ADM2481 Datasheet, PDF (4/20 Pages) Analog Devices – Half-Duplex, iCoupler Isolated RS-485 Transceiver

ADM2481
TIMING SPECIFICATIONS
3.0 V ≤ VDD1 ≤ 5.5 V, 4.75 V ≤ VDD2 ≤ 5.25 V, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
DRIVER
Maximum Data Rate
Propagation Delay
Skew
Rise/Fall Time
Enable Time
Disable Time
RECEIVER
Propagation Delay
Differential Skew
Enable Time
Disable Time
Symbol
tPLH, tPHL
tSKEW
tR, tF
tPLH, tPHL
tSKEW
Min Typ Max Unit
500
kbps
250
620 ns
40 ns
200
600 ns
1050 ns
1050 ns
400
25
40
1050 ns
250 ns
70 ns
70 ns
Test Conditions/Comments
RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 18 and Figure 22
RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 18 and Figure 22
RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 18 and Figure 22
RL = 500 Ω, CL = 100 pF, see Figure 19 and Figure 24
RL = 500 Ω, CL = 15 pF, see Figure 19 and Figure 24
CL = 15 pF, see Figure 20 and Figure 23
CL = 15 pF, see Figure 20 and Figure 23
RL = 1 kΩ, CL = 15 pF, see Figure 21 and Figure 25
RL = 1 kΩ, CL = 15 pF, see Figure 21 and Figure 25
PACKAGE CHARACTERISTICS
Table 3.
Parameter
Resistance (Input-Output)¹
Capacitance (Input-Output)¹
Input Capacitance²
Symbol
RI-O
CI-O
CI
Min Typ
10¹²
3
4
Max Unit
Ω
pF
pF
Test Conditions
f = 1 MHz
1 _{Device is considered a 2-terminal device: Pin 1 to Pin 8 are shorted together, and Pin 9 to Pin16 are shorted together.}
2 _{Input capacitance is from any input data pin to ground.}
REGULATORY INFORMATION (PENDING)
Table 4. ADM2481 Approvals
Organization Approval Type
UL
Recognized under the Component Recognition
Program of Underwriters Laboratories, Inc.
VDE
Certified according to DIN V VDE V 0884-10
(VDE V 0884-10): 2006-12
Notes
In accordance with UL 1577, each ADM2481 is proof tested by
applying an insulation test voltage of ≥ 3000 V rms for 1 second
(current leakage detection limit = 5 μA).
In accordance with DIN V VDE V 0884-10, each ADM2481 is proof
tested by applying an insulation test voltage of ≥ 1050 V peak for
1 second (partial discharge detection limit = 5 pC).
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 5.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
2500
7.7
Minimum External Tracking (Creepage)
L(I02)
7.6
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
CTI
Isolation Group
0.017 min
>175
IIIa
Unit
V rms
mm
mm
mm
V
Conditions
1-minute duration
Measured from input terminals to output
terminals, shortest distance through air
Measured from input terminals to output
terminals, shortest distance along body
Insulation distance through insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (Table 1 in DIN VDE 0110,1/89)
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