General Description
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
● Optical Distance Measurement
● LiDAR Receivers
● Industrial Safety Systems
● Autonomous Driving Systems
● Automotive Applications

Benefits and Features
● AEC-Q100
● Enables ASIL Compliance (FMEDA Available upon
Request)
● 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