LTC2858CMS8-2 Просмотр технического описания (PDF) - Analog Devices
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производитель
LTC2858CMS8-2 Datasheet PDF : 20 Pages
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LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. (Note 2)
SYMBOL
Driver
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
|VOD|
Differential Driver Output Voltage
R = ∞, VCC = 4.5V (Figure 1)
l
VCC
V
R = 27Ω (RS485), VCC = 4.5V (Figure 1) l 1.5
VCC
V
R = 50Ω (RS422), VCC = 4.5V (Figure 1) l
2
VCC
V
Δ|VOD|
Change in Magnitude of Driver Differential
R = 27Ω or R = 50Ω (Figure 1)
l
Output Voltage for Complementary Output
States
0.2
V
VOC
Driver Common Mode Output Voltage
R = 27Ω or R = 50Ω (Figure 1)
l
3
V
Δ|VOC|
Change in Magnitude of Driver Common Mode R = 27Ω or R = 50Ω (Figure 1)
l
Output Voltage for Complementary Output
States
0.2
V
IOZD
Driver Three-State (High Impedance) Output DE = 0V, (Y or Z) = –7V, 12V, LTC2858-1, l
Current on Y and Z
LTC2858-2
H-Grade
l
±10
µA
±50
µA
IOSD
Maximum Driver Short-Circuit Current
–7V ≤ (Y or Z) ≤ 12V (Figure 2)
l
±120 ±250
mA
Receiver
IIN
RIN
VTH
ΔVTH
VOH
VOL
IOZR
Logic
Receiver Input Current (A, B)
DE = TE = 0V, VCC = 0V or 5V, VIN = 12V l
(Figure 3) (C, I-Grade)
DE = TE = 0V, VCC = 0V or 5V, VIN = –7V, l –100
(Figure 3) (C, I-Grade)
125
µA
µA
DE = TE = 0V, VCC = 0V or 5V, VIN = 12V l
(Figure 3) (H-Grade)
DE = TE = 0V, VCC = 0V or 5V, VIN = –7V, l –145
(Figure 3) (H-Grade)
250
µA
µA
Receiver Input Resistance
RE = VCC or 0V, DE = TE = 0V,
l 96
125
kW
VIN = –7V, –3V, 3V, 7V, 12V (Figure 3)
(C, I-Grade)
RE = VCC or 0V, DE = TE = 0V,
l 48
125
kW
VIN = –7V, –3V, 3V, 7V, 12V (Figure 3)
(H-Grade)
Receiver Differential Input Threshold Voltage –7V ≤ B ≤ 12V
l
±0.2
V
Receiver Input Hysteresis
B = 0V
25
mV
Receiver Output High Voltage
I(RO) = –4mA, A-B = 200mV, VCC = 4.5V l 2.4
Receiver Output Low Voltage
I(RO) = 4mA, A-B = –200mV, VCC = 4.5V l
Receiver Three-State (High Impedance) Output RE = 5V, 0V ≤ RO ≤ VCC, LTC2856-1,
l
Current on RO
LTC2856-2, LTC2858-1, LTC2858-2
V
0.4
V
±1
µA
VIH
VIL
IINL
Supplies
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
DE, DI, RE, VCC = 5.5V
DE, DI, RE, VCC = 4.5V
DE, DI, RE
l
2
l
l
V
0.8
V
0
±10
µA
ICCS
Supply Current in Shutdown Mode
ICCR
Supply Current in Receive Mode
DE = 0V, RE = VCC,
l
LTC2856, LTC2858 (C and I-Grade)
LTC2856, LTC2858 (H-Grade)
l
No Load, DE = 0V, RE = 0V, LTC2856-1, l
LTC2856-2, LTC2858-1, LTC2858-2
0
5
µA
0
15
µA
540
900
µA
285678fg
4
For more information www.linear.com/LTC2856-1
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