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ADM3491AR-REEL7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 Data Sheet
Rev. E | Page 4 of 20
SPECIFICATIONS
V
CC
= 3.3 V ± 0.3 V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Differential Output Voltage (V
OD
) 2.0 V R
L
= 100 Ω (RS-422), V
CC
= 3.3 V ± 5% (see Figure 17)
1.5 V R
L
= 54 Ω (RS-485) (see Figure 17)
1.5 V R
L
= 60 Ω (RS-485), V
CC
= 3.3 V (see Figure 18)
∆ |V
OD
| for Complementary Output States
1
0.2 V R
L
= 54 Ω or 100 Ω (see Figure 17)
Common-Mode Output Voltage (V
OC
) 3 V R
L
= 54 Ω or 100 Ω (see Figure 17)
∆ |V
OC
| for Common-Mode Output Voltage
1
0.2 V R
L
= 54 Ω or 100 Ω (see Figure 17)
DRIVER INPUT LOGIC
CMOS Input Logic Threshold Low (V
IL
) 0.8 V
DE, DI, RE
CMOS Input Logic Threshold High (V
IH
) 2.0 V
DE, DI, RE
CMOS Logic Input Current (I
IN1
) ±2 µA
DE, DI, RE
1.0 mA V
IN
= 12 V, DE = 0 V, V
CC
= 0 V or 3.6 V Input Current—A, B (I
IN2
)
−0.8 mA V
IN
= −7 V, DE = 0 V, V
CC
= 0 V or 3.6 V
0.1 µA
V
IN
= 12 V, DE = 0 V, RE = 0 V, V
CC
= 0 V or 3.6 V,
ADM3491 only
Output Leakage—Y, Z (I
O
)
−0.1 µA
V
IN
= −7 V, DE = 0 V, RE = 0 V, V
CC
= 0 V or 3.6 V,
ADM3491 only
0.01 µA
V
IN
= 12 V, DE = 0 V, RE = V
CC
, V
CC
= 0 V or 3.6 V,
ADM3491 only
Output Leakage (Y, Z) in Shutdown Mode (I
O
)
−0.01 µA
V
IN
= −7 V, DE = 0 V, RE = V
CC
, V
CC
= 0 V or 3.6 V,
ADM3491 only
RECEIVER
Differential Input Threshold Voltage (V
TH
) −0.2 +0.2 V −7 V < V
CM
< +12 V
Input Hysteresis (∆ V
TH
) 50 mV V
CM
= 0 V
CMOS Output Voltage High (V
OH
) V
CC
– 0.4 V I
OUT
= −1.5 mA, V
ID
= 200 mV (see Figure 19)
CMOS Output Voltage Low (V
OL
) 0.4 V I
OUT
= 2.5 mA, V
ID
= 200 mV (see Figure 19)
Three-State Output Leakage Current (I
OZR
) ±1 µA V
CC
= 3.6 V, 0 V ≤ V
OUT
≤ V
CC
Input Resistance (R
IN
) 12 kΩ −7 V < V
CM
< +12 V
POWER SUPPLY CURRENT
1.1 2.2 mA
DE = V
CC
, RE = 0 V or V
CC
,
no load, DI = 0 V or V
CC
Supply Current (I
CC
)
0.95 1.9 mA
DE = 0 V, RE = 0 V, no load, DI = 0 V or V
CC
Supply Current in Shutdown Mode (I
SHDN
) 0.002 1 µA
DE = 0 V, RE
= V
CC
, DI = V
CC
or 0 V
−250 mA V
OUT
= −7 V Driver Short-Circuit Output Current (I
OSD
)
250 mA V
OUT
= 12 V
Receiver Short-Circuit Output Current (I
OSR
) ±8 ±60 mA 0 V < V
RO
< V
CC
1
∆V
OD
and ∆V
OC
are the changes in V
OD
and V
OC
, respectively, when DI input changes state.
Data Sheet ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
Rev. E | Page 5 of 20
TIMING SPECIFICATIONS—ADM3485/ADM3490/ADM3491
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Differential Output Delay (t
DD
) 1 22 35 ns
R
L
= 60 Ω (see Figure 20 and Figure 26)
Differential Output Transition Time (t
TD
) 3 8 25 ns
R
L
= 60 Ω (see Figure 20 and Figure 26)
Propagation Delay, Low-to-High Level (t
PLH
) 7 22 35 ns
R
L
= 27 Ω (see Figure 21 and Figure 27)
Propagation Delay, High-to-Low Level (t
PHL
) 7 22 35 ns
R
L
= 27 Ω (see Figure 21 and Figure 27)
|t
PLH
– t
PHL
| Propagation Delay Skew
1
(t
PDS
) 8 ns
R
L
= 27 Ω (see Figure 21 and Figure 27)
DRIVER OUTPUT ENABLE/DISABLE TIMES (ADM3485/
ADM3491 ONLY)
Output Enable Time to Low Level (t
PZL
) 45 90 ns
R
L
= 110 Ω (see Figure 23 and Figure 29)
Output Enable Time to High Level (t
PZH
) 45 90 ns
R
L
= 110 Ω (see Figure 22 and Figure 28)
Output Disable Time from High Level (t
PHZ
) 40 80 ns
R
L
= 110 Ω (see Figure 22 and Figure 28)
Output Disable Time from Low Level (t
PLZ
) 40 80 ns
R
L
= 110 Ω (see Figure 23 and Figure 29)
Output Enable Time from Shutdown to Low Level (t
PSL
) 650 900 ns
R
L
= 110 Ω (see Figure 23 and Figure 29)
Output Enable Time from Shutdown to High Level (t
PSH
) 650 900 ns
R
L
= 110 Ω (see Figure 22 and Figure 28)
1
Measured on |t
PLH
(Y) − t
PHL
(Y)| and |t
PLH
(Z) − t
PHL
(Z)|.
TIMING SPECIFICATIONS—ADM3483/ADM3488
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Table 4.
Parameter Min Typ Max Unit Test Conditions/Comments
DRIVER
Differential Output Delay (t
DD
) 600 900 1400 ns
R
L
= 60 Ω (see Figure 20 and Figure 26)
Differential Output Transition Time (t
TD
) 400 700 1200 ns
R
L
= 60 Ω (see Figure 20 and Figure 26)
Propagation Delay, Low-to-High Level (t
PLH
) 700 1000 1500 ns
R
L
= 27 Ω (see Figure 21 and Figure 27)
Propagation Delay, High-to-Low Level (t
PHL
) 700 1000 1500 ns
R
L
= 27 Ω (see Figure 21 and Figure 27)
|t
PLH
– t
PHL
| Propagation Delay Skew
1
(t
PDS
) 100 ns
R
L
= 27 Ω (see Figure 21 and Figure 27)
DRIVER OUTPUT ENABLE/DISABLE TIMES (ADM3483 ONLY)
Output Enable Time to Low Level (t
PZL
) 900 1300 ns
R
L
= 110 Ω (see Figure 23 and Figure 29)
Output Enable Time to High Level (t
PZH
) 600 800 ns
R
L
= 110 Ω (see Figure 22 and Figure 28)
Output Disable Time from High Level (t
PHZ
) 50 80 ns
R
L
= 110 Ω (see Figure 22 and Figure 28)
Output Disable Time from Low Level (t
PLZ
) 50 80 ns
R
L
= 110 Ω (see Figure 23 and Figure 29)
Output Enable Time from Shutdown to Low Level (t
PSL
) 1.9 2.7 µs
R
L
= 110 Ω (see Figure 23 and Figure 29)
Output Enable Time from Shutdown to High Level (t
PSH
) 2.2 3.0 s
R
L
= 110 Ω (see Figure 22 and Figure 28)
1
Measured on |t
PLH
(Y) − t
PHL
(Y)| and |t
PLH
(Z) − t
PHL
(Z)|.
ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 Data Sheet
Rev. E | Page 6 of 20
TIMING SPECIFICATIONS—ADM3483/ADM3485/ADM3488/ADM3490/ADM3491
V
CC
= 3.3 V, T
A
= 25°C, unless otherwise noted.
Table 5.
Parameter Min Typ Max Unit Test Conditions/Comments
RECEIVER
Time to Shutdown (t
SHDN
)
ADM3483/ADM3485/ADM3491
1
80 190 300 ns
Propagation Delay, Low-to-High Level (t
RPLH
)
ADM3485/ADM3490/ADM3491 25 65 90 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 24 and Figure 30)
ADM3483/ADM3488 25 75 120 ns
Propagation Delay, High-to-Low Level (t
RPHL
)
ADM3485/ADM3490/ADM3491 25 65 90 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 24 and Figure 30)
ADM3483/ADM3488 25 75 120 ns
|t
PLH
– t
PHL
| Propagation Delay Skew (t
RPDS
)
ADM3485/ADM3490/ADM3491 10 ns V
ID
= 0 V to 3.0 V, C
L
= 15 pF (see Figure 24 and Figure 30)
ADM3483/ADM3488 20 ns
RECEIVER OUTPUT ENABLE/DISABLE TIMES
(ADM3483/ADM3485/ADM3491 ONLY)
Output Enable Time to Low Level (t
PRZL
) 25 50 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Enable Time to High Level (t
PRZH
) 25 50 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Disable Time from High Level (t
PRHZ
) 25 45 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Disable Time from Low Level (t
PRLZ
) 25 45 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Enable Time from Shutdown to
Low Level (t
PRSL
)
720 1400 ns C
L
= 15 pF (see Figure 25 and Figure 31)
Output Enable Time from Shutdown to
High Level (t
PRSH
)
720 1400 ns C
L
= 15 pF (see Figure 25 and Figure 31)
1
The transceivers are put into shutdown by bringing the
RE
high and DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to enter
shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

ADM3491AR-REEL7

Mfr. #:
Buy ADM3491AR-REEL7
Manufacturer:
Analog Devices Inc.
Description:
RS-422/RS-485 Interface IC 3V FULL DUPLEX RS 485 I.C.
Lifecycle:
New from this manufacturer.
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