ADA4570BRZ-R7 datasheet(4/14 Pages) AD

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Data Sheet

ADA4570

SPECIFICATIONS

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Rev. 0 | 4 of 14

Table 1.

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

Output Short-Circuit Current10 (ISC)

Short to GND per output pin,

VDD = 5.0 V, TA = 25°C

Short to VDD per output pin,

VDD = 5.0 V, TA = 25°C

POWER SUPPLY

Supply Voltage Range (VDD)

2.7

5.5

Supply Current Range (IDD)

2.9

4.5

6.3

No load

Power-Up Time (tPWRUP)

150

μs

The time measured between VDD

reaching 90% of the supply voltage

and angular measurement result being

within 2° of the final angle

TEMPERATURE SENSOR

Error Over Temperature (TERR)

°C

Temperature Voltage Range (TRANGE)

% VDD

TA = −40°C to +150°C

Temperature Coefficient (TCO)

3.173

mV/V/°C

VTEMP Output Voltage Range

% VDD

TA = 25°C

VTEMP Output Impedance

600

Ω

Buffered output

VTEMP Load Capacitance

Optional load capacitance

VTEMP Short-Circuit Current (ISC_VTEMP)

Short-circuit to GND, VDD = 5.0 V,

TA = 25°C

LOAD CAPACITOR

External Differential Load Capacitance11 (CL)

1 αUNCORR is the total mechanical angular error after the arctan computation. This error includes all sources of error over temperature before calibration. Error components

such as offset, amplitude synchronism, amplitude synchronism drift, thermal offset drift, phase error, hysteresis, orthogonality error, and noise are included.

2 αCAL is the total mechanical angular error after the arctan computation. This error includes all sources of error over temperature after an initial offset (nulling) is performed

at TA = 25°C. Error components such as amplitude synchronism drift, amplifier gain matching, thermal offset drift, phase error, hysteresis, orthogonality error, and noise are

included.

3 Magnetic field rotation frequency = 1000 rpm.

4 αDYNAMIC is the total mechanical angular error after the arctan computation. This error includes all sources of error over temperature after a continuous background

calibration is performed to correct offset and amplitude synchronism errors. Error components such as phase error, hysteresis, orthogonality error, noise, and lifetime drift

are included.

5 Applies to the VSIN+, VSIN−, VCOS+, and VCOS− outputs.

6 Broken bond wire detected.

7 Peak-to-peak amplitude matching. k = 100 × VSIN/VCOS.

8 Magnetic field rotation frequency = 30000 rpm.

9 Rotation frequency dependent phase error after offset correction, amplitude calibration, and arctan calculation.

10 The short-circuit condition specified is present for each output at the following mechanical angles: short to VDD with VSIN+ at α = 135°, VSIN− at α = 45°, VCOS+ at α = 0°,

and VCOS− at α = 90° and short to GND with VSIN+ at α = 45°, VSIN− at α = 135°, VCOS+ at α = 9°, and VCOS− at α = 0°.

11 Solder CL/4 between VSIN+ and VSIN− and between VCOS+ and VCOS−. Solder CL/2 between VSIN+ to GND, VSIN− to GND, VCOS+ to GND, and VCOS− to GND.

Solder close to package.

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