This document describes the features and characteristics of the low-cost, voltage output, high-side current-sense amplifier ADM4073. It features three available gain versions (20 V/V, 50 V/V, 100 V/V), typical ±1.0% full-scale accuracy, 500μA supply current, wide 1.8 MHz bandwidth, 3V to 28V operating supply, wide 2V to 28V common-mode range, independent of supply voltage, -40°C to +125°C operating temperature range, and compatibility with MAX4073 in a 6-lead SOT-23 package. The ADM4073 is suitable for applications such as cell phones, PDAs, notebook computers, portable/battery-powered systems, smart battery packs/chargers, automotive, power management systems, PA bias control, general system/board-level current monitoring, and precision current sources.
The ADM4073 is a low‑cost, high‑side current‑sense amplifier designed for portable and battery‑powered applications such as cell phones, notebooks, and automotive power‑management systems. It offers three fixed gain versions (20 V/V, 50 V/V, 100 V/V) eliminating the need for external gain‑setting resistors, and its wide 2 V‑28 V common‑mode range is independent of supply voltage.
Key specifications include a 3 V‑28 V operating supply range, 1.8 MHz bandwidth, typical supply current of 0.5 mA, and operation over –40 °C to +125 °C. The device is supplied in a 6‑lead SOT‑23 package and is pin‑compatible with the MAX4073.
| Operating Voltage Range | 3 V to 28 V |
|---|---|
| Common‑Mode Input Range | 2 V to 28 V |
| Supply Current | 0.5 mA typical, 1.2 mA max |
| Bandwidth | 1.8 MHz |
| Gain Options | 20 V/V, 50 V/V, 100 V/V |
| Output Resistance | 12 kΩ |
| Power Supply Rejection Ratio (PSRR) | 78 dB (typical) |
| Operating Temperature Range | –40 °C to +125 °C |
| Package | 6‑lead SOT‑23 |
Typical supply current is 0.5 mA, rising to about 1.2 mA at a 28 V supply.
The device is offered in three fixed‑gain versions: 20 V/V (ADM4073T), 50 V/V (ADM4073F) and 100 V/V (ADM4073H).
It is rated for operation from –40 °C up to +125 °C.
The part is supplied in a 6‑lead SOT‑23 surface‑mount package.