ADI ADUCM361BCPZ128-R7

The ADuCM360 is a fully integrated 3.9 kSPS, 24-bit data acquisition system featuring dual-core high-performance multichannel Σ-Δ ADCs, a 32-bit ARM Cortex™-M3 processor, and Flash/EE memory on a single chip. The ADuCM360 is designed to interface directly with external precision sensors in wired and battery-powered applications. The ADuCM361 integrates all the features of the ADuCM360, but with only one 24-bit Σ-Δ ADC (ADC1). The ADuCM360/ADuCM361 incorporate an on-chip 32 kHz oscillator and an internal 16 MHz high-frequency oscillator. The high-frequency oscillator is routed through a programmable clock divider, which generates the processor core clock frequency. The maximum core clock speed is 16 MHz, with no limitation based on operating voltage or temperature. The microcontroller core is a low power ARM Cortex-M3 processor — a 32-bit RISC machine with peak performance up to 20 MIPS. The Cortex-M3 processor integrates a flexible 11-channel DMA controller supporting all wired communication peripherals (SPI, UART, and I2C). Also integrated on-chip are 128 kB nonvolatile Flash/EE memory and 8 kB SRAM. The analog subsystem consists of a dual-channel ADC, each connected to a flexible input multiplexer. Both ADCs operate in fully differential and single-ended modes. Additional on-chip ADC features include dual-channel programmable excitation current sources, a diagnostic current source, and a bias voltage generator at AVDD_REG/2 (900 mV) for setting the common-mode voltage of input channels. A low-side internal ground switch allows external circuits (such as bridge circuits) to be disconnected between conversions. The ADC contains two parallel filters: a sinc3 or sinc4 filter in parallel with a sinc2 filter. The sinc3 or sinc4 filter is used for precision measurements. The sinc2 filter is used for fast measurements and step-change detection of input signals. The device integrates a low noise, low drift internal bandgap voltage reference, but can be configured to accept one or two external voltage references when used in a ratiometric measurement configuration. An option to buffer external reference voltage inputs is integrated on-chip. A single-channel buffered voltage output DAC is also integrated on-chip. The ADuCM360/ADuCM361 incorporate a range of on-chip peripherals that can be configured under microcontroller software control to suit application requirements. These peripherals include: UART, I²C, and dual-channel SPI serial I/O communication controllers; a 19-pin GPIO port; two general-purpose timers; a wake-up timer; and a system watchdog timer. A 16-bit PWM controller with 6 output channels is also provided. The ADuCM360/ADuCM361 are designed for battery-powered applications requiring low power operation. The microcontroller core can be configured for normal operating mode at 290 μA/MHz (including Flash/SRAM IpD). With both ADCs enabled (input buffers disabled), PGA gain of 4, one SPI port enabled, and all timers enabled, total system current consumption can be as low as 1 mA. The ADuCM360/ADuCM361 can be configured into numerous low power operating modes via direct programmable control, including a sleep mode (with internal wake-up timer active) consuming only 4 μA. In sleep mode, peripherals such as external interrupts or the internal wake-up timer can wake the device. This mode enables the device to operate at extremely low power while still responding to external asynchronous or periodic events. On-chip factory firmware supports serial in-circuit download via the serial wire interface (2-pin JTAG system) and UART, as well as nonintrusive emulation via the serial wire interface. These features are all integrated into a low cost QuickStart development system supporting the precision analog microcontroller family. These devices operate from an external 1.8 V to 3.6 V supply and are rated for the -40°C to +125°C industrial temperature range.

• Dual analog input/output channel, 24-bit ADC (ADuCM360)
• Single-channel, 24-bit ADC (ADuCM361)
• Programmable ADC output rate (3.5 Hz to 3.906 kHz)
• 50 Hz/60 Hz synchronous noise rejection
• 50 SPS continuous conversion mode
• 16.67 SPS single conversion mode
• Flexible input multiplexing with selectable input channels for all ADCs
• Two 24-bit multichannel ADCs (ADC0 and ADC1)
• 6 differential or 11 single-ended input channels
• 4 internal channels for monitoring DAC, temperature sensor, IOVDD/4, and AVDD/4 (ADC1 only)
• Programmable gain (1 to 128)
• RMS noise: 52 nV (at 3.53 Hz), 200 nV (at 50 Hz)
• Programmable sensor excitation current sources
• On-chip precision voltage reference
• Single 12-bit voltage output DAC for NPN mode in 4 mA to 20 mA loop applications
• ARM Cortex-M3 32-bit processor
• Serial wire download and debug
• Internal clock crystal for wake-up timer
• 16 MHz oscillator with 8 programmable prescalers
• 128 kB Flash/EE memory, 8 kB SRAM
• In-circuit debug/download via serial wire and UART
• Supply voltage range: 1.8 V to 3.6 V (maximum)
• MCU active mode core current consumption: 290 μA/MHz
• Total system current consumption of 1.0 mA with core operating at 500 kHz (both ADCs active, input buffers off, PGA gain = 4, one SPI port active, all timers active)
• Power-saving mode current consumption: 4 μA (wake-up timer active)
• On-chip peripherals: UART, I²C, and SPI serial I/O
• 16-bit PWM controller
• 19-pin multifunction GPIO port
• 2 general-purpose timers
• Wake-up timer/watchdog timer
• Multichannel DMA and interrupt controller
• 48-lead, 7 mm × 7 mm LFCSP
• Rated operating temperature range: −40°C to +125°C
• Low-cost QuickStart development system supporting third-party compiler and emulator tools
• Versatile safety features for enhanced diagnostics

• Industrial automation and process control
• Intelligent precision detection systems
• 4 mA to 20 mA loop-powered smart sensor systems
• Medical devices and patient monitoring