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ADS8339
SBAS677A –JUNE 2014–REVISED OCTOBER 2014
ADS8339 16-Bit, 250-kSPS, Serial Interface, Micro-Power, Miniature,
SAR Analog-to-Digital Converter
1 Features
•Sample Rate: 250 kHz
•16-Bit Resolution
•Zero Latency at Full Speed
•Unipolar Single-Ended Input Range:
–0 V to Vref
•SPI™-Compatible Serial Interface with DaisyChain Option
•Uses Internal Clock for Conversion
•Excellent Performance:
–93.6 dB SNR (typ) at 10-kHz Input
––106 dB THD (typ) at 10-kHz Input
–±2.0 LSB INL (max)
–±1.0 LSB DNL (max)
•Low-Power Dissipation:
–17.5 mW (typ) at 250 kSPS
•Power Scales Linearly with Speed:
–1.75 mW at 25 kSPS
•Power Dissipation During Power-Down State:
–0.25 μW (typ)
•Package: VSSOP-10
3 Description
The ADS8339 is a 16-bit, 250-kSPS, analog-to-digital converter (ADC). The device operates with a 2.25-V to 5.5-V external reference. The device includes a capacitor-based, successive-approximation register (SAR) ADC with an inherent sample-and-hold circuit.
The device includes a 25-MHz, SPI-compatible serial interface. The interface is designed to support daisychaining or cascading of multiple devices. Furthermore, a busy indicator makes synchronizing with the digital host easy. The unipolar, single-ended input range for the device supports an input swing of 0 V to Vref.
The device is optimized for low-power operation and power consumption scales directly with speed. This feature makes the device attractive for lower speed applications. The ADS8339 is available in a VSSOP10 package.
Device Information(1)
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
ADS8339 |
VSSOP (10) |
3.00 mm × 3.00 mm |
(1)For all available packages, see the orderable addendum at the end of the datasheet.
2 Applications
•Battery-Powered Equipment
•Data Acquisition Systems
•Instrumentation and Process Controls
•Medical Electronics
•Optical Networking
REF |
+100 mV |
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2.25 V to +VA + 0.1 V |
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IN+ |
4.5 V to 5.5 V |
2.375 V to +VA |
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0 V |
+VA |
REFIN |
+VBD |
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100 mV |
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SDO |
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IN+ |
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VDIFF = (IN+) t ( IN) = 0 V to REF |
ADS8339 |
SDI |
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NOTE: (IN+) • ( IN) |
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SCLK |
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IN |
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100 mV |
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CONVST |
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r100 mV |
GND |
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IN |
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0 V |
Pseudo-Differential Input |
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100 mV |
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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.
ADS8339
SBAS677A –JUNE 2014–REVISED OCTOBER 2014 www.ti.com
Table of Contents
1 |
Features .................................................................. |
1 |
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9.2 |
Functional Block Diagram ....................................... |
16 |
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2 |
Applications ........................................................... |
1 |
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9.3 |
Feature Description................................................. |
17 |
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3 |
Description ............................................................. |
1 |
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9.4 |
Device Functional Modes........................................ |
18 |
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4 |
Revision History..................................................... |
2 |
10 |
Application and Implementation........................ |
26 |
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5 |
Device Family |
3 |
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10.1 |
Application Information.......................................... |
26 |
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10.2 |
Typical Application |
30 |
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6 |
Pin Configuration and Functions |
3 |
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10.3 |
Do's and Don'ts |
31 |
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Specifications |
4 |
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11 |
Power-Supply Recommendations |
31 |
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7.1 |
Absolute Maximum Ratings |
4 |
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12 |
Layout |
32 |
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7.2 |
Handling Ratings |
4 |
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12.1 |
Layout Guidelines |
32 |
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7.3 |
Recommended Operating Conditions |
4 |
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12.2 |
Layout Example |
32 |
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7.4 |
Thermal Information |
5 |
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13 |
Device and Documentation Support |
33 |
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7.5 |
Electrical Characteristics........................................... |
5 |
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7.6 |
Timing Requirements |
7 |
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13.1 |
Documentation Support ........................................ |
33 |
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13.2 |
Trademarks |
33 |
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7.7 |
Typical Characteristics |
8 |
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13.3 |
Electrostatic Discharge Caution |
33 |
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8 |
Parametric Measurement Information |
15 |
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13.4 |
Glossary |
33 |
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8.1 |
Timing Diagrams |
15 |
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14 Mechanical, Packaging, and Orderable |
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9 |
Detailed Description |
16 |
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Information |
33 |
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9.1 |
Overview |
16 |
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4 Revision History
Changes from Original (June 2014) to Revision A |
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• Made changes to product preview data sheet........................................................................................................................ |
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2 |
Submit Documentation Feedback |
Copyright © 2014, Texas Instruments Incorporated |
Product Folder Links: ADS8339
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ADS8339 |
www.ti.com |
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SBAS677A –JUNE 2014 –REVISED OCTOBER 2014 |
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5 Device Family(1) |
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SAMPLING RATE |
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16-BIT, SINGLE-ENDED |
16-BIT, DIFFERENTIAL |
18-BIT, DIFFERENTIAL |
100 kSPS |
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ADS8866 |
ADS8867 |
ADS8887 |
250 kSPS |
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ADS8339 |
— |
— |
400 kSPS |
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ADS8864 |
ADS8865 |
ADS8885 |
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500 kSPS |
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ADS8319 |
ADS8318 |
— |
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680 kSPS |
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ADS8862 |
ADS8863 |
ADS8883 |
1 MSPS |
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ADS8860 |
ADS8861 |
ADS8881 |
(1)All devices are pin-to-pin compatible. The ADS8339, ADS8319, and ADS8318 require a 4.5-V to 5.5-V analog supply. The remaining devices use a 2.7-V to 3.6-V analog supply.
6 Pin Configuration and Functions
DGS Package
VSSOP-10
(Top View)
REFIN |
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1 |
10 |
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+VBD |
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+VA |
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2 |
9 |
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SDI |
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3 |
8 |
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IN+ |
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SCLK |
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4 |
7 |
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SDO |
IN |
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5 |
6 |
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GND |
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CONVST |
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Pin Functions |
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PIN |
FUNCTION |
DESCRIPTION |
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NO. |
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NAME |
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1 |
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REFIN |
Input |
Reference (positive) input. Decouple to GND with a 0.1-μF bypass capacitor and a 10-μF storage |
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capacitor. |
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2 |
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+VA |
Supply |
Analog power supply. Decouple with the GND pin. |
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3 |
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+IN |
Input |
Noninverting analog signal input |
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4 |
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–IN |
Input |
Inverting analog signal input. Note that this input has a limited range of ±0.1 V and is typically |
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grounded at the input decoupling capacitor. |
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5 |
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GND |
Supply |
Device ground. Note that this pin is a common ground pin for both the analog power supply |
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(+VA) and digital I/O supply (+VBD). |
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Convert input. CONVST also functions as the |
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input in 3-wire interface mode. Refer to the |
6 |
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CONVST |
Input |
CS |
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Description and Timing Diagrams sections for more details. |
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7 |
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SDO |
Output |
Serial data output |
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8 |
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SCLK |
Input |
Serial I/O clock input. Data (on the SDO output) are synchronized with this clock. |
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Serial data input. The SDI level at the start of a conversion selects the mode of operation (such |
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9 |
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SDI |
Input |
as CS or daisy-chain mode). SDI also serves as the CS input in 4-wire interface mode. Refer to |
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the Description and Timing Diagrams sections for more details. |
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10 |
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+VBD |
Supply |
Digital I/O power supply. Decouple with the GND pin. |
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Copyright © 2014, Texas Instruments Incorporated |
Submit Documentation Feedback |
3 |
Product Folder Links: ADS8339