Overview
The LMP8601MAX/NOPB, produced by Texas Instruments, is a fixed-gain, precision current-sense amplifier designed for both unidirectional and bidirectional current sensing applications. This device is part of the LMP860x family and is particularly suited for use in systems requiring high accuracy and reliability in current measurement. The LMP8601MAX/NOPB operates with a single supply voltage and can handle a wide input common-mode voltage range of –22 V to +60 V when supplied with 5 V, or –4 V to +27 V with a 3.3-V supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VS – GND) | 3 | 5.5 | V | |
| Input Common-Mode Voltage Range (VS = 5 V) | –22 | 60 | V | |
| Input Common-Mode Voltage Range (VS = 3.3 V) | –4 | 27 | V | |
| Total Gain (LMP8601, LMP8601-Q1) | 19.9 | 20 | 20.1 | V/V |
| Supply Current | 0.6 | 1.3 | 1.5 | mA |
| Bandwidth | 50 | 60 | kHz | |
| Input Offset Voltage | 1 | mV | ||
| Power-Supply Rejection Ratio (PSRR) | 70 | 90 | dB | |
| Operating Temperature Range | –40 | 125 | °C |
Key Features
- Precision Gain: The LMP8601MAX/NOPB has a precise gain of 20x, achieved through a two-stage amplifier configuration (a preamplifier with a gain of 10x and an output stage buffer amplifier with a gain of 2x).
- Wide Input Common-Mode Voltage Range: The device can operate with input common-mode voltages ranging from –22 V to +60 V with a 5-V supply, or –4 V to +27 V with a 3.3-V supply.
- Single-Supply Bidirectional Operation: Capable of unidirectional or bidirectional current sensing with a single supply voltage.
- High Accuracy and Reliability: Features low input offset voltage (maximum 1 mV) and high power-supply rejection ratio (minimum 70 dB).
- AEC-Q100 Qualified for Automotive Applications: The LMP8601-Q1 version is compliant with the AEC-Q100 standard, making it suitable for automotive applications.
Applications
- Battery Management Systems: Ideal for monitoring current in battery management systems due to its high accuracy and wide input range.
- Automotive Systems: The LMP8601-Q1 version is specifically designed for automotive applications, adhering to the AEC-Q100 standard.
- Industrial Automation: Suitable for current sensing in industrial automation systems where precision and reliability are crucial.
- Power Supplies and DC-DC Converters: Can be used to monitor current in power supplies and DC-DC converters, ensuring efficient and safe operation).
Q & A
- What is the primary function of the LMP8601MAX/NOPB?
The primary function of the LMP8601MAX/NOPB is to act as a precision current-sense amplifier for both unidirectional and bidirectional current sensing applications).
- What is the gain of the LMP8601MAX/NOPB?
The LMP8601MAX/NOPB has a precise gain of 20x).
- What is the input common-mode voltage range for the LMP8601MAX/NOPB when supplied with 5 V?
The input common-mode voltage range is –22 V to +60 V when operating from a single 5-V supply).
- Is the LMP8601MAX/NOPB suitable for automotive applications?
The LMP8601-Q1 version is specifically designed for automotive applications and is compliant with the AEC-Q100 standard).
- What is the operating temperature range of the LMP8601MAX/NOPB?
The operating temperature range is –40°C to 125°C for most devices, with a special version (LMP8601EDRQ1) operating up to 150°C).
- What is the bandwidth of the LMP8601MAX/NOPB?
The bandwidth of the LMP8601MAX/NOPB is 50 kHz to 60 kHz).
- How does the LMP8601MAX/NOPB achieve its gain?
The gain is achieved through a two-stage amplifier configuration: a preamplifier with a gain of 10x and an output stage buffer amplifier with a gain of 2x).
- What is the power-supply rejection ratio (PSRR) of the LMP8601MAX/NOPB?
The PSRR is minimum 70 dB and maximum 90 dB).
- Can the LMP8601MAX/NOPB be used for bidirectional current sensing?
Yes, the LMP8601MAX/NOPB is capable of unidirectional or bidirectional current sensing with a single supply voltage).
- What is the input offset voltage of the LMP8601MAX/NOPB?
The input offset voltage is maximum 1 mV).
