SI88240ED-IS Datasheet, PDF (3/48 Pages) Silicon Laboratories – QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER

Si88x4x
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Ambient Operating Temperature*
T_A
–40
25
125
°C
Power Input Voltage
VDDP
3.0
—
5.5
V
Supply Voltage
VDDA
3.0
—
5.5
V
VDDB
3.0
—
5.5
V
*Note: The maximum ambient temperature is dependent on data frequency, output loading, number of operating channels,
and supply voltage.
Table 2. Electrical Characteristics¹
V_IN = 24 V; V_DDA = 4.3 V (see Figure 3) for all Si8844x/64x; V_DDA = V_DDP = 3.0 to 5.5 V (see Figure 2) for all Si8824x/34x;
T_A = –40 to 125 °C unless otherwise noted
Parameter
Symbol
Test Condition
Min Typ Max Unit
DC/DC Converter
Switching Frequency
Si8824x, Si8844x
FSW
250
kHz
Switching Frequency
Si8834x, Si8864x
FSW
RFSW = 23.3 k
180 200 220 kHz
FSW = 1025.5/(RFSW x CSS)
CSS = 220 nF (see Figure 9)
(1% tolerance on BOM)
RFSW = 9.3 k
450 500 550 kHz
FSW = 1025.5/(RFSW x CSS)
CSS = 220 nF (see Figure 9)
(1% tolerance on BOM)
RFSW = 5.18 k,
810 900 990 kHz
CSS = 220 nF (see Figure 9)
VSNS voltage
VSNS
ILOAD = 0 A
1.002 1.05 1.097 V
VSNS current offset
I_offset
–500 —
500
nA
Notes:
1. Over recommended operating conditions as noted in Table 1.
2. VOUT = VSNS x (1 + R1/R2) + R1 x I_offset
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 , ±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.
Preliminary Rev. 0.6
3