MAX4299EWP+
更新时间：2024-09-18 18:23:05
品牌：ROCHESTER
描述：SPECIALTY CONSUMER CIRCUIT, PDSO20, 0.300 INCH, MS-013, SOIC-20
概述
规格参数
数据手册MAX4299EWP+ 概述
SPECIALTY CONSUMER CIRCUIT, PDSO20, 0.300 INCH, MS-013, SOIC-20 其他商用集成电路
MAX4299EWP+ 规格参数
| 是否无铅： | 不含铅 | 是否Rohs认证： | 符合 |
| 生命周期： | Active | 零件包装代码： | SOIC |
| 包装说明： | 0.300 INCH, MS-013, SOIC-20 | 针数： | 20 |
| Reach Compliance Code： | unknown | 风险等级： | 5.63 |
| 商用集成电路类型： | CONSUMER CIRCUIT | JESD-30 代码： | R-PDSO-G20 |
| JESD-609代码： | e3 | 长度： | 12.8 mm |
| 湿度敏感等级： | 1 | 功能数量： | 1 |
| 端子数量： | 20 | 最高工作温度： | 85 °C |
| 最低工作温度： | -40 °C | 封装主体材料： | PLASTIC/EPOXY |
| 封装代码： | SOP | 封装形状： | RECTANGULAR |
| 封装形式： | SMALL OUTLINE | 峰值回流温度（摄氏度）： | 260 |
| 认证状态： | COMMERCIAL | 座面最大高度： | 2.65 mm |
| 最大供电电压 (Vsup)： | 5.5 V | 最小供电电压 (Vsup)： | 4.5 V |
| 表面贴装： | YES | 技术： | BICMOS |
| 温度等级： | INDUSTRIAL | 端子面层： | MATTE TIN |
| 端子形式： | GULL WING | 端子节距： | 1.27 mm |
| 端子位置： | DUAL | 处于峰值回流温度下的最长时间： | NOT SPECIFIED |
| 宽度： | 7.5 mm | Base Number Matches： | 1 |
MAX4299EWP+ 数据手册
通过下载MAX4299EWP+数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。
PDF下载19-1743; Rev 1; 2/01
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX4298 a nd MAX4299 a re a udio syste m ICs
designed for single +5V applications. The MAX4299
fe a ture s a s te re o he a d p hone d rive r, a mic rop hone
amplifier, and a +3.3V linear regulator; the MAX4298
fe a ture s the s te re o he a d p hone d rive r only. The
MAX4298/ MAX4299 are designed specifically for harsh
digital environments where board space is at a premi-
um and the digital power supply is noisy. The design
uses innovative design techniques to achieve ultra-high
power-supply rejection across the audio signal band
while, at the same time, delivering a high-current Rail-
to-Rail® output drive capability. The chip is designed to
drive highly capacitive loads that may be encountered
when driving long cables to a remote load such as
d e s ktop /note b ook he a d p hone s or s p e a ke rs . The s e
devices are fully compliant with PC99 standards.
ꢀ Audio System IC (MAX4299)
Ultra-High PSRR Stereo Headphone Driver
Ultra-High PSRR Microphone Amp
100mA, 3.3V Linear Regulator
ꢀ 93dB typ PSRR at 20kHz Operates Directly from
Noisy Digital Supplies
ꢀ Clickless/Popless Power-Up, Power-Down, Mute
and Unmute
ꢀ PC99-Compliant Output Drivers:
Better than 1V
Output into 16Ω Load and
RMS
1.5V
and 0.0008% THD+N into 10kΩ Load
RMS
ꢀ PC99-Compliant Microphone Amplifier:
0.005% THD+N into 10kΩ Load
ꢀ 22nF Capacitive Load Drive Capability
ꢀ 4.5V to 5.5V Single-Supply Operation
ꢀ Internally Generated Bias Voltage
ꢀ All Gains Externally Adjustable
The amplifiers exhibit 115dB of DC power-supply rejec-
tion and 80dB at 100kHz. The output amplifiers are
capable of driving a 1.5V
signal into a 10kΩ load
RMS
with 0.0008% THD+N. They can also drive 32Ω head-
phones to 1.2V with 0.02% distortion. At +3.3V, the
ꢀ Available in Space-Saving Packages
10-Pin µMAX (MAX4298)
RMS
line a r re g ula tor c a n outp ut 100mA of c urre nt. The
MAX4298 is available in a tiny 10-pin µMAX while the
MAX4299 is a va ila b le in the s p a c e -s a ving 16-p in
TSSOP package.
16-Pin TSSOP (MAX4299)
Ord e rin g In fo rm a t io n
________________________Ap p lic a t io n s
Notebook and Desktop Audio
Hands-Free Headsets
PART
TEMP. RANGE
-40ºC to +85°C
-40ºC to +85°C
-40ºC to +85°C
-40ºC to +85°C
PIN-PACKAGE
10 µMAX
14 SO
MAX4298EUB
MAX4298ESD
MAX4299EWP
MAX4299EUE
USB Audio Peripherals
IP Telephones
20 SO
Wireless Internet Devices
MP3 Players/Recorders
16 TSSOP
Typical Operating Circuit appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
P S RR vs . Fre q u e n c y
P in Co n fig u ra t io n s
-50
-60
TOP VIEW
-70
-80
OUT1
GND
IN1
1
2
3
4
5
10
9
V
CC
-90
OUT2
IN2
-100
MAX4298
8
-110
-120
-130
BIAS
7
C
BYPASS
SV
CC
6
MUTE
-140
-150
µMAX
100
1k
10k
100k
Pin Configurations continued at end of data sheet.
FREQUENCY (Hz)
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V ) to GND ...............................................+6V
Continuous Power Dissipation
CC
Standby Supply Voltage (SV ) to GND...............................+6V
CC
REG, FB, REGON to GND..........................-0.3V to (V + 0.3V)
CC
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
14-Pin SO (derate 8.3mW/°C above +70°C)................667mW
20-Pin SO (derate 10.0mW/°C above +70°C)..............800mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C) .........755mW
Operating Temperature Range ..........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
BIAS, C
, MUTE, IN_, MICIN to GND ..............-0.3V to the
Larger of (V +0.3V) or (SV +0.3V)
BYPASS
CC
CC
OUT_, MICOUT to GND................................-0.3V to the Smaller
of +5.5V, or (V + 0.3V)
CC
Duration of Output Short-Circuit to GND or V ................10min
CC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V = SV = +5V, R = ∞ on all outputs, C
= 1µF, C
= 1µF, C
= 10µF (MAX4299), T = T
to T , unless other-
MAX
CC
CC
L
BYPASS
BIAS
REG
A
MIN
wise noted. Load resistors (R ) are terminated to 2.25V. Typical values are at T = +25°C. Specifications apply to both MAX4298 and
L
A
MAX4299, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Inferred from PSRR test
MIN
TYP
MAX UNITS
Supply Voltage Range
V
CC
4.5
5.5
V
MAX4298
MAX4299
MAX4298
MAX4299
10.2
10.6
10.2
10.6
300
7
17.5
18.0
17.5
18.0
500
Quiescent Current
I
mA
CC
Mute Quiescent Current
mA
V
BIAS
= 1.125V, V = 0
CC
SV Current (Note 2)
CC
I
µA
SVCC
V
BIAS
= 2.25V, V = 5.0V
CC
DRIVER AMPLIFIERS
Input Offset Voltage
Input Bias Current
V
±1
0.2
±10
mV
nA
OS
I
BIAS
DC, V = 4.5V to 5.5V
CC
115
93
Power-Supply Rejection
Ratio
PSRR
f = 20kHz
dB
f = 100kHz
80
R = 10kΩ
1.45
1.2
1.59
1.53
1.48
L
Output Drive
V
OUT
V
RMS
R = 32Ω
L
R = 16Ω
L
1.0
A = -1V/V, f = 1kHz, R = 10kΩ,
V
L
0.0008
0.02
V
OUT
= 1.5V
RMS
A = -1V/V, f = 1kHz, R = 32Ω,
V
L
THD + Noise
0.1
%
V
OUT
= 1.2V
, (Notes 3, 4)
RMS
A = -1V/V, f = 1kHz, R = 16Ω,
V
L
0.04
V
= 1.0V
RMS
OUT
Full-Scale Signal-to-Noise Ratio
(Note 4)
R = 10kΩ,
L
SNR
105
dB
V
= 1.06V
, A = -1V/V
RMS V
OUT
Capacitive Drive
22
87
nF
dB
Open-Loop Voltage Gain
Unity-Gain Bandwidth
A
R = 32Ω, 0.55V ≤ V
≤ V - 0.55V
76
VOL
L
OUT
CC
GBW
1.3
MHz
2
_______________________________________________________________________________________
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
ELECTRICAL CHARACTERISTICS (continued)
(V = SV = +5V, R = ∞ on all outputs, C
= 1µF, C
= 1µF, C
= 10µF (MAX4299), T = T
to T , unless other-
MAX
CC
CC
L
BYPASS
BIAS
REG
A
MIN
wise noted. Load resistors (R ) are terminated to 2.25V. Typical values are at T = +25°C. Specifications apply to both MAX4298 and
L
A
MAX4299, unless otherwise noted.) (Note 1)
PARAMETER
BIAS VOLTAGE OUTPUT
DC BIAS Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
V
BIAS
I = 0
2.13
2.25
120
50
2.37
V
L
Line Regulation
dB
mV
Load Regulation
I = 0 to 1µA
L
DIGITAL INPUTS (MUTE for MAX4298/MAX4299, and REG
for MAX4299)
ON
Input Voltage High
Input Voltage Low
Input Leakage Current
V
2.4
V
V
INH
V
INL
0.8
I
V
V
±1
µA
IN
IN = 0 or CC
MICROPHONE AMPLIFIER (MAX4299 only)
Input Offset Voltage
Input Bias Current
V
±2
0.2
±10
mV
nA
OS
IBIAS
DC, V = 4.5V to 5.5V
CC
115
93
Power-Supply Rejection Ratio
PSRR
dB
f = 20kHz
f = 100kHz
80
Voltage Gain
Output Drive
A
R = 10kΩ, 0.13V ≤ V
≤ V - 0.13V
80
100
1.58
0.005
0.03
dB
VOL
L
MICOUT
CC
V
OUT
R = 10kΩ
L
1.4
V
RMS
A = -1V/V
V
f = 1kHz, R = 10kΩ,
L
THD + Noise (Note 4)
THD+N
SNR
%
V
= 1.5V
RMS
MICOUT
A = -10V/V
V
Full-Scale Signal-to-Noise Ratio
(Note 4)
R = 10kΩ, V
= 1.06V
, A = -10V/V
V
80
dB
L
MICOUT
RMS
All-Hostile Crosstalk
f = 10kHz (Note 5)
80
1
dB
Unity Gain Bandwidth
GBW
MHz
REGULATOR (MAX4299 only)
V
= 4.5V to 5.5V. I = 0 to 100mA, using
L
CC
Regulator Output Voltage
Line Regulation
Load Regulation
FB Voltage
V
3.15
3.3
3.45
V
REG
internal feedback
V
CC
= 4.5V to 5.5V, I = 50mA
0.2
30
mV
mV
mV
V
L
I = 10mA to 100mA
L
I = 0 to 100mA
L
50
V
Reference for regulator adjustment
1.233
FB
Note 1: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 2: Current drawn from SV when V < 4V.
CC
CC
Note 3: Guaranteed by design.
Note 4: Measurement bandwidth is 20Hz to 22kHz.
Note 5: Voltage at MICOUT with OUT1 = OUT2 = 1V
into 32Ω.
RMS
_______________________________________________________________________________________
3
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V = SV = +5V, typical operating circuit, T = +25°C, unless otherwise noted.)
CC
CC
A
MAX4298
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MUTE PERFORMANCE
POWER-UP/POWER-DOWN
11.5
2.5
2.0
1.5
1.0
0.5
0
4
3
OUT
R = 32Ω
L
11.0
10.5
10.0
9.5
T = +85°C
A
OUT
2
1
T = +25°C
A
SPEAKER
0
T = -40°C
A
9.0
-1
-2
R = 32Ω
L
SPEAKER
1.0
C
AC
= 220µF
8.5
-0.5
4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6
0
0.5
1.5
2.0
0
1.0
2.0
V
CC
(V)
TIME (s)
TIME (s)
DRIVER OUT
THD+N vs. FREQUENCY
POWER-DOWN/POWER-UP with SCHOTTKY
DIODE AND RESERVOIR CAPACITOR
DRIVER OUT
THD+N vs. FREQUENCY
1
0.1
1
0.1
6
5
V
CC
= 5V
V
CC
= 0
SV
CC
4
BW = 80kHz
BW = 22kHz
3
0.01
0.01
BW = 80kHz
BW = 22kHz
2
V
OUT
1
0.001
0.001
R = 10kΩ
L
R = 32Ω
L
0
A = -1
A = -1
R = 32Ω
V
V
L
V
= 1.5V
V
= 1.2V
C
= 22OµF
OUT
RMS
OUT RMS
AC
-1
0.0001
0.0001
100
1k
10k
100k
100
1k
10k
100k
0
0.5
1.0
TIME (s)
1.5
2.0
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
DRIVER OUT
THD+N vs. FREQUENCY
DRIVER OUT
THD+N vs. AMPLITUDE
DRIVER OUT
THD+N vs. AMPLITUDE
1
0.1
10
1
10
1
BW = 22kHz
BW = 22kHz
BW = 80kHz
BW = 22kHz
f
IN
= 1kHz
0.1
0.01
0.1
0.01
0.01
0.001
R = 16Ω
L
0.001
0.001
A = -1
A = -1
R = 10kΩ
L
R = 32Ω
A = -1
V
V
V
L
f
IN
= 1kHz
V
= 1V
RMS
OUT
0.0001
0.0001
0.0001
100
1k
10k
100k
0
0.5
1
1.5
2
0
0.5
1
1.5
2
INPUT FREQUENCY (Hz)
OUTPUT VOLTAGE (V
)
OUTPUT VOLTAGE (V
)
RMS
RMS
4
_______________________________________________________________________________________
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = SV = +5V, typical operating circuit, T = +25°C, unless otherwise noted.)
CC
CC
A
DRIVER OUT
CHANNEL SEPARATION
vs. INPUT FREQUENCY
DRIVER OUT
MUTED OUTPUT ATTENUATION
vs. INPUT FREQUENCY
DRIVER OUT
THD+N vs. AMPLITUDE
-60
-70
10
1
-80
BW = 22kHz
-85
-90
OUT2 TO OUT1
B
-80
f
= 1kHz
IN
-95
C
A
0.1
0.01
-90
-100
-105
-110
-100
-110
-120
OUT1 TO OUT2
R = 10kΩ
R = 16Ω
L
L
0.001
A = R = 20kΩ, R = 20kΩ
I
F
A = -1
V
R = 16Ω
A = -1
V
B = R = 10kΩ, R = 10kΩ
L
-115
-120
I
F
V
OUT
= 1V
RMS
C = R = 10kΩ, R = 20kΩ
I
F
0.0001
100
1k
10k
100k
0
0.5
1
1.5
2
100
1k
10k
100k
INPUT FREQUENCY (Hz)
OUTPUT VOLTAGE (V
)
INPUT FREQUENCY (Hz)
RMS
DRIVER OUT
POWER-SUPPLY REJECTION
RATIO vs. FREQUENCY
DRIVER OUT
OPEN-LOOP FREQUENCY RESPONSE
DRIVER OUT
OPEN-LOOP FREQUENCY RESPONSE
MAX4298/9-15
MAX4298/9-14
90
200
180
160
140
120
100
80
90
200
180
160
140
120
100
80
-50
-60
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
-70
-80
PHASE
PHASE
-90
-100
-110
-120
-130
60
60
GAIN
GAIN
40
40
20
20
-140
-150
32Ω || 1.5nF
32Ω || 15pF
-10
0.01
0
-10
0.01
0
0.1
1
10
100 1000 10,000
0.1
1
10
100 1000 10,000
100
1k
10k
100k
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
FREQUENCY (Hz)
DRIVER OUT
DRIVER OUT
DRIVER OUT
OPEN-LOOP FREQUENCY RESPONSE
OPEN-LOOP FREQUENCY RESPONSE
OPEN-LOOP FREQUENCY RESPONSE
MAX4298/9-17
MAX4298/9-18
MAX4298/9-16
90
80
70
60
50
40
30
20
10
0
200
180
160
140
120
100
80
90
80
70
60
50
40
30
20
10
0
200
180
160
140
120
100
80
90
80
70
60
50
40
30
20
10
0
200
180
160
140
120
100
80
PHASE
PHASE
PHASE
60
60
60
GAIN
GAIN
GAIN
40
40
40
20
20
20
10kΩ || 15pF
10kΩ || 1.5nF
32kΩ || 22nF
-10
0
-10
0
-10
0
0.01
0.1
1
10
100 1000 10,000
0.01
0.1
1
10
100 1000 10,000
0.01
0.1
1
10
100 1000 10,000
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
_______________________________________________________________________________________
5
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = SV = +5V, typical operating circuit, T = +25°C, unless otherwise noted.)
CC
CC
A
DRIVER OUT
OPEN-LOOP FREQUENCY RESPONSE
MICOUT OPEN LOOP
MICOUT ALL HOSTILE CROSSTLAK
(INPUT REFERRED)
FREQUENCY RESPONSE
MAX4298/99 toc21
MAX4298/99 toc19
90
80
70
60
-20
-40
-60
-80
200
180
160
140
120
100
80
90
80
70
60
50
40
30
20
10
0
200
180
160
140
120
100
80
A = -100
V
50
40
PHASE
PHASE
30
20
60
60
GAIN
GAIN
40
40
-100
-120
10
20
20
0
10kΩ || 22nF
10kΩ || 15pF
0.1
0
-10
0.01
0
-10
0.01
1
10
100 1000 10,000
0.1
1
10
100 1000 10,000
0.01
0.1
1
10
100
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
MICOUT
THD+N vs. AMPLITUDE
MICOUT OPEN LOOP
REGOUT OUTPUT VOLTAGE
vs. LOAD CURRENT
FREQUENCY RESPONSE
MAX4298/99 toc22
10
90
80
70
60
50
40
200
180
160
140
120
3.5
3.4
3.3
3.2
3.1
3.0
1
0.1
100
80
PHASE
30
20
0.01
60
GAIN
R = 10kΩ
L
40
20
0
10
A = -1
0.001
V
f
IN
= 1kHz
0
BW = 22kHz
10kΩ || 150pF
0.0001
-10
0.01
2.0
0
0.5
1.0
1.5
0.1
1
10
100 1000 10,000
0
20
40
60
80
100
AMPLITUDE (V
)
INPUT FREQUENCY (kHz)
RMS
LOAD CURRENT (mA)
REGOUT TRANSIENT RESPONSE
REGOUT TRANSIENT RESPONSE
MAX4298/99 toc25
MAX4298/99 toc26
V
OUT
30mV/div
V
OUT
30mV/div
100mA
100mA
I
L
I
L
0
10mA
200µs/div
200µs/div
6
_______________________________________________________________________________________
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
P in De s c rip t io n
PIN
MAX4299
20-PIN SO
MAX4298
MAX4298
14-PIN SO
MAX4299
NAME
FUNCTION
10-PIN
µMAX
16-PIN
TSSOP
Regulator Output. Bypass REG to GND with a 10µF
capacitor.
—
—
—
—
16
1
2
REG
FB
Regulator Feedback. Internal resistors from this point
to REG and GND define the regulator output value.
Adjustments can be made to the output value by
adding resistors in the same place externally.
1
4
5
6
7
1
—
2
2
—
3
2
3
4
5
OUT1
PGND
GND
IN1
Driver Amplifier Output
Power Ground for Driver Outputs
Ground
3
4
Inverting Input for Driver Amplifier
Bias Point for Amplifiers. Bypass BIAS to GND with a
1µF capacitor.
4
5
5
6
6
8
BIAS
Standby Power Supply. Connect to a standby +5V
supply that is always on, or bypass with 220µF and
7
9
SV
CC
connect a Schottky diode from V to SV . Short to
CC
CC
V
CC
if clickless power-down is not essential.
10
11
—
—
—
—
8
9
MICOUT
MICIN
Microphone Amplifier Output
Inverting Input for Microphone Amplifier
Mute Digital Input. Connect to GND for normal
operation. When MUTE is connected to V , OUT1
CC
and OUT2 are muted, REG stays on, and MICOUT
stays on.
6
9
10
13
MUTE
14
7
8
10
11
11
12
13
14
—
C
Bypass to GND with a 1µF Capacitor
Inverting Input for Driver Amplifier
Driver Amplifier Output
BYPASS
IN2
15
16
17
9
12
OUT2
10
—
13
V
CC
Power Supply. Connect to +5V.
No Connection. Not internally connected.
3, 12, 18, 19
1, 7, 8, 14
N.C.
Regulator Control. Connect to V for normal
CC
operation. Connect to GND to shut off the regulator.
—
—
15
20
REGON
powe r supply is noisy. The de sign use s innova tive
design techniques to achieve ultra-high power-supply
rejection across the audio signal band while, at the
same time, delivering a high current rail-to-rail output
drive capability. These devices are designed to drive
highly capacitive loads that may be encountered when
d riving long c a b le s to a re mote loa d s uc h a s
desktop/notebook headphones or speakers. They are
fully c omp lia nt to PC99 s ta nd a rd s . Fig ure 1 is the
De t a ile d De s c rip t io n
The MAX4298/MAX4299 a re a ud io s ys te m ICs d e -
signed for single +5V applications. The MAX4299 has a
stereo headphone driver, a microphone amplifier, and
a 100mA +3.3V linear regulator; the MAX4298 has the
stereo headphone driver only. The MAX4298/MAX4299
are designed specifically for harsh digital environments
where board space is at a premium and the digital
_______________________________________________________________________________________
7
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
V
CC
V
CC
+
_
1.233V
REG
FB
SV
CC
MAX4298
SV
CC
18.4kΩ
11kΩ
REGON
_
OUT1
IN1
+
50kΩ
BIAS
IN2
MUTE
2.25V
MAX4299
+
_
OUT2
GND
_
OUT1
IN1
+
C
BYPASS
BIAS
2.25V
50kΩ
+
_
OUT2
N.C.
IN2
Figure 1. MAX4298 Block Diagram
MUTE
MAX4298 block diagram and Figure 2 is the MAX4299
block diagram.
The amplifiers exhibit better than 115dB of DC power-
supply rejection and 93dB at 20kHz. The output ampli-
+
_
MICOUT
MICIN
GND
C
BYPASS
PGND
fiers are capable of driving a 1.5V
signal into 10kΩ
RMS
load with 0.0008% distortion. They can also drive 32Ω
Figure 2. MAX4299 Block Diagram
he a d p hone s to 1.2V
with 0.02% d is tortion. At
RMS
+3.3V, the linear regulator can output 100mA of current.
BIAS
and OUT2 are muted, but remain in a low-impedance
state to ensure clickless/popless operation.
The common-mode bias point for the amplifiers is set to
2.25V by internal circuitry that has two functions. It pro-
vides a clickless/popless power-up/power-down wave-
form for the amplifiers. Also, it generates a ground-
referenced bias voltage with ultra-high power-supply
rejection ratio (PSRR). BIAS should be bypassed with 1µF
to GND.The output impedance of the BIAS pin is 50kΩ.
SV
CC
The MAX4298/MAX4299 provide a fully clickless power-
down sequence. SV can either be connected to a low-
CC
c urre nt + 5V p owe r s ourc e or a lte rna tive ly c a n b e
connected with a reservoir capacitor to ground and a
Schottky diode to V . A reservoir capacitor of 220µF or
CC
Clic kle s s /Pople s s Func tion
higher provides enough charge for the clickless power-
down sequence when C
= 1µF. For larger values of
BIAS
The MAX4298/MAX4299 are designed for high-fidelity
audio performance into AC-coupled loads. Patented
design techniques achieve a clickless/popless power-up
sequence, and the use of a low-current standby supply
C
, increase the reservoir capacitor accordingly.
BIAS
Short to V if clickless power-down is not needed.
CC
Drive r Am p lifie r
(SV ) or external Schottky diode/reservoir capacitor
CC
The headphone driver amplifier is a class AB amplifier
designed to drive 16Ω loads. The amplifiers have innov-
ative architectures for both the input and output stages
to achieve ultra-high PSRR while maintaining rail-to-rail
output drive capability. The output stage can drive high
capacitive loads encountered when driving long cables
used for desktop speakers or headphones.
combination allows clickless/popless power-down. A
clickless/popless mute function is also provided to main-
tain a low impedance output when the input signal is
switched off.
Mute Func tion
The MAX4298/MAX4299 have a MUTE pin that allows the
user to mute the outputs of the device. This feature dis-
connects the input signal from the power amplifiers when
a logic high is present at the MUTE pin. To ensure proper
functionality, the MUTE pin should always be tied to either
Mic ro p h o n e P re a m p lifie r (MAX4 2 9 9 )
The MAX4299 provides a microphone preamplifier that
is a low-power version of the audio amplifier. It is intend-
ed to be used for low-level signal amplification. This
microphone preamplifier provides rail-to-rail output with
very high PSRR.
V
or GND. MUTE only affects the headphone driver
CC
outputs. REG, BIAS, and MICOUT are unaffected. OUT1
8
_______________________________________________________________________________________
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
Re g u la t o r (MAX4 2 9 9 )
La yo u t
The MAX4299 a ls o ha s a n a d d itiona l 100mA low-
dropout (LDO) regulator to provide clean analog power
for other sensitive analog circuitry on the PC board,
such as a typical PC99 audio codec or microphone
biasing. It is designed to provide good AC line regula-
tion. The nominal output voltage of REG is 3.3V, and is
adjustable between 1.2V and 4.5V by connecting a
resistor-divider from REG to GND. Connect FB to the
junction of the resistor-divider. The input impedance at
FB is typically 7kΩ, which should be considered in out-
put voltage calculations. REG should be bypassed to
GND with at least 10µF.
Good layout improves performance by decreasing the
amount of stray capacitance and noise at the power
amplifier’s inputs and output. To decrease stray capaci-
tance, minimize PC board trace lengths and resistor
leads, and place external components as close to the
pins as possible.
P o w e r Dis s ip a t io n
The first equation below indicates the maximum power
dissipation point for a package that has two power
amplifiers operating at identical known supply voltages
and loads with sine wave inputs:
P
= (V )2 / (π2R ) [W]
IC(DISS)
CC L
Ap p lic a t io n s In fo rm a t io n
For example, with a 5V power supply and a load of 16Ω,
the maximum power dissipation of the amplifiers alone
is 317mW.
Ca p a c it o r S e le c t io n a n d
Re g u la t o r S t a b ilit y
Normally, use a 10µF capacitor on REG (MAX4299 only)
The additional power dissipation due to the 100mA reg-
ula tor op e ra ting a t ma ximum c urre nt is nomina lly
170mW, but will increase if the output is reduced exter-
nally from its nominal 3.3V. The regulator power con-
sumption is given by:
and a 1µF capacitor on C
. Larger capacitor val-
BYPASS
ues and lower ESRs provide better supply-noise rejec-
tion and line-transient response. Reduce noise and
improve load-transient response, stability, and power-
supply rejection by using larger capacitors. For stable
operation over the full temperature range and load cur-
rents up to 100mA, a minimum of 10µF (REG) and 1µF
P
= (V - V
) x 100mA [W]
REG
CC
REG
To avoid thermal shutdown the sum of the regulator and
amplifier power dissipation must not exceed the absolute
maximum power-dissipation rating of the package.
(C
) is recommended.
BYPASS
Use a 1µF bypass capacitor on BIAS to ensure a fully
clickless/popless power-up sequence. Smaller capacitor
values may be used here to decrease the power-up
time, but may cause the power-up transient to become
audible. Larger bypass capacitors are not necessary to
reduce noise and/or improve AC power-supply rejection.
S h o rt -Circ u it P ro t e c t io n a n d
Th e rm a l S h u t d o w n
The MAX4298/MAX4299 have short-circuit current pro-
tection on all outputs. They also have a thermal shut-
down function designed to protect the chip from junction
temperatures in excess of +150°C that may arise from
temporary short circuits or operation beyond the power
dissipation limit of the package. The driver amplifier out-
puts limit at around ±220mA, the regulator at 150mA,
and the microphone amplifier at +1.5mA/-12mA.
SV is the standby power supply. If using an external
CC
diode for charging, a 220µF reservoir capacitor on
SV
provides standby power for the clickless power-
CC
down sequence. Smaller capacitors here may cause an
audible output transient on power-down; 220µF or high-
er provides enough energy when C
= 1µF. For larg-
BIAS
US B Ap p lic a t io n s
er values of C
accordingly.
, increase the reservoir capacitor
BIAS
Universal serial bus (USB) interfaces are an increasingly
popular method of interfacing medium-speed (up to
12Mbps) PC peripherals. One of the great benefits of
the USB interface is the inclusion of a +5V supply. While
this supply works well for a mouse or keyboard, its sus-
ceptibility for noise pickup can be unsuitable for high-
fidelity audio applications. The MAX4298/MAX4299s’
excellent PSRR make them ideal candidates for USB
applications due to their insensitivity to the supply noise.
Mic Bia s in g (MAX4 2 9 9 )
Common microphone elements require resistive biasing
to power their internal circuitry. A 2kΩ resistor is typical-
ly us e d , a nd the mic rop hone is AC-c oup le d to the
microphone amplifier. If the microphone element allows
low-voltage operation, biasing to the REG output pro-
vides excellent power-supply rejection.
Of particular interest is an Internet-Protocol (IP) phone.
This PC p e rip he ra l us e s the loc a l inte rne t s e rvic e
provider as a free long-distance phone. The MAX4299,
with its integral microphone amp, headphone driver,
and linear regulator, can be a key element in the imple-
me nta tion of a n IP phone tha t inte rfa c e s to the PC
through the USB.
P o w e r S u p p ly a n d Byp a s s in g
The excellent PSRR of the MAX4298/MAX4299 allows
them to operate from noisy power supplies. In most
applications, a 0.1µF capacitor from V to GND is suf-
CC
ficient. This bypass capacitor should be placed close
to the V pin.
CC
_______________________________________________________________________________________
9
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
Typ ic a l Op e ra t in g Circ u it s
R
F
10kΩ
V
CC
OPTIONAL
V
CC
MAX4298
SV
CC
220µF
R
10kΩ
I
LEFT
_
+
OUT1
IN1
V
CC
C
MUTE
AC
220µF
BIAS
2.25V
1µF
RIGHT
R
I
+
_
OUT2
GND
10kΩ
IN2
C
AC
220µF
C
BYPASS
1µF
R
F
10kΩ
20kΩ
V
CC
REGON
10µF
OPTIONAL
AV
DD
3.3V
REG
FB
V
CC
LDO
SV
CC
MAX4299
220µF
C
AC
220µF
_
+
OUT
IN1
LEFT
V
CC
AUDIO
CODEC
20kΩ
0.33µF
MUTE
BIAS
2.25V
1µF
+
_
AV
DD
OUT2
IN2
RIGHT
C
220µF
AC
20kΩ
0.33µF
MIC
RBIAS
+
_
MICOUT
MICIN
GND
ELECTRET
MIC
C
BYPASS
20kΩ 0.33µF
1µF
PGND
20kΩ
200kΩ
10 ______________________________________________________________________________________
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
P in Co n fig u ra t io n s (c o n t in u e d )
TOP VIEW
REG
FB
1
2
3
4
5
6
7
8
9
20 REGON
19 N.C.
FB
OUT1
PGND
GND
IN1
1
2
3
4
5
6
7
8
16 REG
N.C.
OUT1
GND
IN1
1
2
3
4
5
6
7
14 N.C.
13
15 REGON
V
CC
N.C.
18 N.C.
14
V
CC
12 OUT2
11 IN2
OUT1
PGND
GND
IN1
17 V
CC
MAX4299
13 OUT2
12 IN2
MAX4298
MAX4299
16 OUT2
15 IN2
BIAS
10
9
C
BYPASS
BIAS
11
10 MUTE
MICIN
C
BYPASS
SV
CC
MUTE
N.C.
14
C
SV
CC
BYPASS
N.C.
8
BIAS
13 MUTE
12 N.C.
MICOUT
9
SO
SV
CC
TSSOP
MICOUT 10
11 MICIN
WIDE SO
Ch ip In fo rm a t io n
MAX4298 TRANSISTOR COUNT: 760
MAX4299 TRANSISTOR COUNT: 905
PROCESS: BiCMOS
P a c k a g e In fo rm a t io n
______________________________________________________________________________________ 11
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
P a c k a g e In fo rm a t io n (c o n t in u e d )
12 ______________________________________________________________________________________
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
P a c k a g e In fo rm a t io n (c o n t in u e d )
______________________________________________________________________________________ 13
Ult ra -Hig h P S RR S t e re o Drive rs +
Mic ro p h o n e Am p + 1 0 0 m A Lin e a r Re g u la t o r
P a c k a g e In fo rm a t io n (c o n t in u e d )
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4299EWP+ 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| MAX4299EWP-T | MAXIM | Consumer Circuit, BICMOS, PDSO20, 0.300 INCH, MS-013AC, SOIC-20 | 获取价格 |
|
| MAX430 | MAXIM | 【15V Chopper-Stabilized Operational Amplifier | 获取价格 |
|
| MAX430-MAX432 | MAXIM | 【15V Chopper-Stabilized Operational Amplifier | 获取价格 |
|
| MAX430/432 | MAXIM | 15V Chopper-Stabilized Operational Amplifier | 获取价格 |
|
| MAX4304 | MAXIM | 740MHz, Low-Noise, Low-Distortion Op Amps in SOT23-5 | 获取价格 |
|
| MAX4304 | ADI | 740MHz、低噪声、低失真运算放大器，SOT23-5封装 | 获取价格 |
|
| MAX4304ESA | MAXIM | Voltage-Feedback Operational Amplifier | 获取价格 |
|
| MAX4304ESA+ | MAXIM | Operational Amplifier, 1 Func, 6000uV Offset-Max, PDSO8, SOP-8 | 获取价格 |
|
| MAX4304ESA-T | MAXIM | Operational Amplifier, 1 Func, 6000uV Offset-Max, PDSO8, SOP-8 | 获取价格 |
|
| MAX4304EUK+T | MAXIM | Operational Amplifier, 1 Func, 8000uV Offset-Max, PDSO5, ROHS COMPLIANT, SOT-23, 5 PIN | 获取价格 |
|
MAX4299EWP+ 相关文章
Bourns 密封通孔金属陶瓷微调电位计产品选型手册(英文版)
- 2024-09-20
- 6
Bourns 精密环境传感器产品选型手册(英文版)
- 2024-09-20
- 9
Bourns POWrTher 负温度系数(NTC)热敏电阻手册 (英文版)
- 2024-09-20
- 8
Bourns GMOV 混合过压保护组件产品选型手册(英文版)
- 2024-09-20
- 6
