Техническая Спецификация для Linear Technology LTM2881-5 low EMI test board (for EMI evaluation purposes only, no VL & no GPIO) DC1746A-B DC1746A-B
Модели
DC1746A-B
LTM2881
3
2881ff
For more information
elecTrical characTerisTics
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply
V
V
CC
V
CC
Supply Voltage
LTM2881-3
LTM2881-5
l
l
3.0
4.5
3.3
5.0
3.6
5.5
V
V
V
L
V
L
Supply Voltage
l
1.62
5.5
V
I
CCPOFF
V
CC
Supply Current in Off Mode
ON = 0V
l
0
10
µA
I
CCS
V
CC
Supply Current in On Mode
LTM2881-3 DE = 0V, RE = V
L
, No Load
LTM2881-5 DE = 0V, RE = V
L
, No Load
LTM2881-5, H/MP-Grade
l
l
l
20
15
25
19
20
mA
mA
mA
V
CC2
Regulated V
CC2
Output Voltage,
Loaded
LTM2881-3 DE = 0V, RE = V
L
, I
LOAD
= 100mA
LTM2881-5 DE = 0V, RE = V
L
, I
LOAD
= 150mA
LTM2881-3, H/MP-Grade, I
LOAD
= 90mA
l
l
l
4.75
4.75
4.75
5.0
5.0
V
V
V
V
CC2NOLOAD
Regulated V
CC2
Output Voltage,
No Load
DE = 0V, RE = V
L
, No Load
4.8
5.0
5.35
V
Efficiency
I
CC2
= 100mA, LTM2881-5 (Note 2)
62
%
I
CC2S
V
CC2
Short-Circuit Current
DE = 0V, RE = V
L
, V
CC2
= 0V
l
250
mA
Driver
|V
|V
OD
|
Differential Driver Output Voltage R = ∞ (Figure 1)
R = 27Ω (RS485) (Figure 1)
R = 50Ω (RS422) (Figure 1)
l
l
l
2.1
2.1
V
CC2
V
CC2
V
CC2
V
V
V
∆|V
OD
|
Difference in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
R = 27Ω or R = 50Ω (Figure 1)
l
0.2
V
V
OC
Driver Common Mode Output
Voltage
R = 27Ω or R = 50Ω (Figure 1)
l
3
V
∆|V
OC
|
Difference in Magnitude of Driver
Common Mode Output Voltage
for Complementary Output States
R = 27Ω or R = 50Ω (Figure 1)
l
0.2
V
I
OZD
Driver Three-State (High
Impedance) Output Current on
Y and Z
DE = 0V, (Y or Z) = –7V, +12V
DE = 0V, (Y or Z) = –7V, +12V, H/MP-Grade
l
l
±10
±50
µA
µA
I
OSD
Maximum Driver Short-Circuit
Current
–7V ≤ (Y or Z) ≤ 12V (Figure 2)
l
– 250
250
mA
Receiver
R
R
IN
Receiver Input Resistance
RE = 0V or V
L
, V
IN
= –7V, –3V, 3V, 7V, 12V (Figure 3)
RE = 0V or V
L
, V
IN
= –7V, –3V, 3V, 7V, 12V (Figure 3),
H/MP-Grade
l
l
96
48
125
125
kΩ
kΩ
R
TE
Receiver Termination Resistance
Enabled
TE = V
L
, V
AB
= 2V, V
B
= –7V, 0V, 10V (Figure 8)
l
108
120
156
Ω
I
IN
Receiver Input Current (A, B)
ON = 0V V
CC2
= 0V or 5V, V
IN
= 12V (Figure 3)
ON = 0V V
CC2
= 0V or 5V, V
IN
= 12V (Figure 3), H/MP-Grade
l
l
125
250
µA
ON = 0V V
CC2
= 0V or 5V, V
IN
= –7V (Figure 3)
ON = 0V V
CC2
= 0V or 5V, V
IN
= –7V (Figure 3), H/MP-Grade
l
l
–100
–145
µA
V
TH
Receiver Differential Input
Threshold Voltage (A-B)
–7V ≤ B ≤ 12V
l
–0.2
0.2
V
∆V
TH
Receiver Input Failsafe Hysteresis B = 0V
25
mV
Receiver Input Failsafe Threshold B = 0V
–0.2
–0.05
0
V
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2881-3 V
CC
= 3.3V, LTM2881-5 V
CC
= 5.0V, V
L
= 3.3V, GND = GND2 =
0V, ON = V
L
unless otherwise noted.