Overview
The LMV7272TL/NOPB is a dual low-power comparator from Texas Instruments, designed for use in low-voltage, low-power, and space-critical applications. These comparators are built using Texas Instruments' advanced submicron silicon-gate BiCMOS process, which enhances noise performance with bipolar inputs and provides rail-to-rail output swing with CMOS outputs.
The LMV7272 features ultra-low supply current of 9 µA per channel, low input bias current, and low input offset current, making it ideal for battery-powered electronics, wearable devices, and general-purpose low-voltage applications.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (V+ - V−) | 1.8 | 5 | V | ||
| Input Offset Voltage (VOS) | 0.3 | 4 | 6 | mV | |
| Input Bias Current (IB) | 10 | nA | |||
| Input Offset Current (IOS) | 200 | pA | |||
| Supply Current (IS) per Channel | 9 | 12 | 18 | µA | |
| Propagation Delay (tPLH/tPHL) | Input Overdrive = 20 mV | 810 | 1200 | ns | |
| Input Common Mode Voltage Range (VCM) | -0.1 | 5.0 | V | ||
| Output Voltage High (VOH) | IO = 0.5 mA | 4.675 | 4.77 | V | |
| Output Voltage Low (VOL) | IO = -0.5 mA | 27 | 70 | mV | |
| Package | DSBGA (8) |
Key Features
- Rail-to-Rail Input Stage: The LMV7272 has an input common mode voltage range from -0.1 V below V- to 0.1 V above V+, making it suitable for power supply monitoring and other applications where signals are close to ground and power supplies.
- Ultra Low Supply Current: Consumes as little as 9 µA per channel, ideal for battery-powered and low-power designs.
- Low Input Bias Current and Offset Current: 10 nA input bias current and 200 pA input offset current contribute to high accuracy and low noise.
- Push-Pull Output Stage: The LMV7272 features a push-pull output stage, minimizing power consumption by eliminating the need for a pull-up resistor.
- Open-Drain Output (LMV7275, but relevant for understanding the series): Although the LMV7272 does not have an open-drain output, it is part of a series where some models do, allowing for wired-OR configurations and level-shifting applications.
- Compact Packaging: Available in a DSBGA package, reducing PCB area significantly.
Applications
- Wearable Devices: Ideal for low-power, space-critical designs in wearable technology.
- Mobile Phones and Tablets: Suitable for low-voltage applications in mobile devices.
- Battery-Powered Electronics: Low power consumption makes it perfect for battery-powered devices.
- General Purpose Low Voltage Applications: Can be used in various low-voltage applications requiring high accuracy and low power consumption.
Q & A
- What is the supply voltage range for the LMV7272?
The supply voltage range for the LMV7272 is from 1.8 V to 5 V.
- What is the typical supply current per channel for the LMV7272?
The typical supply current per channel is 12 µA.
- What is the propagation delay for the LMV7272 with a 20 mV input overdrive?
The propagation delay is typically 1200 ns with a 20 mV input overdrive.
- What is the input common mode voltage range for the LMV7272?
The input common mode voltage range is from -0.1 V below V- to 0.1 V above V+.
- What type of output stage does the LMV7272 have?
The LMV7272 features a push-pull output stage.
- In what package is the LMV7272 available?
The LMV7272 is available in a DSBGA (8) package.
- What are some typical applications for the LMV7272?
Typical applications include wearable devices, mobile phones and tablets, battery-powered electronics, and general-purpose low-voltage applications.
- How does the rail-to-rail input stage benefit the LMV7272?
The rail-to-rail input stage allows the comparator to sense signals close to ground and power supplies, making it ideal for power supply monitoring circuits.
- What is the significance of the low input bias and offset currents in the LMV7272?
The low input bias and offset currents contribute to high accuracy and low noise in the comparator's operation.
- How does the push-pull output stage minimize power consumption?
The push-pull output stage eliminates the need for a pull-up resistor, thereby minimizing power consumption.
