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ADS8557IPMR Datenblatt(Datasheet) 1 Page - TI store

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Teile-Nr. ADS8557IPMR
Beschreibung  12-Bit, Six-Channel, Simultaneous Sampling Analog-to-Digital Converters
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Hersteller  TI1 [TI store]
Homepage  http://www.ti.com
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SARADC
String
DAC
2.5V/3V
REF
BUSY/INT
RANGE/XCLK
HW/SW
REF
/WR
RESET
EN
STBY
CS
RD
/
DB[15:0]
WORD/BYTE
PAR/SER
FS
CH_A0
CONVST_A
AGND
REFC_A
REF_IO
AVDD
BVDD
BGND
AGND
HVDD
HVSS
Control
Logic
Config
Register
I/O
SARADC
CH_A1
AGND
SARADC
CH_B0
CONVST_B
AGND
REFC_B
SARADC
CH_B1
AGND
SARADC
CH_C0
CONVST_C
AGND
REFC_C
SARADC
CH_C1
AGND
Clock
Generator
94
92
90
88
86
84
82
80
78
76
74
72
70
-40
-25
-10
5
20
35
50
65
125
Temperature (°C)
80
95
110
ADS8556
ADS8558
ADS8557
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Folder
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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.
ADS8556, ADS8557, ADS8558
SBAS404D – OCTOBER 2006 – REVISED FEBRUARY 2016
ADS855x
16-, 14-, 12-Bit, Six-Channel, Simultaneous Sampling Analog-to-Digital Converters
1
1 Features
1
Family of 16-, 14-, 12-Bit, Pin- and
Software-Compatible ADCs
Six SAR ADCs Grouped in Three Pairs
Maximum Data Rate Per Channel with Internal
Conversion Clock and Reference:
ADS8556: 630 kSPS (PAR) or 450 kSPS (SER)
ADS8557: 670 kSPS (PAR) or 470 kSPS (SER)
ADS8558: 730 kSPS (PAR) or 500 kSPS (SER)
Maximum Data Rate with External Conversion
Clock and Reference:
800 kSPS (PAR) or 530 kSPS (SER)
Pin-Selectable or Programmable Input Voltage
Ranges: Up to ±12 V
Excellent Signal-to-Noise Performance:
ADS8556: 91.5 dB, ADS8667: 85 dB,
ADS8668: 73.9 dB
Programmable and Buffered Internal Reference:
0.5 V to 2.5 V and 0.5 V to 3.0 V
Comprehensive Power-Down Modes:
Deep Power-Down (Standby Mode)
Partial Power-Down
Auto-Nap Power-Down
Selectable Parallel or Serial Interface
Operating Temperature Range: –40°C to 125°C
Block Diagram
2 Applications
Power Quality Measurement
Protection Relays
Multi-Axis Motor Control
Programmable Logic Controllers
Industrial Data Acquisition
3 Description
The ADS855x contains six low-power, 16-, 14-, or 12-
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 ADS855x supports data rates of up to 730 kSPS
in parallel interface mode or up to 500 kSPS 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 ADS855x is specified over the full industrial
temperature range of –40°C to 125°C and is available
in an LQFP-64 package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS8556
LQFP (64)
10.00 mm × 10.00 mm
ADS8557
ADS8558
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
SNR vs Temperature




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