DRV401AMDWPREP datasheet(4/33 Pages) TI

4 / 33 page

DRV401-EP

SBVS104 – JANUARY 2008............................................................................................................................................................................................... www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

Boldface limits apply over the specified temperature range: TJ = –55°C to +125°C.

At TA = +25°C and VDD1 = VDD2 = +5 V with external 100 kHz filter BW, and zero output current ICOMP, unless otherwise noted.

DRV401

PARAMETER

CONDITIONS

UNITS

MIN

TYP

MAX

FREQUENCY RESPONSE

BW–3dB

Bandwidth(5)

MHz

Slew rate(5)

CMVR = –1 V to = +4 V

6.5

µs

dV ± 2 V to 1%,

Settling time, large-signal(5)

0.9

µs

No external filter

Settling time(5)

dV ± 0.4 V to 0.01%

µs

INPUT RESISTANCE

Differential

16.5

23.5

Ω

Common-mode

Ω

External reference input

Ω

NOISE

Output voltage noise density, f = 1 kHz,

Compensation loop disabled

170

nV/

√Hz

RTO(5)

COMPENSATION LOOP

Probe f = 250 kHz,

DC STABILITY

RLOAD = 20 Ω

Deviation from 50% PWM,

Offset error(6)

0.03

Pin gain = L

Deviation from 50% PWM,

Offset error drift(5)

7.5

ppm/°C

Pin gain = L

Gain, pin gain = L(5)

|VICOMP1| – |VICOMP2|

–200

200

ppm/V

PSRR

Power-supply rejection ratio

Probe loop f = 250 kHz

500

ppm/V

FREQUENCY RESPONSE

Open-loop gain, two modes, 7.8 kHz

Pin gain H/L

24/32

PROBE COIL LOOP

Input voltage clamp range

Field probe current < 50 mA

–0.7

–0.7 to VDD

Internal resistor, IS1 or IS2 to VDD1

(5)

Ω

RHIGH

Internal resistor, IS1 or IS2 to GND1(5)

Ω

Resistance mismatch between IS1 and

RLOW

ppm of RHIGH + RLOW

300

1500

ppm

IS2(5)

Total input resistance(7)

134

200

Ω

Comparator threshold current(7)

Minimum probe loop half-cycle(5)

250

280

310

Probe loop minimum frequency

250

kHz

No oscillation detect (error) suppression

µs

COMPENSATION COIL DRIVER, H-BRIDGE

Peak current(5)

VICOMP1 – VICOMP2 = 4.0VPP

250

Voltage swing

Ω load

4.2

VPP

Output common-mode voltage

VDD2/2

Wire break detect, threshold current(8)

ICOMP1 and ICOMP2 railed

VOLTAGE REFERENCE

Voltage(5)

No load

2.495

2.5

2.505

Drift(5)

No load

±5

ppm/°C

(5)

See Typical Characteristics curves.

(6)

For VAC sensors, 0.2% of PWM offset approximately corresponds to 10 mA primary current offset per winding.

(7)

Total input resistance and comparator threshold current are inversely related. See Figure 2a.

(8)

See Compensation Driver section in Applications Information.

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