LMP8645MKX/NOPB
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| Current - Supply | 2.2mA |
| Output Type | - |
| Number of Circuits | 1 |
| Slew Rate | 0.6V/µs |
| Supplier Device Package | SOT-23-THIN |
| -3db Bandwidth | 860 kHz |
| Current - Input Bias | 13 µA |
| Amplifier Type | Current Sense |
| Voltage - Input Offset | 1.7 mV |
| Current - Output / Channel | 5 mA |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | LMP8645 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.33.0001 |
| Voltage - Supply Span (Min) | 2.7 V |
| Voltage - Supply Span (Max) | 12 V |
LMP8645MKX/NOPB current sense amplifier 1 Circuit SOT-23-THIN
The LMP8645MKX/NOPB from TI is a high-precision current sense amplifier designed to monitor small differential voltages across a shunt resistor in systems with high common-mode voltages. Operating from a 2.7V to 12V supply, this device accepts input signals ranging from -2V to 42V, making it robust for low-side and high-side sensing. It features a configurable gain set by a single external resistor, offering designers exceptional flexibility. Housed in a compact SOT-23-Thin package, this IC is optimized for space-constrained applications requiring accurate current monitoring without sacrificing power efficiency or speed.
The chip boasts a wide common-mode voltage range (-2V to 42V) and a high bandwidth of 990 kHz, ensuring fast response times. It delivers a low input offset voltage (1 mV max) and a maximum gain error of just 2%, including the external resistor. The amplifier provides a transconductance of 200 µA/V and a high CMRR of 95 dB, effectively rejecting noise. It operates over an extended temperature range (-40°C to 125°C) and includes a buffered output for low output impedance, making it highly reliable for industrial environments.
Selection Advantage
The LMP8645MKX/NOPB distinguishes itself through its unique combination of configurable gain and high-voltage capability in a miniature package. Unlike fixed-gain competitors, it allows engineers to optimize the gain resistor dynamically, reducing BOM costs and inventory. For higher voltage needs, the LMP8645HV variant supports up to 76V, providing a scalable platform for diverse power rails.
Alternative current monitor
For broader sourcing options, consider the MAX4172 (Maxim Integrated), a low-cost, high-side current-sense amplifier for portable equipment. The AD8210 (Analog Devices), which offers exceptional 0.5% gain accuracy and bi-directional operation, and the INA199 (Texas Instruments), a voltage-output device in a smaller SC-70 package for ultra-low power systems.
