LTC2850/LTC2851/LTC2852

5

285012fe

For more information www.linear.com/LTC2850

SWITCHING CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime. High temperatures degrade operating lifetimes.

Operating lifetime is derated at temperatures greater than 105°C.

Note 2: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to device ground unless

otherwise specified.

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, unless otherwise noted. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Driver

fMAX

Maximum Data Rate

(Note 3)

l

20

Mbps

tPLHD, tPHLD Driver Input to Output

RDIFF = 54Ω, CL = 100pF (Figure 4)

l

10

50

ns

ΔtPD

Driver Input to Output Difference

|tPLHD – tPHLD|

RDIFF = 54Ω, CL = 100pF (Figure 4)

l

1

6

ns

tSKEWD

Driver Output Y to Output Z

RDIFF = 54Ω, CL = 100pF (Figure 4)

l

1

±6

ns

tRD, tFD

Driver Rise or Fall Time

RDIFF = 54Ω, CL = 100pF (Figure 4)

l

4

12.5

ns

tZLD, tZHD,

tLZD, tHZD

Driver Enable or Disable Time

RL = 500Ω, CL = 50pF, RE = 0V (Figure 5)

(LTC2850, LTC2852)

l

70

ns

tZHSD, tZLSD Driver Enable from Shutdown

RL = 500Ω, CL = 50pF, RE = VCC (Figure 5)

(LTC2850, LTC2852)

l

8

µs

tSHDN

Time to Shutdown

RL = 500Ω, CL = 50pF, (DE = ↓, RE = VCC)

or (DE = 0V, RE = ↑) (Figure 5) (LTC2850,

LTC2852)

l

100

ns

Receiver

tPLHR, tPHLR Receiver Input to Output

CL = 15pF, VCM = 1.5V, |VAB| = 1.5V,

tR and tF < 4ns (Figure 6)

l

50

70

ns

tSKEWR

Differential Receiver Skew

|tPLHR – tPHLR|

CL = 15pF (Figure 6)

l

1

6

ns

tRR, tFR

Receiver Output Rise or Fall Time

CL = 15pF (Figure 6)

l

3

12.5

ns

tZLR, tZHR,

tLZR, tHZR

Receiver Enable/Disable

RL =1k, CL =15pF, DE = VCC (Figure 7)

(LTC2850, LTC2852)

l

50

ns

tZHSR, tZLSR Receiver Enable from Shutdown

RL = 1k, CL = 15pF, DE = 0V (Figure 7)

(LTC2850, LTC2852)

l

8

µs

Note 3: Maximum data rate is guaranteed by other measured parameters

and is not tested directly.

Note 4: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions.

Overtemperature protection activates at a junction temperature exceeding

150°C. Continuous operation above the specified maximum operating

junction temperature may result in device degradation or failure.

ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, unless otherwise noted. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supplies

ICCS

Supply Current in Shutdown Mode

DE = 0V, RE = VCC,

LTC2850, LTC2852 (C and I-Grade)

LTC2850, LTC2852 (H-Grade)

l

l

0

0

5

15

µA

µA

ICCR

Supply Current in Receive Mode

DE = 0V, RE = 0V (LTC2850, LTC2852)

l

370

900

µA

ICCT

Supply Current in Transmit Mode

No Load, DE = VCC, RE = VCC (LTC2850,

LTC2852)

l

450

1000

µA

ICCTR

Supply Current with Both Driver and

Receiver Enabled

No Load, DE = VCC, RE = 0V

l

450

1000

µA