MAX4250EUK-T ,SOT23 / Single-Supply / Low-Noise / Low-Distortion / Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS(V = +5V, V = 0V, V = 0V, V = V /2, R tied to V /2, SHDN = V or open, T = ..
MAX4251ESA ,Single, single-supply operation +2.4V to 5.5V, low-noise, low-distortion, Rail-to-Rail op amp. Gain bandwidth 3MHz, min stable gain 1V/V, with shutdown.Features' Low Input Voltage Noise Density: 7.9nV/√HzThe MAX4249–MAX4257 low-noise, low-distortion o ..
MAX4251ESA+ ,UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS(V = 5V, V = 0V, V = 0V, V = V /2, R connected to V /2, SHDN = V , T = T ..
MAX4252EBL+T ,UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op AmpsFeatures! Available in Space-Saving UCSP, SOT23, andThe MAX4249–MAX4257 low-noise, low-distortion o ..
MAX4252ESA ,Dual, single-supply operation +2.4V to 5.5V, low-noise, low-distortion, Rail-to-Rail op amp. Gain bandwidth 3MHz, min stable gain 1V/V.features make the' Input Common-Mode Voltage Range Includesdevices an ideal choice for portable/bat ..
MAX4252ESA+ ,UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Ampsfeatures makeGroundthe devices an ideal choice for portable/battery-powered! Outputs Swing Within 8 ..
MAX810LEUR-T ,3-Pin Microprocessor Reset CircuitsFeaturesThe MAX803/MAX809/MAX810 are microprocessor (µP) Precision Monitoring of +2.5V, +3V, +3.3V ..
MAX810LEUR-T10 ,3-Pin Microprocessor Reset CircuitsMAX803L/M/R/S/T/Z, MAX809J/L/M/R/S/T/Z, MAX810L/M/R/S/T/Z19-0344; Rev 4; 12/993-Pin Microprocessor ..
MAX810LEXR+T ,3-Pin Microprocessor Reset CircuitsMAX803/MAX809/ 3-Pin Microprocessor Reset CircuitsMAX810
MAX810LTR ,3-Pin Microprocessor Reset MonitorsThe MAX809 and MAX810 are cost−effective system supervisorcircuits designed to monitor V in digital ..
MAX810LTR ,3-Pin Microprocessor Reset Monitors3MAX809 Series, MAX810 SeriesAPPLICATIONS INFORMATIONV Transient Rejection maintained valid to V = ..
MAX810LTRG , Very Low Supply Current 3−Pin Microprocessor Reset Monitors
MAX4249ESD-MAX4250EUK-MAX4250EUK-T
SOT23 / Single-Supply / Low-Noise / Low-Distortion / Rail-to-Rail Op Amps
General DescriptionThe MAX4249–MAX4257 low-noise, low-distortion oper-
ational amplifiers offer Rail-to-Rail®outputs and single-
supply operation down to 2.4V. They draw only 400µA
of quiescent supply current per amplifier while featuring
ultra-low distortion (0.0002% THD), as well as low input
voltage noise density (7.9nV/√Hz) and low input current
noise density (0.5fA/√Hz). These features make the
devices an ideal choice for portable/battery-powered
applications that require low distortion and/or low noise.
For additional power conservation, the MAX4249/
MAX4251/MAX4253/MAX4256 offer a low-power shut-
down mode that reduces supply current to 0.5µA and
puts the amplifiers’ outputs into a high-impedance state.
The MAX4249–MAX4257’s outputs swing rail-to-rail and
their input common-mode voltage range includes
ground. The MAX4250–MAX4254 are unity-gain stable;
the MAX4249/MAX4255/MAX4256/MAX4257 are internal-
ly compensated for gains of 10V/V or greater. The single
MAX4250/MAX4255 are available in a space-saving,
5-pin SOT23 package.
ApplicationsPortable/Battery-Powered Equipment
Medical Instrumentation
ADC Buffers
Digital Scales
Strain Gauges
Sensor Amplifiers
Portable Communications Devices
____________________________FeaturesLow Input Voltage Noise Density: 7.9nV/√HzLow Input Current Noise Density: 0.5fA/√HzLow Distortion: 0.0002% THD (1kΩload)400µA Quiescent Supply Current per AmplifierSingle-Supply Operation from +2.4V to +5.5VInput Common-Mode Voltage Range Includes
GroundOutputs Swing within 8mV of Rails with a 10kΩLoad3MHz GBW Product, Unity-Gain Stable
(MAX4250–MAX4254)
22MHz GBW Product, Stable with AV‡
10V/V
(MAX4249/MAX4255/MAX4256/MAX4257)Excellent DC Characteristics:
VOS= 70µV
IBIAS= 1pA
Large-Signal Voltage Gain = 116dBLow-Power Shutdown Mode:
Reduces Supply Current to 0.5µA
Places Outputs in a High-Impedance State400pF Capacitive-Load Handling CapabilityAvailable in Space-Saving SOT23 and µMAX
Packages
MAX4249–MAX4257
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps19-1295; Rev 2; 4/98
Selector GuideRail-to-Rail is a registered trademark of Nippon Motorola Ltd.
MAX4249–MAX4257
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +5V, VSS= 0V, VCM= 0V, VOUT= VDD/2, RLtied to VDD/2, SHDN= VDDor open, TA= -40°C to +85°C, unless otherwise
noted. Typical values are at TA= +25°C.) (Notes 1, 2)
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.
Power-Supply Voltage (VDDto VSS)......................+6.0V to -0.3V
Analog Input Voltage (IN_+, IN_-)....(VDD+ 0.3V) to (VSS- 0.3V)
SHDNInput Voltage....................................+6.0V to (VSS- 0.3V)
Output Short-Circuit Duration to Either Supply..........Continuous
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
8-Pin µMAX (derate 4.10mW/°C above +70°C)...........330mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX4249–MAX4257
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
ELECTRICAL CHARACTERISTICS (continued)(VDD= +5V, VSS= 0V, VCM= 0V, VOUT= VDD/2, RLtied to VDD/2, SHDN= VDDor open, TA= -40°C to +85°C, unless otherwise
noted. Typical values are at TA= +25°C.) (Notes 1, 2)
Note 1:SHDNis available on the MAX4249/MAX4251/MAX4253/MAX4256 only.
Note 2:The MAX4249EUB, MAX425_EU_ specifications are 100% tested at TA= +25°C. Limits over the extended temperature
range are guaranteed by design, not production tested.
Note 3:Guaranteed by the Power-Supply Rejection Ratio (PSRR) test.
Note 4:Guaranteed by design.
Note 5:Lowpass filter bandwidth is 22kHz for f = 1kHz, and 80kHz for f = 20kHz. Noise floor of test equipment = 10nV/√Hz.
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics(VDD= +5V, VSS= 0V, VCM= VOUT= VDD/2, input noise floor of test equipment = 10nV/√Hzfor all distortion measurements, = +25°C, unless otherwise noted.)
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)(VDD= +5V, VSS= 0V, VCM= VOUT= VDD/2, input noise floor of test equipment = 10nV/√Hzfor all distortion measurements, = +25°C, unless otherwise noted.)
MAX4249–MAX4257
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)(VDD= +5V, VSS= 0V, VCM= VOUT= VDD/2, input noise floor of test equipment = 10nV/√Hzfor all distortion measurements, = +25°C, unless otherwise noted.)
MAX4249–MAX4257
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)(VDD= +5V, VSS= 0V, VCM= VOUT= VDD/2, input noise floor of test equipment = 10nV/√Hzfor all distortion measurements,= +25°C, unless otherwise noted.)
_______________Detailed DescriptionThe MAX4249–MAX4257 single-supply operational
amplifiers feature ultra-low noise and distortion while
consuming very little power. Their low distortion and
low noise make them ideal for use as preamplifiers in
wide dynamic-range applications, such as 16-bit ana-
log-to-digital converters (see Typical Operating Circuit).
Their high input impedance and low noise are also use-
ful for signal conditioning of high-impedance sources,
such as piezoelectric transducers.
These devices have true rail-to-rail output operation,
drive loads as low as 1kΩwhile maintaining DC accura-
cy, and can drive capacitive loads up to 400pF without
oscillation. The input common-mode voltage range
extends from VDD- 1.1V to 200mV beyond the negative
rail. The push/pull output stage maintains excellent DC
characteristics, while delivering up to ±5mA of current.
The MAX4250–MAX4254 are unity-gain stable, whereas
the MAX4249/MAX4255/MAX4256/MAX4257 have a
higher slew rate and are stable for gains ‡10V/V. The
MAX4249/ MAX4251/MAX4253/MAX4256 feature a low-
power shutdown mode, which reduces the supply cur-
rent to 0.5µA and disables the outputs.
Low DistortionMany factors can affect the noise and distortion that the
device contributes to the input signal. The following
guidelines offer valuable information on the impact of
design choices on Total Harmonic Distortion (THD).
Choosing proper feedback and gain resistor values for
a particular application can be a very important factor
in reducing THD. In general, the smaller the closed-
loop gain, the smaller the THD generated, especially
when driving heavy resistive loads. Large-value feed-
back resistors can significantly improve distortion. The
THD of the part normally increases at approximately
20dB per decade, as a function of frequency.
Operating the device near or above the full-power
bandwidth significantly degrades distortion.
Referencing the load to either supply also improves the
part’s distortion performance, because only one of the
MOSFETs of the push/pull output stage drives the out-
put. Referencing the load to mid-supply increases the
part’s distortion for a given load and feedback setting.
(See the Total Harmonic Distortion vs. Frequency graph
in the Typical Operating Characteristics.)
MAX4249–MAX4257
SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Pin Description
