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ADS8912BRGET Arkusz danych(PDF) 1 Page - Texas Instruments

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Numer części ADS8912BRGET
Szczegółowy opis  ADS891xB 18-Bit, High-Speed SAR ADCs With Integrated Reference Buffer, Integrated LDO, and multiSPI??Digital Interface
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Strona internetowa  http://www.ti.com
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ADS8912BRGET Arkusz danych(HTML) 1 Page - Texas Instruments

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ADC
LDO
BUF
AVDD
ADS89xxB
OPA2625
ADC
LDO
BUF
AVDD
ADS89xxB
OPA2625
REF5050
VIN
VOUT
GND
AVDD
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
ADS8910B
ADS8912B
ADS8914B
SBAS707A – JUNE 2016 – REVISED JULY 2016
ADS891xB 18-Bit, High-Speed SAR ADCs With Integrated Reference Buffer,
Integrated LDO, and multiSPI™ Digital Interface
1
1 Features
1
Resolution: 18-bit
High Sample Rate With No Latency Output:
ADS8910B : 1 MSPS
ADS8912B : 500 kSPS
ADS8914B : 250 kSPS
Integrated LDO Enables Single-Supply Operation
Burst-Mode Operation With Precise First Sample
Excellent AC and DC Performance:
SNR: 102.5 dB, THD: –125 dB
INL: ±0.5 LSB (Typ), ±1.5 LSB (Max)
DNL: ±0.5 LSB (Max), 18-Bit NMC
Wide Input Range:
Unipolar Differential Input Range: ±VREF
VREF Input Range: 2.5 V to 5 V
Single-Supply, Low-Power Operation
(Includes Internal Reference Buffer and LDO)
ADS8910B : 21 mW at 1 MSPS
ADS8912B : 16 mW at 500 kSPS
ADS8914B : 14 mW at 250 kSPS
multiSPI™ Digital Interface
Extended Temperature Range: –40°C to +125°C
Small Footprint: 4-mm × 4-mm VQFN
2 Applications
Test and Measurement
Medical Imaging
High-Precision, High-Speed Data Acquisition
3 Description
The
ADS8910B,
ADS8912B,
and
ADS8914B
(ADS891xB)
belong
to
a
family
of
pin-to-pin
compatible, high-speed, high-precision successive
approximation register (SAR) based analog-to-digital
convertors (ADCs) with an integrated reference buffer
and integrated low-dropout regulator (LDO). These
devices support unipolar, fully differential, analog
input signals with ±0.5-LSB INL and 102.5-dB SNR
specifications under typical operating conditions.
The integrated LDO enables single-supply operation
with
low
power
consumption.
The
integrated
reference buffer supports burst-mode data acquisition
with 18-bit precision for the first sample. External
reference voltages in the range 2.5 V to 5 V are
supported, offering a wide selection of input ranges
without additional input scaling.
The integrated multiSPI digital interface is backward-
compatible
to
the
traditional
SPI
protocol.
Additionally, configurable features simplify board
layout, timing, and firmware, and support high
throughput at lower clock speeds. The multiSPI digital
interface allows for easy interface with a variety of
microcontrollers, digital signal processors (DSPs),
and field-programmable gate arrays (FPGAs).
The ADS891xB family is offered in a space-saving,
4-mm × 4-mm, VQFN package, and is specified over
the extended temperature range of –40°C to +125°C.
Device Information
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS891xB
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Multiple-ADC Design


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