ADS8331_15 Datasheet, PDF (1/57 Pages) Texas Instruments – Low-Power, 16-Bit, 500-kSPS, 4-/8-Channel Unipolar Input Analog-to-Digital Converters

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
ADS8331, ADS8332
SBAS363D – DECEMBER 2009 – REVISED OCTOBER 2015
ADS833x Low-Power, 16-Bit, 500-kSPS, 4-/8-Channel Unipolar Input
Analog-to-Digital Converters With Serial Interface
1 Features
•1 Low-Power, Flexible Supply Range:
– 2.7-V to 5.5-V Analog Supply
– 8.7 mW (250 kSPS in Auto-NAP Mode,
VA = 2.7 V, VBD = 1.65 V)
– 14.2 mW (500 kSPS, VA = 2.7 V,
VBD = 1.65 V)
• Up to 500-kSPS Sampling Rate
• Excellent DC Performance:
– ±1.2 LSB Typical, ±2 LSB Maximum INL at
2.7 V
– ±0.6 LSB Typical, –1/1.5 LSB Maximum DNL
at 2.7 V
– 16-Bit NMC Over Temperature
• Excellent AC Performance at 5 V, f_IN = 1 kHz:
– 91.5-dB SNR, 101-dB SFDR, –100-dB THD
• Flexible Analog Input Arrangement:
– On-Chip 4-/8-Channel Mux With Breakout
– Auto/Manual Channel Select and Trigger
• Other Hardware Features:
– On-Chip Conversion Clock (CCLK)
– Software/Hardware Reset
– Programmable Status/Polarity EOC/INT
– Daisy-Chain Mode
– Global CONVST (Independent of CS)
– Deep, Nap, and Auto-NAP Powerdown Modes
– SPI™/DSP Compatible Serial Interface
– Separate I/O Supply: 1.65 V to VA
– SCLK up to 40 MHz (VA = VBD = 5 V)
• 24-Pin 4-mm × 4-mm VQFN and 24-Pin TSSOP
Packages
2 Applications
• Communications
• Transducer Interfaces
• Medical Instruments
• Magnetometers
• Industrial Process Controls
• Data Acquisition Systems
• Automatic Test Equipment
3 Description
The ADS8331 is a low-power, 16-bit, 500-k samples-
per-second (SPS) analog-to-digital converter (ADC)
with a unipolar, 4-to-1 multiplexer (mux) input. The
device includes a 16-bit capacitor-based successive
approximation register (SAR) ADC with inherent
sample and hold.
The ADS8332 is based on the same core and
includes a unipolar 8-to-1 input mux. Both devices
offer a high-speed, wide-voltage serial interface and
are capable of daisy-chain operation when multiple
converters are used.
These converters are available in 24-pin, 4 × 4 QFN
and 24-pin TSSOP packages and are fully specified
for operation over the industrial –40°C to 85°C
temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS833x
VQFN (24)
TSSOP (24)
4.00 mm × 4.00 mm
7.80 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
IN[0:3]
or
IN[0:7]
COM
REF+
REF-
MUXOUT
M
U
X
ADCIN
+
_
SAR
CDAC
Comparator
Output
Latch
and
3-State
Driver
Conversion
and
Control
Logic
SDO
FS/CS
SCLK
SDI
CONVST
EOC/INT/CDI
RESET
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.