AEDR-871x (Digital)/AEDR-872x (Analog) Encoder Devices
Broadcom features their 3-channel reflective encoder with analog and digital outputs
Broadcom's AEDR-871x and AEDR-872x are 3-channel reflective optical encoder devices providing dual channel quadrature digital outputs (AEDR-871x) and analog outputs (AEDR-872x) along with an index channel digital output. With encoding resolution up to 318 lines per inch (LPI) and built-in 4x, 8x, and 16x interpolation, the device enables great flexibility and versatility in resolution range. The quadrature (AB) digital outputs are TTL-compatible enabling the device to interface directly with many digital signal processors (DSP) and host processors. The differential analog outputs (Sin, /Sin, Cos, /Cos) can interface directly with most commercially available interpolator devices for high precision motion control measurements. As such, the device can be easily designed in and integrated into existing motion control system.
The AEDR-871x/872x house an LED light source and a photo-detecting circuitry in a compact package. The miniature package coupled with low operating voltage options, 3.3 V (AEDR-871x) and 5.0 V (AEDR-872x), which allow these devices to be used in a wide range of space-constrained, low-power applications like portable devices in which space and power dissipation are primary concern. The device is designed to operate over -20°C to +85°C temperature range suitable for both commercial and industrial end applications.