System. ADS8201 Datasheet

ADS8201 Datasheet PDF


Part

ADS8201

Description

8-Channel Data Acquisition System

Manufacture

etcTI

Page 30 Pages
Datasheet
Download ADS8201 Datasheet


ADS8201 Datasheet
ADS8201ADS8201
www.ti.com
SLAS534B – JULY 2009 – REVISED MAY 2010
2.2V to 5.5V, Low-Power, 12-Bit, 100kSPS, 8-Channel
Data Acquisition System with PGA and SPI™ Interface
Check for Samples: ADS8201
FEATURES
1
234 Low-Power, Flexible Supply Range:
– 2.2V to 5.5V Analog Supply
– 1.32mW (100kHz, +VA = 2.2V, +VD = 2.2V)
– 4.5mW (100kHz, +VA = 5V, +VD = 5V)
• Up to 100kSPS Throughput Rate
• Excellent DC Performance:
– ±0.5 LSB typ, ±1.5 LSB max INL
– ±0.5 LSB typ, ±1.0 LSB max DNL
– ±6 LSB Offset Error at +VA =5V
– ±0.1%FS Gain Error at +VA = 5V
• Flexible Analog Inputs:
– True Differential Input
– Differential/Unipolar Input Range (0 to VREF)
– TAG Bit Output
– Programmable Averaging Function
– Onboard, Eight Single-Ended/Four
Differential Channel Mux:
– High Input Impedance
– High-Performance PGA (Gain = 1/2/4/8)
– PGA Breakout
– Auto/Manual Channel Select with Gain
– Auto/Manual Trigger
– Mixed Type Partial Scan
• Built-in Hardware Features:
– On-chip Conversion Clock (CCLK)
– Hardware/Software Reset
– Programmable Status/Polarity for BUSY/INT
• Flexible I/O:
– SPI-/ DSP™-Compatible Serial Interface
– Separate I/O Supply (2.2V to 5.5V)
– Onboard 8×1 FIFO Buffer
– SCLK up to 25MHz (VD = 5V)
...
• Multi-Chip Ready and Fully Enabled:
– Global CONVST (Independent of CS)
• Power-Down Mode
• 24-Pin 4×4 QFN Package
APPLICATIONS
• Portable Communications
• Transducer Interfaces
• Portable Medical Instruments
• Data Acquisition Systems
• GPS Chipsets
...
DESCRIPTION
The ADS8201 is a low-power, complete on-chip data
acquisition system optimized for portable applications
that require direct connections, wide dynamic range,
and automatic operation with very low power
consumption. The device includes a 12-bit,
capacitor-based, successive approximation register
(SAR) analog-to-digital converter (ADC); a
high-performance, continuous-time programmable
gain amplifier (PGA); and a fully automatic scan,
8-to-1 multiplexer (mux) with breakout to allow for
system design flexibility.
Many other features are included to further optimize
system operation. Conversion results may be saved
in an onboard first-in/first-out (FIFO) buffer and read
out at a later time. Each channel has a gain setting
that can be loaded automatically when it is selected.
To simplify the serial port design, the ADS8201 offers
a high-speed, wide-voltage serial interface. The
ADS8201 is ideal for sensor applications (for
example, bridge sensors, pressure sensors,
accelerometers, gyrosensors, temperature sensors,
etc.) as used in gaming and navigation.
The ADS8201 is available in a 24-lead, 4x4 QFN
package, and is specified over the –40°C to +85°C
industrial temperature range.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DSP is a trademark of Texas Instruments.
2
SPI is a trademark of Motorola Inc.
3
All other trademarks are the property of their respective owners.
4
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009–2010, Texas Instruments Incorporated

ADS8201 Datasheet
ADS8201
SLAS534B – JULY 2009 – REVISED MAY 2010
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PRODUCT
ADS8201I
MAXIMUM
INTEGRAL
LINEARITY
ERROR
(LSB)
±1.5
PACKAGE/ORDERING INFORMATION(1)
MAXIMUM
DIFFERENTIAL
LINEARITY
(LSB)
MAXIMUM
OFFSET
ERROR
(LSB)
PACKAGE-
LEAD
PACKAGE
DESIGNATOR
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
±1
±6 QFN-24
RGE
–40°C to +85°C
ADS8201
ORDERING
NUMBER
ADS8201IRGET
ADS8201IRGER
TRANSPORT
MEDIA,
QUANTITY
Tape and Reel, 250
Tape and Reel,
3000
(1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet, or visit
the device product folder on www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
Over operating free-air temperature range, unless otherwise noted.
ADS8201I
UNIT
Voltage
+INI to AGND
–INI to AGND
+VA to AGND
–0.3 to +VA +0.3
–0.3 to +VA +0.3
–0.3 to 7
V
V
V
Voltage range
+VD to DGND
–0.3 to 7
V
AGND to DGND
–0.3 to +0.3
V
Digital input voltage to DGND
–0.3 to VD +0.3
V
Digital output voltage to DGND
–0.3 to VD +0.3
Operating free-air temperature range, TA
Storage temperature range, TSTG
Junction temperature, TJ max
Package dissipation ratings: 4 × 4 QFN-16
Thermal impedance, qJA
–40 to +85
–65 to +150
+150
(TJmax – TA)/qJA
46
°C
°C
°C
°C/W
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not supported.
ELECTRICAL CHARACTERISTICS
At TA = –40°C to +85°C, 2.2V < VA = VREF < 5.5V, 2.2V < VD < 5.5V, fSAMPLE = 100kHz, and gain = 1, unless otherwise noted.
ADS8201I
PARAMETER
TEST CONDITIONS
MIN TYP
MAX UNIT
ANALOG INPUT (IN0 to IN7)
FSR
VIN
CIN
IIL
Full-scale input range
Absolute input voltage range
Input capacitance
Input leakage current
Input channel crosstalk
(INI – INI–1), gain = 1
+INI pin
With input selected
No mux switching, dc input
IN = VREF/2, INI+1,
INI-1= 0 – VREF span at 1kHz
0
AGND + 0.1
VREF
+VA – 0.1
V
V
4 pF
1 nA
105 dB
2 Submit Documentation Feedback
Product Folder Link(s): ADS8201
Copyright © 2009–2010, Texas Instruments Incorporated


Features Datasheet pdf ADS8201ADS8201 www.ti.com SLAS534B – JULY 2009 – REVISED MAY 2010 2.2V to 5.5V, Low-Power, 12-Bit, 100kSPS, 8-Ch annel Data Acquisition System with PGA and SPI™ Interface Check for Samples: ADS8201 FEATURES 1 •234 Low-Power, Flexible Supply Range: – 2.2V to 5.5V Analog Supply – 1.32mW (100kHz, +VA = 2.2V, +VD = 2.2V) – 4.5mW (100kHz, +VA = 5V, +VD = 5V) • Up to 100kSPS T hroughput Rate • Excellent DC Perform ance: – ±0.5 LSB typ, ±1.5 LSB max INL – ±0.5 LSB typ, ±1.0 LSB max DN L – ±6 LSB Offset Error at +VA =5V ±0.1%FS Gain Error at +VA = 5V • Flexible Analog Inputs: – True Differ ential Input – Differential/Unipolar Input Range (0 to VREF) – TAG Bit Out put – Programmable Averaging Function – Onboard, Eight Single-Ended/Four D ifferential Channel Mux: – High Input Impedance – High-Performance PGA (Ga in = 1/2/4/8) – PGA Breakout – Auto /Manual Channel Select with Gain – Au to/Manual Trigger – Mixed Type Partial Scan • Built-in Hardware Features: – On-chip Conversion Clock (CCLK) – Hardwar.
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