ADS8201 Datasheet, PDF (1/33 Pages) Texas Instruments – 2.2V to 5.5V,Low-Power, 12-Bit, 100kSPS, 8-Channel Data Acquisition System with PGA and SPI™ Interface

ADS8201
ADS8201
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
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•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 V_REF)
– 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.
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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.
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SPI is a trademark of Motorola Inc.
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All other trademarks are the property of their respective owners.
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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