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ADS7866I Arkusz danych(PDF) 1 Page - Texas Instruments

Numer części ADS7866I
Szczegółowy opis  1.2-V, 12-/10-/8-BIT, 200-KSPS/100-KSPS, MICRO-POWER, MINIATURE ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE
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Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

ADS7866I Arkusz danych(HTML) 1 Page - Texas Instruments

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BurrBrown Products
from Texas Instruments
FEATURES
APPLICATIONS
DESCRIPTION
_
+
CDAC
SAR
Conversion
and
Control
Logic
Comparator
12/10/8 BIT ADC
VIN
REF/VDD
CS
SCLK
SDO
GND
S/H
ADS7866
ADS7867
ADS7868
SLAS465 – JUNE 2005
1.2-V, 12-/10-/8-BIT, 200-KSPS/100-KSPS, MICRO-POWER, MINIATURE
ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE
The sampling, conversion, and activation of digital
output SDO are initiated on the falling edge of CS.
Single 1.2-V to 3.6-V Supply Operation
The serial clock SCLK is used for controlling the
High Throughput
conversion rate and shifting data out of the converter.
Furthermore, SCLK provides a mechanism to allow
– 200/240/280KSPS for 12/10/8-Bit VDD ≥ 1.6 V
digital host processors to synchronize with the con-
– 100/120/140KSPS for 12/10/8-Bit VDD ≥ 1.2 V
verter.
These
converters
interface
with
±1.5LSB INL, 12-Bit NMC (ADS7866)
micro-processors or DSPs through a high-speed SPI
71 dB SNR, –83 dB THD at fIN = 30 kHz
compatible serial interface. There are no pipeline
delays associated with the device.
(ADS7866)
Synchronized Conversion with SCLK
The minimum conversion time is determined by the
frequency of the serial clock input, SCLK, while the
SPI Compatible Serial Interface
maximum frequency of SCLK is determined by the
No Pipeline Delays
minimum sampling time required to charge the input
Low Power
capacitance
to
12/10/8-bit
accuracy
for
the
ADS7866/67/68,
respectively.
The
maximum
– 1.39 mW Typ at 200 KSPS, VDD = 3.6 V
throughput is determined by how often a conversion
– 0.39 mW Typ at 200 KSPS, VDD = 1.6 V
is initiated when the minimum sampling time is met
– 0.22 mW Typ at 100 KSPS, VDD = 1.2 V
and the maximum SCLK frequency is used. Each
Auto Power-Down: 8 nA Typ, 300 nA Max
device automatically powers down after each conver-
sion, which allows each device to save power when
0 V to VDD Unipolar Input Range
the throughput is reduced while using the maximum
6-Pin SOT-23 Package
SCLK frequency.
The converter reference is taken internally from the
supply. Hence, the analog input range for these
Battery Powered Systems
devices is 0 V to VDD.
Isolated Data Acquisition
These devices are available in a 6-pin SOT-23
Medical Instruments
package and are characterized over the industrial
Portable Communication
–40
°C to 85°C temperature range.
Portable Data Acquisition Systems
Automatic Test Equipment
The
ADS7866/67/68
are
low
power,
miniature,
12/10/8-bit A/D converters each with a unipolar,
single-ended input. These devices can operate from a
single 1.6 V to 3.6 V supply with a 200-KSPS
throughput for ADS7866. In addition, these devices
can maintain at least a 100-KSPS throughput with a
supply as low as 1.2 V.
Micro-Power Miniature SAR Converter Family
RESOLUTION/SPEED
< 200 KSPS
1 MSPS – 1.25 MSPS
12-Bit
ADS7866 (1.2 VDD to 3.6 VDD)
ADS7886 (2.35 VDD to 5.25 VDD)
10-Bit
ADS7867 (1.2 VDD to 3.6 VDD)
ADS7887 (2.35 VDD to 5.25 VDD)
8-Bit
ADS7868 (1.2 VDD to 3.6 VDD)
ADS7888 (2.35 VDD to 5.25 VDD)
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.
Copyright © 2005, 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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