TSL1402R Model Information

General Description

The TSL1402R is a 256×1 linear sensor array with a hold function, designed for high linearity and uniformity. It features a wide dynamic range of 4000:1 (72 dB) and operates up to 8 MHz. The device is powered by a single 3-V to 5-V supply and offers rail-to-rail output swing without requiring an external load resistor. It is intended for applications such as mark and code reading, OCR, contact imaging, edge detection, positioning, and optical measurement.

Key Features

Sensor Array

• 256×1 Sensor-Element Organization: Two sections of 128 photodiodes each.
• 400 Dots-Per-Inch (DPI) Sensor Pitch: High resolution for detailed imaging.
• High Linearity and Uniformity: Ensures accurate and consistent measurements.
• Wide Dynamic Range: 4000:1 (72 dB) for high contrast and detail.
• Low Image Lag: 0.5% typical, ensuring minimal residual signal.

Performance

• Operation to 8 MHz: High-speed operation for fast data acquisition.
• Single 3-V to 5-V Supply: Simplifies power requirements.
• Rail-to-Rail Output Swing: Full range output for maximum signal integrity.
• No External Load Resistor Required: Reduces component count and complexity.

Applications

• Mark and Code Reading: Accurate detection of marks and codes.
• OCR and Contact Imaging: High-resolution imaging for optical character recognition.
• Edge Detection and Positioning: Precise detection of edges and positions.
• Optical Measurement: General-purpose optical sensing.

Pin Configuration

Terminal Functions

TableCopy

Detailed Description

The TSL1402R consists of 256 photodiodes arranged in a linear array. Each photodiode generates photocurrent when exposed to light, which is integrated by associated charge amplifier circuitry. The device incorporates a pixel data-hold function that provides simultaneous integration start and stop times for all pixels. The output and reset of the integrators are controlled by a 256-bit shift register and reset logic.

Absolute Maximum Ratings

• Supply Voltage Range, VDD: -0.3V to 6V
• Input Voltage Range, VI: -0.3V to VDD + 0.3V
• Input Clamp Current, IIK: -20mA to 20mA
• Output Clamp Current, IOK: -25mA to 25mA
• Voltage Range Applied to Any Output in High Impedance or Power-Off State, VO: -0.3V to VDD + 0.3V
• Continuous Output Current, IO: -25mA to 25mA
• Continuous Current Through VDD or GND: -40mA to 40mA
• Analog Output Current Range, IO: -25mA to 25mA
• Maximum Light Exposure at 638nm: 5mJ/cm²
• Operating Free-Air Temperature Range, TA: -25°C to 85°C
• Storage Temperature Range, Tstg: -25°C to 85°C
• Lead Temperature 1.6mm (1/16 inch) from Case for 10 seconds: 260°C

Recommended Operating Conditions

• Supply Voltage, VDD: 3V to 5.5V
• Input Voltage, VI: 0V to VDD
• High-Level Input Voltage, VIH: 2V to VDD
• Low-Level Input Voltage, VIL: 0V to 0.8V
• Wavelength of Light Source, λ: 400nm to 1000nm
• Clock Frequency, fclock: 5kHz to 8MHz
• Sensor Integration Time, Parallel, tint: 0.03375ms to 100ms
• Sensor Integration Time, Serial, tint: 0.04975ms to 100ms
• Setup Time, Serial Input, tsu(SI): 20ns
• Hold Time, Serial Input, th(SI): 0ns
• Operating Free-Air Temperature, TA: 0°C to 70°C

Electrical Characteristics

• Analog Output Voltage (White, Average Over 256 Pixels): 1.6V to 2.4V
• Analog Output Voltage (Dark, Average Over 256 Pixels): 0V to 0.2V
• Pixel Response Nonuniformity (PRNU): ±10%
• Nonlinearity of Analog Output Voltage: ±0.4%
• Output Noise Voltage: 1mVrms
• Responsivity: 25V/(μJ/cm²) to 45V/(μJ/cm²)
• Analog Output Saturation Voltage (VDD = 5V): 4.5V to 4.8V
• Analog Output Saturation Voltage (VDD = 3V): 2.5V to 2.8V
• Saturation Exposure (VDD = 5V): 136nJ/cm²
• Saturation Exposure (VDD = 3V): 78nJ/cm²
• Dark Signal Nonuniformity (DSNU): 0.04V to 0.12V
• Image Lag: 0.5%
• Supply Current (VDD = 5V, Ee = 0): 6mA to 9mA
• Supply Current (VDD = 3V, Ee = 0): 5mA to 8mA
• High-Level Input Current (VI = VDD): 10μA
• Low-Level Input Current (VI = 0): 10μA
• Input Capacitance, SI: 5pF
• Input Capacitance, CLK: 10pF

Timing Requirements

• Setup Time, Serial Input (tsu(SI)): 20ns
• Hold Time, Serial Input (th(SI)): 0ns
• Pulse Duration, Clock High or Low (tw): 50ns
• Input Transition (Rise and Fall) Time (tr, tf): 0ns to 500ns
• Pixel Charge Transfer Time (tqt): 20μs

Mechanical Information

The TSL1402R is housed in a clear molded plastic package with a printed-circuit board. The package dimensions are as follows:

• Length: 19.30mm
• Width: 10.67mm
• Height: 1.29mm
• Pin Pitch: 2.54mm

Soldering Information

• Lead Temperature During Soldering: 260°C for 10 seconds at a distance of 1.6mm from the package body.
• Lead Clipping: Should be performed after solder attach to prevent pulling of the lead from the package body.
• Board Singulation: Care should be taken to prevent part bending during board singulation or final assembly.
• Surface Mount Operations: Should be completed first if the process includes both surface-mount parts and the TSL1402R.

Ordering Information

• Part Number: TSL1402R
• Package Type: 14-lead gold pin package