MAX4223EUT-T ,1GHz / Low-Power / SOT23 / Current-Feedback Amplifiers with ShutdownFeaturesThe MAX4223–MAX4228 current-feedback amplifiers' Ultra-High Speed and Fast Settling Time:co ..
MAX4224ESA ,1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with Shutdownapplications, with differential gain and phase errors of100kΩ Output Impedance0.01% and 0.02°, 0.1d ..
MAX4224EUT+T ,1GHz, Low-Power, SOT23, Current Feedback Amplifiers with ShutdownApplicationsMAX4223EUT-T -40°C to +85°C 6 SOT23 AAADADC Input Buffers Data CommunicationsMAX4223ESA ..
MAX4225ESA ,1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with ShutdownFeaturesThe MAX4223–MAX4228 current-feedback amplifiers' Ultra-High Speed and Fast Settling Time:co ..
MAX4226ESD ,1GHz, Low-Power, SOT23, Current-Feedback Amplifiers with ShutdownELECTRICAL CHARACTERISTICS(V = +5V, V = -5V, SHDN = 5V, V = 0V, R = ¥ , T = T to T , unless otherwi ..
MAX4226EUB+ ,1GHz, Low-Power, SOT23, Current Feedback Amplifiers with ShutdownELECTRICAL CHARACTERISTICS(V = +5V, V = -5V, SHDN = 5V, V = 0V, R = ¥ , T = T to T , unless otherwi ..
MAX809REUR ,3-Pin Microprocessor Reset CircuitsMAX803/MAX809/ 3-Pin Microprocessor Reset CircuitsMAX810
MAX809REUR+ ,3-Pin Microprocessor Reset CircuitsFeatures● Precision Monitoring of +2.5V, +3V, +3.3V, and The MAX803/MAX809/MAX810 are microprocess ..
MAX809REUR+T ,3-Pin Microprocessor Reset CircuitsGeneral Description Beneits and
MAX809REUR-T ,3-Pin Microprocessor Reset CircuitsFeaturesThe MAX803/MAX809/MAX810 are microprocessor (µP) Precision Monitoring of +2.5V, +3V, +3.3V ..
MAX809REUR-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 ..
MAX809REXR+T ,3-Pin Microprocessor Reset CircuitsApplications● ComputersGND GND● Controllers● Intelligent Instruments*MAX803 ONLY● Critical μP and μ ..
MAX4223ESA-MAX4223EUT-T
1GHz / Low-Power / SOT23 / Current-Feedback Amplifiers with Shutdown
_______________General DescriptionThe MAX4223–MAX4228 current-feedback amplifiers
combine ultra-high-speed performance, low distortion,
and excellent video specifications with low-power oper-
ation. The MAX4223/MAX4224/MAX4226/MAX4228
have a shutdown feature that reduces power-supply
current to 350µA and places the outputs into a high-
impedance state. These devices operate with dual sup-
plies ranging from ±2.85V to ±5.5V and provide a
typical output drive current of 80mA. The MAX4223/
MAX4225/MAX4226 are optimized for a closed-loop
gain of +1 (0dB) or more and have a -3dB bandwidth of
1GHz, while the MAX4224/MAX4227/MAX4228 are
compensated for a closed-loop gain of +2 (6dB) or
more, and have a -3dB bandwidth of 600MHz (1.2GHz
gain-bandwidth product).
The MAX4223–MAX4228 are ideal for professional video
applications, with differential gain and phase errors of
0.01% and 0.02°, 0.1dB gain flatness of 300MHz, and a
1100V/µs slew rate. Total harmonic distortion (THD) of
-60dBc (10MHz) and an 8ns settling time to 0.1% suit
these devices for driving high-speed analog-to-digital
inputs or for data-communications applications. The low-
power shutdown mode on the MAX4223/MAX4224/
MAX4226/MAX4228 makes them suitable for portable
and battery-powered applications. Their high output
impedance in shutdown mode is excellent for multiplex-
ing applications.
The single MAX4223/MAX4224 are available in space-
saving 6-pin SOT23 packages. All devices are available
in the extended -40°C to +85°C temperature range.
________________________ApplicationsADC Input BuffersData Communications
Video CamerasVideo Line Drivers
Video SwitchesVideo Multiplexing
Video EditorsXDSL Drivers
RF ReceiversDifferential Line Drivers
____________________________FeaturesUltra-High Speed and Fast Settling Time:
1GHz -3dB Bandwidth (MAX4223, Gain = +1)
600MHz -3dB Bandwidth (MAX4224, Gain = +2)
1700V/µs Slew Rate (MAX4224)
5ns Settling Time to 0.1% (MAX4224)Excellent Video Specifications (MAX4223):
Gain Flatness of 0.1dB to 300MHz
0.01%/0.02°DG/DP ErrorsLow Distortion:
-60dBc THD (fc= 10MHz)
42dBm Third-Order Intercept (f = 30MHz)6.0mA Quiescent Supply Current (per amplifier)Shutdown Mode:
350µA Supply Current (per amplifier)
100kΩOutput ImpedanceHigh Output Drive Capability:
80mA Output Current
Drives up to 4 Back-Terminated 75ΩLoads to
±2.5V while Maintaining Excellent Differential
Gain/Phase CharacteristicsAvailable in Tiny 6-Pin SOT23 and 10-Pin µMAX
Packages
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +5V, VEE= -5V, SHDN= 5V, VCM= 0V, RL= ¥, TA= TMINto TMAX, unless otherwise noted. Typical values are at = +25°C.) (Note 1)
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.
Supply Voltage (VCCto VEE)..................................................12V
Analog Input Voltage.......................(VEE- 0.3V) to (VCC+ 0.3V)
Analog Input Current........................................................±25mASHDNInput Voltage.........................(VEE- 0.3V) to (VCC+ 0.3V)
Short-Circuit Duration
OUT to GND...........................................................Continuous
OUT to VCCor VEE............................................................5sec
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW
8-Pin SO (derate 5.9mW/°C above +70°C)...................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C)............444mW
14-Pin SO (derate 8.3mW/°C above +70°C).................667mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
DC ELECTRICAL CHARACTERISTICS (continued)(VCC= +5V, VEE= -5V, SHDN= 5V, VCM= 0V, RL= ¥, TA= TMINto TMAX, unless otherwise noted. Typical values are at = +25°C.) (Note 1)
AC ELECTRICAL CHARACTERISTICS (VCC= +5V, VEE= -5V, SHDN= 5V, VCM= 0V, AV= +1V/V for MAX4223/MAX4225/MAX4226, AV= +2V/V for MAX4224/MAX4227/
MAX4228, RL= 100Ω, TA= +25°C, unless otherwise noted.) (Note 4)
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
Note 1:The MAX422_EUT is 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2:Absolute Maximum Power Dissipation must be observed.
Note 3:Does not include impedance of external feedback resistor network.
Note 4:AC specifications shown are with optimal values of RFand RG. These values vary for product and package type, and are
tabulated in the Applications Informationsection of this data sheet.
Note 5:The AC specifications shown are not measured in a production test environment. The minimum AC specifications given are
based on the combination of worst-case design simulations along with a sample characterization of units. These minimum
specifications are for design guidance only and are not intended to guarantee AC performance (see AC Testing/
Performance). For 100% testing of these parameters, contact the factory.
Note 6:Input Test Signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0IRE to 100IRE). IRE is a unit of
video signal amplitude developed by the International Radio Engineers. 140IRE = 1V.
Note 7:Assumes printed circuit board layout similar to that of Maxim’s evaluation kit.
AC ELECTRICAL CHARACTERISTICS (continued)(VCC= +5V, VEE= -5V, SHDN= 5V, VCM= 0V, AV= +1V/V for MAX4223/MAX4225/MAX4226, AV= +2V/V for MAX4224/MAX4227/
MAX4228, RL= 100Ω, TA= +25°C, unless otherwise noted.) (Note 4)
__________________________________________Typical Operating Characteristics(VCC= +5V, VEE= -5V, RL= 100Ω, TA = +25°C, unless otherwise noted.)
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
____________________________Typical Operating Characteristics (continued)(VCC= +5V, VEE= -5V, RL= 100Ω, TA = +25°C, unless otherwise noted.)
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
____________________________Typical Operating Characteristics (continued)(VCC= +5V, VEE= -5V, RL= 100Ω, TA = +25°C, unless otherwise noted.)
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
____________________________Typical Operating Characteristics (continued)(VCC= +5V, VEE= -5V, RL= 100Ω, TA = +25°C, unless otherwise noted.)
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
____________________________Typical Operating Characteristics (continued)(VCC= +5V, VEE= -5V, RL= 100Ω, TA = +25°C, unless otherwise noted.)
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________Pin Description
MAX4223–MAX4228
1GHz, Low-Power, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________Detailed DescriptionThe MAX4223–MAX4228 are ultra-high-speed, low-
power, current-feedback amplifiers featuring -3dB
bandwidths up to 1GHz, 0.1dB gain flatness up to
300MHz, and very low differential gain and phase
errors of 0.01% and 0.02°, respectively. These devices
operate on dual ±5V or ±3V power supplies and
require only 6mA of supply current per amplifier. The
MAX4223/MAX4225/MAX4226 are optimized for
closed-loop gains of +1 (0dB) or more and have -3dB
bandwidths of 1GHz. The MAX4224/MAX4227/
MAX4228 are optimized for closed-loop gains of +2
(6dB) or more, and have -3dB bandwidths of 600MHz
(1.2GHz gain-bandwidth product).
The current-mode feedback topology of these ampli-
fiers allows them to achieve slew rates of up to
1700V/µs with corresponding large signal bandwidths
up to 330MHz. Each device in this family has an output
that is capable of driving a minimum of 60mA of output
current to ±2.5V.
Theory of OperationSince the MAX4223–MAX4228 are current-feedback
amplifiers, their open-loop transfer function is
expressed as a transimpedance:
The frequency behavior of this open-loop transimped-
ance is similar to the open-loop gain of a voltage-feed-
back amplifier. That is, it has a large DC value and
decreases at approximately 6dB per octave.
Analyzing the current-feedback amplifier in a gain con-
figuration (Figure 1) yields the following transfer func-
tion:
At low gains, (G x RIN-) << RF. Therefore, unlike tradi-
tional voltage-feedback amplifiers, the closed-loop
bandwidth is essentially independent of the closed-
loop gain. Note also that at low frequencies, TZ>> [(G
x RIN-) + RF], so that:
Low-Power Shutdown ModeThe MAX4223/MAX4224/MAX4226/MAX4228 have a
shutdown mode that is activated by driving the SHDN
input low. When powered from ±5V supplies, the SHDN
input is compatible with TTL logic. Placing the amplifier
in shutdown mode reduces quiescent supply current to
350µA typical, and puts the amplifier output into a high-
impedance state (100kΩtypical). This feature allows
these devices to be used as multiplexers in wideband
systems. To implement the mux function, the outputs of
multiple amplifiers can be tied together, and only the
amplifier with the selected input will be enabled. All of
the other amplifiers will be placed in the low-power
shutdown mode, with their high output impedance pre-
senting very little load to the active amplifier output. For
gains of +2 or greater, the feedback network imped-
ance of all the amplifiers used in a mux application
must be considered when calculating the total load on
the active amplifier output.
__________Applications Information
Layout and Power-Supply BypassingThe MAX4223–MAX4228 have an extremely high band-
width, and consequently require careful board layout,
including the possible use of constant-impedance
microstrip or stripline techniques.
