XtremeSense™ High-Linearity, High-Resolution TMR Current Sensor

with FLAG Output in Miniature Form Factor

CT220

13

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

CT220RMx (±15.0 mT) ELECTRICAL CHARACTERISTICS: Valid for VDD = 2.7 to 5.5 V, CBYP = 1.0 µF, and TA = –40°C to

125°C, typical values are VDD = 5.0 V and TA = 25°C, unless otherwise specified

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

ANALOG OUTPUT

Gain

G

VDD = 5.0 V, TA = 25°C

145

150

155

mV/mT

VDD = 3.3 V, TA = 25°C

95.7

99

102.3

mV/mT

Current Sensing Range

BANA

–15

–

+15

ADC

RESOLUTION

Resolution

RES

ITRACE = 3.5 A[1]

–

5.0

–

mA

TOTAL OUTPUT ERROR PERFORMANCE

Total Output Error for CT220RMC [2]

ETOT_PMC

TA = 0°C to 125°C

–

±0.5

±1.0

% FS

TA = –40°C to 125°C

–

±0.5

±3.0

% FS

Total Output Error for CT220RMV [2]

ETOT_PMV

TA = 0°C to 125°C

–

±0.5

±1.5

% FS

TA = –40°C to 125°C

–

±0.5

±5.0

% FS

TOTAL OUTPUT ERROR COMPONENTS

Non-Linearity

eLIN

BANA = ±15.0 mT, TA = –40°C to 125°C

–

±0.30

–

% FS

Temperature Coefficient of Sensitivity

for CT220RMC [3]

TCSPMC

TA = 0°C to 125°C

–

–70

–

ppm/°C

TA = –40°C to 125°C

–

–150

–250

ppm/°C

Temperature Coefficient of Sensitivity

for CT220RMV [3]

TCSPMV

TA = 0°C to 125°C

–

–100

–

ppm/°C

TA = –40°C to 125°C

–

–200

–400

ppm/°C

Temperature Coefficient of Offset

Voltage [3]

TCO

TA = –40°C to 125°C, VDD = 5.0 V

–

100

–

ppm/°C

NOISE

Input Referred Noise [3]

eN

fBW = 1 Hz to 30 kHz, VDD = 5.0 V

–

2.38

–

µTRMS

–

0.36

–

mVRMS

[1]

Measurement result from EVB222 (top trace on PCB), CT220 evaluation board.

[2]

Reference section CT220 Calibration Guide.

[3]

Guaranteed by design and characterization; not tested in production.