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PDF TSL257 Data sheet ( Hoja de datos )
| Número de pieza | TSL257 | |
| Descripción | High-Sensitivity Light-to-Voltage Converter | |
| Fabricantes | ams | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TSL257 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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TSL257
High-Sensitivity Light-to-Voltage
Converter
General Description
The TSL257 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 TSL257 has
a transimpedance gain of 320MΩ. The device has improved
offset voltage stability and low power consumption and is
supplied in a 3-lead clear plastic sidelooker package with an
integral lens. When supplied in the lead (Pb) free package, the
device is RoHS compliant.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Added Value of Using TSL257
Key Benefits & Features
The benefits and features of TSL257, High-Sensitivity
Light-to-Voltage Converter are listed below:
Benefits
• Enables Extremely Fast Response to Change
• Enables Fast Response to Visible Light in
Range of 400nm to 700nm Wavelengths
• Provides for High Sensitivity to Detect a Small
Change in Light
• Provides Additional Sensitivity Advantages
• Provides Full Dynamic Range
Features
• Single Photo-Diode and Trans Impedance Architecture
• 160μs Output Rise-Time Response
• High Irradiance Responsivity:
Typically 1.68V/(μW/cm2) at λp = 645nm
• 2x Gain Lens
• Rail-To-Rail Output Swing
• Converts Light Intensity to Output Voltage
• Monolithic Silicon IC Containing Photodiode, Operational
Amplifier, and Feedback Components
• High Sensitivity
• Single Voltage Supply Operation (2.7V to 5.5V)
• Low Noise (200μVrms Typ to 1kHz)
• High Power-Supply Rejection (35dB at 1kHz)
• Compact 3-Leaded Plastic Package
• RoHS Compliant (-LF Package Only)
ams Datasheet
[v1-00] 2016-Jul-25
Page 1
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1 page  
TSL257 − Electrical Characteristics
Electrical Characteristics
All limits are guaranteed. The parameters with min and max
values are guaranteed with production tests or
SQC (Statistical Quality Control) methods.
Figure 7:
Recommended Operating Conditions
Operating Conditions
All defined tolerances for external components in this
specification need to be assured over the whole operation
condition range and also over lifetime.
Symbol
VDD
TA
Parameter
Supply voltage
Operating free-air temperature range
Min
2.7
0
Nom
Max
5.5
70
Unit
V
°C
Figure 8:
Electrical Characteristics at VDD = 5V, TA = 25°C, λp = 470nm, RL = 10kΩ (unless otherwise noted) (1) (2)
Symbol
Parameter
Test Conditions Min Typ Max
Unit
VD Dark voltage
Ee = 0
0 15 mV
VOM
Maximum output voltage
swing
VDD = 4.5V, No Load
VDD = 4.5V, RL = 10kΩ
4
4.49
4.2
V
VO Output voltage
Ee = 1.54μW/cm2,
λp = 470nm (4)
1.6 2 2.4
V
αVD
Temperature coefficient of
dark voltage (VD)
TA = 0°C to 70°C
-15 μV/°C
λp = 428nm (3), (7)
1.18
Ne Irradiance responsivity
λp = 470nm (4), (7)
λp = 565nm (5), (7)
1.30 V/
1.58 (μW/cm2)
λp = 645nm (6), (7)
1.68
ams Datasheet
[v1-00] 2016-Jul-25
Page 5
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5 Page 
TSL257 − Application Information
Application Information
PCB Pad Layout
Suggested PCB pad layout guidelines for the SM surface mount
package are shown in Figure 15.
Figure 15:
Suggested SM Package PCB Layout
1.0 1.0 1.0
3.2
1.0 1.0
Note(s):
1. All linear dimensions are in millimeters.
2. This drawing is subject to change without notice.
ams Datasheet
[v1-00] 2016-Jul-25
Page 11
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11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet TSL257.PDF ] | |
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