Rainbow Electronics MAXQ7670 User Manual

General Description

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 high­performance, 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.

Applications

Automotive Steering Angle and Torque Sensors

CAN-Based Automotive Sensor Applications

Industrial Control

Building Automation

Features

♦ 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 Auto­Increment/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)
Integrated 15MHz RC Oscillator
External Clock Source Operation
Programmable Watchdog Timer

♦ 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 0; 11/08

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+

40 TQFN-EP*

+

Denotes a lead-free/RoHS-compliant package.

*

EP = Exposed pad.

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of
any device may be simultaneously available through various sales channels. For information about device errata, go to:

http://www.maxim-ic.com/errata

.

-40°C to +125°C

MAXQ7670

Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

DVDD to DGND ........................................................-0.3V to +3V

DVDDIO to GNDIO ................................................-0.3V to +5.5V

AVDD to AGND ........................................................-0.3V to +4V

DGND to GNDIO. ..................................................-0.3V to +0.3V

GNDIO to AGND. ..................................................-0.3V to +0.3V

AGND to DGND.....................................................-0.3V to +0.3V

Analog Inputs to AGND..........................-0.3V to (V

AVDD

+ 0.3V)

RESET, Digital Inputs/Outputs to

GNDIO ............................................-0.3V to (V

DVDDIO

+ 0.3V)

XIN, XOUT to DGND ..............................-0.3V to (V

DVDD

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

40-Pin TQFN (derate 36mW/°C above +70°C) ..........2857mW

Continuous Current into Any Pin.......................................±50mA

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER REQUIREMENTS

Supply Voltage Ranges

AVDD Supply Current I

Analog Module Incremental
Subfunction Supply Current

DVDD Supply Current I

Digital Peripheral Incremental
Subfunction Supply Current

DVDDIO Supply Current I

DVDD

AVDD LRAPD = 1, AVDD ≤ DV

DVDDIO 4.5 5.0 5.25

AVDD

∆I

AVDD

DVDD

∆I

DVDD

DVDDIO

REGEN2 = DVDDIO, DV

≤ DV

DV

DD

Shutdown (Note 2) 3 10 µA

All analog functions enabled 6 7 mA

ADC, 50ksps, 4MHz ADCCLK 5200

ADC, 250ksps, 4MHz ADCCLK 5600

AVDD brownout interrupt monitor 3

PGA enabled 5500

CPU in stop mode, all peripherals
disabled

High speed/2MHz mode (Note 3) 2.0 2.5

High speed/16MHz mode (Note 4) 11.3

Low speed/625kHz mode (Note 5) 0.95

Program flash erase or write 14 23

DVDDIO brownout reset monitor 1

HF crystal oscillator 60

Internal fixed-frequency oscillator 50

All digital I/Os static at GNDIO or
DV

DDIO

CAN transmitting, timer output
switching (Note 6)

≤ AVDD,

DD

DDIO

DDIO

2.25 2.5 2.75

3.0 3.3 3.6

25 200 µA

220µA

0.2 0.3 mA

V

µA

mA

µA

MAXQ7670

Microcontroller with 10-Bit ADC,

PGA, 64KB Flash, and CAN Interface

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MEMORY SECTION

Flash Memory Size Program or data storage 64 KB

Flash Page Size 16-bit word size 256 Words

Flash Erase/Write Endurance Program or data (Note 7) 10,000 Cycles

Flash Data Retention (Note 7)

Flash Erase Time

Flash Programming Time

RAM Memory Size 2KB

Utility ROM Size 16-bit word size 4 KWords

ANALOG SENSE PATH (Includes PGA and ADC)

Resolution N

Integral Nonlinearity INL

Differential Nonlinearity DNL

Input-Referred Offset Error

Offset-Error Temperature
Coefficient

ADC

ADC

ADC

All flash, TA = +25°C 100

All flash, T

Flash page erase 20 50

Entire flash mass erase 200 500

Flash single word programming 20 40 µs

Entire flash programming 0.66 1.31 s

No missing codes 10 Bits

PGA gain = 16V/V, bipolar mode,

= ±100mV, 150.9ksps

V

IN

PGA gain = 1V/V, unipolar mode,
V

= +1.0V, 250ksps

IN

PGA gain = 1V/V or 16V/V ±0.4 ±1 LSB

Test at T
PGA gain = 1V/V or 16V/V

PGA gain = 16V/V, bipolar mode ±2 µV/°C

= +85°C 15

A

= +25°C,

A

±0.5 ±1

±0.4 ±1

±1 ±10 mV

Years

LSB

ms

10

10

Gain Error

Gain-Error Temperature
Coefficient

Conversion Clock Frequency f

Sample Rate f

Channel Select, Track-and­Hold Acquisition Time

Conversion Time t

PGA gain = 16V/V, bipolar mode,
excludes offset and reference error,
test at T

PGA gain = 16V/V, bipolar mode ±5 ppm/°C

ADCCLKfSYSCLK

SAMPLE

t

ACQ

CONV

PGA gain = 16V/V, f

PGA gain = 1V/V, f

PGA gain = 16V/V,

13.5 ADCCLK cycles at 4MHz

PGA gain = 1V/V,
three ADCCLK cycles at 4MHz

13 ADCCLK cycles at 4MHz 3.25 µs

-2 +2 %

= +25°C

A

= 8MHz or 16MHz 0.5 4.0 MHz

ADCCLK

ADCCLK

= 4MHz 150.9

= 4MHz 250

3.375

0.75

ksps

µs

MAXQ7670

Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Channel Select Plus
Conversion Time

Turn-On Time t

Aperture Delay 60 ns

Aperture Jitter 100 ps

Differential Input Voltage
Range

Absolute Input Voltage Range At AIN0–AIN7 0 V

Input Leakage Current At AIN0–AIN7 ±0.1 µA

Input-Referred Noise

Small-Signal Bandwidth (-3dB)

Large-Signal Bandwidth (-3dB)

Input Capacitance (Note 8)

Input Common-Mode Rejection
Ratio

Power-Supply Rejection Ratio PSRR AV

EXTERNAL REFERENCE INPUTS

REFADC Input Voltage Range 1.0 3.3 V

REFADC Leakage Current ADC disabled 1 µA

Input Capacitance (Note 9) 20 pF

+3.3V (AVDD) LINEAR REGULATOR

AVDD Output Voltage LRAPD = 0 3.15 3.3 3.45 V

No-Load Quiescent Current

t

ACQ

t

CONV

RECOV

CMRR

+

PGA gain = 16V/V,

26.5 ADCCLK cycles at 4MHz

PGA gain = 1V/V,
16 ADCCLK cycles at 4MHz

At AIN0–AIN7, unipolar mode,
PGA gain = 1V/V

At AIN0–AIN7, unipolar mode,
PGA gain = 16V/V

At AIN0–AIN7, bipolar mode,
PGA gain = 1V/V

At AIN0–AIN7, bipolar mode,
PGA gain = 16V/V

At AIN0–AIN7, PGA gain = 16V/V 50

At AIN0–AIN7, PGA gain = 1V/V 400

VIN = 12mV

= 200mV

V

IN

VIN = 150mV

= 2.5V

V

IN

Single-ended, any AIN0–AIN7,
PGA gain = 16V/V

Single-ended, any AIN0–AIN7,
PGA gain = 1V/V

AIN0–AIN7,
V

= differential input range

CM

= 3.0V to 3.6V 90 dB

DD

LRAPD = 0, all internal analog
peripherals disabled

0V

0 0.125

-V

REFADC

/2

-V

REFADC

/32

, PGA gain = 16V/V 33

P-P

, PGA gain = 1V/V 23

P-P

, PGA gain =16V/V 33

P-P

, PGA gain = 1V/V 19

P-P

6.625

4

10 µs

16

13

75 dB

10 µA

REFADC

+V

REFADC

+V

REFADC

/32

AVDD

AVDD

µs

P-P

V

/2

V

µV

RMS

MHz

MHz

pF

V

MAXQ7670

Microcontroller with 10-Bit ADC,

PGA, 64KB Flash, and CAN Interface

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Current Capability LRAPD = 0 50 mA

Output Short-Circuit Current LRAPD = 0, AVDD shorted to AGND 100 mA

Maximum AVDD Bypass
Capacitor to AGND

+2.5V (DVDD) LINEAR REGULATOR

DVDD Output Voltage REGEN2 = GNDIO 2.38 2.5 2.62 V

No-Load Quiescent Current

Output Current Capability REGEN2 = GNDIO 50 mA

Output Short-Circuit Current

Maximum DVDD Bypass
Capacitor to DGND

SUPPLY-VOLTAGE SUPERVISORS AND BROWNOUT DETECTION

DVDD Reset Threshold

DVDD Interrupt Threshold

Minimum DVDD Interrupt and
Reset Threshold Difference

AVDD Interrupt Threshold

DVDDIO Interrupt Threshold

Operational Range

Supervisor Hysteresis ±0.7 %

CAN INTERFACE

CAN Baud Rate f

CANCLK Mean Frequency
Error

LRAPD = 0 0.47 µF

REGEN2 = GNDIO, all internal digital
peripherals disabled

REGEN2 = GNDIO, DV
DGND

REGEN2 = GNDIO 0.47 µF

Asserts RESET if V
threshold

Generates an interrupt if V
below this threshold

Generates an interrupt if V
below this threshold

Generates an interrupt if V
falls below this threshold

DV

DD

AV

DD

DV

DDIO

CANCLK

8MHz or 16MHz, 50ppm external
crystal

shorted to

DD

is below this

DVDD

falls

DVDD

falls

AVDD

DVDDIO

= 8MHz 1 Mbps

2.1 2.25 V

2.25 2.38 V

3.0 3.15 V

4.5 4.75 V

1 2.75

1 3.6

1 5.25

15 µA

100 mA

0.14 V

60 ppm

V

CANCLK Total Frequency Error

8MHz or 16MHz, 50ppm external
crystal; measured over a 12ms
interval; mean plus peak cycle jitter

< 0.5 %

MAXQ7670

Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

HIGH-FREQUENCY CRYSTAL OSCILLATOR

Clock Frequency

Stability Excluding crystal drift 25 ppm

Startup Time f

XIN Input Low Voltage Driven with external clock source

XIN Input High Voltage Driven with external clock source

INTERNAL FIXED-FREQUENCY OSCILLATOR

Frequency f

Tolerance TA = +25°C ±0.4 %

Temperature Drift TA = T

Power-Supply Rejection TA = +25°C, DV

RESET (RESET)

RESET Internal Pullup
Resistance

RESET Output Low Voltage RESET asserted, no external load 0.4 V

RESET Output High Voltage RESET deasserted, no external load

RESET Input Low Voltage Driven with external clock source

RESET Input High Voltage Driven with external clock source

DIGITAL INPUTS (P0._, CANRXD, MISO, MOSI, SS, SCLK, TCK, TDI, TMS)

Input Low Voltage 0.8 V

Input High Voltage 2.1 V

Input Hysteresis 500 mV

Input Leakage Current

Input Pullup Resistance 55 kΩ

Input Pulldown Resistance 55 kΩ

Input Capacitance 15 pF

DIGITAL OUTPUTS (P0._, CANTXD, MOSI, SCLK, SS, TDO)

Output Low Voltage I

Output High Voltage I

IFFCLKTA

Using external crystal 8 or 16 16

External input (Note 10) 0.166 16.67

SYSCLK

= T

MIN

MIN

Pulled up to DVDDIO 55 kΩ

V

= GNDIO or V

IN

pullup disabled

= 0.5mA 0.4 V

SINK

SOURCE

cycles 65,535 Cycles

0.7 x

V

DVDD

to T

MAX

to T

MAX

= 0.5mA

= 2.25V to 2.75V ±1.5 %

DD

,

DVDDIO

13.8 15 16.35 MHz

0.9 x

V

DVDDIO

0.7 x

V

DVDDIO

-10 ±0.01 +10 µA

V

DVDDIO

- 0.5

5%

0.3 x

V

DVDD

0.3 x

V

DVDD

MHz

V

V

V

V

V

V

MAXQ7670

Microcontroller with 10-Bit ADC,

PGA, 64KB Flash, and CAN Interface

_______________________________________________________________________________________ 7

ELECTRICAL CHARACTERISTICS (continued)

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Capacitance I/O pins three-state 15 pF

Maximum Output Impedance

PD0._ = 0 880

PD0._ = 1 450

SYSTEM CLOCK

System Clock Frequency f

SYSCLK

From any clock source 0 16.67 MHz

SPI INTERFACE TIMING

SPI Master Operating
Frequency

SPI Slave Mode Operating
Frequency

SCLK Output Pulse-Width
High/Low

SCLK Input Pulse-Width
High/Low

t

SCH

MOSI Output Hold Time
After SCLK Sample Edge

MOSI Output Setup Time to
SCLK Sample Edge

MISO Input Setup Time to
SCLK Sample Edge

MISO Input Hold Time After
SCLK Sample Edge

SCLK Inactive to MOSI
Inactive

MOSI Input Setup Time to
SCLK Sample Edge

MOSI Input Hold Time After
SCLK Sample Edge

MISO Output Valid After
SCLK Shift Edge Transition

MISO Output Disabled After

SS Edge Rise

SS Falling Edge to MISO Active t

f

MCLK

f

SCLK

t

MCH

t

MCL

t

MOH

t

MOS

t

MIS

t

MIH

t

MLH

t

SIS

t

SIH

t

SOV

t

SLH

SOE

0.5 x f

SYSCLK

,

t

SYSCLK

8 MHz

f

/8 MHz

SYSCLK

- 25

, t

SCL

t

SYSCLK

t

SYSCLK

- 25

t

SYSCLK

- 25

30 ns

0ns

t

SYSCLK

- 25

30 ns

t

SYSCLK

+ 25

3 t

SYSCLK

+ 25

2 t

SYSCLK

+ 50

2 t

SYSCLK

+ 2.5

Ω

ns

ns

ns

ns

ns

ns

ns

ns

ns

MAXQ7670

Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface

8 _______________________________________________________________________________________

Note 1: All devices are 100% production tested at TA= +25°C and +125°C. Temperature limits to TA= -40°C are guaranteed by

design.

Note 2: All analog functions disabled and all digital inputs connected to supply or ground.
Note 3: High-speed/8 mode without CAN; V

DVDD

= +2.5V, CPU and 16-bit timer running at 2MHz from an external, 16MHz crystal

oscillator; all other peripherals disabled; all digital I/Os static at V

DVDDIO

or GNDIO; TA= T

MIN

to T

MAX

.

Note 4: High-speed/1 mode with CAN; V

DVDD

= +2.5V, CPU and 16-bit timer running at 16MHz from an external, 16MHz crystal
oscillator; CAN enabled and communicating at 500kbps; all other peripherals disabled, all digital I/Os (except CANTXD
and CANRXD) static at V

DVDDIO

or GNDIO, TA= T

MIN

to T

MAX

.

Note 5: Low speed, PMM1 mode without CAN; V

DVDD

= +2.5V, CPU and one timer running from an external, 16MHz crystal oscilla-

tor in PMM1 mode; all other peripherals disabled; all digital I/Os static at V

DVDDIO

or GNDIO, TA= T

MIN

to T

MAX

.

Note 6: CAN transmitting at 500kbps; 16-bit timer output switching at 500kHz; all active I/Os are loaded with a 20pF capacitor; all

remaining digital I/Os are static at V

DVDDIO

or GNDIO, TA= T

MIN

to T

MAX

.

Note 7: Guaranteed by design and characterization.
Note 8: This is not a static capacitance. It is the capacitance presented to the analog input when the T/H amplifier is in sample mode.
Note 9: The switched capacitor on the REFADC input can disturb the reference voltage. To reduce this disturbance, place a 0.1µF

capacitor from REFADC to AGND as close as possible to REFADC.

Note 10: The digital design is fully static. However, the lower clock limit is set by a clock detect circuit. The MAXQ7670 switches to

the internal RC clock if the external input goes below 166kHz. This clock detect circuit also acts to detect a crystal failure
when a crystal is used.

ELECTRICAL CHARACTERISTICS (continued)

(V

DVDDIO

= +5.0V, V

AVDD

= +3.3V, V

DVDD

= +2.5V, V

REFADC

= +3.3V, system clock = 16MHz. TA= T

MIN

to T

MAX

, unless otherwise

noted. Typical values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SS Falling Edge to First SCLK
Sample Edge

SCLK Inactive to SS Rising
Edge

Minimum CS Pulse Width t

t

SSE

t

SD

SCW

2 t

SYSCLK

+ 5

t

SYSCLK

+ 10

t

SYSCLK

+ 10

ns

ns

ns

MAXQ7670

Microcontroller with 10-Bit ADC,

PGA, 64KB Flash, and CAN Interface

_______________________________________________________________________________________ 9

(CKPOL/CKPHA =

Figure 1. SPI Timing Diagram in Master Mode

Figure 2. SPI Timing Diagram in Slave Mode

SCLK

0/1 OR 1/0 MODE)

SCLK

(CKPOL/CKPHA =

0/0 OR 1/1 MODE)

MISO

MOSI

SAMPLE EDGE

SHIFT EDGE

t

t

t

MCH

MCL

t

t

MCL

MCH

t

MIH

t

MIS

MCLK

t

MOS

t

MOH

t

MLH

HIGH IMPEDANCE

t

SCW

SS

SCLK

(CKPOL/CKPHA =

0/1 OR 1/0 MODE)

SCLK

(CKPOL/CKPHA =

0/0 OR 1/1 MODE)

MOSI

MISO

t

SOE

HIGH

IMPEDANCE

SAMPLE EDGE

SHIFT EDGE

t

t

SCL

SSE

t

SCHtSCL

t

t

SIS

t

SCLK

t

t

SCH

SIH

t

SOV

SD

t

SLH

HIGH

IMPEDANCE

MAXQ7670

Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface

10 ______________________________________________________________________________________

Typical Operating Characteristics

(V

DVDDIO

= 5.0V, V

AVDD

= 3.3V, V

DVDD

= 2.5V, f

SYSCLK

= 16MHz, ADC resolution = 10 bits, V

REFDAC

= 3.3V, TA = +25°C, unless

otherwise noted.)

(V)

OH

V

1.0

0.8

0.6

0.4

0.2

-0.2

ADC DNL (LSB)

-0.4

-0.6

-0.8

-1.0

GPO._ OUTPUT HIGH VOLTAGE

vs. SOURCE CURRENT

5

PS0._ = 0

4

TA = -40°C

3

TA = +25°C

2

TA = +85°C

1

TA = +105°C

0

0 0.5 1.0 1.5 2.0 2.5

IOH (mA)

PS0._ = 1

TA = -40°C

TA = +25°C

TA = +85°C

TA = +105°C

ADC DNL vs. CODE

(REFADC = +3.3V, 150.9ksps,

PGA GAIN = 16V/V)

BIPOLAR MODE

= -100mV to +100mV

V

IN

0

-512 -256 0 256 512
DIGITAL OUTPUT CODE

DVDD, RESET POWER-UP

CHARACTERISTICS

10ms/div

MAXQ7670 toc07

REGEN2 = GNDIO

MAXQ7670 toc01

MAXQ7670 toc04

DVDDIO
2V/div

DVDD
1V/div

RESET
2V/div

GPO._ OUTPUT LOW VOLTAGE

vs. SINK CURRENT

5

4

3

PS0._ = 0

(V)

OL

V

TA = -40°C

2

TA = +25°C

TA = +85°C

1

TA = +105°C

0

0 0.5 1.0 1.5 2.0 2.5

TA = +105°C

TA = +85°C

TA = +25°C

TA = -40°C

IOL (mA)

ADC OFFSET ERROR vs. TEMPERATURE

2.0
BIPOLAR MODE

1.8
PGA GAIN = 16V/V

= 0

V

IN-DIFF

1.6

1.4

1.2

1.0

0.8

OFFSET ERROR (mV)

0.6

0.4

0.2

0

= +1.65V

V

IN-CM

-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)

DVDD, RESET POWER-DOWN

CHARACTERISTICS

REGEN2 = GNDIO

20ms/div

PS0._ = 1

MAXQ7670 toc08

MAXQ7670 toc02

MAXQ7670 toc05

DVDDIO
2V/div

DVDD
1V/div

RESET
2V/div

ADC INL vs. CODE

(REF ADC = +3.3V, 150.9ksps, PGA GAIN = 16V/V)

1.5
BIPOLAR MODE

= -100mV TO +100mV

V

IN

1.0

0.5

0

ADC INL (LSB)

-0.5

-1.0

-1.5

-512 -256 0 256 512
DIGITAL OUTPUT CODE

ADC GAIN ERROR vs. TEMPERATURE

1.0
BIPOLAR MODE

0.8
PGA GAIN = 16V/V

= 200mV

V

IN-DIFF

0.6

0.4

0.2

0

-0.2

GAIN ERROR (%)

-0.4

-0.6

-0.8

-1.0

= +1.65V

V

IN-CM

-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)

MAXIMUM DVDD TRANSIENT DURATION

vs. BOI THRESHOLD OVERDRIVE

200

180

160

140

120

100

80

60

40

MAXIMUM TRANSIENT DURATION (µs)

20

0

1 10 100 1000

BOI ASSERTED ABOVE THIS LINE

DVDD BOI THRESHOLD OVERDRIVE (mV)

MAXQ7670 toc03

MAXQ7670 toc06

MAXQ7670 toc09

MAXQ7670

Microcontroller with 10-Bit ADC,

PGA, 64KB Flash, and CAN Interface

______________________________________________________________________________________

11

E

Typical Operating Characteristics (continued)

(V

DVDDIO

= 5.0V, V

AVDD

= 3.3V, V

DVDD

= 2.5V, f

SYSCLK

= 16MHz, ADC resolution = 10 bits, V

REFDAC

= 3.3V, TA = +25°C, unless

otherwise noted.)

MAXIMUM DVDDIO TRANSIENT DURATION

vs. BOI THRESHOLD OVERDRIVE

200

180

160

140

120

100

80

60

40

MAXIMUM TRANSIENT DURATION (µs)

20

BOI ASSERTED ABOVE THIS LINE

0

1 10 100 1000

DVDDIO BOI THRESHOLD OVERDRIVE (mV)

AVDD LINEAR REGULATOR OUTPUT VOLTAGE

vs. TEMPERATURE

3.40
LRAPD = 0

= 10mA

I

OUT

3.35

MAXQ7670 toc10

MAXQ7670 toc13

MAXIMUM AVDD TRANSIENT DURATION

vs. BOI THRESHOLD OVERDRIVE

200

180

160

140

120

100

80

60

40

MAXIMUM TRANSIENT DURATION (µs)

20

0

1 10 100 1000

BOI ASSERTED ABOVE THIS LINE

AVDD BOI THRESHOLD OVERDRIVE (mV)

AVDD LINEAR REGULATOR OUTPUT VOLTAGE

vs. LOAD CURRENT

3.40
LRAPD = 0

3.35

MAXQ7670 toc11

AVDD (V)

MAXQ7670 toc14

AVDD LINEAR REGULATOR OUTPUT VOLTAGE

vs. DVDDIO SUPPLY VOLTAGE

4.0
LRAPD = 0

= 10mA

I

3.5

OUT

3.0

2.5

2.0

1.5

1.0

0.5

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

DVDDIO (V)

DVDD LINEAR REGULATOR OUTPUT VOLTAGE

vs. DVDDIO SUPPLY VOLTAGE

3.0
REGEN2 = DVDDIO

= 10mA

I

OUT

2.5

2.0

MAXQ7670 toc12

MAXQ7670 toc15

3.30

AVDD (V)

3.25

3.20

-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)

DVDD LINEAR REGULATOR OUTPUT VOLTAG

vs. TEMPERATURE

2.60
REGEN2 = DVDDIO

= 10mA

I

OUT

2.55

2.50

DVDD (V)

2.45

2.40

-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)

MAXQ7670 toc16

3.30

AVDD (V)

3.25

3.20
0 5 10 15 20 25 30 35 40 45 50

LOAD CURRENT (mA)

DVDD LINEAR REGULATOR OUTPUT VOLTAGE

vs. LOAD CURRENT

2.60

REGEN2 = DVDDIO

2.55

2.50

DVDD (V)

2.45

2.40
0 5 10 15 20 25 30 35 40 45 50

LOAD CURRENT (mA)

MAXQ7670 toc17

1.5

DVDD (V)

1.0

0.5

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

DVDDIO (V)

RC OSCILLATOR OUTPUT FREQUENCY

vs. TEMPERATURE

17.0

16.5

16.0

15.5

15.0

FREQUENCY (MHz)

14.5

14.0

-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)

MAXQ7670 toc18

MAXQ7670

Microcontroller with 10-Bit ADC,
PGA, 64KB Flash, and CAN Interface

12 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V

DVDDIO

= 5.0V, V

AVDD

= 3.3V, V

DVDD

= 2.5V, f

SYSCLK

= 16MHz, ADC resolution = 10 bits, V

REFDAC

= 3.3V, TA = +25°C, unless

otherwise noted.)

RC OSCILLATOR OUTPUT FREQUENCY

vs. DVDD

16.0

15.5

15.0

FREQUENCY (MHz)

14.5

14.0

2.25 2.35 2.45 2.55 2.65 2.75
DVDD (V)

20

18

16

MAXQ7670 toc19

14

12

10

8

6

DVDD SUPPLY CURRENT (mA)

4

2

0

DVDD SUPPLY CURRENT

vs. DVDD SUPPLY VOLTAGE

FLASH ERASE

EC CHARACTERISTICS

NOTE 4 IN

EC CHARACTERISTICS

NOTE 3 IN

EC CHARACTERISTICS

NOTE 5 IN

2.250 2.750
DVDD SUPPLY VOLTAGE (V)

2.6252.5002.375

MAXQ7670 toc020

DVDD SUPPLY CURRENT

vs. TEMPERATURE

20

18

16

FLASH ERASE

14

12

10

8

6

DVDD SUPPLY CURRENT (mA)

4

2

0

-40 125

NOTE 4 IN

NOTE 5 IN

EC CHARACTERISTICS

EC CHARACTERISTICS

NOTE 3 IN

EC CHARACTERISTICS

TEMPERATURE (°C)

MAXQ7670 toc21

1109565 80-10 5 20 35 50-25

DVDD SUPPLY CURRENT

vs. DVDD SUPPLY VOLTAGE

26.5

STOP MODE

26.0

25.5

25.0

24.5

DVDD SUPPLY CURRENT (µA)

24.0

23.5

2.250 2.750
DVDD SUPPLY VOLTAGE (V)

2.6252.5002.375

AVDD SUPPLY CURRENT

vs. TEMPERATURE

140

SHUTDOWN (NOTE 2)

EC CHARACTERISTICS

IN

120

100

80

60

40

AVDD SUPPLY CURRENT (nA)

20

28

STOP MODE

27

MAXQ7670 toc22

26

25

24

DVDD SUPPLY CURRENT (µA)

23

22

-40 125

6.0

ALL ANALOG FUNCTIONS ENABLED

MAXQ7670 toc25

5.9

5.8

5.7

AVDD SUPPLY CURRENT (mA)

DVDD SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

AVDD SUPPLY CURRENT

vs. AVDD SUPPLY VOLTAGE

AVDD SUPPLY CURRENT

vs. AVDD SUPPLY VOLTAGE

140

SHUTDOWN (NOTE 2)

EC CHARACTERISTICS

IN

120

MAXQ7670 toc23

100

80

60

40

AVDD SUPPLY CURRENT (nA)

20

1109580655035205-10-25

0

3.00 3.60
AVDD SUPPLY VOLTAGE (V)

3.453.303.15

MAXQ7670 toc24

AVDD SUPPLY CURRENT

vs. TEMPERATURE

6.2

ALL ANALOG FUNCTIONS ENABLED

6.0

MAXQ7670 toc26

5.8

5.6

AVDD SUPPLY CURRENT (mA)

5.4

MAXQ7670 toc27

0

-40 125
TEMPERATURE (°C)

1109565 80-10 5 20 35 50-25

5.6

3.00 3.60
AVDD SUPPLY VOLTAGE (V)

3.453.303.15

5.2

-40 125
TEMPERATURE (°C)

1109580655035205-10-25