ADM2481 Datasheet, PDF (3/20 Pages) Analog Devices – Half-Duplex, iCoupler Isolated RS-485 Transceiver

ADM2481
SPECIFICATIONS
3.0 V ≤ VDD1 ≤ 5.5 V, 4.75 V ≤ VDD2 ≤ 5.25 V, TA = TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter
DRIVER
Differential Outputs
Differential Output Voltage
Δ |VOD| for Complementary Output States
Common-Mode Output Voltage
Δ |VOC| for Complementary Output States
Output Short-Circuit Current,
VOUT = High
VOUT = Low
Logic Inputs
Input High Voltage
Input Low Voltage
CMOS Logic Input Current (TxD, DE, RE)
RECEIVER
Differential Inputs
Differential Input Threshold Voltage
Input Hysteresis
Input Resistance (A, B)
Input Current (A, B)
RxD Logic Output
Output High Voltage
Output Low Voltage
Output Short-Circuit Current
Three-State Output Leakage Current
POWER SUPPLY CURRENT
Logic Side
Bus Side
COMMON-MODE TRANSIENT IMMUNITY¹
Symbol Min
Typ
Max
Unit Test Conditions/Comments
VOD
2.0
VOD
1.5
VOD3
1.5
VOC
ISC
−250
−250
5
5
5
5
0.2
3
0.2
+250
+250
V
RL = ∞, see Figure 16
V
RL = 50 Ω (RS-422), see Figure 16
V
RL = 27 Ω (RS-485), see Figure 16
V
VTEST = −7 V to +12 V, VDD1 ≥ 4.75,
see Figure 17
V
RL = 27 Ω or 50 Ω, see Figure 16
V
RL = 27 Ω or 50 Ω, see Figure 16
V
RL = 27 Ω or 50 Ω, see Figure 16
mA
−7 V ≤ VOUT ≤ +12 V
mA
−7 V ≤ VOUT ≤ +12 V
VIH
0.7 VDD1
V
TxD, DE, RE
VIL
0.25 VDD1 V
TxD, DE, RE
II
−10
+0.01 +10
μA
TxD, DE, RE = VDD1 or 0 V
VTH
−200
−125 −30
mV
−7 V ≤ VCM ≤ +12 V
VHYS
20
mV
−7 V ≤ VCM ≤ +12 V
96
150
kΩ
−7 V ≤ VCM ≤ +12 V
0.125
mA
VIN = 12 V
−0.1
mA
VIN = −7 V
VOH
VDD1 − 0.1
V
IOUT = 20 μA, VA − VB = 0.2 V
VDD1 − 0.4 VDD1 − 0.2
V
IOUT = 4 mA, VA − VB = 0.2 V
VOL
0.1
V
IOUT = −20 μA, VA − VB = −0.2 V
0.4
V
IOUT = −4 mA, VA − VB = −0.2 V
ISC
7
85
mA
VOUT = GND or VCC
±1
μA
0.4 V ≤ VOUT ≤ 2.4 V
IDD1
IDD2
VCM
25
2.5
mA
4.5 V ≤ VDD1 ≤ 5.5 V, outputs
unloaded, RE = 0 V
1.3
mA
3.0 V ≤ VDD1 ≤ 3.6 V, outputs
unloaded, RE = 0 V
2.0
mA Outputs unloaded, DE = 5 V
1.7
mA Outputs unloaded, DE = 0 V
kV/μs TxD = VDD1 or 0 V, VCM = 1 kV,
transient magnitude = 800 V
1 _{Common-mode transient immunity is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation.}
VCM 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.
Rev. 0 | Page 3 of 20