ADS8327_14 Datasheet, PDF (1/51 Pages) Texas Instruments – LOW POWER, 16-BIT, 500-kHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE

ADS8327
ADS8328
www.ti.com
SLAS415E – APRIL 2006 – REVISED JANUARY 2011
LOW POWER, 16-BIT, 500-kHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL
CONVERTERS WITH SERIAL INTERFACE
Check for Samples: ADS8327, ADS8328
FEATURES
1
• 2.7-V to 5.5-V Analog Supply, Low Power:
– 10.6 mW (500 kHz, +VA = 2.7 V,
+VBD = 1.8 V)
• 500-kHz Sampling Rate
• Excellent DC Performance
– ±1.5 LSB Typ, ±2 LSB Max INL
– ±0.6 LSB Typ, ±1 LSB Max DNL
– 16-Bit NMC Over Temperature
– ±0.5 mV Max Offset Error at 2.7 V
– ±1 mV Max Offset Error at 5 V
• Excellent AC Performance at f_I = 10 kHz with
91 dB SNR, 100 dB SFDR, –96 dB THD
• Built-In Conversion Clock (CCLK)
• 1.65 V to 1.5×(+VA) I/O Supply
– SPI/DSP Compatible Serial
– SCLK up to 50 MHz
• Comprehensive Power-Down Modes:
– Deep Power-Down
– Nap Power-Down
– Auto Nap Power-Down
• Unipolar Input Range: 0 V to V_REF
• Software Reset
• Global CONVST (Independent of CS)
• Programmable Status/Polarity EOC/INT
• 16-Pin 4×4 QFN or 16-Pin TSSOP Packages
• Multi-Chip Daisy Chain Mode
• Programmable TAG Bit Output
• Auto/Manual Channel Select Mode
APPLICATIONS
• Communications
• Transducer Interface
• Medical Instruments
• Magnetometers
• Industrial Process Control
• Data Acquisition Systems
• Automatic Test Equipment
DESCRIPTION
The ADS8327 is a low power, 16-bit, 500-kSPS
analog-to-digital converter with a unipolar input. The
device includes a 16-bit capacitor-based SAR A/D
converter with inherent sample and hold.
The ADS8328 is based on the same core and
includes a 2-to-1 input MUX with programmable
option of TAG bit output. Both the ADS8327 and
ADS8328 offer a high-speed, wide voltage serial
interface and are capable of chain mode operation
when multiple converters are used.
These converters are available in a 16-lead TSSOP
or 4x4 QFN packages and are fully specified for
operation over the industrial –40°C to +85°C
temperature range.
Table 1. Low Power, High-Speed SAR Converter
Family
Type/Speed
16 Bit Pseudo-Diff
Single
Dual
500 kHz
ADS8327
ADS8328
1 MHz
ADS8329
ADS8330
ADS8328 ADS8327
+IN1
NC
+IN0
COM
+IN
−IN
REF+
REF−
SAR
OUTPUT
LATCH
SDO
and
3−STATE
DRIVER
+
_
CDAC
COMPARATOR
CONVERSION
and
CONTROL
FS/CS
SCLK
SDI
OSC
LOGIC
CONVST
EOC/INT/CDI
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.
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.
© 2006–2011, Texas Instruments Incorporated