ADE9103中文资料Isolated, Sigma-Delta ADCs with SPI数据手册ADI规格书

描述 Description

The ADE9103/ADE9112/ADE9113are precision simultaneouslysampling Σ-Δ analog-to-digital converters (ADCs) for both DCand polyphase shunt-based energy metering applications. TheADE9113 integrates safety certified signal and power galvanicisolation with three simultaneously sampling fully differential 24-bitΣ-Δ ADC channels. The ADE9112 features two fully differential Σ-ΔADC channels for isolated applications where only a single voltagechannel is required. The ADE9103 is a nonisolated, 3-channel Σ-ΔADC for use in applications where isolation is not required, suchas for neutral measurement. The ADE9103/ADE9112/ADE9113 allinclude a high-gain, current channel best suited for use with ashunt resistor as the current sensor. Multiple ADE9103/ADE9112/ADE9113 devices can be synchronized to sample simultaneouslyand provide coherent outputs.

The current channel ADC provides an 86 dBFS signal-to-noiseratio (SNR), at a sample rate of 4 kSPS, over a 1.65 kHz signalbandwidth and a typical gain drift of 13 ppm/°C, which enablesdown to Class 0.2 accuracy. The voltage ADCs provide an SNR of91 dBFS over the same sample rate and bandwidth. The high gainon the current channel (IP and IM) aids the use of lower resistanceshunts for reduced losses due to heat. The low offset drift of 2nV/°C offers the performance required for DC metering.

The ADE9103/ADE9112/ADE9113 delivers system cost savingsand increased robustness. The main ADE9103/ADE9112/ADE9113can drive clocks of up to three additional ADE9103/ADE9112/ADE9113 with a single crystal. The bidirectional, serial port interface(SPI) supports a daisy-chain capability, allowing access toall registers while reducing the required microcontroller pin count.The 28-lead SOIC_W_FP allows more compact layouts. Valid datatransfers are ensured with bidirectional, cyclic redundancy check(CRC) and IRQ pin alerts the system of critical faults. The ADE9112and ADE9113 pass CISPR 32 Class B emissions on a 2-layerprinted circuit board (PCB) with the addition of a high voltagecapacitor and on a 4-layer PCB with an internal stitching capacitor.

APPLICATIONS

Shunt-based polyphase meters Electric vehicle supply equipment DC meters Power quality monitoring Solar inverters Process monitoring Protective devices Isolated sensor interfaces

特性 Features

• 2 (ADE9112) or 3 (ADE9113) channel isolated, simultaneouslysampling Σ-Δ ADCs, with integrated isoPower, isolated dc-to-dc converters
• 3 (ADE9103) channel nonisolated, simultaneously sampling Σ-Δ ADCs•Synchronization of multiple ADE9103/ADE9112/ADE9113 devices
• 4-wire SPI with bidirectional CRC and daisy-chain functionality•Unique SPI readable part ID registers•Up to 4 ADE9103/ADE9112/ADE9113 devices clocked from a single crystal or an external clock
• IRQ hardware pin and registers for fault detection and robustness•Sample rate up to 32 kSPS•SNR up to 95 dB•±31.25 mV peak analog input voltage range for current channel
• ±500 mV peak single-ended analog input voltage range for voltage channels