ADM487E datasheet(4/16 Pages) AD

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ADM485E/ADM487E/ADM1487E

Rev. 0 | Page 4 of 16

TIMING SPECIFICATIONS

VCC = 5 V ± 5%, TA = TMIN to TMAX, unless otherwise noted.

Table 3. ADM485E/ADM1487E

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

DRIVER

Input to Output

tDPLH

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

tDPHL

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

Output Skew to Output

tSKEW

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

Rise/Fall Time

tDR, tDF

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

Enable Time to High Level

tDZH

CRL = 100 pF, S2 closed (see Figure 21)

Enable Time to Low Level

tDZL

CRL = 100 pF, S1 closed (see Figure 22)

Disable Time from Low Level

tDLZ

CRL = 15 pF, S1 closed (see Figure 22)

Disable Time from High Level

tDHZ

CRL = 15 pF, S2 closed (see Figure 21)

RECEIVER

Input to Output

tRPLH

200

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 23 and Figure 24)

|tPLH − tPHL| Differential Receiver Skew

tSKEW

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 4 and Figure 5)

Enable Time to Low Level

tRZL

CRL = 15 pF, S2 closed (see Figure 25)

Enable Time to High Level

tRZL

CRL = 15 pF, S1 closed (see Figure 25)

Disable Time from Low Level

tRLZ

CRL = 15 pF, S2 closed (see Figure 25)

Disable Time from High Level

tRHZ

tPLH, tPHL < 50% of data period

MAXIMUM DATA RATE

fMAX

2.5

Mbps

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