DAC9881 Digital-to-Analog Converter Datasheet

DAC9881 Datasheet, PDF, Equivalent


Part Number

DAC9881

Description

Digital-to-Analog Converter

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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DAC9881
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DAC9881
SBAS438C – MAY 2008 – REVISED NOVEMBER 2019
DAC9881 18-Bit, Single-Channel, Low-Noise, Voltage-Output
Digital-to-Analog Converter
1 Features
1 18-bit monotonic over temperature range
• Relative accuracy: ±2 LSB maximum
• Low-noise: 24 nV/Hz
• Fast settling: 5 μs
• On-chip output buffer amplifier with rail-to-rail
operation
• Single power supply: 2.7 V to 5.5 V
• DAC loading control
• Selectable power-on reset to zero-scale or
midscale
• Power-down mode
• Unipolar straight binary or
two's complement input mode
• Fast SPI with Schmitt-triggered inputs: up to 50
MHz, 1.8-V, 3-V, and 5-V logic
• Specified temperature range: –40°C to +105°C
• Small package: VQFN-24, 4 mm × 4 mm
2 Applications
Semiconductor test
Oscilloscope (DSO)
X-ray systems
Lab and field instrumentation
Data acquisition (DAQ)
3 Description
The DAC9881 is an 18-bit, single-channel, voltage-
output digital-to-analog converter (DAC). The device
features 18-bit monotonicity, excellent linearity, very
low-noise, and fast settling time. The on-chip
precision output amplifier allows for a rail-to-rail
output swing to be achieved over the full supply
range of 2.7 V to 5.5 V.
The device supports a standard serial peripheral
interface (SPI) capable of operating with input data
clock frequencies of up to 50 MHz. The DAC9881
requires an external reference voltage to set the
output range of the DAC channel. A programmable
power-on reset circuit is also incorporated into the
device to make sure that the DAC output powers up
at zero-scale or midscale, and remains there until a
valid write command.
Additionally, the DAC9881 has the capability to
function in either unipolar straight binary or two's
complement mode. The DAC9881 provides low-
power operation. To further save energy, power-down
mode can be achieved by accessing the PDN pin,
thereby reducing the current consumption to 25 µA at
5 V. Power consumption is 4 mW at 5 V, reducing to
125 µW in power-down mode.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DAC9881
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
RST
RSTSEL
USB/BTC
GAIN
DGND
IOVDD
Block Diagram
AGND
AVDD
VREFH-S VREFH-F
Control
Logic
Power-On
Reset
Resistor
Network
DAC9881
SDI
CS
SCLK
SDOSEL
SDO
Serial Out
Control
Input
Register
DAC
Latch
DAC
PDN
RFB
VOUT
RFB
LDAC
VREFL-S
VREFL-F
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

DAC9881
DAC9881
SBAS438C – MAY 2008 – REVISED NOVEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics: AVDD = 5 V ...................... 6
6.6 Electrical Characteristics: AVDD = 2.7 V ................... 8
6.7 Timing Requirements—Standalone Operation
Without SDO ............................................................ 10
6.8 Timing Requirements—Standalone Operation With
SDO and Daisy-Chain Mode.................................... 11
6.9 Typical Characteristics: AVDD = 5 V ....................... 15
6.10 Typical Characteristics: AVDD = 2.7 V .................. 22
7 Detailed Description ............................................ 26
7.1 Overview ................................................................. 26
7.2 Functional Block Diagram ....................................... 27
7.3 Feature Description................................................. 28
7.4 Device Functional Modes........................................ 32
8 Application and Implementation ........................ 33
8.1 Application Information............................................ 33
8.2 Typical Application .................................................. 34
8.3 System Example ..................................................... 35
9 Power Supply Recommendations...................... 36
10 Layout................................................................... 36
10.1 Layout Guidelines ................................................. 36
10.2 Layout Example .................................................... 36
11 Device and Documentation Support ................. 37
11.1 Documentation Support ........................................ 37
11.2 Receiving Notification of Documentation Updates 37
11.3 Support Resources ............................................... 37
11.4 Trademarks ........................................................... 37
11.5 Electrostatic Discharge Caution ............................ 37
11.6 Glossary ................................................................ 37
12 Mechanical, Packaging, and Orderable
Information ........................................................... 37
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (March 2016) to Revision C
Page
• Added new text to end of Hardware Reset section regarding two's complement mode...................................................... 30
• Changed Table 3, Reset Values, to show updated content ................................................................................................. 30
Changes from Revision A (August 2008) to Revision B
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
2 Submit Documentation Feedback
Product Folder Links: DAC9881
Copyright © 2008–2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity Reference Design DAC9881 SBAS4 38C – MAY 2008 – REVISED NOVEMBER 2 019 DAC9881 18-Bit, Single-Channel, Low -Noise, Voltage-Output Digital-to-Analo g Converter 1 Features •1 18-bit mon otonic over temperature range • Relat ive accuracy: ±2 LSB maximum • Low-n oise: 24 nV/√Hz • Fast settling: 5 μs • On-chip output buffer amplifier with rail-to-rail operation • Single power supply: 2.7 V to 5.5 V • DAC l oading control • Selectable power-on reset to zero-scale or midscale • Pow er-down mode • Unipolar straight bina ry or two's complement input mode • F ast SPI with Schmitt-triggered inputs: up to 50 MHz, 1.8-V, 3-V, and 5-V logic • Specified temperature range: –40 °C to +105°C • Small package: VQFN- 24, 4 mm × 4 mm 2 Applications • Sem iconductor test • Oscilloscope (DSO) • X-ray systems • Lab and field ins trumentation • Data acquisition (DAQ) 3 Description The DAC9881 is an 18-bit, single-channel, voltageoutput d.
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