3

LT1684

Note 1: Absolute Maximum Ratings are those values beyond which the life

of the device may be impaired.

Note 2: IC Supply current specification represents unloaded condition and

pins). Actual total IC bias currents will be higher and vary with operating

conditions. See Applications Information.

Note 3: PWM inputs are high impedance through

±100mV beyond the

input thresholds.

Note 4: 10k resistor from pin AMPIN to ground.

Note 5: Guaranteed but not tested.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply and Protection

DC Supply Current (Note 2)

IN A – IN B

≥ 1.6V

q

680

950

µA

Local Supply Voltages

q

6.5

10

V

–

Active Tracking Supply FET

q

13.2

14.0

14.8

V

Bias Voltage

Active Tracking Supply FET

q

–14.8

–14.0

–13.2

V

Bias Voltage

PWM Receiver

Input Carrier Frequency

10

kHz

Minimum Valid Differential Input

IN A – IN B or IN B – IN A

q

1.6

V

Differential Input Threshold

q

0.50

0.70

1.00

V

| IN A – IN B |

Differential Input Overdrive Impedance

q

710

k

Ω

(Note 3, 5)

Single-Ended Input Impedance

To Pin OUT

q

50

k

Ω

(Note 5)

BG Buffer

1.235

1.250

1.265

V

q

1.225

1.250

1.275

V

Output Offset Voltage

–7

7

mV

q

–10

10

mV

q

±2

±4.5

mA

– 2mA

0.2

Ω

q

160

300

ns

q

260

400

ns

q

– 200

–100

0

ns

q

340

500

ns

Transition to 10% Output (Rising Edge)

q

440

600

ns

Transition to 90% Output (Falling Edge)

q

– 200

–100

100

ns

Rising Edge – Falling Edge

Output Amplifier

OUT Offset Voltage

– 6

6

mV

q

–8

8

mV

OUT Output Impedance

–10mA

0.01

Ω

10mA

0.15

Ω

OUT Short-Circuit Current

q

±100

±190

mA

ELECTRICAL CHARACTERISTICS