General Description
The MAXQ7670 is a highly integrated solution for mea-
suring multiple analog signals and outputting the results
on a control area network (CAN) bus. The device oper-
ates 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 sup-
ply 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 detec-
tion and power-on reset (POR) functions. The 16-bit RISC
microcontroller (µC) includes 64KB (32K x 16) of non-
volatile 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 program-
ming and debugging, an integrated 15MHz RC oscilla-
tor, 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 prod-
ucts 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.
Applications
Automotive Steering Angle and Torque Sensors
CAN-Based Automotive Sensor Applications
Industrial Control
Building Automation
Features
o High-Performance, Low-Power, 16-Bit RISC Core
0.166MHz to 16MHz Operation, Approaching
1MIPs/MHz
Low Power (< 1mA/MIPS, V
DVDD
= +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
o Program and Data Memory
64KB Internal Nonvolatile Program/Data Flash
2KB Internal Data RAM
o 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)
o 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
o Oscillator/Clock Module
Internal Oscillator Supports External Crystal
(8MHz or 16MHz)
Integrated 15MHz RC Oscillator
External Clock Source Operation
Programmable Watchdog Timer
o Power-Management Module
Power-On Reset
Power-Supply Supervisor/Brownout Detection
Integrated +2.5V and +3.3V Linear Regulators
MAXQ7670
Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface
________________________________________________________________
Maxim Integrated Products
1
19-4384; Rev 1; 7/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Typical Application Circuit and Pin Configuration appear at
end of data sheet.
SPI is a trademark of Motorola, Inc.
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information
