参数资料
型号: ADUC7036DCPZ-RL
厂商: Analog Devices Inc
文件页数: 70/132页
文件大小: 0K
描述: IC MCU 96K FLASH DUAL 48LFCSP
标准包装: 2,500
系列: MicroConverter® ADuC7xxx
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 20.48MHz
连通性: LIN,SPI,UART/USART
外围设备: PSM,温度传感器,WDT
输入/输出数: 9
程序存储器容量: 96KB(48K x 16)
程序存储器类型: 闪存
RAM 容量: 1.5K x 32
电压 - 电源 (Vcc/Vdd): 3.5 V ~ 18 V
数据转换器: A/D 2x16b
振荡器型: 内部
工作温度: -40°C ~ 115°C
封装/外壳: 48-VFQFN 裸露焊盘,CSP
包装: 带卷 (TR)
ADuC7036
Rev. C | Page 42 of 132
16-BIT, ΣANALOG-TO-DIGITAL CONVERTERS
The ADuC7036 incorporates two independent Σ-Δ analog-to-
digital converters (ADCs): the current channel ADC (I-ADC)
and the voltage/temperature channel ADC (V-/T-ADC). These
precision measurement channels integrate on-chip buffering, a
programmable gain amplifier, 16-bit, Σ-Δ modulators, and
digital filtering for precise measurement of current, voltage,
and temperature variables in 12 V automotive battery systems.
CURRENT CHANNEL ADC (I-ADC)
The I-ADC converts battery current sensed through an external
100 μΩ shunt resistor. On-chip programmable gain means that
the I-ADC can be configured to accommodate battery current
levels from ±1 A to ±1500 A.
As shown in Figure 18, the I-ADC employs a Σ-Δ conversion
technique to attain 16 bits of no missing codes performance.
The Σ-Δ modulator converts the sampled input signal into a
digital pulse train whose duty cycle contains the digital infor-
mation. A modified Sinc3, programmable, low-pass filter is
then used to decimate the modulator output data stream to give
a valid 16-bit data conversion result at programmable output
rates from 4 Hz to 8 kHz in normal mode and from 1 Hz to
2 kHz in low power mode.
The I-ADC also incorporates counter, comparator, and accu-
mulator logic. This allows the I-ADC result to generate an
interrupt after a predefined number of conversions has elapsed
or the I-ADC result exceeds a programmable threshold value.
A fast ADC overrange feature is also supported. Once enabled,
a 32-bit accumulator automatically sums the 16-bit I-ADC results.
The time to a first valid (fully settled) result on the current channel
is three ADC conversion cycles with chop mode disabled and
two ADC conversion cycles with chop mode enabled.
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