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ADS8885IDRCT Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza ADS8885IDRCT
Descripción Electrónicos  18-Bit, 400-kSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

ADS8885IDRCT Datasheet(HTML) 1 Page - Texas Instruments

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GND
REF
ADS8885
AINP
AINM
AVDD
DVDD
DIN
SCLK
DOUT
CONVST
0 V - VREF
VCM
VREF
0 V
0 V
VREF
+VREF
-VREF
VCM
VDIFF
0 V - VREF
2.5 V to 5 V
2.7 V to 3.6 V
Traditional Input Range
ADS8885 Input Range
True-Differential Input Range
VREF/2
1.65 V to 3.6 V
ADS8885
www.ti.com
SBAS568A – MAY 2013 – REVISED DECEMBER 2013
18-Bit, 400-kSPS, Serial Interface, microPower, Miniature,
True-Differential Input, SAR Analog-to-Digital Converter
Check for Samples: ADS8885
1
FEATURES
APPLICATIONS
234
Sample Rate: 400 kHz
Automatic Test Equipment (ATE)
No Latency Output
Instrumentation and Process Controls
Unipolar, True-Differential Input Range:
Precision Medical Equipment
–VREF to +VREF
Low-Power, Battery-Operated Instruments
Wide Common-Mode Voltage Range:
0 V to VREF with 90-dB CMRR (min)
DESCRIPTION
The ADS8885 is an 18-bit, 400-kSPS, true-differential
SPI™-Compatible Serial Interface with
input, analog-to-digital converter (ADC). The device
Daisy-Chain Option
operates with a 2.5-V to 5-V external reference,
Excellent AC and DC Performance:
offering a wide selection of signal ranges without
SNR: 100 dB, THD: –115 dB
additional input signal scaling. The reference voltage
setting is independent of, and can exceed, the analog
INL: ±1.5 LSB (typ), ±3.0 LSB (max)
supply voltage (AVDD).
DNL: +1.5 and –1 LSB (max), 18-Bit NMC
The device offers an SPI-compatible serial interface
Wide Operating Range:
that
also
supports
daisy-chain
operation
for
AVDD: 2.7 V to 3.6 V
cascading
multiple
devices.
An
optional
busy-
DVDD: 1.65 V to 3.6 V
indicator bit makes synchronizing with the digital host
(Independent of AVDD)
easy.
REF: 2.5 V to 5 V (Independent of AVDD)
The device supports unipolar, true-differential analog
Operating Temperature: –40°C to +85°C
input signals with a differential input swing of –VREF to
+VREF. This true-differential analog input structure
Low-Power Dissipation:
allows for a common-mode voltage of any value in
2.6 mW at 400 kSPS
the range of 0 V to +VREF (when both inputs are
0.65 mW at 100 kSPS
within the operating input range of –0.1 V to VREF
+ 0.1 V).
65 µW at 10 kSPS
Power-Down Current (AVDD): 50 nA
Device operation is optimized for very low-power
operation. Power consumption directly scales with
Full-Scale Step Settling to 18 Bits: 1200 ns
speed. This feature makes the ADS8885 excellent for
Packages: MSOP-10 and SON-10
lower-speed applications.
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.
2
TINA is a trademark of Texas Instruments Inc..
3
SPI is a trademark of Motorola Inc.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013, Texas Instruments Incorporated
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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