TSL257T Datasheet, PDF (1/10 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – HIGH-SENSITIVITY LIGHT-TO-VOLTAGE CONVERTER

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D Converts Light Intensity to Output Voltage
D Monolithic Silicon IC Containing
Photodiode, Operational Amplifier, and
Feedback Components
D High Sensitivity
D Single Voltage Supply Operation (2.7 V to
5.5 V)
D High Irradiance Responsivity . . . Typical
680 mV/(μW/cm²) at λ_p = 640 nm
D Low Noise (200 μVrms Typ to 1 kHz)
D Rail-to-Rail Output
D High Power-Supply Rejection (35 dB at
1 kHz)
D Low-Profile Surface-Mount Package
D RoHS Compliant
TSL257T
HIGH-SENSITIVITY
LIGHT-TO-VOLTAGE CONVERTER
TAOS065B − APRIL 2007
PACKAGE T
4-LEAD SMD
(TOP VIEW)
N/C 1
GND 2
4 OUT
3 V_DD
Description
The TSL257T is a high-sensitivity low-noise light-to-voltage optical converter that combines a photodiode and
a transimpedance amplifier on a single monolithic CMOS integrated circuit. Output voltage is directly
proportional to light intensity (irradiance) on the photodiode. The TSL257T has a transimpedance gain of
320 MΩ. The device has improved offset voltage stability and low power consumption and is supplied in a
compact 4-lead surface-mount package.
Functional Block Diagram
−
Voltage
+
Output
Terminal Functions
TERMINAL
NAME
T PKG
NO.
GND
2
OUT
4
V_DD
3
N/C
1
DESCRIPTION
Power supply ground (substrate). All voltages are referenced to GND.
Output voltage.
Supply voltage.
No connection.
The LUMENOLOGY r Company
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972_r) 673-0759
www.taosinc.com
Copyright E 2007, TAOS Inc.
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