MAX5318 Datasheet, PDF (1/41 Pages) Maxim Integrated Products – 18-Bit, High-Accuracy Voltage Output DAC with Digital Gain, Offset Control, and SPI Interface

EVALUATION KIT AVAILABLE
MAX5318
18-Bit, High-Accuracy Voltage Output DAC with
Digital Gain, Offset Control, and SPI Interface
General Description
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.
Benefits and Features
S Ideal for ATE and High-Precision Instruments
 INL Accuracy Guaranteed with ±2 LSB (Max)
Over Temperature
S Fast Settling Time (3µs) with 10kI || 100pF Load
S Safe Power-Up-Reset to Zero or Midscale DAC
Output (Pin-Selectable)
 Predetermined Output Device State in Power-Up
and Reset in System Design
S Negative Supply (AVSS) Option Allows Full INL
and DNL Performance to 0V
S SPI Interface Compatible with 1.8V to 5.5V Logic
S High Integration Reduces Development Time and
PCB Area
 Buffered Voltage Output Directly Drives
2kI Load Rail-to-Rail
 Integrated Reference Buffer
 No External Amplifiers Required
S Small 4.4mm x 7.8mm, 24-Pin TSSOP Package
Ordering Information and Typical Operating Circuit appear
at end of data sheet.
Applications
Test and Measurement
Equipment
Automatic Test Equipment
Gain and Offset
Adjustment
Data-Acquisition Systems
Process Control and
Servo Loops
Programmable Voltage
and Current Sources
Automatic Tuning and
Calibration
Communication Systems
Medical Imaging
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/MAX5318.related.
Functional Diagram
VDDIO
24
MAX5318
LDAC 5
CS 9
SCLK 8
SPI
DIN 7
SPI
DOUT 6 ^INTERFACE
READY 2
DIGITAL
OFFSET
DIGITAL
GAIN
DIN
BUSY 4
RST 1
M/Z 3
TC/SB 10
PD 11
CONTROL
LOGIC
POWER-ON
RESET
SHUTDOWN
23
DGND
REF
18
BUFFER
AVDD1
14
AVDD2
21
17 REFO
7.8kI
INPUT/DAC
REGISTER
7.8kI
18-BIT
DAC
7.8kI _{16 RFB}
OUTPUT ^{15 OUT}
BUFFER
7.8kI
22
13
BYPASS AGND
19
AGND_S
20
12
AGND_F AVSS
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6465; Rev 0; 9/12