 7809 e
I
L
Figure 16. Smal signal response
Figure 18. VS – VOH vs. load current
2.0
1.6
1.2
V = 2V
S
0.8
0.4
0
V = 3V
S
V ≥ 6V
S
200
0
40
80
120
( mA )
160
20 ms/Div
93 7808 e
93 7810 e
I
L
Figure 17. Large signal response
Figure 19. VOL vs. load current
Rev. A4, 06-Mar-01
9 (11)
U4083B
Package Information
Package SO8
Dimensions in mm
5.2
4.8
5.00
4.85
3.7
1.4
0.25
0.2
0.4
3.8
0.10
1.27
6.15
5.85
3.81
8
5
technical drawings
according to DIN
specifications
13034
1
4
10 (11)
Rev. A4, 06-Mar-01
U4083B
Ozone Depleting Substances Policy Statement
It is the policy of Atmel Germany GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid
their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these
substances.
Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed
in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances
and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended
or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims,
costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death
associated with such unintended or unauthorized use.
Data sheets can also be retrieved from the Internet:
http://www.atmel–wm.com
Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423
Rev. A4, 06-Mar-01
11 (11)
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