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Linear Technology DC1880A Demo Manual

Ltc2874 quad io-link master hot swap controller and phy
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Description
Demonstration circuit 1880A showcases the
quad Hot Swap™ controller and PHY suitable for IO-Link
master and other applications. DC1880A operates from
an external supply V
and utilizes the DC590 USB serial
DD
controller board to communicate with the LTC2874 using
SPI protocol.
performance summary
SYMBOL
PARAMETER
V
Input Supply Range
DD
ΔV
L+ Analog Current Limit Voltage
ACL
ΔV
External N-Channel Gate Drive
GATE
(V
– V
)
GATE
L+
V
,
CQ Residual Voltage
RQH
V
RQL
I
,
Wake-Up Request (WURQ) Current
QPKH
I
QPKL
I
, I
CQ Current Limit
QH
QL
f
Maximum Data Transfer Rate
DTR
t
WURQ Pulse Duration
WU
SCK Frequency
DEMO MANUAL DC1880A
Hot Swap Controller and PHY
LTC
2874, a
Design files for this circuit board are available at
®
http://www.linear.com/demo/DC1880A
®
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap, QuikEval and Linduino are trademarks of Linear Technology Corporation. IO-Link is
a registered trademark of PROFIBUS User Organization (PNO). All other trademarks are the
property of their respective owners.
Specifications are at T
CONDITIONS
24VMODE = 0
24VMODE = 1
+
–
ΔV
= V
– V
ACL
SENSE
SENSE
V
= 0V, FLDBK_MODE = 1
L+
V
= V
– 1V
L+
DD
Start-Up, 2XPTC Enabled, V
L+
I
= –1µA
GATE
V
= 17V to 30V
DD
V
= 8V
DD
Output High, I
= –100mA
CQ
Output Low, I
= 100mA
CQ
f
= 4nF
DTR
SLEW = 0
SLEW = 1
50% Duty Cycle
Quad IO-Link Master
= 25°C, V
= 24V, and V
A
DD
MIN
20
9.2
42
> 18V
10
4.5
±500
±110
38.4
230.4
75
LTC2874
= 3.3V.
L
TYP
MAX
UNITS
8
30
30
16.7
24.2
mV
50
58
mV
100
mV
13
15
15
1.2
1.6
1.1
1.5
±700
mA
±160
±230
mA
kb/s
kb/s
80
85
µs
20
MHz
dc1880af
1
V
V
V
V
V
V
V

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Summary of Contents for Linear Technology DC1880A

  • Page 1 ® master and other applications. DC1880A operates from L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot an external supply V and utilizes the DC590 USB serial Swap, QuikEval and Linduino are trademarks of Linear Technology Corporation. IO-Link is a registered trademark of PROFIBUS User Organization (PNO).

  • Page 2: Quick Start Procedure

    DEMO MANUAL DC1880A Quick start proceDure Figure 1. Proper Setup dc1880af...
  • Page 3 4. Choose the source for the VL logic supply—the DC590, the LDO on the DC1880A, or either if both are set to 9. Launch the GUI software. Refer to the Using the the same voltage: LTC2874 Software section for more information on how to control the LTC2874 using the GUI.

  • Page 4: Additional Information

    JP2/4/8/10. See Table 3. The LTC2874 includes an open-drain interrupt line for signaling the host controller when it needs service. This signal is accessible on the DC1880A board at the IRQ test point. An LED is also included for convenience. dc1880af...
  • Page 5 DEMO MANUAL DC1880A aDDitional information Jumpers JP1/3/7/9: Port 4/3/2/1 CQ Driver Enables. See Table 2. JP5: COM PORT Enable. Connects RS232 transceiver U2 Default position VL. to VL logic supply. Default position ON. JP2/4/8/10: Port 4/3/2/1 Data Input to CQ Driver. See JP11: VL Select.
  • Page 6 LTC2874 registers to monitor status. Running QuikEval GUI Using Linduino One Connect/Disconnect Button The QuikEval GUI software for DC1880A may be operated The Disconnect button disables the SPI interface and most using a Linduino One (DC2026) with the DC590 emulator of the GUI.
  • Page 7 DEMO MANUAL DC1880A using the Dc1880a software Figure 2. Main Window, Ports Tab dc1880af...
  • Page 8 DEMO MANUAL DC1880A using the Dc1880a software Figure 3. Main Window, Timers and Globals Tab dc1880af...
  • Page 9 DEMO MANUAL DC1880A using the Dc1880a software Figure 4. Main Window, Events Tab Figure 5. Register Map Window dc1880af...

  • Page 10: Troubleshooting Guide

    (Error 1) Solution: Ensure VL supply power is applied correctly. Solution: Connect to PC using USB A/B cable. Referring to Table 1, check LDO jumper on the DC1880A and JP6 on the DC590. 3. Problem: LTC2874 not detected. (Error 2) 6.

  • Page 11: Parts List

    DEMO MANUAL DC1880A parts list ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP, 1µF 20%, 16V, X7R, 0603 TDK, C1608X7R1C105M CAP, 1µF 10%, 50V, X7R, 0805 MURATA, GRM21BR71H105KA12L CAP, ALUMINUM, 100µF, 20%, 63V UCC, EMZA630ADA101MJA0G D5-12* DIODE, TVS, 36V, SMA...
  • Page 12 DEMO MANUAL DC1880A parts list ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER J10-11 JACK, BANANA KEYSTONE, 575-4 HEADER, 2×7 2mm MOLEX, 87831-1420 JP1, JP3, JP7, JP9, JP11 HEADER, 2×3 2mm SAMTEC, TMM-103-02-L-D JP2, JP4, JP6, JP8, JP10 HEADER, 2×4 2mm SAMTEC, TMM-104-02-L-D JP5, JP12 HEADER, 1×2 2mm...

  • Page 13: Schematic Diagram

    Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
  • Page 14 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
  • Page 15 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC1880A...

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