Fairchild FAN7000 Low power amplifier Datasheet

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FAN7000D
Low Power Amplifier
Features
Description
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The FAN7000D is a monolithic integrated circuit and
suitable dual amplifier for low power.
Low Quiescent Current
High Power Supply Ripple Rejection
Low Voltage Operation
A few of External Part Required
Built in Power Save Switch & Mute Switch
10-SSOP-225
Typical Applications
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Portable Compact Disk Player (DISCMAN)
Portable Mini Disk Player (MD)
Disc-Man
MP3 Player
CD-ROM
Other Potable Compact Disk Media
Fan Motor Drive
1
Ordering Information
Device
Package
Operating Temp.
FAN7000D
10-SSOP-225
-20°C ~ +75°C
FAN7000DTF
10-SSOP-225
-20°C ~ +75°C
Rev. 1.0.5
©2002 Fairchild Semiconductor Corporation
FAN7000D
Pin Assignments
MUTE
OUTA
GND
OUTB
VCC
10
9
8
7
6
FAN7000D
1
2
3
4
5
PS
INA
GND
INB
REF
Pin Definitions
2
Pin Number
Pin Name
Pin Function Description
1
PS
Power Save Switch
2
INA
Signal Input A
3
GND
Signal Ground
4
INB
Signal Input B
5
REF
Reference Voltage
6
VCC
Supply Voltage
7
OUTB
Signal Output B
8
GND
Power Ground
9
OUTA
Signal Output A
10
MUTE
Mute On Switch
FAN7000D
Internal Block Diagram
PS
1
POWER SAVE SWITCH CTL
MUTE CTL
REF
INA
10
MUTE
9
OUTA
2
8
GND
REF
GND
3
REF
INB
4
REF
5
7
OUTB
6
VCC
REF
3
FAN7000D
Absolute Maximum Ratings (Ta = 25°°C)
Parameter
Maximum Supply Voltage
Symbol
Value
Unit
VCC
4.5
V
Remark
Maximum Supply Voltage
PD
300
mW
Operating Temperature
TOPR
-20 ~ +75
°C
Operating Temperature
Storage Temperature
TSTG
-55 ~ +125
°C
Storage Temperature
Tja
150
°C/W
Power Dissipation
Thermal Resistance
Power Dissipation
-
Power Dissipation Curve
Power dissipation (mW)
300
150
Ambient temperature, Ta (°C)
25
75
125
Recommended Operating Conditions (Ta = 25°°C)
Parameter
Operating Supply Voltage
Recommended Load
4
Symbol
Min.
Typ.
Max.
Unit
VCC
1.8
3.0
4.0
V
RL
16
-
32
Ω
FAN7000D
Electrical Characteristics (RL = 16Ω, Rg = 600Ω, Ta = 25°C)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Quiescent Current 1
ICC1
VCC = 2.4V
-
5.5
10.0
mA
Quiescent Current 2
ICC2
VCC = 4.5V, Mute = GND
-
1.0
2.0
mA
Quiescent Current 3
ICC3
VCC = 4.5V, PS = GND
-
-
1.0
µA
Close Loop Voltage Gain 1
GVC1
VCC = 2.4V, f = 1kHz,
VO = -10dBm
30
32
34
dB
Close Loop Voltage Gain 2
GVC1
VCC = 1.8V, f = 1kHz,
VO = -20dBm
29
32
34
dB
Channel Balance 1
∆GV1
VCC = 2.4V, f = 1kHz,
VO = -10dBm
-
-
1.0
dB
Channel Balance 2
∆GV2
VCC = 1.8V, f = 1kHz,
VO = -20dBm
-
-
1.0
dB
Total Harmonic Distortion
THD
VCC = 2.0V, f = 1kHz,
PO = 1mW
-
1.5
%
0.5
Ripple Rejection Ratio
RR
VCC = 1.8V, f = 100Hz,
Rg = 1kΩ, VR = -20dBm,
BPF = 100Hz
43
60
Crosstalk
CT
VCC = 2.4V, f = 100Hz,
Rg = 1kΩ, VO = -10dB
43
50
VNOISE
VCC = 4.5V, Rg = 1kΩ,
BPF = 20Hz ~ 20kHz
Output Power
POUT
VCC = 3.0V, f = 1kHz,
THD = 10%
PS Attenuation Ratio
ATTPS
MUTE Attenuation Ratio
Output Noise Voltage
-
-
60
dB
100
-
dB
µVrms
20
40
mW
VCC = 1.8V, f = 100Hz,
PS = GND, VIN = -10dB
-
-
-80
dB
ATTMU
VCC = 1.8V, f = 100Hz,
MUTE = GND, VIN = -10dB
-
-
-80
dB
PS ON Input Current
IPSON
VCC = 1.5V, VREF ≥ 0.85V
-
0.2
1.0
µA
MUTE OFF Input Current
IMOFF
VCC = 1.5V, VREF ≥ 0.85V
-
0.2
1.0
µA
PS ON High Level
VHPS
VCC = 1.5V, VREF ≥ 0.85V
0.5
0.65
-
V
MUTE OFF High Level
VHMU
VCC = 1.5V, VREF ≥ 0.85V
0.5
0.65
-
V
5
FAN7000D
Application Information
1. PS Block
This block diagram describes the power save switch circuits.
The drive block is controlled by PS pin, which can be derived from micro controller.
It controls bias of the internal circuits of FAN7000D, so that it makes FAN7000D operate when input voltage level reaches
high level.
2. Mute Block
The block diagram describes the mute on switch circuits.
The drive block is controlled by MUTE pin, which can be derived from micro controller.
When the pin of mute turns on, it makes reference voltage of internal circuits approximately 0V, so that it keeps the device of
FAN7000D off.
3. AMP Block
This block diagram describes the AMP block with resistances, which control gain of FAN7000D.
V
V IN
OUT
≅ 40 ≅ 32 [ dB ]
The gain of FAN7000D is --------------
Output voltage of FAN7000D can be 40 times as much as input voltage, so it eliminates the number of external circuits and
offers headphone input.
4. Popping Noise Reduction
If PS pin (Pin1 , Power save switch) connect the micro controller, the micro controller must follow the same sequence 1 in
order to reduce popping noise on mute mode.
PS on → Mute on → PS off → Mute operation → PS on → Mute off → Normal operation (Sequence 1) If PS connect
VCC, the micro controller follow the sequence 2.
Mute on → Mute Operation → Mute off → Normal operation (Sequence 2)
6
FAN7000D
Test Circuits
I1
I10
1
1
2
PS_SW
1
3
4
1
PS
2
2
INA
V1
3
Rg
GND
1
4
2
22uF
INB
5
Rg
REF
F
A
N
7
0
0
0
D
2
MUTE_SW
10
MUT
E
4
3
220uF
0.1uF
9
RL
OUTA
4.7Ω
Ω
16Ω
V10
8
GND
RL
4.7Ω
Ω
7
16Ω
0.1uF
OUTB
6
220uF
DC
RIPPLE
4.7uF
A
Vcc
7
FAN7000D
Typical Application Circuits
ON
OFF
PS_SW
OFF
1
PS
2
VR
INA
3
4.7uF
GND
4.7uF
VR
4
Sg1
Sg2
22uF
INB
5
REF
8
10
F
A
N
7
0
0
0
D
MUT
E
ON
220uF
0.1uF
9
L-ch
OUTA
4.7Ω
Ω
8
GND
R-ch
4.7Ω
Ω
7
0.1uF
OUTB
6
Vcc
220uF
4.7uF
VDC
FAN7000D
Package Dimensions
10-SSOP-225
9
FAN7000D
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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 2002 Fairchild Semiconductor Corporation
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