= −40°C to +125°C. All min/max specifications apply over the entire recommended operation
range, unless otherwise noted. All typical specifications at T
A
= 25°C, V
DD1
= V
DD2
= 5.0 V, unless otherwise noted.
Table 1.
Parameter
SUPPLY CURRENT
Power Supply Current
Logic Side
TxD/RxD Data Rate = 2.5 Mbps
Bus Side
TxD/RxD Data Rate = 2.5 Mbps
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
I
DD1
I
DD2
10
10
12
90
130
94
46
mA
mA
mA
mA
mA
mA
mA
Supply Current in Shutdown Mode
DRIVER
Differential Outputs
Differential Output Voltage
I
SHDN
10
mA
Unloaded output, DE = V
DD1
, RE = 0 V
Unloaded output, DE = V
DD1
, RE = 0 V
Unloaded output, DE = V
DD1
, RE = 0 V
Unloaded output, DE = V
DD1
, RE = 0 V
DE = V
DD1
, RE = 0 V, V
DD2
= 5.5 V,
R = 27 Ω, see Figure 27
DE = V
DD1
, RE = 0 V, V
DD2
= 5.5 V,
R = 27 Ω, see Figure 27
DE = V
DD1
, RE = 0 V, V
DD2
= 3.0 V,
R = 27 Ω, see Figure 27
DE = 0 V, RE = V
DD1
|V
OD
|
1.5
2.1
5.0
5.0
5.0
5.0
0.2
3.0
0.2
V
V
V
V
V
V
V
|V
OD3
|
1.5
2.1
Change in Differential Output Voltage
for Complementary Output States
Common-Mode Output Voltage
Change in Common-Mode Output
Voltage for Complementary Output
States
Short-Circuit Output Current
V
OUT
= Low
V
OUT
= High
Logic Inputs (DE, RE, TxD)
Input Threshold Low
Input Threshold High
Input Current
RECEIVER
Differential Inputs
Differential Input Threshold Voltage
Input Voltage Hysteresis
Input Current (A, B)
Input Capacitance (A, B)
Line Input Resistance
∆|V
OD
|
V
OC
∆|
VOC
|
V
DD2
≥ 3.0 V, R = 27 Ω or 50 Ω,
see Figure 27
V
DD2
≥ 4.5 V, R = 27 Ω or 50 Ω,
see Figure 27
V
DD2
≥ 3.0 V, V
CM
= −25 V to +25 V, see
Figure 28
V
DD2
≥ 4.5 V, V
CM
= −25 V to +25 V, see
Figure 28
R = 27 Ω or 50 Ω, see Figure 27
R = 27 Ω or 50 Ω, see Figure 27
R = 27 Ω or 50 Ω, see Figure 27
I
OSL
I
OSH
V
IL
V
IH
I
TxD
−250
−250
+250
+250
0.33 × V
DD1
mA
mA
V
V
μA
−42 V ≤ V
SC
≤ +42 V
1
−42 V ≤ V
SC
≤ +42 V
1
1.7 V ≤ V
DD1
≤ 5.5 V
1.7 V ≤ V
DD1
≤ 5.5 V
0 V ≤ V
IN
≤ V
DD1
0.7 V
DD1
+1
V
TH
V
HYS
I
I
C
AB
R
IN
−200
−1.0
−1.0
−125
30
−30
+1.0
+1.0
150
96
mV
mV
mA
mA
pF
kΩ
−25 V ≤ V
CM
≤ +25 V
−25 V ≤ V
CM
≤ +25 V
DE = 0 V, V
DD2
= 0 V/5 V, V
IN
= ±25 V
DE = 0 V, V
DD2
= 0 V/5 V, V
IN
= ±42 V
T
A
= 25°C, see Figure 17
−25 V ≤ V
CM
≤ +25 V, up to 256 nodes
supported
Rev. A | Page 3 of 27
ADM2795E
Parameter
Logic Outputs
Output Voltage Low
Output Voltage High
Short-Circuit Current
Three-State Output Leakage Current
COMMON-MODE TRANSIENT IMMUNITY
2
1
2
Data Sheet
Symbol
V
OLRxD
V
OHRxD
I
OZR
75
125
Min
Typ
Max
0.2
V
DD1
− 0.2
100
±2
Unit
V
V
mA
μA
kV/μs
Test Conditions/Comments
I
ORxD
= 3.0 mA, V
A
− V
B
= −0.2 V
I
ORxD
= −3.0 mA, V
A
− V
B
= 0.2 V
V
OUT
= GND or V
DD1
, RE = 0 V
RE = V
DD1
, RxD = 0 V or V
DD1
V
CM
≥1 kV, transient magnitude ≥800 V
V
SC
is the short-circuit voltage at the RS-485 A or B bus pin.
Common-mode transient immunity is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. V
CM
is the common-mode potential difference between the logic and bus sides. The transient magnitude is the range over which the common mode is slewed. The
common-mode voltage slew rates apply to both rising and falling common-mode voltage edges.
TIMING SPECIFICATIONS
V
DD1
= 1.7 V to 5.5 V, V
DD2
= 3.0 V to 5.5 V, T
A
= T
MIN
to T
MAX
(−40°C to +125°C), unless otherwise noted.
Table 2.
Parameter
DRIVER
1
Maximum Data Rate
Propagation Delay, t
DPLH
, t
DPHL
Differential Skew, t
SKEW
Rise/Fall Times, t
R
, t
F
Enable Time, t
ZH
, t
ZL
Disable Time, t
HZ
, t
LZ
RECEIVER
2
Propagation Delay, t
PLH
, t
PHL
Skew, t
SKEW
Enable Time
Disable Time
RxD Pulse Width Distortion
1
2
Min
2.5
Typ
Max
Unit
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Conditions/Comments
30
10
40
500
500
120
140
4
10
10
500
50
130
2500
2500
200
220
40
50
50
40
R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 29 and Figure 33
R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 29 and Figure 33
R
LDIFF
= 54 Ω, C
L1
= C
L2
= 100 pF, see Figure 29 and Figure 33
R
L
= 110 Ω, C
L
= 50 pF, see Figure 30 and Figure 35
R
L
= 110 Ω, C
L
= 50 pF, see Figure 30 and Figure 35
C
L
= 15 pF, see Figure 31 and Figure 34, 10, V
ID
≥ ±1.5 V
C
L
= 15 pF, see Figure 31 and Figure 34, V
ID
≥ ±600 mV
C
L
= 15 pF, see Figure 31 and Figure 34, V
ID
≥ ±1.5 V
R
L
= 1 kΩ, C
L
= 15 pF, see Figure 32 and Figure 36
R
L
= 1 kΩ, C
L
= 15 pF, see Figure 32 and Figure 36
C
L
= 15 pF, see Figure 31 and Figure 34, V
ID
≥ ±1.5 V
See Figure 29 for the definition of R
LDIFF
.
Receiver propagation delay, skew, and pulse width distortion specifications are tested with a receiver differential input voltage (V
ID
) of ≥±600 mV or ≥±1.5 V, as noted.
Rev. A | Page 4 of 27
Data Sheet
INSULATION AND SAFETY-RELATED SPECIFICATIONS
For additional information, see
www.analog.com/icouplersafety.
Table 3.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Minimum External Tracking (Creepage)
Minimum Clearance in the Plane of the Printed
Circuit Board (PCB Clearance)
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Material Group
Symbol
L(I01)
L(I02)
L(PCB)
Value
5000
7.8
7.8
8.3
Unit
V rms
mm min
mm min
mm min
ADM2795E
CTI
25.5
>400
II
μm min
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
Measured from input terminals to output terminals,
shortest distance through air, line of sight, in the PCB
mounting plane
Minimum distance through insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89)
PACKAGE CHARACTERISTICS
Table 4.
Parameter
Resistance (Input to Output)
1
Capacitance (Input to Output)
1
Input Capacitance
2
Input Capacitance, A and B Pins
IC Junction to Ambient Thermal Resistance
1
2
Symbol
R
I-O
C
I-O
C
I
C
AB
θ
JA
Min
Typ
10
13
2.2
4.0
150
59.7
Max
Unit
Ω
pF
pF
pF
°C/W
Test Conditions/Comments
f = 1 MHz
T
A
= 25°C, see Figure 17
Thermocouple located at center of package underside
The device is considered a 2-terminal device: Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together.
Input capacitance is from any digital input pin to ground.
REGULATORY INFORMATION
See Table 8 and the Insulation Wear Out section for details regarding recommended maximum working voltages for specific cross
isolation waveforms and insulation levels. The
ADM2795E
is approved or pending approval by the organizations listed in Table 5.
Table 5.
ADM2795E
Approvals
UL
Recognized Under UL 1577
Component Recognition
Program
1
Single Protection, 5000 V rms
Isolation Voltage
CSA
Approved under CSA Component
Acceptance Notice 5A
CSA 60950-1-07+A1+A2 and IEC 60950-1
second edition +A1+A2:
Basic insulation at 780 V rms
(1103 V peak)
Reinforced insulation at 390 V rms
(552 V peak)
IEC 60601-1 Edition 3.1: 1 means of
patient protection (MOPP), 400 V rms
(566 V peak)
2 MOPP, 237 V rms (335 V peak)
CSA 61010-1-12+A1 and IEC 61010-1 third
edition:
Basic insulation at 600 V rms mains
(Overvoltage Category III), 780 V
secondary (1103 V peak)
File 205078
VDE
Certified according to DIN V VDE V 0884-
10 (VDE V 0884-10):2006-12
2
Reinforced insulation, V
IORM
= 849 V peak,
V
IOSM
= 8000 V peak
CQC (Pending)
Certified by
CQC11-471543-2012,
GB4943.1-2011
Basic insulation at
780 V rms (1103 V peak)
Reinforced insulation at
389 V rms (552 V peak)
File E214100
1
2
File 2471900-4880-0001/231230
File (pending)
In accordance with UL 1577, each
ADM2795E
is proof tested by applying an insulation test voltage ≥ 6000 V rms for 1 sec.
In accordance with DIN V VDE V 0884-10, each
ADM2795E
is proof tested by applying an insulation test voltage ≥1592 V peak for 1 sec.
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