MAX5820MEUA+ Datasheet MAX5820LEUA+, MAX5820MEUA+, MAX5820LEUA+T | P1-P3

General Description

The MAX5820 is a dual, 8-bit voltage-output, digital-to-

analog converter (DAC) with an I

C-compatible,

2-wire interface that operates at clock rates up to 400kHz.

The device operates from a single 2.7V to 5.5V supply

(115µA at V

= 3.6V). A power-down mode decreases

current consumption to less than 1µA. The MAX5820 fea-

tures three software-selectable power-down output

impedances: 100kΩ, 1kΩ, and high impedance. Other

features include internal precision rail-to-rail output

buffers and a power-on reset (POR) circuit that powers up

the DAC in the 100kΩ power-down mode.

The MAX5820 features a double-buffered I

C-compatible

serial interface that allows multiple devices to share a sin-

gle bus. All logic inputs are CMOS-logic compatible and

buffered with Schmitt triggers, allowing direct interfacing

to optocoupled and transformer-isolated interfaces. The

MAX5820 minimizes digital noise feedthrough by discon-

necting the clock (SCL) signal from the rest of the device

when an address mismatch is detected.

The MAX5820 is specified over the extended (-40°C to

+85°C) temperature range and is available in a small

8-pin µMAX

package. Refer to the MAX5822 data

sheet for the 12-bit version and to the MAX5821 data

sheet for a 10-bit version.

Applications

Digital Gain and Offset Adjustments

Programmable Voltage and Current Sources

Programmable Attenuation

VCO/Varactor Diode Control

Low-Cost Instrumentation

Battery-Operated Instrumentation

Features

♦ Ultra-Low Supply Current

115µA at V

= 3.6V

135µA at V

= 5.5V

♦ 300nA Low-Power Power-Down Mode

♦ Single 2.7V to 5.5V Supply Voltage

♦ Fast 400kHz I

C-Compatible 2-Wire

Serial Interface

♦ Schmitt-Trigger Inputs for Direct Interfacing

to Optocouplers

♦ Rail-to-Rail Output Buffer Amplifiers

♦ Three Software-Selectable Power-Down Output

Impedances

100kΩ, 1kΩ, and High Impedance

♦ Readback Mode for Bus and Data Checking

♦ Power-On Reset to Zero

♦ 8-Pin µMAX Package

MAX5820

Dual, 8-Bit, Low-Power, 2-Wire, Serial

Voltage-Output DAC

________________________________________________________________ Maxim Integrated Products 1

REF

SDASCL

OUTB

OUTAGND

ADD

μMAX

TOP VIEW

MAX5820

Pin Configuration

Ordering Information

μC

SDA

SCL

SDA

REF

SCL

OUTA

OUTB

OUTA

OUTB

MAX5820

Typical Operating Circuit

19-3538; Rev 0; 2/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP

RANGE

PIN-

PACKAGE

ADDRESS

MAX5820LEUA

-40°C to +85°C

8 µMAX

0111 00X

MAX5820MEUA

-40°C to +85°C

8 µMAX

1011 00X

µMAX is a registered trademark of Maxim Integrated Products, Inc.

MAX5820

Dual, 8-Bit, Low-Power, 2-Wire, Serial

Voltage-Output DAC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +2.7V to +5.5V, GND = 0, V

REF

= V

, R

= 5kΩ, C

= 200pF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

at V

= +5V, T

= +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.

, SCL, SDA to GND............................................-0.3V to +6V

OUT_, REF, ADD to GND..............................-0.3V to V

+ 0.3V

Maximum Current into Any Pin............................................50mA

Continuous Power Dissipation (T

= +70°C)

8-Pin µMAX (derate 4.5mW above +70°C) ...................362mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

STATIC ACCURACY (NOTE 2)

Resolution N 8 Bits

Integral Nonlinearity INL (Note 3) ±0.5 ±1 LSB

Differential Nonlinearity DNL Guaranteed monotonic (Note 2) ±0.5 LSB

Zero-Code Error ZCE Code = 00 hex, V

= 2.7V 6 40 mV

Zero-Code Error Tempco 2.3 ppm/

Gain Error GE Code = FF hex -0.8 -3 %FSR

Gain-Error Tempco 0.26 ppm/

Power-Supply Rejection Ratio PSRR Code = FF hex, V

= 4.5V to 5.5V 58.8 dB

DC Crosstalk 30 µV

REFERENCE INPUT

Reference Input Voltage Range V

REF

Reference Input Impedance 65 90 kΩ

Reference Current Power-down mode 0.3 1 µA

DAC OUTPUT

Output Voltage Range No load (Note 4) 0 V

DC Output Impedance Code = 80 hex 1.2 Ω

= 5V, V

OUT

= full scale (short to GND) 42.2

Short-Circuit Current

= 3V, V

OUT

= full scale (short to GND) 15.1

= 5V 8

Wake-Up Time

= 3V 8

µs

DAC Output Leakage Current

Power-down mode = high impedance,

= 5.5V, V

OUT

_ = V

to GND

±0.1 ±1 µA

DIGITAL INPUTS (SCL, SDA)

Input High Voltage V

0.7 x

Input Low Voltage V

0.3 x

MAX5820

Dual, 8-Bit, Low-Power, 2-Wire, Serial

Voltage-Output DAC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +2.7V to +5.5V, GND = 0, V

REF

= V

, R

= 5kΩ, C

= 200pF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

at V

= +5V, T

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Hysteresis

0.05 x

Input Leakage Current Digital inputs = 0 or V

±0.1 ±1µA

Input Capacitance 6pF

DIGITAL OUTPUT (SDA)

Output Logic-Low Voltage V

SINK

= 3mA 0.4 V

Tri-State Leakage Current I

Digital inputs = 0 or V

±0.1 ±1µA

Tri-State Output Capacitance 6pF

DYNAMIC PERFORMANCE

Voltage-Output Slew Rate SR 0.5 V/µs

Voltage-Output Settling Time

To 0.5 LSB code 40 hex to C0 hex or

C0 hex to 40 hex (Note 5)

412µs

Digital Feedthrough Code = 00 hex, digital inputs from 0 to V

0.2 nV-s

Digital-to-Analog Glitch Impulse

Major carry transition (code = 7F hex to 80

hex and 80 hex to 7F hex)

12 nV-s

DAC-to-DAC Crosstalk 2.4 nV-s

POWER SUPPLIES

Supply Voltage Range V

2.7 5.5 V

All digital inputs at 0 or V

= 3.6V 115 205

Supply Current with No Load I

All digital inputs at 0 or V

= 5.5V 135 215

µA

Power-Down Supply Current I

DDPD

All digital inputs at 0 or V

= 5.5V 0.3 1 µA

TIMING CHARACTERISTICS (FIGURE 1)

Serial Clock Frequency f

SCL

0 400 kHz

Bus Free Time Between STOP

and START Conditions

BUF

1.3 µs

START Condition Hold Time t

STA

0.6 µs

SCL Pulse-Width Low t

LOW

1.3 µs

SCL Pulse-Width High t

HIGH

0.6 µs

Repeated START Setup Time t

STA

0.6 µs

Data Hold Time t

DAT

0 0.9 µs

Data Setup Time t

DAT

100 ns

SDA and SCL Receiving

Rise Time

(Note 5) 0 300 ns

SDA and SCL Receiving

Fall Time

(Note 5) 0 300 ns

SDA Transmitting Fall Time t

(Note 5)

20 +

0.1C

250 ns

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

MAX5820MEUA+

Mfr. #:

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Manufacturer:

Maxim Integrated

Description:

Digital to Analog Converters - DAC 8-Bit 2Ch Precision DAC

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MAX5820MEUA+

MAX5820MEUA+

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