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ADS7886 Datasheet Preview

ADS7886 Datasheet

SAR Analog-to-Digital Converter

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ADS7886
SLAS492B – SEPTEMBER 2005 – REVISED AUGUST 2016
ADS7886 12-Bit, 1-MSPS, Micro-Power, Miniature
SAR Analog-to-Digital Converters
1 Features
1 1-MHz Sample Rate Serial Device
• 12-Bit Resolution
• Zero Latency
• 20-MHz Serial Interface
• Supply Range: 2.35 V to 5.25 V
• Typical Power Dissipation at 1 MSPS:
– 3.9 mW at 3-V VDD
– 7.5 mW at 5-V VDD
• INL ±1.25 LSB Maximum, ±0.65 LSB (Typical)
• DNL ±1 LSB Maximum, +0.4 / –0.65 LSB (Typical)
• Typical AC Performance:
72.25-dB SINAD, –84-dB THD
• Unipolar Input Range: 0 V to VDD
• Power Down Current: 1 µA
• Wide Input Bandwidth: 15 MHz at 3 dB
• 6-Pin SOT-23 and SC70 Packages
2 Applications
• Base Band Converters in Radio
Communication
• Motor Current and Bus Voltage Sensors in Digital
Drives
• Optical Networking (DWDM, MEMS Based
Switching)
• Optical Sensors
• Battery-Powered Systems
• Medical Instrumentations
• High-Speed Data Acquisition Systems
• High-Speed Closed-Loop Systems
3 Description
The ADS7886 is a 12-bit, 1-MSPS analog-to-digital
converter (ADC). The device includes a capacitor
based SAR A/D converter with inherent sample and
hold. The serial interface in each device is controlled
by the CS and SCLK signals for glueless connections
with microprocessors and DSPs. The input signal is
sampled with the falling edge of CS, and SCLK is
used for conversion and serial data output.
The device operates from a wide supply range from
2.35 V to 5.25 V. The low power consumption of the
device makes it suitable for battery-powered
applications. The device also includes a power down
feature for power saving at lower conversion speeds.
The high level of the digital input to the device is not
limited to device VDD. This means the digital input can
go as high as 5.25 V when device supply is 2.35 V.
This feature is useful when digital signals are coming
from other circuit with different supply levels. Also this
relaxes restriction on power-up sequencing.
The ADS7886 is available in 6-pin SOT-23 and SC70
packages and is specified for operation from –40°C to
125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS7886
SOT-23 (6)
SC70 (6)
2.90 mm × 1.60 mm
2.00 mm × 1.25 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
SAR
+IN
CDAC
COMPARATOR
OUTPUT
LATCHES
and
3−STATE
DRIVERS
SDO
VDD
CONVERSION
and
CONTROL
LOGIC
SCLK
CS
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.




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ADS7886 Datasheet Preview

ADS7886 Datasheet

SAR Analog-to-Digital Converter

No Preview Available !

ADS7886
SLAS492B – SEPTEMBER 2005 – REVISED AUGUST 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Timing Requirements ............................................... 7
7.7 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 14
8.1 Overview ................................................................. 14
8.2 Functional Block Diagram ....................................... 14
8.3 Feature Description................................................. 14
8.4 Device Functional Modes........................................ 15
9 Application and Implementation ........................ 16
9.1 Application Information............................................ 16
9.2 Typical Application .................................................. 16
10 Power Supply Recommendations ..................... 18
11 Layout................................................................... 18
11.1 Layout Guidelines ................................................. 18
11.2 Layout Example .................................................... 19
12 Device and Documentation Support ................. 20
12.1 Documentation Support ........................................ 20
12.2 Receiving Notification of Documentation Updates 20
12.3 Community Resource............................................ 20
12.4 Trademarks ........................................................... 20
12.5 Electrostatic Discharge Caution ............................ 20
12.6 Glossary ................................................................ 20
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (November 2009) 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
• Deleted Package/Ordering Information table, see POA at the end of the datasheet. ........................................................... 1
• Changed RθJA values from: 295.2 °C/W to: 113.4 °C/W for DBV package ............................................................................ 4
• Changed RθJA values from: 351.3 °C/W to: 149.6 °C/W for DCK package ........................................................................... 4
Changes from Original (September 2005) to Revision A
Page
• Added VIH information............................................................................................................................................................. 5
• Changed VIH information ........................................................................................................................................................ 5
2
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Copyright © 2005–2016, Texas Instruments Incorporated



Part Number ADS7886
Description SAR Analog-to-Digital Converter
Maker etcTI
Total Page 3 Pages
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