Advanced Communication & Sensing New Zooming ADC Family Device Migration Zooming ADC Part Migration SX8723E, SX8724E, SX8725E devices are not recommended for new design. Semtech recommends the new family SX8723C, SX8724C, SX8725C. Note that the ZoomingADC also exists with a SPI communication interface, SX8723S, SX8724S, SX8725S. Old Device Reel Quantity SX8723E083TDT 1000 SX8723E083TRT 3000 SX8724E082TDT 1000 SX8724E082TRT 3000 SX8725E083TDT 1000 SX8725E083TRT 3000 Recommended Devices Reel Quantity SX8723CWLTDT 1000 SX8724CWLTDT 1000 SX8725CWLTDT 1000 Old EVK Recommended Replacement SX8000EV121 SX8724CEVK Compatibility: The recommended devices have been designed to ensure maximum compatibility with old parts: • Same package, pin to pin compatible • Same functionalities • No required hardware modification. Slightly changed electrical characteristics. Max current consumption and impedance refer to the SX872xC datasheet for more precision. New Protocol: The limited 2-WIRE communication interface on SX872xE devices do not support multiple devices on the same bus. The communication interface has been improved on SX872xC with a fast I2C interface with an external address option to ensure better compatibility. Slight Software Adaptation: The SX872xC register map is a superset of SX872xE. The two added registers enable I2C timeout and additional I2C external address. Address Register Bit Description 0x42 RegTimeout 1 Enable/Disable I2C timeout 0x43 RegExtAdd 8 Set address by external pin Register Value STOP ACK Device Address ACK ACK Register Address ACK Register Address Start ACK Device Address ACK START The new protocol requires a slight adaptation of the application software to avoid sending twice the device address on the bus on a write operation. For example, to write data in the SX87xE, the following sentence is sent. Register Value STOP Device Address ACK START The sentence on SX87xC is: Semtech, the Semtech logo are registered marks of Semtech Corporation. ©2011, Semtech Corporation. All Rights Reserved. ZADC-migrt1011 W W W.SE MTE C H .C OM -1-