il3122 NVE Corp., il3122 Datasheet - Page 6

• Manufacturer Part Number: il3122
• Description: Low Cost Rs-485 And Rs-422 Isolated Transceivers
• Manufacturer: NVE Corp.

Receiver Section
Electrical specifications are T
Notes (apply to both driver and receiver sections):
Parameters
Coil Input Impedance
Temperature Coefficient
of Coil Resistance
Positive-going Input Threshold
Negative-going Input Threshold
Hysteresis Voltage (V
High Level Digital Output Voltage
Low Level Digital Output Voltage
High impedance state output current
Line Input Current
Input Resistance
Parameters
Data Rate
Propagation Delay
Pulse Skew
Skew Limit
Output Enable Time to High Level
Output Enable Time to Low Level
Output Disable Time from High Level
Output Disable Time from Low Level
Parameters
Data Rate
Propagation Delay
Pulse Skew
Skew Limit
Output Enable Time to High Level
Output Enable Time to Low Level
Output Disable Time from High Level
Output Disable Time from Low Level
1. All voltages are with respect to network ground except differential I/O bus voltages.
2. Differential input/output voltage is measured at the non-inverting terminal A with respect to the inverting terminal B.
3. Skew limit is the maximum difference in any two channels in one device.
4. The power-off measurement in ANSI Standard EIA/TIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs.
5. All typical values are at V
6. While −7 V < V
7. Δ|VOD| and Δ|VOC| are the changes in magnitude of V
8. This applies for both power on and power off; refer to ANSI standard RS-485 for exact condition. The EIA/TIA-422-B limit does not apply for a combined
9. Includes 10 ns read enable time. Maximum propagation delay is 25 ns after read assertion.
10. Pulse skew is defined as the |t
NVE Corporation
driver and receiver terminal.
(10)
(10)
(3)
(3)
11409 Valley View Road, Eden Prairie, MN 55344-3617
(8)
(9)
(9)
CM
< 12 V, the minimum V
it+
− V
DD1
min
it−
)
, V
PLH
to T
DD2
− t
max
= 5 V or V
PHL
unless otherwise stated.
| of each channel.
Switching Characteristics (V
OD2
Switching Characteristics (V
TC R
t
t
DD1
Symbol
Symbol
Symbol
with a 54 Ω load is either ½ V
SK
SK
t
t
Z
V
SK
SK
V
V
V
V
t
t
t
t
(LIM)
t
t
(LIM)
t
t
= 3.3 V and T
I
t
t
COIL
PZH
PHZ
PZH
PHZ
PZL
PLZ
PZL
PLZ
HYS
OZ
I
r
PD
PD
IT+
IT−
OH
OL
(P)
(P)
I
I
COIL
OD
and V
A
OC
V
= 25°C.
, respectively, that occur when the input is changed from one logic state to the other.
DD
Phone: [phone]
Min.
Min.
Min.
−0.2
12
5
5
− 0.2
6
DD1
OD1
DD1
or 1.5 V, whichever is greater.
= +3.3 V, C
V
= +5 V, C
DD
Typ.
Typ.
Typ.
85||9
0.2
70
25
50
10
55
12
17
2
4
4
4
4
4
5
5
5
− 0.2
Fax: [phone]
boost
boost
= 16pF)
= 16pF)
Max.
Max.
Max.
0.25
−0.8
0.2
0.8
10
85
17
40
40
40
40
85
20
10
10
10
10
10
1
8
www.IsoLoop.com
IL3185/IL3122
Ω||nH
Units
Units
Mbps
Units
Mbps
Ω/°C
mV
mA
µA
kΩ
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
V
V
V
T
V
V
−7 V < V
−7 V < V
V
V
I
V
I
0.4≤V
V
V
R
−1.5 ≤ V
C
−1.5 ≤ V
C
R
C
C
C
C
R
−1.5 ≤ V
C
−1.5 ≤ V
C
R
C
C
C
C
OH
OL
AMB
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
DD
DD
CM
ID
ID
I
I
©2008 NVE Corporation
= 12 V
= −7 V
= 15 pF
= 15 pF
= 15 pF
= 15 pF
= 54 Ω, C
= 54 Ω, C
= 15 pF
= 15 pF
= 15 pF
= 15 pF
= 54 Ω, C
= 54 Ω, C
= 15 pF
= 15 pF
= 15 pF
= 15 pF
Test Conditions
= 4 mA
Test Conditions
Test Conditions
= 4 mA
= 200 mV
= −200 mV
= 3.0 V to 5.5 V
= 3.0 V to 5.5 V
= 0V, T = 25°C
= 25°C
O
≤(V
O
O
O
O
CM
CM
≤ 1.5 V,
≤ 1.5 V,
≤ 1.5 V,
≤ 1.5 V,
DD2
< 12 V
< 12 V
L
L
L
L
= 50 pF
= 50 pF
= 50 pF
= 50 pF
− 0.5) V