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Broadcom AEDR 9940 102 three channel reflective incremental encoder offering selectable analog and digital outputs

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Broadcom AEDR 9940 102 three channel reflective incremental encoder offering selectable analog and digital outputs

Broadcom AEDR-9940 Three-Channel Reflective Incremental Encoder

The AEDR-9940 is a versatile three-channel reflective optical encoder offering selectable and programmable options for digital or analog differential outputs. It can interface directly with external interpolators in analog mode, providing Sine+, Sine-, Cos+, Cos-, I+, and I- outputs. In digital mode, it delivers two-channel (AB) quadrature outputs and a third channel digital index output, compatible with TTL signal processing circuitry for easy integration. Designed for a wide operating temperature range and small form factor, it is suitable for commercial, industrial, and automotive applications.

Product Attributes

  • Brand: Broadcom
  • Model: AEDR-9940
  • Type: Three-Channel Reflective Incremental Encoder
  • Output Options: Analog or Digital Differential
  • Package: Surface-mount leadless (4.0 mm x 4.0 mm x 0.7 mm)
  • Operating Temperature: -40C to 115C
  • Certifications: Not specified in the provided text.
  • Material: Not specified in the provided text.
  • Color: Not specified in the provided text.

Technical Specifications

ParameterValueUnitNotes
High Encoding Resolution198.4375LPI (lines/inch)or 7.8125 LP mm (lines/mm) or 0.128 mm (pitch)
Operating Voltage3.3V, 5.0VVSupply
Supply Voltage (VCC)3.0 - 3.6 (3.3V) / 4.5 - 5.5 (5.0V)VRipple <100 mVpp
Current Consumption (ICC)45mADependent on spatial position and rotational speed
Maximum Output Frequency (External Mode Selection)0.25 - 4.00MHzInterpolation dependent (1X to 128X)
Maximum Output Frequency (SPI Programmable)4.00MHzInterpolation 16X
Tangential Misalignment (ET)0.35mmCPR dependent, with AutoCal variations
Radial Misalignment (ER)0.35mm
Code Wheel Gap (G)0.85 - 2.35mmTypical for 625 CPR, variations for 128 CPR
Specular Reflectance (Rf)60%%Reflective area
Non-reflective area5%%
Tri-state Voltage Threshold High90%VCC
Tri-state Voltage Threshold Low10%VCC
Tri-state Voltage Threshold Open30 - 70%VCC
Storage Temperature (TS)-40 to 125C
Operating Temperature (TA)-40 to 115C
Supply Voltage (VCC) Absolute Max5.5V
Pin Current (All I/O Outputs)-20 to 20mA

Applications

  • Closed-loop stepper motors
  • Small motors, actuators
  • Industrial printers
  • Robotics
  • Card readers
  • PTZ camera
  • Portable medical equipment
  • Optometric equipment
  • Linear stages

2512221405_Broadcom-AEDR-9940-102_C39751428.pdf

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