SAR ADC. ADS7041 Datasheet

ADS7041 ADC. Datasheet pdf. Equivalent

Part ADS7041
Description 10-Bit 1-MSPS SAR ADC
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ADS7041
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ADS7041
SBAS675C – NOVEMBER 2014 – REVISED DECEMBER 2015
ADS7041 Ultra-Low Power, Ultra-Small Size, 10-Bit, 1-MSPS, SAR ADC
1 Features
1 Industry's First SAR ADC with Nanowatt Power
Consumption:
– 189 µW at 1 MSPS with 1.8-V AVDD
– 600 µW at 1 MSPS with 3-V AVDD
– 60 µW at 100 kSPS with 3-V AVDD
– Less than 1 µW at 1 kSPS with 3-V AVDD
• Industry's Smallest SAR ADC:
– X2QFN-8 Package with 2.25-mm2 Footprint
• 1-MSPS Throughput with Zero Data Latency
• Wide Operating Range:
– AVDD: 1.65 V to 3.6 V
– DVDD: 1.65 V to 3.6 V (Independent of AVDD)
– Temperature Range: –40°C to 125°C
• Excellent Performance:
– 10-Bit Resolution with NMC
– ±0.8-LSB (Max) INL, ±0.7-LSB (Max) DNL
– 61-dB SNR with 3-V AVDD
– –75-dB THD with 3-V AVDD
• Unipolar Input Range: 0 V to AVDD
• Integrated Offset Calibration
• SPI™-Compatible Serial Interface: 14 MHz
• JESD8-7A Compliant Digital I/O
2 Applications
• Low-Power Data Acquisition
• Battery-Powered Handheld Equipment
• Level Sensors
• Ultrasonic Flow Meters
• Motor Control
• Wearable Fitness
• Portable Medical Equipment
• Hard Drives
• Glucose Meters
3 Description
The ADS7041 is a 10-bit, 1-MSPS, analog-to-digital
converter (ADC). The device supports a wide analog
input voltage range (1.65 V to 3.6 V) and includes a
capacitor-based, successive-approximation register
(SAR) ADC with an inherent sample-and-hold circuit.
The SPI-compatible serial interface is controlled by
the CS and SCLK signals. The input signal is
sampled with the CS falling edge and SCLK is used
for conversion and serial data output. The device
supports a wide digital supply range (1.65 V to 3.6 V),
enabling direct interface to a variety of host
controllers. The ADS7041 complies with the JESD8-
7A standard for a normal DVDD range (1.65 V to
1.95 V).
The ADS7041 is available in 8-pin, miniature, leaded,
and X2QFN packages and is specified for operation
from –40°C to 125°C. Miniature form-factor and
extremely low-power consumption make this device
suitable for space-constrained, battery-powered
applications.
PART NAME
ADS7041
Device Information(1)
PACKAGE
BODY SIZE (NOM)
X2QFN (8)
1.50 mm × 1.50 mm
VSSOP (8)
2.30 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
space
space
space
VIN+
+
±
Typical Application
OPA_AVDD
+R
OPA_AVSS
C
AVDD AVDD used as
Reference for device
AINP
AVDD
Device
AINM
GND
RUG (8)
1.5mm
1.5mm
Actual Device Size
1.5 x 1.5 x 0.35(H) mm
NOTE: The ADS7041 is smaller than a
0805 (2012 metric) SMD component.
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.



ADS7041
ADS7041
SBAS675C – NOVEMBER 2014 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
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........................................... 6
6.6 Timing Characteristics............................................... 7
6.7 Typical Characteristics .............................................. 8
7 Parameter Measurement Information ................ 13
7.1 Digital Voltage Levels ............................................. 13
8 Detailed Description ............................................ 14
8.1 Overview ................................................................. 14
8.2 Functional Block Diagram ....................................... 14
8.3 Feature Description................................................. 15
8.4 Device Functional Modes........................................ 19
9 Application and Implementation ........................ 22
9.1 Application Information............................................ 22
9.2 Typical Applications ................................................ 22
10 Power-Supply Recommendations ..................... 30
10.1 AVDD and DVDD Supply Recommendations....... 30
10.2 Estimating Digital Power Consumption................. 30
10.3 Optimizing Power Consumed by the Device ........ 30
11 Layout................................................................... 31
11.1 Layout Guidelines ................................................. 31
11.2 Layout Example .................................................... 31
12 Device and Documentation Support ................. 32
12.1 Documentation Support ........................................ 32
12.2 Community Resources.......................................... 32
12.3 Trademarks ........................................................... 32
12.4 Electrostatic Discharge Caution ............................ 32
12.5 Glossary ................................................................ 32
13 Mechanical, Packaging, and Orderable
Information ........................................................... 32
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (February 2015) to Revision C
Page
• Updated Figure 1 ................................................................................................................................................................... 7
• Changed Serial Interface section: changed last half of first paragraph, changed Figure 35 ............................................... 18
• Changed Figure 38 .............................................................................................................................................................. 21
• Added Community Resources section ................................................................................................................................ 32
Changes from Revision A (November 2014) to Revision B
Page
• Changed Wide Operating Range Features bullet: changed the value of AVDD from 1.8 V to 1.65 V ................................. 1
• Changed the wide analog input voltage range value to 1.65 V in first paragraph of Description section.............................. 1
• Changed ESD Ratings table to latest standards ................................................................................................................... 5
• Changed AVDD parameter minimum specification in Recommended Operating Conditions table to 1.65 V ....................... 5
• Changed AVDD range in conditions of Electrical Characteristics table ................................................................................. 6
• Changed INL and DNL parameter test conditions in Electrical Characteristics table ........................................................... 6
• Changed EO parameter calibrated test conditions in Electrical Characteristics table ............................................................ 6
• Changed maximum throughput rate parameter test conditions in Electrical Characteristics table ....................................... 6
• Changed AVDD parameter minimum specification in Electrical Characteristics table........................................................... 6
• Changed conditions for Timing Characteristics table: changed range of AVDD and added CLOAD condition ........................ 7
• Changed t D_CKDO parameter in Timing Characteristics table ................................................................................................ 7
• Added fSCLK minimum specification to Timing Characteristics table ...................................................................................... 7
• Changed titles of Figure 26 to Figure 30 .............................................................................................................................. 11
• Changed Reference sub-section in Feature Description section ......................................................................................... 15
• Changed range of second fCLK-CAL parameter description in Table 2 ................................................................................... 20
• Changed range of second fCLK-CAL parameter description in Table 3 .................................................................................. 21
• Changed Reference Circuit section in Application Information ............................................................................................ 24
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