General Note

TT Electronics reserves the right to make changes in product specification without

notice or liability. All information is subject to TT Electronics’ own data and is

considered accurate at time of going to print.

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Rev C, 4/27/2023

Page 8

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FlexSense® I-Series Programmable

Incremental Encoder

FS210/FS310 Datasheet

3

Tj > TjAL causes the interrupt status bit INTR<5> to be set to 'b1 and the IRQZ pin level to be driven to 'b0 if the

interrupt mask bit INTR<1> is 'b1 but does NOT disable output drivers nor turn off on-chip static current consumption.

Once the alarm threshold is tripped, the effects persist until the user executes an I2C read access to the INTR register or

until a power-on reset event occurs.

4

The specified supply current for a particular supply (VDD or VDDA) refers to the sum of the currents sunk by all pins

connected to that supply since there are multiple pins for each supply.

5

Configured to produce 1Vp-p quad-track analog voltages with as close zero differential DC offset as possible; low-noise

mode (ZCFG<6> = 1) unless otherwise indicated.

6

Negative value implies current is flowing out of the pin.

7

Assuming photocurrents are perfect sinusoids in perfect quadrature - i.e. negligible THD attributable to non-ideality in

pixel pattern or mechanical effects.

8

Deviation from 90° of phase difference between differential A and B analog output voltages or between AOUT_P_DIG

and BOUT_P_DIG.

9

With reference to Figure 3

10

Measurable only by placing a low-impedance current meter between LEDK and LEDC pins at the package level or by

measuring the current into LEDA. Room temperature is assumed for typical conditions and 125°C is assumed for max

conditions.

11

Nominal value of 1 LSB is 0.6mA.

τP

τCC

τCC

DQ

τφ

τφ

τφ

AOUTP_DIG

BOUTP_DIG

Figure 3: Jitter specification diagram; with τP as time period, τCC as a similar time used to calculate cycle-to-cycle jitter, DQ as

the duty cycle, and τΦ as time of the phase difference between A and B. The phase error, εΦ, can be calculated as

360(τΦ/τP).