EVAL-ADUM4160EBZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-ADUM4160EBZ' PDF : 16 Pages View PDF
Data Sheet
ADuM3160
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VBUS1 1
GND1* 2
VDD1 3
PDEN 4
SPU 5
UD– 6
UD+ 7
GND1* 8
ADuM3160
TOP VIEW
(Not to Scale)
16 VBUS2
15 GND2*
14 VDD2
13 SPD
12 PIN
11 DD–
10 DD+
9 GND2*
*PIN 2 AND PIN 8 ARE INTERNALLY CONNECTED TO EACH OTHER, AND IT
IS RECOMMENDED THAT BOTH PINS BE CONNECTED TO A COMMON GROUND.
PIN 9 AND PIN 15 ARE INTERNALLY CONNECTED TO EACH OTHER, AND IT
IS RECOMMENDED THAT BOTH PINS BE CONNECTED TO A COMMON GROUND.
Figure 3. Pin Configuration
Table 9. Pin Function Descriptions
Pin No. Mnemonic Direction
1
VBUS1
Power
2
GND1
Return
3
VDD1
Power
4
PDEN
Input
5
SPU
Input
6
UD−
7
UD+
8
GND1
9
GND2
10
DD+
11
DD−
12
PIN
13
SPD
Input/Output
Input/Output
Return
Return
Input/Output
Input/Output
Input
Input
14
VDD2
Power
15
GND2
16
VBUS2
Return
Power
Description
Input Power Supply for Side 1. When the isolator is powered by the USB bus voltage (4.5 V to 5.5 V),
connect the VBUS1 pin to the USB power bus. When the isolator is powered from a 3.3 V power supply,
connect VBUS1 to VDD1 and to the external 3.3 V power supply. A bypass capacitor to GND1 is required.
Ground 1. Ground reference for Isolator Side 1. Pin 2 and Pin 8 are internally connected to each
other, and it is recommended that both pins be connected to a common ground.
Input Power Supply for Side 1. When the isolator is powered by the USB bus voltage (4.5 V to 5.5 V),
the VDD1 pin should be used for a bypass capacitor to GND1. Signal lines that may require pull-up, such
as PDEN and SPU, should be tied to this pin. When the isolator is powered from a 3.3 V power supply,
connect VBUS1 to VDD1 and to the external 3.3 V power supply. A bypass capacitor to GND1 is required.
Pull-Down Enable. This pin is read when exiting reset. This pin must be connected to VDD1 for standard
operation. If this pin is connected to GND1 when exiting reset, the downstream pull-down resistors
are disconnected, allowing buffer impedance measurements.
Speed Select, Upstream Buffer. Active high logic input. When SPU is tied high, the full speed slew
rate, timing, and logic conventions are selected; when SPU is tied low, the low speed slew rate,
timing, and logic conventions are selected. This input must be set high via connection to VDD1 or set
low via connection to GND1 and must match Pin 13 (both pins tied high or both pins tied low).
Upstream D−.
Upstream D+.
Ground 1. Ground reference for Isolator Side 1. Pin 2 and Pin 8 are internally connected to each
other, and it is recommended that both pins be connected to a common ground.
Ground 2. Ground reference for Isolator Side 2. Pin 9 and Pin 15 are internally connected to each
other, and it is recommended that both pins be connected to a common ground.
Downstream D+.
Downstream D−.
Upstream Pull-Up Enable. PIN controls the power connection to the pull-up for the upstream port.
It can be tied to VDD2 for operation on power-up, or it can be tied to an external control signal for an
application that requires delayed enumeration.
Speed Select, Downstream Buffer. Active high logic input. When SPD is tied high, the full speed
slew rate, timing, and logic conventions are selected; when SPD is tied low, the low speed slew rate,
timing, and logic conventions are selected. This input must be set high via connection to VDD2 or set
low via connection to GND2 and must match Pin 5 (both pins tied high or both pins tied low).
Input Power Supply for Side 2. When the isolator is powered by the USB bus voltage (4.5 V to 5.5 V),
the VDD2 pin should be used for a bypass capacitor to GND2. Signal lines that may require pull-up,
such as SPD, can be tied to this pin. When the isolator is powered from a 3.3 V power supply, connect
VBUS2 to VDD2 and to the external 3.3 V power supply. A bypass capacitor to GND2 is required.
Ground 2. Ground reference for Isolator Side 2. Pin 9 and Pin 15 are internally connected to each
other, and it is recommended that both pins be connected to a common ground.
Input Power Supply for Side 2. When the isolator is powered by the USB bus voltage (4.5 V to 5.5 V),
connect the VBUS2 pin to the USB power bus. When the isolator is powered from a 3.3 V power supply,
connect VBUS2 to VDD2 and to the external 3.3 V power supply. A bypass capacitor to GND2 is required.
Rev. C | Page 7 of 16
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