EVAL-LT8440-AZ Evaluation Board User Guide
User guide for the EVAL-LT8440-AZ evaluation board, featuring the LT8440 power conditioner for intrinsically safe Ethernet-APL field devices with triple redundancy.
Overview
The EVAL-LT8440-AZ evaluation circuit demonstrates the LT8440 power conditioner's performance in a load power port of an intrinsically safe field device. It is designed to regulate and limit power consumption according to Ethernet Advanced Physical Layer (Ethernet-APL) standards. To meet the Ex ia triple redundancy requirement for Class A field devices, the board incorporates three LT8440s in series. It operates from a 9V to 17.5V input range, ensuring a minimum of 500mW load power while limiting total input power below 650mW. The design includes input protection components, common-mode and differential-mode filters, and a diode bridge for polarity insensitivity, all compliant with IEC60079-11 and IEC60079-47 standards while maintaining 10BASE-T1L signal integrity.
Use Cases
- Power regulation for Ethernet-APL field devices
- Intrinsically safe industrial automation equipment
- Hazardous area 10BASE-T1L communication nodes
- Redundant power limiting for Ex ia applications
- Current shunt management for APL signal integrity
Topics
Referenced Parts
Analog Devices
Connect a 10BASE-T1L transceiver (ADIN1110 or ADIN1100) to the header J2 to receive communication signals.
Analog Devices
Connect a 10BASE-T1L transceiver (ADIN1110 or ADIN1100) to the header J2 to receive communication signals.
MSD1260-224KLD
Coilcraft Inc.
IND., SHIELDED, COUPLED, 1.02A, 0.691Ω DCR
BAT165E6327HTSA1
Infineon Technologies
DIO., SCHOTTKY, 40V, 0.75A, SOD-323, AEC-Q101
C1812C470JHGAC7800
KEMET
CAP., CER., 47pF, 3000V, 5%, C0G, 1812, HIGH VOLTAGE, LOW ESL
AEC-Q200
Kemet
AEC-Q200 KEMET, C0603X473K5RACTU
AEC-Q200
Panasonic
2 0 R10, R13 RES., SMD, 0Ω, 1/8W, 0805, AEC-Q200 PANASONIC, ERJ-6GEY0R00V
AEC-Q200
Panasonic
3 5 R6, R9, R39-R41 RES., SMD, 0Ω, 1/8W, 0805, AEC-Q200 PANASONIC, ERJ-6GEY0R00V
AEC-Q200
Panasonic
AEC-Q200 PANASONIC, ERJ-3EKF2002V
AEC-Q200
Taiyo Yuden
AEC-Q200 TAIYO YUDEN, HMK107C7224KAHTE
AEC-Q200
Vishay
13 1 R5 RES., SMD, 1Ω, 1%, 1/8W, 0805, AEC-Q200 VISHAY, CRCW08051R00FKEA
AEC-Q200
Vishay
RES., SMD, 10kΩ, 1%, 1/2W, 0805, AEC-Q200 VISHAY, CRCW080510K0FKEAHP
AEC-Q200
Wurth Elektronik
100kHz, 1A, 0.15Ω, AEC-Q200 WURTH ELEKTRONIK, 744223
| C0603X473K5RACTU | Kemet | CAP., CER., 0.047μF, 50V, 10%, X7R, 0603, AEC-Q200 |
| 5004 | Keystone Electronics | CONN-PCB, TEST POINT, YELLOW |
| 8832 | Keystone Electronics | STANDOFF, BRD. SPT. SNAP FIT 9.53MM LENGTH |
| 2308-2-00-80-00-00-07-0 | Mill-Max | CONN-PCB, SOLDER TERMINAL TURRETS FOR CLIP LEADS |
| ERJ-3EKF2002V | Panasonic | RES., SMD, 20kΩ, 1%, 1/10W, 0603, AEC-Q200 |
| ERJ-6GEY0R00V | Panasonic | RES., SMD, 0Ω, 1/8W, 0805, AEC-Q200 |
| SM4T30CAY | Stmicroelectronics | TVS DIODE, BIDIRECTIONAL, 26V, 400W, AEC-Q101 |
| TSW-102-08-G-S | Samtec | CONN-PCB, HEADER 2 POS |
| C2012X7R1H224K125AA | TDK | CAP., CER., 0.22μF, 50V, 10%, X7R, 0805, LOW ESR |
| 284392-3 | TE Connectivity | CONN-PCB, 3POS, EUROSTYLE, TERM, BLK., HDR, 3.81MM PITCH |
| CPF0805B7K5E1 | TE Connectivity | RES., SMD, 7.5kΩ, 1%, 1/10W, 0805 |
| HMK107C7224KAHTE | Taiyo Yuden | CAP., CER., 0.22μF, 100V, 10%, X7S, 0603, AEC-Q200 |
| CRCW080510K0FKEAHP | Vishay | RES., SMD, 10kΩ, 1%, 1/2W, 0805, AEC-Q200 |
| CRCW08051R00FKEA | Vishay | RES., SMD, 1Ω, 1%, 1/8W, 0805, AEC-Q200 |
| LT8440RS8E#PBF | Analog Devices | IC-ADI POWER CONDITIONER FOR APL FIELD DEVICES |
| S1AFL | Onsemi | DIO., GEN. PURPOSE RECTIFIER, 50V, 1A |
| 744223 | Wurth Electronics | IND., COMMON MODE CHOKE, 500μH, 3.3kΩ, 100kHz, 1A, 0.15Ω, AEC-Q200 |
| ADIN1100 | Analog Devices | Connect a 10BASE-T1L transceiver (ADIN1110 or ADIN1100) to the header J2 to receive communication signals. |
| ADIN1110 | Analog Devices | Connect a 10BASE-T1L transceiver (ADIN1110 or ADIN1100) to the header J2 to receive communication signals. |
| MSD1260-224KLD | Coilcraft Inc. | IND., SHIELDED, COUPLED, 1.02A, 0.691Ω DCR |
| BAT165E6327HTSA1 | Infineon Technologies | DIO., SCHOTTKY, 40V, 0.75A, SOD-323, AEC-Q101 |
| C1812C470JHGAC7800 | KEMET | CAP., CER., 47pF, 3000V, 5%, C0G, 1812, HIGH VOLTAGE, LOW ESL |
| AEC-Q200 | Kemet | AEC-Q200 KEMET, C0603X473K5RACTU |
| AEC-Q200 | Panasonic | 2 0 R10, R13 RES., SMD, 0Ω, 1/8W, 0805, AEC-Q200 PANASONIC, ERJ-6GEY0R00V |
| AEC-Q200 | Panasonic | 3 5 R6, R9, R39-R41 RES., SMD, 0Ω, 1/8W, 0805, AEC-Q200 PANASONIC, ERJ-6GEY0R00V |
| AEC-Q200 | Panasonic | AEC-Q200 PANASONIC, ERJ-3EKF2002V |
| AEC-Q200 | Taiyo Yuden | AEC-Q200 TAIYO YUDEN, HMK107C7224KAHTE |
| AEC-Q200 | Vishay | 13 1 R5 RES., SMD, 1Ω, 1%, 1/8W, 0805, AEC-Q200 VISHAY, CRCW08051R00FKEA |
| AEC-Q200 | Vishay | RES., SMD, 10kΩ, 1%, 1/2W, 0805, AEC-Q200 VISHAY, CRCW080510K0FKEAHP |
| AEC-Q200 | Wurth Elektronik | 100kHz, 1A, 0.15Ω, AEC-Q200 WURTH ELEKTRONIK, 744223 |