ADS8555_14 Datasheet, PDF (1/37 Pages) Texas Instruments – 16-Bit, Six-Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

ADS8555
www.ti.com
SBAS531B – DECEMBER 2010 – REVISED FEBRUARY 2011
16-Bit, Six-Channel, Simultaneous Sampling
ANALOG-TO-DIGITAL CONVERTER
Check for Samples: ADS8555
FEATURES
1
•2 Six SAR ADCs Grouped in Three Pairs
• Maximum Data Rate Per Channel with Internal
Clock and Reference:
630kSPS (Parallel) or 450kSPS (Serial)
• Maximum Data Rate Per Channel with External
Clock and Reference:
800kSPS (Parallel) or 500kSPS (Serial)
• Pin-Selectable or Programmable Input Voltage
Ranges: Up to ±12V
• Excellent AC Performance:
91.5dB SNR, –94dB THD
• Programmable and Buffered Internal
Reference: 0.5V to 2.5V and 0.5V to 3.0V
• Comprehensive Power-Down Modes:
Deep Power-Down (Standby Mode)
Auto-Nap Power-Down
• Selectable Parallel or Serial Interface
• Operating Temperature Range:
–40°C to +125°C
• LQFP-64 Package
APPLICATIONS
• Power Quality Measurement
• Protection Relays
• Multi-Axis Motor Control
• Programmable Logic Controllers
• Industrial Data Acquisition
DESCRIPTION
The ADS8555 contains six low-power, 16-bit,
successive approximation register (SAR)-based
analog-to-digital converters (ADCs) with true bipolar
inputs. Each channel contains a sample-and-hold
circuit that allows simultaneous high-speed
multi-channel signal acquisition.
The ADS8555 supports data rates of up to 630kSPS
in parallel interface mode or up to 450kSPS if the
serial interface is used. The bus width of the parallel
interface can be set to eight or 16 bits. In serial
mode, up to three output channels can be activated.
The ADS8555 is specified over the extended
industrial temperature range of –40°C to +125°C and
is available in an LQFP-64 package.
CH_A0
AGND
CONVST_A
REFC_A
CH_A1
AGND
CH_B0
AGND
CONVST_B
REFC_B
CH_B1
AGND
CH_C0
AGND
CONVST_C
REFC_C
CH_C1
AGND
HVDD HVSS AVDD
Clock
Generator
SAR ADC
SAR ADC
SAR ADC
SAR ADC
SAR ADC
SAR ADC
BVDD
Control
Logic
Config
Register
BUSY/INT
RANGE/XCLK
HW/SW
REF_EN/WR
STBY
RESET
CS/FS
RD
I/O
DB[15:0]
WORD/BYTE
PAR/SER
REF_IO
String
DAC
2.5V/3V
REF
AGND
BGND
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
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.
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