MAX9634HEUK+T

Series:	nanoPower
Packaging:	Tape & Reel (TR)
Part Status:	Active
Amplifier Type:	Current Sense
Number of Circuits:	1
Output Type:	--
Slew Rate:	--
Gain Bandwidth Product:	125kHz
Voltage - Input Offset:	100µV
Current - Supply:	1.1µA
Voltage - Supply, Single/Dual (±):	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	MAX9634

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MAX9634HEUK+T is an integrated digital output programmable transimpedance amplifier (TIA) from Maxim Integrated on a small 4 x 4 μm QFN package that measures 15.02 mm2. The device enables accurate measurement of photodiode current over a wide dynamic range. It is designed to be used in high-performance systems applications such as optical networking, datacom and telecom, medical diagnostics, and laser measurement systems.

Features

The MAX9634HEUK+T integrates the following features:• Wide transimpedance bandwidth (1.2GHz – 2.2GHz, 0.5V/nA to 8V/nA)• Programmable transimpedance accuracy (±1%, ±2%)• Low noise floor and distortion• Programmable AC/DC rejection• Integrated 30kΩ input circuit• Small package (4 x 4μm)

Application Field

The main application of MAX9634HEUK+T is to dramatically simplify the design of ultra-high performance systems requiring the accurate measurement of photodiode current over a wide dynamic range. It is typically used in applications such as:• Optical networking and datacom/telecom systems• Medical diagnostics and laser measurement systems• Spectroscopy

Working Principle

The MAX9634HEUK+T provides a high input transimpedance bandwidth and transimpedance accuracy for photodiode-based optical systems. Its integrated 30kΩ input circuit amplifies the received optical signal, converting it to a photodiode current and providing an output voltage. This output voltage is sent to a programmable gain amplifier, which provides gain and AC/DC rejection. The MAX9634HEUK+T controls the transimpedance gain of the programmable gain amplifier through an SPI interface. The device is capable of providing the simplest, highest accuracy transimpedance output in the industry and it achieves the highest SNR possible while consuming very low power.

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