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SI88320BD-IS Fiches technique(PDF) 3 Page - Silicon Laboratories

No de pièce SI88320BD-IS
Description  DUAL DIGITAL ISOLATORS WITH DC-DC CONVERTER
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Fabricant  SILABS [Silicon Laboratories]
Site Internet  http://www.silabs.com
Logo SILABS - Silicon Laboratories

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Si88x2x
Rev. 0.5
3
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Ambient Operating Temperature
TA
–4025125
°C
Power Input Voltage
VDDP
3.0
5.5
V
Supply Voltage
VDDA
3.0
5.5
V
VDDB
3.0
5.5
V
Table 2. Electrical Characteristics1
VIN =24 V; VDDA =VDDP = 3.0 to 5.5 V (see Figure 2) for all Si8822x/32x; VDDA = 4.3 V (see Figure 3) for all Si8842x/62x;
TA = –40 to 125 °C unless otherwise noted.
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
DC/DC Converter
Switching Frequency
Si8822x, Si8842x
FSW
250
kHz
Switching Frequency
Si8832x, Si8862x
FSW
RFSW = 23.3 k
FSW = 1025.5/(RFSW x CSS)
CSS = 220 nF (see Figure 9)
(1% tolerance on BOM)
180
200
220
kHz
RFSW = 9.3 k
FSW = 1025.5/(RFSW x CSS)
CSS = 220 nF (see Figure 9)
(1% tolerance on BOM)
450
500
550
kHz
RFSW = 5.18 k
,
CSS
= 220 nF (see Figure 9)
810
900
990
kHz
VSNS voltage
VSNS
ILOAD = 0 A
1.002
1.05
1.097
V
VSNS current offset
Ioffset
–500
500
nA
Output Voltage
Accuracy2
See Figure 2
ILOAD = 0 mA
–5
+5
%
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
, ±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.


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