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_______________General Description

The MAX517/MAX518/MAX519 are 8-bit voltage output

digital-to-analog converters (DACs) with a simple 2-wire

serial interface that allows communication between

multiple devices. They operate from a single 5V supply

and their internal precision buffers allow the DAC out-

puts to swing rail-to-rail.

The MAX517 is a single DAC and the MAX518/MAX519

are dual DACs. The MAX518 uses the supply voltage

as the reference for both DACs. The MAX517 has a ref-

erence input for its single DAC and each of the

MAX519’s two DACs has its own reference input.

The MAX517/MAX518/MAX519 feature a serial interface

and internal software protocol, allowing communication

at data rates up to 400kbps. The interface, combined

with the double-buffered input configuration, allows the

DAC registers of the dual devices to be updated indi-

vidually or simultaneously. In addition, the devices can

be put into a low-power shutdown mode that reduces

supply current to 4µA. Power-on reset ensures the DAC

outputs are at 0V when power is initially applied.

The MAX517/MAX518 are available in space-saving 8-

pin DIP and SO packages. The MAX519 comes in 16-

pin DIP and SO packages.

________________________Applications

Minimum Component Analog Systems

Digital Offset/Gain Adjustment

Industrial Process Control

Automatic Test Equipment

Programmable Attenuators

____________________________Features

♦ Single +5V Supply

♦ Simple 2-Wire Serial Interface

♦ I

C Compatible

♦ Output Buffer Amplifiers Swing Rail-to-Rail

♦ Space-Saving 8-pin DIP/SO Packages

(MAX517/MAX518)

♦ Reference Input Range Includes Both Supply Rails

(MAX517/MAX519)

♦ Power-On Reset Clears All Latches

♦ 4µA Power-Down Mode

______________Ordering Information

MAX517/MAX518/MAX519

2-Wire Serial 8-Bit DACs with

Rail-to-Rail Outputs

________________________________________________________________ Maxim Integrated Products 1

OUT1 (REF0)

AD0

AD1

SDA

SCL

GND

OUT0

MAX517

MAX518

DIP/SO

TOP VIEW

_________________Pin Configurations

INPUT

LATCH 0

OUTPUT

LATCH 0

START/STOP

DETECTOR

DAC0

INPUT

LATCH 1

8-BIT

SHIFT

OUT0

REF

OUT1

MAX518

DECODE

ADDRESS

COMPARATOR

DAC1

OUTPUT

LATCH 1

SCL

SDA

AD0 AD1

GND

________________Functional Diagram

19-0393; Rev 1; 9/02

PART

MAX517ACPA

MAX517BCPA

MAX517ACSA 0°C to +70°C

0°C to +70°C

TEMP RANGE PIN-PACKAGE

8 Plastic DIP

8 SO

TUE

(LSB)

1.5

MAX517BCSA

MAX517BC/D 0°C to +70°C

0°C to +70°C 8 SO

Dice*

1.5

Ordering Information continued at end of data sheet.

*Dice are specified at T

= +25°C, DC parameters only.

**Contact factory for availability and processing to MIL-STD-883.

( ) ARE FOR MAX517

Pin Configurations continued at end of data sheet.

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.

Summary of content (16 pages)

PAGE 1
9-0393; Rev 1; 9/02 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs The MAX517/MAX518/MAX519 are 8-bit voltage output digital-to-analog converters (DACs) with a simple 2-wire serial interface that allows communication between multiple devices. They operate from a single 5V supply and their internal precision buffers allow the DAC outputs to swing rail-to-rail. The MAX517 is a single DAC and the MAX518/MAX519 are dual DACs. The MAX518 uses the supply voltage as the reference for both DACs.
PAGE 2
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V OUT_ ..........................................................-0.3V to (VDD + 0.3V) REF_ (MAX517, MAX519)...........................-0.3V to (VDD + 0.3V) AD_.............................................................-0.3V to (VDD + 0.3V) SCL, SDA to GND.....................................................-0.
PAGE 3
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs (VDD = 5V ±10%, VREF_ = 4V (MAX517, MAX519), RL = 10kΩ, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.
PAGE 4
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs ELECTRICAL CHARACTERISTICS (continued) (VDD = 5V ±10%, VREF_ = 4V (MAX517, MAX519), RL = 10kΩ, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.
PAGE 5
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs 8 4 2 1.5 2.0 2.5 3.0 3.5 4.0 MAX519, DAC CODE = FF HEX 1.5 1.0 MAX517, DAC CODE = FF HEX MAX517, MAX519 DAC CODE = 00 HEX 0 0 0.5 1.0 1.5 -55 -35 -15 5 2.0 25 45 65 85 105 125 OUTPUT SINK CURRENT (mA) TEMPERATURE (°C) MAX518 SUPPLY CURRENT vs. TEMPERATURE MAX518 SUPPLY CURRENT vs. DAC CODE SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 2.0 1.5 DAC CODE = FF HEX 1.5 1.0 0.5 DAC CODE = 00 HEX 0.5 2.
PAGE 6
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs ______________________________Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.
PAGE 7
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs PIN NAME FUNCTION MAX517 MAX518 MAX519 1 1 1 OUT0 DAC0 Voltage Output 2 2 4 GND Ground — — 5 AD3 Address Input 3; sets IC’s slave address 3 3 6 SCL Serial Clock Input 4 4 8 SDA Serial Data Input — — 9 AD2 Address Input 2; sets IC’s slave address 5 5 10 AD1 Address Input 1; sets IC’s slave address 6 6 11 AD0 Address Input 0; sets IC’s slave address 7 7 12 VDD Power Supply, +5V; used as reference for MAX518 —
PAGE 8
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs SDA tSU, DAT tBUF tSU, STA tHD, STA tLOW tSU, STO tHD, DAT SCL tHIGH tHD, STA tR tF START CONDITION REPEATED START CONDITION STOP CONDITION START CONDITION Figure 2.
PAGE 9
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs COMMAND BYTE MAX517/MAX518/MAX519 SLAVE ADDRESS BYTE OUTPUT BYTE SDA MSB LSB ACK MSB LSB ACK MSB LSB ACK SCL STOP CONDITION START CONDITION Figure 4. A Complete Serial Transmission R2 R1 R0 RST X SDA SDA A0/0 PD MSB ACK X LSB SCL SCL START CONDITION STOP CONDITION R2, R1, R0: RESERVED BITS. SET TO 0. Figure 5. All communications begin with a START condition and end with a STOP condition, both generated by a bus master.
PAGE 10
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs 0 1 1 1 or or 0 AD3 AD2AD1 AD0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 SDA ADDRESS BYTE START CONDITION COMMAND BYTE (ADDRESSING DAC0) ACK ACK STOP DAC0 INPUT LATCH CONDITION SET TO FULL SCALE DAC OUTPUT CHANGES HERE: DAC0 GOES TO FULL SCALE. OUTPUT BYTE (FULL SCALE) ACK ( ) ( ) Figure 8a.
PAGE 11
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs (a) 0 1 1 1 or or 0 AD3 AD2 AD1 AD0 0 All changes made during a transmission affect the MAX517/MAX518/MAX519’s outputs only when the transmission ends and a STOP has been recognized. The R0, R1, and R2 bits are reserved and must be set to zero. I2C Compatibility The MAX517/MAX518/MAX519 are fully compatible with existing I 2 C systems. SCL and SDA are highimpedance inputs; SDA has an open drain that pulls the data line low during the 9th clock pulse.
PAGE 12
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs latches with data that has not been transferred to the output latches (Figure 13). Only the currently addressed device will recognize a STOP condition and transfer data to its output latches. If the device is left with data in its input latches, the data can be transferred to the output latches the next time the device is addressed, as long as it receives at least one command byte and a STOP condition.
PAGE 13
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs 0 1 1 1 or or 0 AD3 AD2 AD1 AD0 0 0 MAX517/MAX518/MAX519 (a) (RST) (PD) 0 0 0 1 1 0 SDA ADDRESS BYTE ACK START CONDITION (b) 0 1 1 1 or or 0 AD3 AD2 AD1 AD0 0 0 0 INTERRUPTED COMMAND BYTE EARLY MAX517/MAX518/MAX519's STOP CONDITION STATE REMAINS UNCHANGED.
PAGE 14
MAX517/MAX518/MAX519 2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs SYSTEM GND +5V OUT1 OUT0 REF0 N.C. N.C. N.C. REF1 GND 0.1µF VDD RF REF_ CF MAX517 MAX519 Figure 16. PC Board Layout for Minimizing MAX519 Crosstalk (bottom view) __________Applications Information Power-Supply Bypassing and Ground Management Bypass VDD with a 0.1µF capacitor, located as close to VDD and GND as possible. Careful PC board layout minimizes crosstalk among DAC outputs, reference inputs, and digital inputs.
PAGE 15
2-Wire Serial 8-Bit DACs with Rail-to-Rail Outputs ____________________Chip Topography TOP VIEW OUT0 OUT0 1 16 OUT1 N.C. 2 15 REF0 N.C. 3 14 N.C. GND 4 MAX519 OUT1 (MAX518/MAX519) REF0 (MAX517/ MAX519) REF1 (MAX519) 13 REF1 AD3 5 12 VDD SCL 6 11 AD0 N.C. 7 10 AD1 SDA 8 9 GND 0.135" (3.
PAGE 16
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS PDIPN.