Keyence GL-T11R ZMDI公司的ZSSC1856是集成了嵌入式MCU的雙路高精度18位Sigma-Delta ADC，其中的一路輸入通過外接電阻測量電池電流IBAT（失調(diào)誤差小于10mA，分辨率減小1mA），另一路測量電池電壓VBAT（輸入范圍4-28.8V，精度+/- 2mV）和溫度，而集成的閃存則用于計(jì)算電池的狀態(tài)。可編增益4-512，采樣頻率1Hz至16kHz，主要用于汽車，工業(yè)和醫(yī)療領(lǐng)域。此處介紹了ZSSC1856主要特性和優(yōu)勢，示意圖，基本應(yīng)用電路和典型應(yīng)用電路。
ZSSC1856是具有嵌入式微控制器的雙通道ADC，用于汽車，工業(yè)和醫(yī)療系統(tǒng)中的電池感測/管理。
兩個(gè)輸入通道之一通過外部分流電阻上的壓降測量電池電流IBAT。通道測量電池電壓VBAT和溫度。為客戶特定的軟件提供了集成的閃存。例如，用于計(jì)算電池狀態(tài)的專用算法。
在“睡眠模式”（例如，發(fā)動機(jī)關(guān)閉）期間，系統(tǒng)會進(jìn)行定期測量以監(jiān)視電池的放電情況。測量周期由軟件控制，并包括各種喚醒條件。ZSSC1856針對超低功耗進(jìn)行了優(yōu)化，在這種模式下僅消耗100μA或更少的電流。
ZSSC1856在一個(gè)封裝中包含兩個(gè)硅芯片。裸片以堆疊裸片的形式組裝在PQFN32 5x5mm封裝中。系統(tǒng)基礎(chǔ)芯片（SBC）包含高壓電路，包括外圍模塊的模擬輸入級，ΣΔ-ADC，數(shù)字濾波和LIN收發(fā)器。微控制器芯片（MCU）包含微控制器內(nèi)核，存儲器和一些外圍模塊。MCU和SBC之間的通信由SPI接口處理。連接MCU和SBC的內(nèi)部節(jié)點(diǎn)（即TXD，RXD，IRQN，CSN，SPI_CLK，MOSI，MISO，MCU_CLK，MCU_RSTN和RAM_PROTN）由固件控制。用戶可以通過LIN接口和/或外部JTAG引腳（即TDO，TDI，TRSTN，TMS和TCK）訪問內(nèi)部節(jié)點(diǎn)。
ZSSC1856主要特性：
?帶有片內(nèi)基準(zhǔn)電壓（5ppm / K）的高精度18位sigma-delta ADC?
電流通道
??IBAT失調(diào)誤差：
≤10mA??IBAT分辨率：
≤1mA?可編程增益：4至
512??差分輸入級輸入范圍：±
300mV??采樣率：1Hz至 16kHz?
電壓通道 ?
輸入范圍：4到28.8V?
電壓精度：± 2mV?
溫度通道
?內(nèi)部溫度傳感器：±2℃
?外部溫度傳感器（NTC ）
?片上精密振蕩器（1％）
?片上的低功率振蕩器
? ARM ®皮質(zhì)?-M0 *微控制器：32位內(nèi)核，10MHz的20MHz的
?帶有ECC，8kB SRAM的96kB Flash / EE存儲器
?LIN2.1 / SAE J2602-1收發(fā)器
?直接連接至12V電池電源
?電流消耗
??正常模式：10mA至
20mA?低功耗模式：
≤100μAZSSC1856優(yōu)勢：
?集成的精密測量解決方案，可準(zhǔn)確預(yù)測電池的健康狀態(tài)（SOH），充電狀態(tài)（SOC）或功能狀態(tài)（SOF）
?靈活的喚醒模式可在不犧牲性能的情況下實(shí)現(xiàn)功耗
?無溫度校準(zhǔn)或要求外部微調(diào)組件
?通過小型指令集體系結(jié)構(gòu)優(yōu)化代碼密度Thumb®-2*
?適用于惡劣汽車環(huán)境的強(qiáng)大POR概念
?業(yè)界最小占板面積允許最小的模塊尺寸和成本
?AEC-Q100認(rèn)證的解決方案
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