Overview
The INA301A1IDGKR, produced by Texas Instruments, is a 36-V, high-speed, zero-drift, voltage-output, current-shunt monitor. This device integrates both a high common-mode current-sensing amplifier and a high-speed comparator, designed to detect overcurrent conditions by measuring the voltage developed across a current-sensing resistor. The INA301A1IDGKR operates from a single 2.7-V to 5.5-V supply and is specified over an extended operating temperature range of –40°C to +125°C. It is available in an 8-pin VSSOP package.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Common-mode input voltage range (VCM) | 0 | 36 | V | ||
| Differential input voltage range (VIN+ - VIN-) | 0 | 250 | mV | ||
| Offset voltage (VOS) | ±25 | ±125 | µV | ||
| Offset voltage drift (dVOS/dT) | TA = –40°C to +125°C | 0.1 | 0.5 | µV/°C | |
| Gain (G) | 20 | V/V | |||
| Gain error | VOUT = 0.5 V to VS – 0.5 V | ±0.03% | ±0.1% | ||
| Power-supply rejection ratio (PSRR) | VS = 2.7 V to 5.5 V, VIN+ = 12 V, TA = –40°C to +125°C | ±0.1 | ±10 | µV/V | |
| Input bias current (IB) | IB+, IB– | 120 | µA | ||
| Operating supply range (VS) | TA = –40°C to +125°C | 2.7 | 5.5 | V | |
| Quiescent current (IQ) | VSENSE = 0 mV, TA = 25°C | 500 | 650 | µA | |
| Total alert propagation delay (tp) | Input overdrive = 1 mV | 0.75 | 1 | µs |
Key Features
- Dual Output: The device features both an amplifier and a comparator output, enabling simultaneous current measurement and overcurrent detection.
- High Accuracy Amplifier: Offers low offset voltage (max 35 µV) and low offset voltage drift (max 0.5 µV/°C), ensuring high-precision measurements.
- Programmable Alert Threshold: The alert threshold can be set using a single external resistor, providing flexibility in setting the current threshold level.
- High-Speed Comparator: Features a total alert response time of under 1 µs, allowing for quick detection of overcurrent events.
- Open-Drain Output with Latching Mode: The alert output can operate in either transparent or latched mode, providing options for different application needs.
- Wide Common-Mode Range: Can measure differential voltage signals on common-mode voltages up to 36 V, independent of the supply voltage.
- Low Power Consumption: Operates with a quiescent current of up to 700 µA, making it suitable for power-sensitive applications.
Applications
- Overcurrent Protection: Ideal for detecting and preventing overcurrent conditions in various systems.
- Power-Supply Protection: Used to monitor and protect power supplies from overcurrent events.
- Circuit Breakers: Employed in circuit breaker applications to ensure rapid detection and response to overcurrent conditions.
- Computers and Servers: Utilized in computer and server systems to monitor and protect against overcurrent conditions.
- Telecom Equipment: Used in telecommunications equipment for reliable overcurrent detection and protection.
- Battery Management: Applied in battery management systems to ensure safe and efficient operation.
Q & A
- What is the operating supply voltage range of the INA301A1IDGKR?
The INA301A1IDGKR operates from a single 2.7-V to 5.5-V supply.
- What is the maximum offset voltage of the INA301A1IDGKR?
The maximum offset voltage is ±125 µV.
- How is the alert threshold set on the INA301A1IDGKR?
The alert threshold can be set using a single external resistor.
- What is the total alert propagation delay of the INA301A1IDGKR?
The total alert propagation delay is under 1 µs.
- What are the available gain options for the INA301A1IDGKR?
The available gain options are 20 V/V, 50 V/V, and 100 V/V, but the INA301A1IDGKR specifically has a gain of 20 V/V.
- What is the common-mode input voltage range of the INA301A1IDGKR?
The common-mode input voltage range is 0 V to 36 V.
- What is the quiescent current of the INA301A1IDGKR?
The quiescent current is up to 700 µA.
- What package type is the INA301A1IDGKR available in?
The device is available in an 8-pin VSSOP package.
- What are some typical applications of the INA301A1IDGKR?
Typical applications include overcurrent protection, power-supply protection, circuit breakers, computers and servers, telecom equipment, and battery management.
- What is the operating temperature range of the INA301A1IDGKR?
The device operates over a temperature range of –40°C to +125°C.
