ADS8864_14 Datasheet, PDF (1/46 Pages) Texas Instruments – 16-Bit, 400-kSPS, Serial Interface, microPower, Miniature, Single-Ended Input, SAR Analog-to-Digital Converter

ADS8864
www.ti.com
SBAS572A – MAY 2013 – REVISED DECEMBER 2013
16-Bit, 400-kSPS, Serial Interface, microPower, Miniature,
Single-Ended Input, SAR Analog-to-Digital Converter
Check for Samples: ADS8864
FEATURES
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•234 Sample Rate: 400 kHz
• No Latency Output
• Unipolar, Single-Ended Input Range:
0 to +V_REF
• SPI™-Compatible Serial Interface with
Daisy-Chain Option
• Excellent AC and DC Performance:
– SNR: 93 dB, THD: –108 dB
– INL: ±1.0 LSB (typ), ±2.0 LSB (max)
– DNL: ±1.0 LSB (max), 16-Bit NMC
• Wide Operating Range:
– AVDD: 2.7 V to 3.6 V
– DVDD: 1.65 V to 3.6 V
(Independent of AVDD)
– REF: 2.5 V to 5 V (Independent of AVDD)
– Operating Temperature: –40°C to +85°C
• Low-Power Dissipation:
– 2.6 mW at 400 kSPS
– 0.65 mW at 100 kSPS
– 65 µW at 10 kSPS
• Power-Down Current (AVDD): 50 nA
• Full-Scale Step Settling to 16 Bits: 1200 ns
• Packages: MSOP-10 and SON-10
APPLICATIONS
• Automatic Test Equipment (ATE)
• Instrumentation and Process Controls
• Precision Medical Equipment
• Low-Power, Battery-Operated Instruments
DESCRIPTION
The ADS8864 is a 16-bit, 400-kSPS, single-ended
input, analog-to-digital converter (ADC). The device
operates with a 2.5-V to 5-V external reference,
offering a wide selection of signal ranges without
additional input signal scaling. The reference voltage
setting is independent of, and can exceed, the analog
supply voltage (AVDD).
The device offers an SPI-compatible serial interface
that also supports daisy-chain operation for
cascading multiple devices. An optional busy-
indicator bit makes synchronizing with the digital host
easy.
The device supports unipolar single-ended analog
inputs in the range of –0.1 V to V_REF + 0.1 V.
Device operation is optimized for very low-power
operation. Power consumption directly scales with
speed. This feature makes the ADS8864 excellent for
lower-speed applications.
2.5 V to 5 V
No separate LDO Required _{2.7 V to 3.6 V}
for ADC supply
0 V - VREF
REF
AVDD DVDD
AINP
AINM
ADS8864
DIN
SCLK
DOUT
CONVST
GND
Digital Host
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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.
TINA is a trademark of Texas Instruments Inc..
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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 © 2013, Texas Instruments Incorporated