General Description
The MAX40016 is a very wide range current sense amplifier
(CSA) with internal sense element that senses from less
than 300µA to greater than 3A current range. The 4-decade
sensed current functions with 1% (typical) gain error and
offers three, multiplexed programmable output ranges in
order to interface with 12-bit ADCs. Having an integrated
sense element has the extra advantage that the entire
current measuring path can be factory-trimmed, saving the
user from having to calibrate independent sense resistors
and CSAs. The MAX40016 drops a typical of 60mV at 3A
from the voltage input to load output .
The MAX40016's integrated current-sensing element
saves the space and cost of an external high-power,
precision current sense resistor. The MAX40016 is offered
in an ultra-tiny, 1.98mm x 1.31mm, 15-bump wafer-level
package (WLP), further reducing board space.
The MAX40016 operates with a supply voltage from 2.5V
to 5.5V. The device features a low-power mode in which
the current-sensing element remains on, but the outputs
are turned off to reduce the total supply current below
10µA (max).
The MAX40016 also includes a committed on-board
amplifier with an internal gain of 1.5V/V. The MAX40016
operates over the -40°C to +125°C temperature range.
Applications
● Mobile Devices
● RF Power Monitoring
● Portable Instruments
Ordering Information appears at end of data sheet.
19-100232; Rev 0; 1/18
Benets and Features
● Integrated Current Sense Element Saves The Space
and Cost of Expensive Precision Sense Resistors
● 4-Decade Measurement Range
• Maintains Accuracy from < 300µA to > 3A
● Withstands Overloads to 4A
● Low Voltage Drop Across Sense Element
• 60mV (Active Mode, 3A Load)
• 35mV (Low Power Mode, 3A Load)
● Three Multiplexed Scaling Resistor Outputs Allow
Full Dynamic Range while Interfaced to 12-bit ADCs
● +2.5V to +5.5V Input Supply Voltage Range
● Low Power Mode Reduces Supply Current to 10µA
Max
● Tiny 1.98mm x 1.31mm, 15-Bump, WLP
● -40°C to +125°C Operating Temperature Range
MAX40016 4-Decade Current Sense Amplier
with Internal R
SENSE
EVALUATION KIT AVAILABLE
