Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Slide 10 Slide 11 Slide 12 Slide 13 Slide 14 Product List
MAX44284 Current Sense Amplifier Slide 12
Analog Devices' MAX44284 evaluation kit (EV kit) provides a proven design to evaluate the MAX44284 high-precision, low-power, current-sense amplifier which offers precision accuracy specifications of input offset voltage (VOS) less than 2 μV (max) and gain error less than 0.05% (max). This EV kit demonstrates the MAX44284 in an ultra-small, 1.3 mm x 0.9 mm, 6-bump WLP package. The EV kit PCB comes with a MAX44284HAWT+ installed, which is the 100 V/V gain version. Other gain options are available. Contact Analog Devices for the pin-compatible MAX44284FAWT+ (G = 50 V/V), MAX44284WAWT+ (200 V/V), and MAX44284EAWT+ (G = 500 V/V). The engineer requires an electronic load capable of sinking 1 A (i.e., HP6060B) and two digital voltmeters in order to evaluate this EV kit. The EV kit is installed with a MAX44284H, which has a 100 V/V gain. The current-sense resistors (RSENSE) value is 0.05 Ω with ±0.5% tolerance. The VOUT for each channel given by: VOUT = ILOAD x RSENSE x AV  where AV is the gain and ILOAD is the current load applied to the device. Normal operating VRS+ and VRS- range is -0.1 V to +36 V. The load current is measured as a voltage drop (VSENSE) across an external sense resistor. This voltage is then amplified by the current-sense amplifier and presented at its VOUT_ pin. By minimizing both offset and gain errors, MAX44248 solutions enable accuracy to be optimized over a wide dynamic range.
PTM Published on: 2015-02-13