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AS5245

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

to ±10%. Generally, the timing tolerance has no influence in the accuracy or resolution of the system, as it is used mainly for internal clock

generation. The only concern to the user is the width of the PWM output pulse, which relates directly to the timing tolerance of the internal

oscillator. This influence, however, can be cancelled by measuring the complete PWM duty cycle instead of just the PWM pulse.

9.7 AS5245 Differences to AS5045

All parameters are according to AS5045 data sheet except for the parameters shown below:

Table 15. Difference Between AS5245 and AS5045

Building Block

AS5245

AS5045

Resolution

12bits, 0.088º/step.

12bits, 0.088º/step.

Ambient temperature range

-40ºC to +150ºC

-40ºC to +125ºC

Data length

read: 18bits

(12bits data + 6 bits status)

OTP write: 18 bits

(12bits zero position + 6 bits mode selection)

read: 18bits

(12bits data + 6 bits status)

OTP write: 18 bits

(12bits zero position + 6 bits mode selection)

Pins 1 and 2

MagINCn, MagDECn: same feature as AS5045,

additional OTP option for red-yellow-green magnetic

range

MagINCn, MagDECn

Incremental encoder

Pin3 (DTest1_A); Pin 4 (DTest2_B); Pin 6 (Mode_Index)

2x1024 ppr (12-bit)

2x256 ppr low-jitter (10-bit)

Not used

Pin 3: not used

Pin 4:not used

Pin 6

MODE_Index pin selects fast or slow mode in the

default configuration. In case of incremental mode, the

fast mode is selected and the pin is configured as

output.

MODE_Index pin selects fast or slow mode in the

default configuration.

Pin 12

PWM output: frequency selectable by OTP:

1µs / step, 4096 steps per revolution, f=244Hz 2µs/

step, 4096 steps per revolution, f=122Hz

PWM output: frequency selectable by OTP:

1µs / step, 4096 steps per revolution, f=244Hz

2µs/ step, 4096 steps per revolution, f=122Hz

Sampling frequency

selectable by MODE input pin:

2.5kHz, 10,4kHz

selectable by MODE input pin:

2.5kHz, 10,4kHz

Propagation delay

384µs (slow mode)

384µs (slow mode)

96µs (fast mode)

96µs (fast mode)

Transition noise

(rms; 1sigma)

0.03 degrees maximum (slow mode)

0.03 degrees maximum (slow mode)

0.06 degrees maximum (fast mode)

0.06 degrees maximum (fast mode)

OTP programming options

PPTRIM; programming voltage 3.3V – 3.6V <70ºC;

3.5V – 3.6V >70ºC;

52-bit serial data protocol; CSn, PDIO and CLK

EasyZap; programming voltage 7.3V – 7.5V; Csn;

Prog and CLK; 16-bit (32-bit) serial data protocol;