High-Bandwidth Automotive Transimpedance Amplifier with Fast Output Recovery and Input Current Clamp for LiDAR

The MAX40660/MAX40661 are transimpedance amplifiers for optical distance measurement receivers in LiDAR applications. Low noise, high gain, low group delay, and fast recovery from overload make these TIAs ideal for distance-measurement applications. Important features include 2.1pA input-referred noise density (MAX40660), an internal input clamp, pin-selectable 25kΩ and 50kΩ transimpedance, and wide bandwidth (490MHz (typ) for the MAX40660 with 0.5pF input capacitance and 25kΩ transimpedance; 160MHz (typ) for the MAX40661 with 10pF input capacitance). An offset current input allows optional adjustment of input offset current. A low-power/standby control input reduces the supply current by better than 80% to help reduce average power supply current between pulses. The MAX40660/MAX40661 transimpedance amplifiers feature AEC-Q100 qualification over the -40°C to +125°C automotive operating temperature range and are available in a 3mm x 3mm, 10-lead TDFN package with side-wettable flanks, making them excellent choices for automotive LiDAR applications.

In addition to the TDFN package, the MAX40660 is available as bare die.

Applications

* Automotive Applications * Autonomous Driving Systems * Industrial Safety Systems * LIDAR Receivers * Optical Distance Measurement

* AEC-Q100

* Enables ASIL Compliance (FMEDA Available UponRequest)

* MAX40660

* Optimized for CIN = 0.25pF to 5pF

* Bandwidth = 490MHz (Typ)

* MAX40661

* Optimized for CIN = 5pF to 12pF

* Bandwidth (CIN = 10pF) = 160MHz (Typ), 100MHz (Min)

* Low Noise

* Two Pin-Selectable Transimpedance Values

* 25kΩ

* 50kΩ

* Internal Clamp For Input Current Up To 2A (Transient)

* Fast Overload Recovery: 2ns at 100mA

* Offset Input Provides Offset Adjust Feature

* LP Input Reduces Power Dissipation Between Pulses

* 3.3V Operation

* 10-Pin TDFN (Side-Wettable) or Bare Die