MAX5318 MAXIM [Maxim Integrated Products], MAX5318 Datasheet

MAX5318

Manufacturer Part Number

MAX5318

Description

18-Bit, High-Accuracy Voltage Output DAC with Digital Gain, Offset Control, and SPI Interface

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX5318.pdf (41 pages)

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For related parts and recommended products to use with this part,

refer to www.maximintegrated.com/MAX5318.related.

The MAX5318 is a high-accuracy, 18-bit, serial SPI input,

buffered voltage output digital-to-analog converter (DAC)

in a 4.4mm x 7.8mm, 24-lead TSSOP package. The

device features Q2 LSB INL (max) accuracy and a Q1

LSB DNL (max) accuracy over the full temperature range

of -40NC to +105NC.

The DAC voltage output is buffered resulting in a fast

settling time of 3Fs and a low offset and gain drift of

Q0.5ppm/NC of FSR (typ). The force-sense output (OUT)

maintains accuracy while driving loads with long lead

lengths. Additionally, a separate AVSS supply, allows the

output amplifier to go to 0V (GND) while maintaining full

linearity performance.

The MAX5318 includes user-programmable digital gain

and offset correction to enable easy system calibration.

At power-up, the device resets its outputs to zero or mid-

scale. The wide 2.7V to 5.5V supply voltage range and

integrated low-drift, low-noise reference buffer amplifier

make for ease of use.

The MAX5318 features a 50MHz 3-wire SPI interface. The

MAX5318 is available in a 24-lead TSSOP package and

operates over the -40NC to +105NC temperature range.

Test and Measurement

Equipment

Automatic Test Equipment

Gain and Offset

Adjustment

Data-Acquisition Systems

Process Control and

Servo Loops

For pricing, delivery, and ordering information, please contact Maxim Direct

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

18-Bit, High-Accuracy Voltage Output DAC with

Digital Gain, Offset Control, and SPI Interface

General Description

Programmable Voltage

and Current Sources

Automatic Tuning and

Calibration

Communication Systems

Medical Imaging

Applications

S Ideal for ATE and High-Precision Instruments

S Fast Settling Time (3µs) with 10kI || 100pF Load

S Safe Power-Up-Reset to Zero or Midscale DAC

S Negative Supply (AVSS) Option Allows Full INL

S SPI Interface Compatible with 1.8V to 5.5V Logic

S High Integration Reduces Development Time and

S Small 4.4mm x 7.8mm, 24-Pin TSSOP Package

Ordering Information

at end of data sheet.

SPI

 INL Accuracy Guaranteed with ±2 LSB (Max)

Output (Pin-Selectable)

 Predetermined Output Device State in Power-Up

and DNL Performance to 0V

PCB Area

 Buffered Voltage Output Directly Drives

 Integrated Reference Buffer

 No External Amplifiers Required

TC/SB

LDAC

READY

BUSY

DOUT

SCLK

RST

M/Z

Over Temperature

and Reset in System Design

2kI Load Rail-to-Rail

DIN

INTERFACE

CONTROL

LOGIC

SPI

DGND

DDIO

MAX5318

SHUTDOWN

DIGITAL

OFFSET

DIGITAL

POWER-ON

GAIN

DIN

RESET

and

Benefits and Features

EVALUATION KIT AVAILABLE

Typical Operating Circuit

Functional Diagram

REF

BYPASS

BUFFER

INPUT/DAC

AGND

MAX5318

18-BIT

DAC

AGND_S

AVDD1

19-6465; Rev 0; 9/12

7.8kI

AVDD2

AGND_F

7.8kI

OUTPUT

BUFFER

appear

7.8kI

AVSS

REFO

RFB

OUT

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