IC-PN2656_10 Datasheet, PDF (2/7 Pages) IC-Haus GmbH – PHASED ARRAY NONIUS ENCODER 26-256

iC-PN2656
preliminary
PHASED ARRAY NONIUS ENCODER 26-256
Rev B2, Page 2/7
DESCRIPTION
The optical encoder iC-PN2656 features 24 mono-
lithically integrated photosensors arranged as a
phased-array. The high transimpedance gain of typ-
ically 4 MΩ generates output signals of a few hun-
dred millivolts already from illumination levels of 1 to
2 mW/cm². In most cases no additional measures
must be considered to filter for noise and interfer-
ences.
Analog nonius-scale encoders are the typical appli-
cation for iC-PN2656. Its 3-track scanning features a
phased-array of 8 photosensors each per track, gen-
erating positive and negative going sine signals, as
well as positive and negative going cosine signals.
An excellent matching and common mode behavior
of the differential signal paths is obtained by a paired
amplifier design, reducing the needs for external sig-
nal calibration to an absolute minimum.
The spectral sensitivity range includes visible to near
infrared light, with the maximum sensitivity being
close to a wavelength of 680 nm. An output voltage
of approximately 1 V is typical under low light condi-
tions, for instance when iC-PN2656 is illuminated at
only 1.3 mW/cm² by an 740 nm LED.
PACKAGES INFORMATION
PAD LAYOUT (2.88 mm x 3.37 mm)
PAD FUNCTIONS
No. Name Function
1 VCC +4.5..5.5 V Supply Voltage
2 VREF Reference Voltage Output
3 PS_N N-Track Sine +
4 NS_N N-Track Sine -
5 PS_M M-Track Sine +
6 NS_M M-Track Sine -
7 PS_S S-Track Sine +
8 NS_S S-Track Sine -
9 NC_S S-Track Cosine -
10 PC_S S-Track Cosine +
11 NC_M M-Track Cosine -
12 PC_M M-Track Cosine +
13 NC_N N-Track Cosine -
14 PC_N N-Track Cosine +
15 GND Ground
All outputs are analog voltage outputs.