ADuC7020/ADuC7021/ADuC7022 Precision Analog Microcontroller Small Package, 12-bit Analog I/O, ARM7TDMI® MCU Preliminary Data sheet (REV. PrC)

Precision Analog Microcontroller

Small Package, 12-bit Analog I/O, ARM7TDMI® MCU

Preliminary Technical Data

ADuC7020/ADuC7021/ADuC7022

FEATURES

Analog I/O

Multi-Channel, 12-bit, 1MSPS ADC

- 5 Channels on the ADuC7020
- 8 Channels on the ADuC7021
- 10 Channels on the ADuC7022

Differential and single-ended modes
0 to Vref Analog Input Range
Multi-Channel 12-bit Voltage Output DACs

- 4 Outputs on the ADuC7020
- 2 Outputs on the ADuC7021

On-Chip 20ppm/°C Voltage Reference
On-Chip Temperature Sensor (±3°C)
Uncommitted Voltage Comparator

Microcontroller

ARM7TDMI Core, 16/32-bit RISC architecture

JTAG Port supports code download and debug

Clocking options: - Trimmed On-Chip Oscillator (± 2%)

- External Watch crystal

- External clock source

45MHz PLL with Programmable Divider

Memory

62k Bytes Flash/EE Memory, 8k Bytes SRAM

In-Circuit Download, JTAG based Debug
Software triggered in-circuit re-programmability

On-Chip Peripherals

UART, dual I

C and SPI Serial I/O

14-Pin GPIO Port
2 X General Purpose Timers
Wake-up and Watchdog Timers
Power Supply Monitor
PLA Programmable Logic (Array)

Power

Specified for 3V operation
Active Mode: 6mW (@1MHz)

300mW (@45MHz)

Packages and Temperature Range

40 Pin LFCSP 6x6mm body package
Fully specified for 40°C to 85°C operation

Tools

Low-Cost QuickStart Development System
Full Third-Party Support

APPLICATIONS

Optical Networking Laser Power Control
Base Station Systems
Precision Instrumentation, Smart Sensors
Optical Transceivers Digital Diagnostic Monitoring

(See general description on page 10)

FUNCTIONAL BLOCK DIAGRAM

1MSPS

12-BIT ADC

MUX

TEMP

SENSOR

ADC0

CMP0
CMP1

CMP

OUT

REF

BANDGAP

REF

ADC5*

ADC9**

ARM7TDMI-BASED MCU WITH

ADDITIONAL PERIPHERALS

2kX32 SRAM

31kX16 FLASH/EEPROM

GPIO

JTAG

4 GEN. PUR-

POSE TIMERS

SERIAL I/O

UART, SPI, 2xI2C

PLA

RST

POR

OSC

& PLL

PSM

ADuC7020
ADuC7021
ADuC7022

* not on the ADuC7020
** ADuC7022 only
*** not on the ADuC7022
**** ADuC7020 only

DAC0***

12-BIT DAC

DAC3****

12-BIT DAC

DAC2****

12-BIT DAC

DAC1***

12-BIT DAC

ADC7*

ADC8**

..
.

Figure 1

Rev. PrC

Information furnis hed by Analog Devices is believed to be accurate and reliable.
However, no res pons ibility is as s umed by Analog Devices for its us e, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700

www.analog.com

Fax: 781.326.8703

ADuC7020/ADuC7021/ADuC7022

Preliminary Technical Data

Rev. PrC | Page 2 of 16

TABLE OF CONTENTS

ADuC7020/21/22--Specifications ................................................. 3

Absolute Maximum Ratings............................................................ 7

Ordering Guide............................................................................. 7

Pin function descriptions ................................................................ 8

General Description ....................................................................... 10

Overview of the ARM7TDMI core.......................................... 10

Memory organisation ................................................................ 11

Outline Dimensions ....................................................................... 16

Preliminary Technical Data

ADuC7020/ADuC7021/ADuC7022

Rev. PrC | Page 3 of 16

ADUC7020/21/22--SPECIFICATIONS

Table 1. (AV

= IOV

= 2.7 to 3.6V, V

REF

= 2.5 V Internal Reference, f

CORE

= 45MHz, All specifications T

= T

MAX

to T

MIN

, unless otherwise noted.)

Parameter

ADuC7020/21/22

Unit

Test Conditions/Comments

ADC CHANNEL SPECIFICATIONS

DC Accuracy

2, 3

SAMPLE

= 1MSPS

Resolution

Bits

Integral Nonlinearity

Integral Nonlinearity

±1.5
±0.5
±2.0

LSB max
LSB typ
LSB max

2.5V internal reference
2.5V internal reference
1.0V external reference

Differential Nonlinearity

Differential Nonlinearity

DC Code Distribution

+1/-0.9
±0.5
+1/-0.9
1

LSB max
LSB typ
LSB max
LSB typ

2.5V internal reference
2.5V internal reference
1.0V external reference
ADC input is a dc voltage

CALIBRATED ENDPOINT ERRORS

Offset Error
Offset Error Match

±5
±1

LSB max
LSB typ

Gain Error
Gain Error Match

±5
±1

LSB max
LSB typ

DYNAMIC PERFORMANCE

Fin = 10kHz Sine Wave, f

SAMPLE

= 1MSPS

Signal-to-Noise Ratio (SNR)

dB typ

Total Harmonic Distortion (THD)

-78

dB typ

Peak Harmonic or Spurious Noise
Channel-to-Channel Crosstalk

-78
-80

dB typ
dB typ

ANALOG INPUT

Input Voltage Ranges

Differential mode

±V

REF

Volts

Single-ended mode

0 to V

REF

Volts

Leakage Current

±5

µA max

Input Capacitance

pF typ

During ADC Acquisition

ON-CHIP VOLTAGE REFERENCE

Output Voltage

2.5

0.47µF from V

REF

(pin 55) to AGND

Accuracy

±10

mV max

Measured at T

= 25°C

Reference Temperature Coefficient
Power Supply Rejection Ratio

±10
80

ppm/°C typ
dB typ

Output Impedance
Internal V

REF

Power-On Time

10
1

typ

ms typ

EXTERNAL REFERENCE INPUT

Input Voltage Range

Input Impedance

0.625
AV

TBD

V min
V max
K typ

DAC CHANNEL SPECIFICATIONS

= 5k

, C

= 100pF

DC ACCURACY

Resolution

Bits

Relative Accuracy

±2

LSB typ

Differential Nonlinearity

±1

LSB max

Guaranteed Monotonic

Offset Error

±2
±5

mV max
mV max

DAC output unbuffered
DAC output buffered

Gain Error
Gain Error Mismatch

±0.5
TBD

% max
% typ

% of fullscale on DAC0

ADuC7020/ADuC7021/ADuC7022

Preliminary Technical Data

Rev. PrC | Page 4 of 16

Parameter

ADuC7020/21/22

Unit

Test Conditions/Comments

ANALOG OUTPUTS

Output Voltage Range_0
Ouput Voltage Range_1
Output Voltage Range_2

0 to DACREF
0 to 2.5V
0 to DACV

V typ
V typ

V typ

DACREF range: DACGND to DACV

Output Impedance

typ

DAC AC CHARACTERISTICS

Voltage Output Settling Time
Voltage Output Settling Time
Digital to Analog Glitch Energy

10
15
TBD

µs typ
µs typ
nV-sec typ

DAC Output buffered
DAC Output unbuffered
I LSB change at major carry

COMPARATOR

Input Offset Voltage
Input Bias Current
Input Voltage Range
Input Capacitance
Hysteresis

Response Time

±10
5
AV

-1.2

7
5
10
1
10

mV
nA typ
V max
pF typ
mV min
mv max
µs min
µs max

Hysteresis can be turned on or off via the CMPHYST
bit in the CMPCON register
Response time may be modified via the CMPRES bits
in the CMPCON register

TEMPERATURE SENSOR

Voltage Output at 25°C
Voltage TC

TBD
-2.0

mV typ
mV/°C typ

Accuracy

±3

°C typ

POWER SUPPLY MONITOR (PSM)

IOV

Trip Point Selection

2.79

Two selectable Trip Points

3.07

Power Supply Trip Point Accuracy

±2.5

% max

Of the selected nominal Trip Point Voltage

Watchdog Timer (WDT)

Timeout Period

0
TBD

ms min
ms max

Flash/EE MEMORY

Endurance

10,000

Cycles min

Data Retention

Years min

= 55°C

Digital Inputs

Input Leakage Current

Input Capacitance

±10
±1
10

µA max
µA typ
pF typ

All digital inputs including XTAL1 and XTAL2

Logic Inputs

VINL, Input Low Voltage
VINH, Input High Voltage

0.4
2.0

V max
V min

All Logic inputs including XTAL1 and XTAL2

Logic Outputs

VOH, Output High Voltage

2.4

V min

SOURCE

= 20µA

VOL, Output Low Voltage

0.4

V max

SINK

= 1.6mA

MCU CLOCK RATE

355.5
45.5

kHz min
MHz max

8 programmable core clock selections within this
range

STARTUP TIME

At Power-On
From Idle Mode
From Power-Down Mode

TBD
TBD
TBD

Core Clock = TBD MHz

Programmable Logic Array (PLA)

Propagation Delay

TBD

ns typ

From input pin to output pin

Preliminary Technical Data

ADuC7020/ADuC7021/ADuC7022

Rev. PrC | Page 5 of 16

Parameter

ADuC7020/21/22

Unit

Test Conditions/Comments

POWER REQUIREMENTS

Power Supply Voltage Range

AGND and IOV

- IOGND

2.7

V min

3.6

V max

Power Supply Current Normal Mode

3mA
5
50

mA typ
mA max
mA typ

1MHz clock
1MHz clock
45MHz clock

mA max

45MHz clock

Power Supply Current Idle Mode

Power Supply Current Power Down
Mode

1

30
100

mA max

µA typ
µA max

External Crystal or Internal Osc ON
External Crystal or Internal Osc ON

Temperature Range -40° to +85°C

All ADC Channel Specifications are guaranteed during normal MicroConverter core operation.

These specification apply to all ADC input channels.

These numbers are not production tested but are supported by design and/or characterization data on production release.

Based on external ADC system components, the user may need to execute a system calibration to remove external endpoint and achieve these specifications..

SNR calculation includes distortion and noise components.

Channel-to-channel crosstalk is measured on adjacent channels.

The input signal can be centered on any dc common-mode voltage (V

) as long as this value is within the ADC voltage input range specified.

When using an external reference input pin, the internal reference must be disabled by setting the lsb in the REFCON Memeory Mapped Register to 0.

Endurance is qualified to 50,000 cycles as per JEDEC Std. 22 method A117 and measured at -40°C, +25°C and +85°C. Typical endurance at 25°C is 70,000 cycles.

Retention lifetime equivalent at junction temperature (Tj) = 55°C as per JEDEC Std. 22 method A117. Retention lifetime will derate with junction temperature.

Power supply current consumption is measured in normal, idle and power-down modes under the following conditions:

Normal Mode:

TBD

Idle Mode:

TBD

Power-Down:

TBD

power supply current increases typically by TBD mA during a Flash/EE memory program or erase cycle.

Part Number ADUC7021

Document Outline