|
|
PDF MAX4338 Data sheet ( Hoja de datos )
| Número de pieza | MAX4338 | |
| Descripción | SC70/SOT23-8 / 50mA IOUT / Rail-to-Rail I/O Op Amps with Shutdown/Mute | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX4338 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
19-2136; Rev 1; 9/01
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
General Description
The MAX4335–MAX4338 op amps deliver 40mW per
channel into 32Ω from ultra-small SC70/SOT23 pack-
ages making them ideal for mono/stereo headphone
drivers in portable applications. These amplifiers have
a 5MHz gain-bandwidth product and are guaranteed to
deliver 50mA of output current while operating from a
single supply of 2.7V to 5.5V.
The MAX4336 and the MAX4338 have a shutdown/mute
mode that reduces the supply current to 0.04µA per
amplifier and places the outputs in a high-impedance
state.
The MAX4335–MAX4338 have 90dB power-supply
rejection ratio (PSRR), eliminating the need for costly
pre-regulation in most audio applications. Both the
input voltage range and the output voltage swing
include both supply rails, maximizing dynamic range.
The MAX4335/MAX4336 single amplifiers are available
in ultra-small 6-pin SC70 packages. The MAX4337/
MAX4338 dual amplifiers are available in an 8-pin
SOT23 and a 10-pin µMAX package, respectively. All
devices are specified from -40°C to +85°C.
________________________Applications
32Ω Headphone Drivers
Portable/Battery-Powered Instruments
Wireless PA Control
Hands-Free Car Phones
Transformer/Line Drivers
DAC/ADC Buffers
Typical Operating Circuit
VCC
R3
C1
VIN
R4
MAX4335
MAX4336
C2
Features
o 50mA Output Drive Capability
o Low 0.003% THD (20kHz into 10kΩ)
o Rail-to-Rail® Inputs and Outputs
o 2.7V to 5.5V Single-Supply Operation
o 5MHz Gain-Bandwidth Product
o 95dB Large-Signal Voltage Gain
o 90dB Power-Supply Rejection Ratio
o No Phase Reversal for Overdrive Inputs
o Ultra-Low Power Shutdown/Mute Mode
Reduces Supply Current to 0.04µA
Places Output in High-Impedance State
o Thermal Overload Protection
Ordering Information
PART
MAX4335EXT-T
MAX4336EXT-T
MAX4337EKA-T
MAX4337EUA
MAX4338EUB
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
6 SC70-6
6 SC70-6
8 SOT23-8
8 µMAX
10 µMAX
Pin Configurations appear at end of data sheet.
TOP
MARK
AAX
AAW
AAIK
—
—
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
0.005
RL = 10kΩ,
VCC = 5V
VOUT = 2VP-P
0.004
R2
R1
32Ω
0.003
C3
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
0.002
10
100 1k 10k
FREQUENCY (Hz)
100k
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V, GND = 0, VCM = VCC/2, VOUT = VCC/2, VSHDN = VCC, AVCL = 1V/V, CL = 15pF, RL = ∞ to VCC/2, TA = +25°C, unless
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Settling Time to 0.01%
Crosstalk
Input Capacitance
Input Voltage-Noise Density
tS 2V step
CT VOUT = 2VP-P; f = 1kHz
CIN
f = 10kHz
en
f = 1kHz
2 µs
100 dB
5 pF
26
nV/√Hz
Input Current-Noise Density
f = 10kHz
In
f = 1kHz
0.6
pA/√Hz
Capacitive-Load Stability
No sustained oscillation
200 pF
Shutdown Time
Enable Time from Shutdown
Power-Up Time
tSHDN
tENABLE
tON
1 µs
1 µs
5 µs
Note 1: All devices are 100% production tested at TA = +25°C. All limits over temperature are guaranteed by design.
__________________________________________Typical Operating Characteristics
(VCC = 2.7V, GND = 0, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, VSHDN = VCC, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
1.4
1.3
VCC = 5.5V
1.2
VCC = 2.7V
1.1
1.0
-40
-15 10 35 60
TEMPERATURE (°C)
85
MINIMUM OPERATING VOLTAGE
vs. TEMPERATURE
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
-40
-15 10 35 60
TEMPERATURE (°C)
85
1000
900
800
700
600
500
400
300
200
100
0
-40
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
VCC = 5.5V
VCC = 2.7V
-15 10 35 60
TEMPERATURE (°C)
85
_______________________________________________________________________________________ 5
5 Page 
SC70/SOT23-8, 50mA IOUT, Rail-to-Rail I/O
Op Amps with Shutdown/Mute
Single-Supply Speaker Driver
The MAX4335/MAX4336 can be used as a single-sup-
ply speaker driver, as shown in the Typical Operating
Circuit. Capacitor C1 is used for blocking DC (a 0.1µF
ceramic capacitor can be used). When choosing resis-
tors R3 and R4, take into consideration the input bias
current as well as how much supply current can be tol-
erated. Choose resistors R1 and R2 according to the
amount of gain and current desired. Capacitor C3
ensures unity gain for DC. A 10µF electrolytic capacitor
is suitable for most applications. The coupling capaci-
tor C2 sets a low-frequency pole and is fairly large in
value. For a 32Ω load, a 100µF coupling capacitor
gives a low-frequency pole at 50Hz. The low-frequency
pole can be set according to the following equation:
ƒ = 1 / 2π (RLC2)
Rail-to-Rail Input Stage
Devices in the MAX4335–MAX4338 family of high-
output-current amplifiers have rail-to-rail input and output
stages designed for low-voltage, single-supply opera-
tion. The input stage consists of separate NPN and
PNP differential stages that combine to provide an
input common-mode range that extends 0.25V beyond
the supply rails. The PNP stage is active for input volt-
ages close to the negative rail, and the NPN stage is
active for input voltages near the positive rail. The
switchover transition region, which occurs near VCC/2,
has been extended to minimize the slight degradation
in common-mode rejection ratio caused by mismatch of
the input pairs.
Since the input stage switches between the NPN and
PNP pairs, the input bias current changes polarity as the
input voltage passes through the transition region. Match
the effective impedance seen by each input to reduce the
offset error caused by input bias currents flowing through
external source impedances (Figures 3 and 5).
High source impedances, together with input capaci-
tance, can create a parasitic pole that produces an
underdamped signal response. Reducing the input
impedance or placing a small (2pF to 10pF) capacitor
across the feedback resistor improves response.
The MAX4335–MAX4338’s inputs are protected from large
differential input voltages by 1kΩ series resistors and
back-to-back double diodes across the inputs (Figure 5).
For differential voltages less than 1.2V, input resistance is
typically 500kΩ. For differential input voltages greater
than 1.2V, input resistance is approximately 8.4kΩ. The
input bias current is given by the following equation:
IBIAS = (VDIFF - 1.2V) / 8.4kΩ
R3
R3 = R1 R2
MAX4335–MAX4338
R1 R2
Figure 3. Reducing Offset Error Due to Bias Current
(Noninverting)
R3 = R1 R2
R3
MAX4335–MAX4338
R1 R2
Figure 4. Reducing Offset Error Due to Bias Current (Inverting)
Rail-to-Rail Output Stage
The minimum output is within millivolts of ground for
single-supply operation, where the load is referenced
to ground (GND). Figure 6 shows the input voltage
range and the output voltage swing of a MAX4335 con-
nected as a voltage follower. The maximum output volt-
age swing is load dependent; however, it is guaranteed
to be within 400mV of the positive rail (VCC = 2.7V)
even with maximum load (32Ω to VCC/2).
Driving Capacitive Loads
The MAX4335–MAX4338 have a high tolerance for
capacitive loads. They are stable with capacitive loads
up to 200pF. Figure 7 is a graph of the stable operating
region for various capacitive loads vs. resistive loads.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MAX4338.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX4330 | Single/Dual/Quad / Low-Power / Single-Supply / Rail-to-Rail I/O Op Amps with Shutdown | Maxim Integrated |
| MAX4330EUK-T | Single/Dual/Quad / Low-Power / Single-Supply / Rail-to-Rail I/O Op Amps with Shutdown | Maxim Integrated |
| MAX4331 | Single/Dual/Quad / Low-Power / Single-Supply / Rail-to-Rail I/O Op Amps with Shutdown | Maxim Integrated |
| MAX4331ESA | Single/Dual/Quad / Low-Power / Single-Supply / Rail-to-Rail I/O Op Amps with Shutdown | Maxim Integrated |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |