MAX4321:Low-Cost, Low-Voltage, Rail-to-Rail, Input/Output, SOT23 5MHz Op Amp

Low-Voltage, Pin-for-Pin Upgrade for LMC7101

The MAX4321 operational amplifier (op amp) combines a 5MHz gain-bandwidth product and excellent DC accuracy with rail-to-rail operation at both the inputs and the output. This device requires only 650µA and operates from either a single +2.4V to +6.5V supply or dual ±1.2V to ±3.25V supplies, although the MAX4321 typically operates down to +1.8V (±0.9V). The MAX4321 remains unity-gain stable with capacitive loads up to 500pF and is capable of driving 250Ω loads to within 200mV of either rail. With rail-to-rail input common-mode range and output swing, the MAX4321 is ideal for low-voltage, single-supply applications. In addition, low ±1.2mV input offset voltage and high 2V/µs slew rate make this device ideal for signal-conditioning stages for precision, low-voltage data-acquisition systems. The MAX4321 comes in a space-saving 5-pin SOT23 package and is guaranteed over the extended (-40°C to +85°C) temperature range. The MAX4321 is a low-voltage, pin-for-pin compatible upgrade for the LMC7101 that offers five-times higher bandwidth, two-times faster slew rate, and about half the input voltage noise density.

Key Features
  • Low-Voltage, Pin-for-Pin Upgrade for LMC7101
  • Guaranteed +2.4V to +6.5V Single-Supply Operation
  • Typically Operates Down to +1.8V
  • 5MHz Gain-Bandwidth Product
  • 650µA Quiescent Current
  • Rail-to-Rail Common-Mode Input Voltage Range
  • Rail-to-Rail Output Voltage Range
  • Drives 250Ω Loads
  • Unity-Gain Stable for Capacitive Loads up to 500pF
  • No Phase Reversal for Overdriven Inputs
  • Low-Cost Solution in SOT23-5 Package
MAX4321: Typical Operating Circuit
MAX4321: Typical Operating Circuit
  • Automotive Sensors
  • Base Station/Wireless Infrastructure
  • Battery-Powered Applications
  • Computers: Desktops, Workstations, and Servers
  • Computers: Motherboards
  • Computers: Notebook
  • Data Acquisition
  • General Purpose Low-Voltage Applications
  • GPS Solutions
  • Low-Power, Low-Voltage Applications
  • MP3 Docking Stations: Mid Level
  • Portable Equipment
  • Programmable Logic Controllers (PLCs)
  • Sensor and Signal Conditioning
  • Set-Top Boxes
titleDownload file
MAX4321 Data SheetMAX4321.pdf
Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX43211Input/Output2.46.56503500911001505222SOT/5$0.83 @1k
Quality and Environmental Data
Related Products
  • MAX4322:Single/Dual/Quad, Low-Cost, UCSP/SOT23, Low-Power, Rail-to-Rail I/O Op Amps
  • MAX4040:Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4321EUK+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX4321EUK+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX4321EUK-TNo Longer AvailableMAX4321EUK+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX4321.pdf MAX4321
MAX4321.pdf MAX4321
MAX4321.pdf MAX4321
MAX4321.pdf MAX4321
MAX4321.pdf MAX4321