XtremeSense™ TMR Contactless Current Sensor

with 1 MHz Bandwidth and Programmable Gain

CT450

13

Allegro MicroSystems

955 Perimeter Road

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

www.allegromicro.com

CT450-x12MR: ±12 mT – ELECTRICAL CHARACTERISTICS: Valid for VCC = 4.75 to 5.50 V, CBYP = 1.0 µF, and TA = –40°C

to 125°C, typical values are VCC = 5.00 V and TA = 25°C, unless otherwise specified

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Magnetic Field Range

BRNG

–12

–

12

mT

Voltage Output Quiescent

VOQ

TA = 25°C, BOP = 0 mT

2.490

2.500

2.510

V

Sensitivity

S

BRNG(MIN) < BOP < BRNG(MAX)

–

166.7

–

mV/mT

Bandwidth [1]

fBW

Small Signal = –3 dB

–

1.0

–

MHz

Noise [1]

eN

TA = 25°C, fBW = 100 kHz

–

0.75

–

mVRMS

–

4.50

–

µTRMS

OUT ACCURACY PERFORMANCE

Non-Linearity Error

ELIN

–

±0.1

–

% FS

Sensitivity Error

ESENS

–

±0.3

–

% FS

Offset Voltage

VOFFSET BOP = 0 mT

–

±0.2

–

% FS

LIFETIME DRIFT

Total Output Error Lifetime Drift

ETOT_DRIFT

–

±1.0

–

% FS

[1]

Guaranteed by design and characterization; not tested in production.

ELECTRICAL CHARACTERISTICS FOR CT450-x12MR

VCC = 5.0 V, TA = 25°C, and CBYP = 1.0 µF (unless otherwise specified)

Figure 20: Total Output Error vs. B Field vs.

Temperature

Figure 21: Noise Density vs. Frequency