ADM487EARZ datasheet(5/16 Pages) AD

5 / 16 page

ADM485E/ADM487E/ADM1487E

Rev. 0 | Page 5 of 16

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

Table 4. ADM487E

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

DRIVER

Input to Output

tDPLH

250

800

2000

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

tDPHL

250

800

2000

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

Output Skew to Output

tSKEW

250

800

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

Rise/Fall Time

tDR, tDF

250

2000

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

Enable Time to High Level

tDZH

250

2000

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

Enable Time to Low Level

tDZL

2000

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

Disable Time from Low Level

tDLZ

300

3000

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

Disable Time from High Level

tDHZ

300

3000

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

RECEIVER

Input to Output

tRPLH

250

2000

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

tRPHL

250

2000

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(see Figure 19 and Figure 20)

|tPLH − tPHL| Differential Receiver Skew

tSKEW

100

CRL = 15 pF, S1 closed

(see Figure 23 and Figure 24)

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

250

kbps

Time to Shutdown1

tDZH(SHDN)

200

600

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

Driver Enable from Shutdown to Output High

tDZL(SHDN)

5000

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

Driver Enable from Shutdown to Output Low

tRZL(SHDN)

5000

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

Receiver Enable from Shutdown to Output High

tRZH(SHDN)

5000

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

1 The ADM487E is put into shutdown mode by bringing the RE high and the DE low. If the inputs are in this state for less than 50 ns, the parts are guaranteed not to

enter shutdown. If the inputs are in this state for at least 600 ns, the ADM487E is guaranteed to enter shutdown.

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