S200: Smart Feedback Device (SFD) Specifications

NOTE: Unless otherwise specified, the specifications are worse-case limits and apply over the specified operating ambient temperature and over the specified operating line voltage.

Position Signal

Parameter	Rating
Resolution/Rev (arc min)	24 bits = 0.0013
Repeatability (arc min RMS)	< ± 2^-19 Rev = ± 0.04
Noise
No Filtering (arc min RMS)	< ± 2^-17 Rev = ± 0.16
150 Hz Single Pole Filtered (arc min RMS)	< ± 2^-18 Rev = ± 0.08
10 Hz Single Pole Filtered (arc min RMS)	< ± 2^-19 Rev = ± 0.02
DC Offset Temperature Drift	< ± 2^-18 Rev/° C = 0.08 arc min/° C
Absolute Accuracy
AKM1 (arc min)	± 2^-10.3 Rev = ± 17
AKM2 or 3, 4 (arc min)	± 2^-11.1 Rev = ± 10
Communications Update Period (µs)	51.2

Velocity Signal

Parameter	Rating
Resolution (rpm)	< 0.001
Quanta (rpm)	0.07
Noise
No Filtering (arc min RMS)	< 4
150 Hz Single Pole Filtered (arc min RMS)	< 0.6
10 Hz Single Pole Filtered (arc min RMS)	< 0.06
DC Accuracy
Typical at 25° C (%)	± 0.01
Worse case (%)	± 0.05
Ripple
AKM1 (% p-p at 1200 rpm)	2.5
AKM2, 3, 4 (% p-p at 1200 rpm)	1.5
Offset (rpm)	< 0.0001
Communications Update Period (µs)	51.2
Hardware Interpolation Period (µs)	0.1

Emulated Encoder Output Signals

Parameter	Rating
Available Resolutions (PPR)
Binary	128, 512, 1024, 2048, 4096, 8192, 16384, 32768
Decimal	125, 500, 1000, 2000, 2500, 5000, 10000, 20000
Maximum Output Line Frequency (MHz)	2.5
Max Recommended Speed at 32768 PPR (rpm)	2200
Max Recommended Speed at 16384 PPR (rpm)	4600
Max Recommended Speed at 4096 PPR (rpm)	18300
Marker Pulse Width	~ 1 Quadrature Pulse

General SFD Specifications

Parameter	Rating
-3 dB Bandwidth (Hz)	> 2000
-45° Phase Lag (Hz)	> 1000
Max Tracking Rate (rpm)	> 48600
Max Recommended Rate (rpm)	25000
Max Tracking Acceleration (rpm/sec)	> 16 x 10⁶
Maximum Feedback Cable Length	50 m (164 ft)

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