Maxim MAX1490BEPG, MAX1490AEPG, MAX1490ACPG, MAX1480CEPI, MAX1480CCPI Datasheet

...
0 (0)

19-0259; Rev 2a; 2/98

Complete, Isolated RS-485/RS-422

Data Interface

_________________General Description

The MAX1480A/MAX1480B/MAX1480C/MAX1490A/ MAX1490B are complete, electrically isolated, RS-485/ RS-422 data-communications interface solutions in a hybrid microcircuit. Transceivers, optocouplers, and a transformer provide a complete interface in a standard DIP package. A single +5V supply on the logic side powers both sides of the interface.

The MAX1480B/MAX1480C/MAX1490B feature reduced- slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX1480A/MAX1490A driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480A/B/C are designed for half-duplex communication, while the MAX1490A/B feature full-duplex communication.

Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a highimpedance state. The receiver input has a fail-safe feature that guarantees a known output (RO low for the MAX1480A/B/C, RO high for the MAX1490A/B/C) if the input is open circuit.

The MAX1480A/MAX1480B/MAX1480C/MAX1490A/ MAX1490B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480A/B/C are available in a 28-pin DIP package, and the MAX1490A/B are available in a 24-pin DIP package.

_____________________Selection Table

 

HALF/

DATA

SLEW-

DRIVER

 

ENABLE

PART

FULL

RATE

RATE

TIME

 

DUPLEX

(Mbps)

LIMITED

 

(µs)

 

 

 

 

 

 

 

 

 

MAX1480A

Half

2.5

No

0.2

 

 

 

 

 

MAX1480B

Half

0.25

Yes

35

 

 

 

 

 

MAX1480C

Half

0.25

Yes

0.5

 

 

 

 

 

MAX1490A

Full

2.5

No

MAX1490B

Full

0.25

Yes

________________________Applications

Isolated RS-485/RS-422 Data Interface Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks Automatic Test Equipment

HVAC/Building Control Networks

____________________________Features

Isolated Data Interface, Typically to 1600VRMS (1 minute)

Slew-Rate Limited for Errorless Data Transmission (MAX1480B/MAX1480C/MAX1490B)

High-Speed, Isolated, 2.5Mbps RS-485/RS-422 Interface (MAX1480A/MAX1490A)

Full-Duplex Data Communication (MAX1490A/B)

-7V to +12V Common-Mode Input Voltage Range with Respect to Isolated Ground

Single +5V Supply

Current Limiting and Thermal Shutdown for Driver Overload Protection

Standard 0.6" DIP Package:

28-Pin DIP (MAX1480A/B/C)

24-Pin DIP (MAX1490A/B)

_______________Ordering Information

PART

TEMP. RANGE PIN-PACKAGE

MAX1480ACPI

0°C to +70°C

28 Wide Plastic DIP

 

 

 

MAX1480AEPI

-40°C to +85°C

28 Wide Plastic DIP

 

 

 

Ordering Information continued at end of data sheet.

Data rate for “A” parts is up to 2.5Mbps. Data rate for “B” and “C” parts is up to 250kbps.

__________________Pin Configurations

TOP VIEW

VCC1 1

VCC2 2

D1 3

D2 4

GND1 5

FS 6

SD 7

VCC3 8

DI 9

VCC4 10

RO 11

GND2 12

 

 

 

24

AC1

MAX1490A/B

 

 

 

23

AC2

 

 

 

 

22

ISO VCC1

 

 

 

21

ISO RO DRV

MAX845

MAX488

MAX490

20

A

 

19

B

 

 

 

 

 

 

 

 

18

Z

 

 

 

 

17

Y

 

 

 

 

16

ISO COM1

15 ISO DI DRV

14

ISO VCC2

13

ISO RO LED

ISOLATION BARRIER

DIP

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

MAX1490A/B MAX1480A/B/C,

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.

MAX1480A/B/C, MAX1490A/B

Complete, Isolated RS-485/RS-422

Data Interface

ABSOLUTE MAXIMUM RATINGS

With Respect to GND_

 

Supply Voltage (VCC_)...........................................

-0.3V to +6V

Control Input Voltage (SD, FS)...............

-0.3V to (VCC_ + 0.3V)

Receiver Output Voltage

(RO,

........RO)

-0.3V to (VCC_ + 0.3V)

Output Switch Voltage (D1, D2)........................................

+12V

With Respect to ISO COM_

-0.3V to (ISO VCC_ + 0.3V)

Control Input Voltage (ISO DE_ ) ....

Driver Input Voltage (ISO DI_ ) .......

-0.3V to (ISO VCC_ + 0.3V)

Receiver Output Voltage (ISO RO_) ...

-0.3V to (ISO VCC_ + 0.3V)

Driver Output Voltage (A, B, Y, Z ) ......................

-8V to +12.5V

Receiver Input Voltage (A, B)..............................

-8V to +12.5V

LED Forward Current (DI, DE, ISO RO LED)

......................

50mA

Continuous Power Dissipation (TA = +70°C)

 

 

24-Pin Plastic DIP (derate 8.7mW°C above .....+70°C)

696mW

28-Pin Plastic DIP (derate 9.09mW/°C above ..+70°C)

727mW

Operating Temperature Ranges

 

 

MAX1480_CPI/MAX1490_CPI..............................

0°C to +70°C

MAX1480_EPI/MAX1490_EPI ...........................

- 40°C to +85°C

Storage Temperature Range .............................

- 65°C to +160°C

Lead Temperature (soldering, 10sec) .............................

 

+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VCC_ = 5V ±10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = 5V and TA = +25°C.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

 

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

Switch Frequency

fSWL

VFS = 0V

 

 

535

 

kHz

 

 

 

 

 

 

 

fSWH

 

FS = VCC_ or open

 

 

725

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1480A,

RL = ∞

 

60

90

 

 

 

 

DE´ = VCC_ or open

RL = 54Ω

 

120

 

 

 

 

 

 

 

 

 

 

 

MAX1480B,

RL = ∞

 

35

45

 

 

 

 

DE´ = VCC_ or open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RL = 54Ω

 

95

 

 

 

 

 

 

 

 

35

75

 

Operating Supply Current

ICC

 

MAX1480C,

RL = ∞

 

mA

 

DE´ = VCC_ or open

 

 

 

 

RL = 54Ω

 

95

 

 

 

 

 

 

 

 

 

 

 

 

MAX1490A

RL = ∞

 

100

150

 

 

 

 

 

 

 

 

 

RL = 54Ω

 

170

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1490B

RL = ∞

 

65

125

 

 

 

 

RL = 54Ω

 

130

 

 

 

 

 

 

 

 

 

Shutdown Supply Current

ISHDN

 

SD = VCC_

 

 

0.2

 

µA

(Note 3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shutdown Input Threshold

VSDH

High

 

2.4

 

 

V

VSDL

 

Low

 

 

 

0.8

 

 

 

 

 

 

Shutdown Input Leakage

 

 

 

 

 

10

 

pA

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FS Input Threshold

VFSH

 

High

 

2.4

 

 

V

 

 

 

 

 

 

 

VFSL

 

Low

 

 

 

0.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FS Input Pull-Up Current

 

 

FS low

 

 

 

50

µA

 

 

 

 

 

 

 

 

 

FS Input Leakage Current

 

 

FS high

 

 

10

 

pA

 

 

 

 

 

 

 

 

 

 

DE´, DI´

 

 

 

 

Input High Voltage

VIH

 

 

VCC_ - 0.4

 

V

Input Low Voltage

VIL

 

DE´, DI´

 

 

 

0.4

V

 

 

 

 

 

 

 

 

 

Isolation Resistance

RISO

 

TA = +25°C, VISO = 50VDC

 

100

10,000

 

 

 

 

 

 

 

 

 

 

Isolation Capacitance

CISO

 

TA = +25°C, VISO = 50VDC

 

 

10

 

pF

 

 

 

 

 

 

 

 

 

Differential Driver Output

VOD1

 

 

 

 

 

8

V

(no load)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 _______________________________________________________________________________________

Complete, Isolated RS-485/RS-422

Data Interface

ELECTRICAL CHARACTERISTICS (continued)

(VCC_ = 5V ±10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = 5V and TA = +25°C.) (Notes 1, 2)

PARAMETER

SYMBOL

 

CONDITIONS

 

 

MIN

TYP MAX

UNITS

 

 

 

 

 

 

 

 

 

 

 

Differential Driver Output

VOD2

 

R = 50Ω (RS-422)

 

 

2

 

V

(with load)

 

R = 27Ω (RS-485), Figure 4

 

 

1.5

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Change in Magnitude of

VOD

 

R = 27Ω or 50Ω , Figure 4

 

Differential

 

 

0.3

V

Driver Output Voltage for

 

 

 

 

 

 

 

 

Common Mode

 

 

0.3

Complementary Output States

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Common-Mode Output

VOC

 

R = 27Ω or 50Ω , Figure 4

 

 

 

4

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIN = 12V

 

MAX1490A/B

 

 

0.25

 

 

 

 

 

 

 

 

 

 

 

Input Current (A, B)

ISO IIN

DE´ = 0V,

 

MAX1480A/B/C

 

 

1

mA

 

 

 

 

VCC_ = 0V or 5.5V

VIN = -7V

 

MAX1490A/B

 

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1480A/B/C

 

0.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Input Resistance

RIN

 

-7V ≤ VCM ≤ 12V

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Differential Threshold

VTH

 

-7V ≤ VCM ≤ 12V

 

 

-0.2

0.2

V

 

 

 

 

 

 

 

 

 

 

 

Receiver Input Hysteresis

VTH

 

VCM = 0V

 

 

 

70

mV

 

 

 

 

 

 

 

 

 

 

 

Receiver Output/Receiver

VOL

 

Using resistor values listed in Tables 1 and 2

 

0.4

V

Output Low Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Output/Receiver

IOH

 

VOUT = 5.5V

 

 

 

250

µA

Output High Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Short-Circuit Current

ISO IOSD

 

-7V ≤ VO ≤ 12V (Note 4)

 

 

 

100

mA

 

 

 

 

 

 

 

 

 

 

 

SWITCHING CHARACTERISTICS—MAX1480A/MAX1490A

(VCC_ = 5V ±10%, FS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = 5V and TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

Driver Input to Output

tPLH

Figures 5 and 7, RDIFF = 54Ω ,

 

100

275

ns

Propagation Delay

tPHL

CL1 = CL2 = 100pF

 

100

275

 

 

 

 

 

 

 

 

 

 

 

Driver Output Skew

tSKEW

Figures 5 and 7, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

25

90

ns

 

 

 

 

 

 

 

 

 

Driver Rise or Fall Time

tR, tF

Figures 5 and 7, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

15

40

ns

 

 

 

 

 

 

 

 

 

Driver Enable to Output High

tZH

Figures 6 and 8, CL = 100pF, S2 closed

 

0.2

1.5

µs

(MAX1480A only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Enable to Output Low

tZL

Figures 6 and 8, CL = 100pF, S1 closed

 

0.2

1.5

µs

 

(MAX1480A only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Disable Time from Low

tLZ

Figures 6 and 8, CL = 15pF, S1 closed

 

0.2

1.5

µs

 

(MAX1480A only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Disable Time from High

tHZ

Figures 6 and 8, CL = 15pF, S2 closed

 

0.2

1.5

µs

 

(MAX1480A only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Input to Output

tPLH

Figures 5 and 10, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

100

225

ns

 

Propagation Delay

tPHL

 

100

225

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ItPLH - tPHLI Differential

tSKD

Figures 5 and 10, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

20

 

ns

 

Receiver Skew

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1490A/B MAX1480A/B/C,

_______________________________________________________________________________________ 3

MAX1480A/B/C, MAX1490A/B

Complete, Isolated RS-485/RS-422

Data Interface

SWITCHING CHARACTERISTICS—MAX1480B/MAX1480C/MAX1490B

(VCC_ = 5V ±10%, FS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = 5V and TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

Maximum Data Rate

fMAX

tPLH, tPHL < 50% of data period

2.5

 

 

Mbps

 

 

 

 

 

 

 

Time to Shutdown

tSHDN

 

 

100

 

µs

 

 

 

 

 

 

 

Shutdown to Driver Output High

tZH(SHDN)

Figures 6 and 9, CL = 100pF, S2 closed

 

3

10

µs

 

 

 

 

 

 

 

Shutdown to Driver Output Low

tZL(SHDN)

Figures 6 and 9, CL = 100pF, S1 closed

 

3

10

µs

 

 

 

 

 

 

 

 

Driver Input to Output

tPLH

Figures 5 and 7, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

1.0

2.0

µs

Propagation Delay

tPHL

Figures 5 and 7, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

1.0

2.0

 

 

 

Driver Output Skew

tSKEW

Figures 5 and 7, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

100

800

ns

 

 

 

 

 

 

 

Driver Rise or Fall Time

tR, tF

Figures 5 and 7, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

1.0

2.0

µs

 

 

 

 

 

 

 

 

 

Driver Enable to Output High

tZH

Figures 6 and 8, CL = 100pF, S2 closed

 

35

100

µs

 

(MAX1480B only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Enable to Output Low

tZL

Figures 6 and 8, CL = 100pF, S1 closed

 

35

100

µs

(MAX1480B only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Disable Time from Low

tLZ

Figures 6 and 8, CL = 15pF, S1 closed

 

13

50

µs

 

(MAX1480B only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Disable Time from High

tHZ

Figures 6 and 8, CL = 15pF, S2 closed

 

13

50

µs

(MAX1480B only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Enable to Output High

tZH

Figures 6 and 8, CL = 100pF, S2 closed

 

0.5

4.5

µs

 

(MAX1480C only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Enable to Output Low

tZL

Figures 6 and 8, CL = 100pF, S1 closed

 

0.5

4.5

µs

 

(MAX1480C only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Disable Time from Low

tLZ

Figures 6 and 8, CL = 15pF, S1 closed

 

2.0

4.5

µs

 

(MAX1480C only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Disable Time from High

tHZ

Figures 6 and 8, CL = 15pF, S2 closed

 

2.0

4.5

µs

 

(MAX1480C only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Input to Output

tPLH

Figures 5 and 10, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

0.8

2.0

µs

 

Propagation Delay

tPHL

 

0.8

2.0

 

 

 

 

 

 

ItPLH - tPHLI Differential

tSKD

Figures 5 and 10, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

200

 

ns

 

Receiver Skew

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum Data Rate

fMAX

tPLH, tPHL < 50% of data period

0.25

 

 

Mbps

 

 

 

 

 

 

 

Time to Shutdown

tSHDN

 

 

100

 

µs

 

 

 

 

 

 

 

 

 

Shutdown to Driver Output High

tZH(SHDN)

Figures 6 and 9, CL = 100pF, S2 closed

 

35

100

µs

 

 

 

 

 

 

 

Shutdown to Driver Output Low

tZL(SHDN)

Figures 6 and 9, CL = 100pF, S1 closed

 

35

100

µs

 

 

 

 

 

 

 

 

 

Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to logicside ground (GND_), unless otherwise specified.

Note 2: For DE´ and DI´ pin descriptions, see Detailed Block Diagram and Typical Application Circuit (Figure 1 for MAX1480A/ MAX1480B/MAX1480C, Figure 2 for MAX1490A/MAX1490B).

Note 3: Shutdown supply current is the current at VCC1 and VCC2 when shutdown is enabled.

Note 4: Applies to peak current (see Typical Operating Characteristics). Although the MAX1480A/B/C and MAX1490A/B provide electrical isolation between logic ground and signal paths, they do not provide isolation between external shields and the signal paths (see Isolated Common Connection section).

4 _______________________________________________________________________________________

Maxim MAX1490BEPG, MAX1490AEPG, MAX1490ACPG, MAX1480CEPI, MAX1480CCPI Datasheet

Complete, Isolated RS-485/RS-422

Data Interface

__________________________________________Typical Operating Characteristics

(VCC_ = 5V, FS = VCC_, TA = +25°C, unless otherwise noted.)

 

 

OUTPUT CURRENT vs.

 

 

 

OUTPUT CURRENT vs.

 

 

 

RECEIVER OUTPUT HIGH VOLTAGE

 

 

RECEIVER OUTPUT LOW VOLTAGE

 

 

 

RECEIVER OUTPUT HIGH VOLTAGE

 

 

 

 

vs. TEMPERATURE

 

 

 

80

MEASURED AT ISO RO DRV

MAX1480/90A/B-01

 

-30

MEASURED AT ISO RO DRV

MAX1480/90A/B-02

 

5.00

MEASURED AT ISO RO DRV

 

 

MAX1480/90A/B-03

(mA)CURRENTOUTPUT

 

(mA)CURRENTOUTPUT

 

(V)VOLTAGEHIGHOUTPUT

 

 

 

70

 

-25

 

4.75

IRO = 8mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

4.50

 

 

 

 

 

 

 

50

 

 

 

-20

 

 

 

4.25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

-15

 

 

 

4.00

 

 

 

 

 

 

 

30

 

 

 

-10

 

 

 

3.75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

3.50

 

 

 

 

 

 

 

10

 

 

 

-5

 

 

 

3.25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

0

 

 

 

3.00

 

 

 

 

 

 

 

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

 

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

 

-40

-20

0

20

40

60

80

 

 

OUTPUT LOW VOLTAGE (V)

 

 

 

OUTPUT HIGH VOLTAGE (V)

 

 

 

 

TEMPERATURE (°C)

 

 

RECEIVER OUTPUT LOW VOLTAGE

OUTPUT CURRENT vs.

OUTPUT CURRENT vs.

vs. TEMPERATURE

DRIVER OUTPUT LOW VOLTAGE

DRIVER OUTPUT HIGH VOLTAGE

 

0.8

MEASURED AT ISO RO DRV

 

 

MAX1480/90A/B-04

 

180

MAX1480/90A/B-05

 

-100

MAX1480/90A/B-06

(V)VOLTAGELOWOUTPUT

 

 

 

(mA)CURRENTOUTPUT

 

(mA)CURRENTOUTPUT

 

0.7

IRO = 8mA

 

 

 

 

160

-90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.6

 

 

 

 

 

 

 

140

 

 

-80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-70

 

 

 

 

 

 

 

 

 

 

120

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

-60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

0.4

 

 

 

 

 

 

 

 

 

-50

 

 

 

 

 

 

 

 

 

80

 

 

 

 

0.3

 

 

 

 

 

 

 

 

 

-40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-30

 

 

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

20

 

 

-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

0

 

 

0

 

 

-40

-20

0

20

40

60

80

 

 

0 1 2 3 4 5 6 7 8 9 10 11 12

 

 

-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6

 

 

 

TEMPERATURE (°C)

 

 

 

 

OUTPUT LOW VOLTAGE (V)

 

 

OUTPUT HIGH VOLTAGE (V)

DRIVER OUTPUT CURRENT

DRIVER DIFFERENTIAL OUTPUT VOLTAGE

MAX1480B/MAX1480C/MAX1490B

vs. DIFFERENTIAL OUTPUT VOLTAGE

vs. TEMPERATURE

SHUTDOWN CURRENT vs. TEMPERATURE

 

80

DI´ = HIGH OR OPEN

MAX1480/90A/B-07

 

3.0

DI´ = HIGH OR OPEN

 

 

MAX1480/90A/B-08

 

0.40

SD = VCC_, DI´ = VCC_

 

 

MAX1480/90A/B-09

(mA)CURRENTOUTPUT

 

(V)VOLTAGEOUTPUTDIFFERENTIAL

2.9

 

 

A)(CURRENTSHUTDOWNμ

 

 

 

70

 

RL = 54Ω

 

 

 

 

0.35

DE´ (MAX1480B/C ONLY) = VCC_

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.8

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

0.30

MEASURED AT VCC1 AND VCC2

 

 

 

 

 

 

2.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

 

 

 

2.6

 

 

 

 

 

 

 

0.25

 

 

 

 

 

 

 

40

 

 

 

2.5

 

 

 

 

 

 

 

0.20

 

 

 

 

 

 

 

30

 

 

 

2.4

 

 

 

 

 

 

 

0.15

 

 

 

 

 

 

 

 

 

 

2.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

0.10

 

 

 

 

 

 

 

 

 

 

2.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

2.1

 

 

 

 

 

 

 

0.05

 

 

 

 

 

 

 

0

 

 

 

2.0

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

 

-40

-20

0

20

40

60

80

 

-40

-20

0

20

40

60

80

 

 

DIFFERENTIAL OUTPUT VOLTAGE (V)

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

TEMPERATURE (°C)

 

 

MAX1490A/B MAX1480A/B/C,

_______________________________________________________________________________________ 5

MAX1480A/B/C, MAX1490A/B

Complete, Isolated RS-485/RS-422

Data Interface

_____________________________Typical Operating Characteristics (continued)

(VCC_ = 5V, FS = VCC_, TA = +25°C, unless otherwise noted.)

 

 

 

 

 

 

 

 

MAX1480A

 

 

 

 

 

 

 

 

 

 

 

MAX1480B

 

 

 

 

 

 

 

 

 

 

 

MAX1480C

 

 

 

 

 

 

 

SUPPLY CURRENT vs. TEMPERATURE

 

 

 

 

SUPPLY CURRENT vs. TEMPERATURE

 

 

120

SUPPLY CURRENT vs. TEMPERATURE

 

 

160

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

140

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1480/90A/B-11

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1480/90A/B-12

 

 

 

 

 

 

 

 

 

 

 

RL =

54Ω

MAX1480/90A/B-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

CC =

5.5V

 

RL

= 54

Ω

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(mA)

 

 

 

 

 

 

V

CC = 4.5V

 

 

 

(mA)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(mA)

 

 

 

 

V

CC = 4.5V

 

 

 

 

 

 

140

 

 

 

 

 

V

CC = 5.5V

 

 

 

 

 

120

 

 

 

 

 

VCC

= 5.5V

 

 

RL

= 54Ω

 

 

 

 

 

 

 

V

CC = 5.0V

 

 

 

 

 

 

 

120

 

 

 

 

 

V

CC = 5.0V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

= 5.0V

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

CURRENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CURRENT

100

 

 

 

 

 

 

 

 

 

 

 

CURRENT

90

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

= 4.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DE

´ =

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RL =

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

DE

´ =

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

 

SUPPLY

80

 

 

 

 

 

 

 

 

 

 

 

 

SUPPLY

 

DE´ =

VCC

 

 

 

 

 

 

 

 

 

 

SUPPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

CC = 5.5V

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

 

RL

=

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

= 5.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC = 5.0V

 

 

RL =

 

 

 

 

 

 

 

VCC =

5.0V

 

 

 

 

 

 

 

 

VCC

= 5.5V

VCC = 4.5V

VCC

= 5.0V

 

 

40

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC =

4.5V

 

 

 

 

 

 

 

 

 

 

 

 

VCC

=

4.5V

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-40

-20

 

0

20

 

40

 

60 80

 

 

 

-40 -20

0

20 40

 

60 80

 

 

-40

-20

0

20 40

60 80

 

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

 

 

 

 

MAX1490A

 

 

 

 

 

 

 

 

 

 

 

MAX1490B

 

 

 

 

 

 

 

SUPPLY CURRENT vs. TEMPERATURE

 

 

 

SUPPLY CURRENT vs. TEMPERATURE

 

200

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX1480/90A/B-13

 

150

 

 

 

 

 

 

 

 

 

 

 

 

MAX1480/90A/B-14

 

 

 

 

 

VCC =

5.5V

 

 

 

 

RL =

54

Ω

 

 

 

 

 

V

CC = 5.5V

 

 

 

 

 

 

(mA)

 

 

 

 

 

 

 

 

 

(mA)

140

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

180

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

CC = 5.0V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

130

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC =

5.0V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

CC = 4.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120

 

 

 

 

 

 

 

 

 

 

 

 

160

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RL =

54

Ω

 

CURRENT

 

 

 

 

VCC =

4.5V

 

 

 

 

 

 

 

 

CURRENT

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUPPLY

140

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUPPLY

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

 

 

VCC = 5.5V

 

 

RL

 

 

 

120

 

 

=

5.0V

 

 

 

 

 

 

 

 

 

80

 

 

= 5.0V

 

 

=

 

 

 

 

 

 

 

 

VCC

=

5.5V

 

 

RL

=

 

 

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

CC =

4.5V

 

 

 

 

 

 

 

 

 

 

 

VCC =

4.5V

 

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-40

-20

0

20

40

 

60 80

 

 

-40

-20

0

20 40

 

60 80

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

DRIVER DISABLE TIME (μs)

DRIVER DISABLE TIME vs. TEMPERATURE

100

MAX1480B

10

MAX1480C

1RL = 54Ω

VDI´ = 0V MEASURED FROM DE´ TO VALID OUTPUT

MAX1480A

0.1

-40

-20

0

20

40

60

80

TEMPERATURE (°C)

MAX1480/90A/B-15a

DRIVER ENABLE TIME (μs)

DRIVER ENABLE TIME vs. TEMPERATURE

100

MAX1480B

10

RL = 54Ω

VDI´ = 0V MEASURED FROM

DE´ TO VALID OUTPUT

1

MAX1480C

MAX1480A

0.1

-40

-20

0

20

40

60

80

TEMPERATURE (°C)

MAX1480/90A/B-15b

6 _______________________________________________________________________________________

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