LT3669 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT3669

IO-Link Transceiver with Integrated Step-Down Regulator and LDO

Linear Technology 

TYPICAL PERFORMANCE CHARACTERISTICS

Receiver Thresholds

13

12

VTHH

11

10

VTHL

9

8

7

6

5

4

3

2

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

36692 G36

Receiver Thresholds

13

12

VTHH

11

10

VTHL

9

8

7

6

5

4

3

2

5 10 15 20 25 30

VL+ (V)

35 40

36692 G37

LT3669/LT3669-2

CQ1, Q2 Pin Leakage Current

VTXEN < 0.4V

4.0

VL+ :

3.5

18V

24V

30V

3.0

40V

2.5

2.0

1.5

1.0

0.5

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

36692 G38

Line Driver Current Limit

400

350

RILIM = 42.2kΩ

300

250

200

150

VILIM ≤ 0.3V

100

50

0

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

36692 G39

Line Driver Pulsing On-Time/

Off-Time

2.4

2.2

PULSING OFF-TIME

2.0

1.8

1.6

1.4

1.2

PULSING ON-TIME, VRQH,L = 5V

1.0

0.8

0.6

0.4

0.2

0

–50

PULSING ON-TIME, VRQH,L = 24V

PULSING ON-TIME, VRQH,L = 40V

–25 0 25 50 75 100 125 150

TEMPERATURE (°C)

36692 G42

Line Driver Residual Voltage

1.8

VRQH

VRQL

1.6

IQ = ±250mA

1.4

1.2

1.0 IQ = ±100mA

0.8

0.6

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

36692 G40

Line Driver Residual Voltage

1.6

1.4

1.2

VRQL

1.0

VRQH

0.8

0.6

0.4

0.2

0

0 25 50 75 100 125 150 175 200 225 250

LINE DRIVER SOURCE/SINK CURRENT (mA)

36692 G41

Line Driver Pulsing On-Time/

Off-Time

2.4

2.2

PULSING OFF-TIME

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

PULSING ON-TIME

0.4

0.2

0 PULSING NOT OCCURRING BELOW 3V

0 5 10 15 20 25 30 35 40

RESIDUAL VOLTAGE, VRQH,L (V) 36692 G43

Line Driver Output Waveforms

VTXD1

5V/DIV

0V

VRXTD1

5V/DIV

0V

VCQ1

5V/DIV

0V

2µs/DIV

VSR > 0.9V, RXD1 PULL-UP RESISTOR = 10k

36692 G44

For more information www.linear.com/LT3669

3669fa

11

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