ADM485EARZ-REEL7(Rev0) 查看數據表（PDF） - Analog Devices

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ADM485EARZ-REEL7
(Rev.:Rev0)

5 V, ±15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers

Analog Devices 

ADM485E/ADM487E/ADM1487E

SPECIFICATIONS

VCC = 5 V ± 5%, TA = TMIN to TMAX, unless otherwise noted.

Table 2. ADM485E/ADM487E/ADM1487E

Parameter

Symbol Min Typ Max

DRIVER

Differential Outputs

Differential Output Voltage (no Load) VOD1

5

Differential Output Voltage (with Load) VOD2

2

1.5

5

Δ |VOD| for Complementary Output

0.2

States

Common-Mode Output Voltage

VOC

3

Δ |VOC| for Complementary Output

0.2

States

Logic Inputs

Input High Voltage

VIH

2.0

Input Low Voltage

VIL

0.8

Logic Input Current

IIN1

±2

RECEIVER

Input Current (A, B)

IIN2

1.0

−0.8

0.25

−0.2

Differential Inputs

Differential Input Threshold Voltage

VTH

Input Hysteresis

ΔVTH

Receiver Output Logic

Output Voltage High

VOH

Output Voltage Low

VOL

Three-State Output Leakage Current

IOZR

Receiver Input Resistance

RIN

POWER SUPPLY

No Load Supply Current

ICC

Supply Current in Shutdown

ISHDN

Driver Short-Circuit Current, VO High

IOSD1

Driver Short-Circuit Current, VO Low

IOSD2

Receiver Short-Circuit Current

IOSR

ESD PROTECTION

A, B Pins

−0.2

+0.2

70

3.5

0.4

±1

12

48

500 900

300 500

300 500

230 400

250 400

120 250

0.5 10

35

250

35

250

7

95

±15

Unit Test Conditions/Comments

V

V

RL = 50 Ω (RS-422)

V

RL = 27 Ω (RS-485) (see Figure 18)

V

RL = 27 Ω or 50 Ω (see Figure 18)

V

RL = 27 Ω or 50 Ω (see Figure 18)

V

RL = 27 Ω or 50 Ω (see Figure 18)

V

DE, DI, RE

V

DE, DI, RE

μA DE, DI, RE

mA DE = 0 V, VIN = 12 V

mA VCC = 0 V or +5.25 V, VIN = −7 V (ADM485E)

mA DE = 0 V, VIN = 12 V

mA VCC = 0 V or +5.25 V, VIN = −7 V

(ADM487E/ADM1487E)

V

−7 V < VCM < +12 V

mV

VCM = 0 V

V

IOUT = −4 mA, VID = +200 mV

V

IOUT = +4 mA, VID = −200 mV

μA

0.4 V < VO < 2.4 V

kΩ

−7 V < VCM < +12 V (ADM485E)

kΩ

−7 V< VCM < +12 V (ADM487E/ADM1487E)

μA

RE = 0 V or VCC, DE = VCC (ADM485E)

μA

RE = 0 V or VCC, DE = 0 V (ADM485E)

μA

RE = 0 V or VCC, DE = VCC (ADM1487E)

μA

RE = 0 V or VCC, DE = 0 V (ADM1487E)

μA

RE = 0 V or VCC, DE = VCC (ADM487E)

μA RE = 0 V, DE = 0 V (ADM487E)

μA

DE = 0 V, RE = VCC (ADM487E)

mA −7 V ≤ VO ≤ +12 V, applies to peak current

−7 V ≤ VO ≤ +12 V, applies to peak current

mA 0 V ≤ VO ≤ VCC

kV

Human body model

Rev. 0 | Page 3 of 16

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