Specifications
67Sensors: Featured Products
Maximize System Accuracy in Photodiode and
High-Ohmic Sensor Applications
MAX9945
The MAX9945 operational amplier features an excellent combination
of low-operating power and low-input-voltage noise. MOS inputs
enable the MAX9945 to feature low 50fA input-bias currents and low
(15nV/√Hz) input-current noise. The MAX9945 simplies the interface
between high-ohmic sensors or low-current TIA applications.
Benefits
• Improves system’s signal-to-noise
ratio (SNR) for more accurate
measurements
◦ 50fA low input-bias current
◦ 1fA/√Hz low input-current noise
◦ 15nV/√Hz low noise
• High-voltage robust design simplifies
mixed-voltage designs
◦ 4.75V to 38V single-supply voltage
range
◦ ±2.4V to ±19V dual-supply voltage
range
◦ Rail-to-rail output-voltage swing
IN-
IN+
OUT
V
EE
V
CC
PHOTODIODE
SIGNAL
CONDITIONING/
FILTERS
ADC
MAX9945
Highly accurate light-sensor interface features the MAX9945 op amp.
For more information on Maxim’s optical communication products, please go to: www.maxim-ic.com/fiber.