LT1637IS8 Comparator ICs 0.4V

LT1637IS8

The LT1637 is a robust op amp that works with any single or split supply from 2.7V to 44V. It has a 1.1MHz gain-bandwidth product and consumes less than 250μA of quiescent current. It can also be shut down, making the output high impedance and lowering the quiescent current to only 3μA. The LT1637 is protected from reverse supply up to 25V, as it draws almost no current in this case. The input range of the LT1637 covers both supplies and the output swings to both supplies as well.

The LT1637 can drive heavy loads unlike most micropower op amps; its rail-to-rail output delivers 25mA. The LT1637 is stable at unity gain with any capacitive load up to 4700pF, if optional 0.22μF and 150Ω compensation is used.

The LT1637 has a unique input stage that stays high impedance and operates even when above the positive supply. The inputs can handle 44V both differential and common mode, even on a 3V supply. The inputs are protected by built-in resistors for faults up to 22V below the negative supply. The output does not reverse phase for inputs 5V below VEE or 44V above VEE , regardless of V CC.

The LT1637 op amp comes in the 8-pin MSOP, PDIP and SO packages. For applications with limited space, the LT1637 is also available in a 3mm × 3mm × 0.8mm dual fine pitch leadless package (DFN).

Features

• Operates with Inputs Above V +
• Rail-to-Rail Input and Output
• Micropower: 250μA Supply Current Max
• Operating Temperature Range: – 55°C to 125°C
• Gain-Bandwidth Product: 1.1MHz
• Slew Rate: 0.4V/μs
• Low Input Offset Voltage: 350μV Max
• Single Supply Input Range: – 0.4V to 44V
• High Output Current: 25mA Min
• Specified on 3V, 5V and ±15V Supplies
• Output Shutdown
• Output Drives 4700pF with Output Compensation
• Reverse Battery Protection to 25V
• High Voltage Gain: 800V/mV
• High CMRR: 110dB
  Available in 8-Lead MSOP, PDIP and SO Packages; and a Tiny (3mm × 3mm × 0.8mm) DFN Package

Applications

1. Battery or Solar Powered Systems:
   • Portable Instrumentation
   • Sensor Conditioning
2. Supply Current Sensing
3. Battery Monitoring
4. MUX Amplifiers
5. 4mA to 25mA Transmitters

Package Includes

• 1 x LT1637IS8

Datasheet:

LT1637IS8 Overview

The LT1637IS8 is a precision, rail-to-rail input/output op amp designed for low-power applications across a wide voltage range. With supply capability from 2.7V to 44V and reverse-voltage protection, it delivers accurate signal conditioning and buffering in portable, industrial, and instrumentation circuits.

Key Features of LT1637IS8

• Rail-to-rail input and output swing for full-scale signal processing
• Micropower operation: 250 µA max quiescent current, drops to 3 µA in shutdown
• High output drive: 25 mA minimum for driving heavy loads
• Wide single-supply input range: –0.4 V to 44 V, protected against reverse voltages up to 25 V
• Fast performance: 1.1 MHz gain-bandwidth product and 0.4 V/µs slew rate
• Genuine LT1637IS8 from Zbotic with fast shipping within 24 hours

Applications and Use Cases

• Battery-powered sensor interfaces requiring rail-to-rail operation
• Portable instrumentation and handheld measurement devices
• Active filters and signal conditioning in data acquisition systems
• Precision current sensing and level shifting in industrial controls
• Unity-gain buffer for DAC and ADC driver stages

How to Use LT1637IS8

To deploy the LT1637IS8, connect the supply rails within 2.7 V to 44 V, add decoupling capacitors close to the power pins, and wire the shutdown pin high to enable or low to disable the output (3 µA standby current). Configure your input and feedback network according to the desired gain, and the op amp will provide stable, rail-to-rail performance even into capacitive loads up to 4700 pF when properly compensated.

Why Buy from Zbotic?

• Genuine Products: All items sourced from authorized distributors
• Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
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• Technical Support: Expert help for setup and troubleshooting
• Easy Returns: Hassle-free replacement for defective products

Frequently Asked Questions

What is the allowable supply voltage range for the LT1637IS8?

The LT1637IS8 operates from a single or split supply of 2.7 V up to 44 V and features reverse-voltage protection up to 25 V.

Can the LT1637IS8 drive capacitive loads directly?

Yes, the device is unity-gain stable with capacitive loads up to 4700 pF when using the recommended 0.22 µF and 150 Ω compensation network.

How do I reduce power consumption when the amplifier is not in use?

Pull the shutdown pin low to place the LT1637IS8 into high-impedance standby mode, reducing quiescent current to approximately 3 µA.