Burr Brown Corporation DAC7612UB-2K5, DAC7612UB, DAC7612U-2K5, DAC7612U Datasheet

© 1999 Burr-Brown Corporation PDS-1501A Printed in U.S.A. June, 1999

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®

DAC7612

Dual, 12-Bit Serial Input

DIGITAL-TO-ANALOG CONVERTER

DESCRIPTION

The DAC7612 is a dual, 12-bit digital-to-analog con­verter (DAC) with guaranteed 12-bit monotonicity
performance over the industrial temperature range. It
requires a single +5V supply and contains an input
shift register, latch, 2.435V reference, a dual DAC, and
high speed rail-to-rail output amplifiers. For a full­scale step, each output will settle to 1 LSB within 7µs
while only consuming 3.7mW.

The synchronous serial interface is compatible with a
wide variety of DSPs and microcontrollers. Clock
(CLK), Serial Data In (SDI), Chip Select (CS) and
Load DACs (LOADDACS) comprise the serial inter­face.

The DAC7612 is available in an 8-lead SOIC package
and is fully specified over the industrial temperature
range of –40°C to +85°C.

FEATURES

● LOW POWER: 3.7mW

● FAST SETTLING: 7µs to 1 LSB

● 1mV LSB WITH 4.095V FULL-SCALE

RANGE

● COMPLETE WITH REFERENCE

● 12-BIT LINEARITY AND MONOTONICITY

OVER INDUSTRIAL TEMP RANGE

● 3-WIRE INTERFACE: Up to 20MHz Clock

● SMALL PACKAGE: 8-Lead SOIC

APPLICATIONS

● PROCESS CONTROL

● DATA ACQUISITION SYSTEMS

● CLOSED-LOOP SERVO-CONTROL

● PC PERIPHERALS

● PORTABLE INSTRUMENTATION

DAC7612

12-Bit DAC A

DAC Register A

14-Bit Serial Shift Register

12

12

DAC Register B

Ref

12

12

LOADDACS

CS

CLK

SDI

V

DD

GND

V

OUTA

DAC7612

12-Bit DAC B

V

OUTB

2

®

DAC7612

SPECIFICATIONS

At TA = –40°C to +85°C, and VDD = +5V, unless otherwise noted.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

DAC7612U DAC7612UB

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION 12 ✻ Bits

ACCURACY

Relative Accuracy

(1)

–2 ±1/2 +2 –1 ±1/4 +1 LSB
Differential Nonlinearity Guaranteed Monotonic –1 ±1/2 +1 –1 ±1/4 +1 LSB
Zero-Scale Error Code 000

H

–1 +1 +3 ✻✻✻ LSB
Zero Scale Match Code 000

H

1/2 1/2 2 LSB

Full-Scale Voltage Code FFF

H

4.079 4.095 4.111 4.087 4.095 4.103 V

Full-Scale Match Code FFF

H

1/2 1/2 2 LSB

ANALOG OUTPUT

Output Current Code 800

H

±5 ±7 ✻✻ mA
Load Regulation R

LOAD

≥ 402Ω, Code 800

H

13 ✻✻ LSB
Capacitive Load No Oscillation 500 ✻ pF
Short-Circuit Current ±15 ✻ mA
Short-Circuit Duration GND or V

DD

Indefinite ✻

DIGITAL INPUT

Data Format Serial ✻
Data Coding Straight Binary ✻
Logic Family CMOS ✻
Logic Levels

V

IH

0.7 • V

DD

✻ V

V

IL

0.3 • V

DD

✻ V

I

IH

±10 ✻ µA

I

IL

±10 ✻ µA

DYNAMIC PERFORMANCE

Settling Time

(2)

(tS) To ±1 LSB of Final Value 7 ✻ µs
DAC Glitch 2.5 ✻ nV-s
Digital Feedthrough 0.5 ✻ nV-s

POWER SUPPLY

V

DD

+4.75 +5.0 +5.25 ✻✻✻ V

I

DD

VIH = 5V, VIL = 0V, No Load, at Code 000

H

0.75 1.5 ✻✻ mA

Power Dissipation V

IH

= 5V, VIL = 0V, No Load 3.5 7.5 ✻✻ mW

Power Supply Sensitivity ∆V

DD

= ±5% 0.0025 0.002 ✻✻%/%

TEMPERATURE RANGE

Specified Performance –40 +85 ✻✻°C

✻ Same specification as for DAC7612U.

NOTES: (1) This term is sometimes referred to as Linearity Error or Integral Nonlinearity (INL). (2) Specification does not apply to negative-going transitions where
the final output voltage will be within 3 LSBs of ground. In this region, settling time may be double the value indicated.

3

®

DAC7612

PIN CONFIGURATION

Top View SO-8

VDD to GND .......................................................................... –0.3V to 6V

Digital Inputs to GND .............................................. –0.3V to V

DD

+ 0.3V

V

OUT

to GND ........................................................... –0.3V to VDD + 0.3V

Power Dissipation ........................................................................ 325mW

Thermal Resistance,

θ

JA

........................................................... 150°C/W

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

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

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

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

NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”
may cause permanent damage to the device. Exposure to absolute maximum
conditions for extended periods may affect device reliability.

ABSOLUTE MAXIMUM RATINGS

(1)

PIN DESCRIPTIONS

PIN LABEL DESCRIPTION

1 SDI Serial Data Input. Data is clocked into the internal

serial register on the rising edge of CLK.
2 CLK Synchronous Clock for the Serial Data Input.
3 LOADDACS Loads the internal DAC registers. All DAC registers

are transparent latches and are transparent when

LOADDACS is LOW (regardless of the state of CS

or CLK).
4 CS Chip Select. Active LOW.
5V

OUTB

DAC B Output Voltage
6 GND Ground
7V

DD

Positive Power Supply
8V

OUTA

DAC A Output Voltage

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degrada­tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.

PACKAGE/ORDERING INFORMATION

MINIMUM

RELATIVE DIFFERENTIAL SPECIFICATION PACKAGE

ACCURACY NONLINEARITY TEMPERATURE DRAWING ORDERING TRANSPORT

PRODUCT (LSB) (LSB) RANGE PACKAGE NUMBER

(1)

NUMBER

(2)

MEDIA

DAC7612U ±2 ±1 –40°C to +85°C SO-8 182 DAC7612U Rails

"" " " ""DAC7612U/2K5 Tape and Reel

DAC7612UB ±1 ±1 –40°C to +85°C SO-8 182 DAC7612UB Rails

"" " " ""DAC7612UB/2K5 Tape and Reel

NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are
available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “DAC7612U/2K5” will get a single
2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.

1
2
3
4

8
7
6

5

SDI

CLK

LOADDACS

CS

V

OUTA

V

DD

GND
V

OUTB

DAC7612U

4

®

DAC7612

EQUIVALENT INPUT LOGIC

Serial Shift Register

DAC B Register

DAC A Register

DAC Switches

Data

DAC Switches

12

12

12

12

ESD protection

diodes to V

DD

and GND

LOADDACS

SDI

CS

CLK