Transimpedance Amplifiers with Selectable Gain and Input Current Clamp

The MAX40213 is a transimpedance amplifier for optical distance measurement receivers in LiDAR applications. Low noise, high gain, low group delay, and fast recovery from overload make this TIA ideal for distance-measurement applications. Important features include 1.1pA/√Hz input-referred noise density, an internal 2A input clamp, pin-selectable 150kΩ and 750kΩ transimpedance (into a 1kΩ load), and wide bandwidth (300MHz, typ). An offset current input allows optional adjustment of input offset current. The MAX40213 has a shutdown (SD) control input that reduces the supply current to 0.01μA. This transimpedance amplifier is available in a 8-bump WLP, and is specified over the -40°C to +85°C operating temperature range.

Applications

* Industrial Safety Systems * LIDAR Receivers * Optical Distance Measurement

* Optimized for CIN = 0.25pF to 5pF * Bandwidth = 300MHz (typ) * 1.1pA/√Hz Input-Referred Noise * Two Pin-Selectable Transimpedance Values (RL = 1kΩ)

* 150kΩ * 750kΩ

* Internal Clamp for Input Current up to 2A (Transient) * Fast Overload Recovery: 25ns at 100mA * Offset Input ​Provides Offset Adjust Feature * SD Input Shuts Down Internal Circuitry * 3.3V Operation * 1.75mm x 1.24mm, 8-Bump WLP