The MAXQ7670 is a highly integrated solution for measuring multiple analog signals and outputting the results on a control area network (CAN) bus. The device operates from a single 5V supply and incorporates a high-performance, 16-bit reduced instruction set computing (RISC) core, a SAR ADC, and a CAN 2.0B controller, supporting transfer rates up to 1Mbps. The 10-bit SAR ADC includes an amplifier with programmable gains of 1V/V or 16V/V, 8 input channels, and conversion rates up to 250ksps. The eight single-ended ADC inputs can be configured as four unipolar or bipolar, fully differential inputs. For single-supply operation, the external 5V supply powers the digital I/Os and two separate integrated linear regulators that supply the 2.5V digital core and the 3.3V analog circuitry. Each supply rail has a dedicated power-supply supervisor that provides brownout detection and power-on reset (POR) functions. The 16-bit RISC microcontroller (µC) includes 64KB (32K x 16) of nonvolatile program/data flash and 2KB (1K x 16) of data RAM. Other features of the MAXQ7670 include a 4-wire SPI™ interface, a JTAG interface for in-system programming and debugging, an integrated 15MHz RC oscillator, external crystal oscillator support, a timer/counter with pulse-width modulation (PWM) capability, and seven GPIO pins with interrupt and wake-up capability.
The system-on-a-chip (SoC) MAXQ7670 is a µC-based, smart data acquisition system. As a member of the MAXQ® family of 16-bit, RISC µCs, the MAXQ7670 is ideal for low-cost, low-power, embedded-applications such as automotive, industrial controls, and building automation. The flexible, modular architecture used in the MAXQ µCs allows development of targeted products for specific applications with minimal effort.
The MAXQ7670 is available in a 40-pin, 5mm x 5mm TQFN package, and is specified to operate over the -40°C to +125°C automotive temperature range.
Key Features
Applications/Uses
High-Performance, Low-Power, 16-Bit RISC Core
0.166MHz to 16MHz Operation, Approaching 1MIPS/MHz
Low Power (< 1mA/MIPS, VDVDD = +2.5V)
16-Bit Instruction Word, 16-Bit Data Bus
33 Instructions, Most Require Only One Clock Cycle
16-Level Hardware Stack
16 x 16-Bit, General-Purpose Working Registers
Three Independent Data Pointers with Auto-Increment/Decrement
Low-Power, Divide-by-256, Power-Management Modes (PMM) and Stop Mode
Program and Data Memory
64KB Internal Nonvolatile Program/Data Flash
2KB Internal Data RAM
SAR ADC
8 Single-Ended/4 Differential Channels, 10-Bit Resolution with No Missing Codes
PGA Gain = 1V/V or 16V/V
250ksps (150.9ksps with PGA Gain = 16V/V)
Timer/Digital I/O Peripherals
CAN 2.0B Controller (15 Message Centers)
Serial Peripheral Interface (SPI)
JTAG Interface (Extensive Debug and Emulation Support)
Single 16-Bit/Dual 8-Bit Timer/PWM
Seven General-Purpose, Digital I/O Pins with External Interrupt/Wake-Up Features
Oscillator/Clock Module
Internal Oscillator Supports External Crystal (8MHz or 16MHz)
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