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SI88X4X Datasheet, PDF (8/48 Pages) Silicon Laboratories – Precise timing on digital isolators | |||
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Si88x4x
Table 2. Electrical Characteristics1 (Continued)
VIN = 24 V; VDDA = 4.3 V (see Figure 3) for all Si8844x/64x; VDDA = VDDP = 3.0 to 5.5 V (see Figure 2) for all Si8824x/34x;
TA = â40 to 125 °C unless otherwise noted
Parameter
Symbol
Test Condition
Min Typ Max Unit
Si88x41
mA
VDDA
VDDB
â 12.7 â
â 16.6 â
Si88x42
mA
VDDA
VDDB
â 15.6 â
â 13.6 â
Si88x43
mA
VDDA
VDDB
â 18.7 â
â 11.0 â
Si88x44
mA
VDDA
VDDB
â 21.6 â
â
6.9
â
Notes:
1. Over recommended operating conditions as noted in Table 1.
2. VOUT = VSNS x (1 + R1/R2) + R1 x Ioffset
3. VDDP current needed for dc-dc circuits.
4. VDDA current needed for dc-dc circuits.
5. The nominal output impedance of an isolator driver channel is approximately 50 ï, ±40%, which is a combination of the
value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving loads
where transmission line effects will be a factor, output pins should be appropriately terminated with controlled
impedance PCB traces.
6. tPSK(P-P) is the magnitude of the difference in propagation delay times measured between different units operating at
the same supply voltages, load, and ambient temperature.
7. Start-up time is the time period from when the UVLO threshold is exceeded to valid data at the output.
8
Preliminary Rev. 0.6
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