ADUC7120 Series
Precision Analog Microcontroller, 12-Bit Analog Input/Output, ARM7TDMI MCU
Manufacturer: Analog Devices
Catalog
Precision Analog Microcontroller, 12-Bit Analog Input/Output, ARM7TDMI MCU
Key Features
• Analog input/outputMultiple channel, 12-bit, 1 MSPS ADC2 differential pairs with input PGAGeneral-purpose inputs (differential or single-ended)ADuC7120: 11 channelsFully differential and single-ended modes0 V to VREFanalog input voltage range (single-ended mode)5 low noise IDACs250 mA, 200 mA, 45 mA, 80 mA, 20 mA12-bit voltage output DACsADuC7120: 12 channels4× 12-bit voltage output DACsOn-chip voltage referenceOn-chip temperature sensor
• Multiple channel, 12-bit, 1 MSPS ADC2 differential pairs with input PGAGeneral-purpose inputs (differential or single-ended)ADuC7120: 11 channels
• 2 differential pairs with input PGA
• General-purpose inputs (differential or single-ended)ADuC7120: 11 channels
• ADuC7120: 11 channels
• Fully differential and single-ended modes
• 0 V to VREFanalog input voltage range (single-ended mode)
• 5 low noise IDACs250 mA, 200 mA, 45 mA, 80 mA, 20 mA
• 250 mA, 200 mA, 45 mA, 80 mA, 20 mA
• 12-bit voltage output DACsADuC7120: 12 channels
• ADuC7120: 12 channels
• 4× 12-bit voltage output DACs
• On-chip voltage reference
• On-chip temperature sensor
• MicrocontrollerARM7TDMI core, 16-bit/32-bit RISC architectureJTAG port supports code download and debug
• ARM7TDMI core, 16-bit/32-bit RISC architecture
• JTAG port supports code download and debug
• Clocking optionsTrimmed on-chip oscillator (±3%)External watch crystalExternal clock source up to 41.78 MHz41.78 MHz PLL with programmable divider
• Trimmed on-chip oscillator (±3%)
• External watch crystal
• External clock source up to 41.78 MHz
• 41.78 MHz PLL with programmable divider
• Memory126 kB Flash/EE memory, 8 kB SRAMIn-circuit download, JTAG-based debugSoftware triggered in-circuit reprogrammability
• 126 kB Flash/EE memory, 8 kB SRAM
• In-circuit download, JTAG-based debug
• Software triggered in-circuit reprogrammability
• On-chip peripheralsUART, 2 × I2C and SPI serial I/O32-pin GPIO port4× general-purpose timersWake-up timers and WDTPower supply monitorIDAC monitorTemperature monitor
• UART, 2 × I2C and SPI serial I/O
• 32-pin GPIO port
• 4× general-purpose timers
• Wake-up timers and WDT
• Power supply monitor
• IDAC monitor
• Temperature monitor
• Vectored interrupt controller for FIQ and IRQ8 priority levels for each interrupt typeInterrupt on edge or level external pin inputs
• 8 priority levels for each interrupt type
• Interrupt on edge or level external pin inputs
• PowerSpecified for 3 V operationNormal mode: 11 mA at 5.22 MHz, 30 mA at 41.78 MHz
• Specified for 3 V operation
• Normal mode: 11 mA at 5.22 MHz, 30 mA at 41.78 MHz
• Packages and temperature range7 mm × 7 mm 108-ball CSP_BGAFully specified for –40°C to +105°C operation
• 7 mm × 7 mm 108-ball CSP_BGA
• Fully specified for –40°C to +105°C operation
• ToolsLow costQuickStartdevelopment systemFull third party support
• Low costQuickStartdevelopment system
• Full third party support
Description
AI
The ADuC7120/ADuC7121are fully integrated, 12-bit, 1 MSPS, data acquisition systems incorporating a high performance multichannel ADC, 16-bit/32-bit microcontroller unit (MCU), and Flash®/EE memory on a single chip.The analog-to-digital converter (ADC) consists of eleven single-ended inputs for the ADuC7120 (seven single-ended inputs for the ADuC7121) and two extra differential input pairs. The two differential input pairs can be routed through a programmable gain amplifier (PGA). The ADC can operate in single-ended or differential input mode. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.The ADuC7120/ADuC7121 provide five current output digital-to-analog converters (DACs). The current sources (five current DACs) feature low noise and low drift, high-side current output at an 11-bit resolution. The five current digital-to-analog converters (IDACs) are as follows: IDAC0 with 250 mA full-scale (FS) output, IDAC1 with 200 mA FS output, IDAC2 with 45 mA FS output, IDAC3 with 80 mA FS output, and IDAC4 with 20 mA FS output.The ADuC7120/ADuC7121 also contain up to 12 voltage output DACs. The DAC output range is programmable to one of three voltage ranges.The devices operate from an on-chip oscillator and a phase-locked loop (PLL) generating an internal high frequency clock of 41.78 MHz (UCLK). This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an ARM7TDMI®, 16-bit/32-bit reduced instruction set computer (RISC) machine, which offers up to 41 MIPS peak performance. 8 kB of SRAM and 126 kB of nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI core views all memory and registers as a single linear array.On-chip factory firmware supports in circuit serial download via the I2C serial interface port; nonintrusive emulation is also supported via the JTAG interface. These features are incorporated into a low costQuickStartdevelopment system supporting this MicroConverter®family.The devices operate from 3.0 V to 3.6 V, and they are specified over the −40°C to +105°C industrial temperature range. The IDACs are powered from a separate input power supply, PVDD. When operating at 41.78 MHz, the power dissipation is typically 120 mW. The ADuC7120/ADuC7121 are available in a 108-ball chip-scale package ball grid array [CSP_BGA].ApplicationsOptical modules—tunable laser
