ADUC7122 Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI® MCU

The ADuC7122 is a fully integrated, 1 MSPS, 12-bit data acquisition system, incorporating high performance multichannel ADCs, 12 voltage output DACs, 16-bit/32-bit MCUs, and Flash/EE memory on a single chip. The ADC consists of up to 13 inputs. Four of these inputs can be configured as differential pairs with a Programmable Gain Amplifier on their front end providing a gain between 1 and 5. The ADC can operate in single-ended or differential input modes. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and supply voltage monitor complete the ADC peripheral set. Applications

The DAC output range is programmable to one of two voltage ranges. The DAC outputs have an enhanced feature of being able to retain their output voltage during a watchdog or software reset sequence.

The devices operate from an on-chip oscillator and a PLL, generating an internal high frequency clock of 41.78 MHz. 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 RISC machine that offers up to 41 MIPS peak performance. Eight kilobytes of SRAM and 126 kilobytes of nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI core views all memory and registers as a single linear array.

The ADuC7122 contains an advanced interrupt controller. The vectored interrupt controller (VIC) allows every interrupt to be assigned a priority level. It also supports nested interrupts to a maximum level of eight per IRQ and FIQ. When IRQ and FIQ interrupt sources are combined, a total of 16 nested interrupt levels are supported.

On-chip factory firmware supports in-circuit download via the I2C serial interface port, while nonintrusive emulation is also supported via the JTAG interface. These features are incorporated into a low cost QuickStart™ Development System supporting this MicroConverter® family. The part contains a 16-bit PWM with six output signals.

For communication purposes, the part contains 2 × I2C channels that can be individually configured for master or slave mode. An SPI¯ interface supporting both master and slave modes is also provided.

The parts operate from 3.0 V to 3.6 V and are specified over atemperature range of −10°C to +95°C. The ADuC7122 is available in a 108-Ball BGA package.

Features and Benefits

13 external channel, 12-bit, 1 MSPS ADC
2 channels with programmable gain
PGA (1 to 5) input range
IOVDD power monitor channel
On-chip temperature monitor
11 general-purpose inputs
Fully differential and single-ended modes
0 V to VREF analog input range
12 × 12-bit voltage output DACs
On-chip voltage reference: 1.2 V/2.5 V
Buffered output reference sources for use with external circuits
ARM7TDMI core, 16-bit/32-bit RISC architecture
JTAG port supports code download and debug
Trimmed on-chip oscillator (±3%)
External watch crystal
External clock source up to 41.78 MHz
41.78 MHz PLL with programmable divider
126 kB Flash/EE memory, 8 kB SRAM
In-circuit download, JTAG-based debug
Software-triggered in-circuit reprogrammability

UART, 2 × I2C and SPI serial I/O
32-pin GPIO port
4× general-purpose timers
Wake-up and watchdog timers (WDT)
Power supply monitor
8 Priority levels for each interrupt type
Interrupt on edge or level external pin inputs
Specified for 3 V operation
Active mode: 11 mA at 5 MHz, 40 mA at 41.78 MHz
7 mm × 7mm 108-ball BGA
Fully specified for −10°C to +95°C operation
Low cost QuickStart™ development system
Full third-party support

Processors & DSP

ARM7 Core Products

Data Sheets

Document	note
ADuC7122: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU Data Sheet (Rev. A) ADuC7122: Silicon Anomaly Data Sheet (Rev A 08/2014)	PDF 1575 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADUC7122BBCZ Production	108 ball CSPBGA (7x7x1.4mm)	OTH 416	-10 to 95C	9.9	8.7	Y
ADUC7122BBCZ-RL Production	108 ball CSPBGA (7x7x1.4mm)	REEL 2000	-10 to 95C	0	8.7	Y