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

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

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

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

PART

TEMP RANGE

PIN-PACKAGE

MAXQ7670ATL/V+

-40°C to +125°C

40 TQFN-EP*

/V denotes an automotive qualified part.

+

Denotes a lead-free/RoHS-compliant package.

*

EP = Exposed pad.

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