Interface ADC. ADS7955-Q1 Datasheet

ADS7955-Q1 ADC. Datasheet pdf. Equivalent

Part ADS7955-Q1
Description Serial Interface ADC
Feature ADS7955-Q1 www.ti.com SLAS814 – DECEMBER 2011 10-Bit, 1 MSPS, 8-Channel, Single-Ended, MicroPower.
Manufacture etcTI
Datasheet
Download ADS7955-Q1 Datasheet

ADS7955-Q1 www.ti.com SLAS814 – DECEMBER 2011 10-Bit, 1 M ADS7955-Q1 Datasheet
Recommendation Recommendation Datasheet ADS7955-Q1 Datasheet





ADS7955-Q1
ADS7955-Q1
www.ti.com
SLAS814 DECEMBER 2011
10-Bit, 1 MSPS, 8-Channel, Single-Ended, MicroPower, Serial Interface ADC
Check for Samples: ADS7955-Q1
FEATURES
1
Qualified for Automotive Applications
1-MHz Sample Rate Serial Devices
10-Bit Resolution
Zero Latency
20-MHz Serial Interface
Analog Supply Range: 2.7 to 5.25 V
I/O Supply Range: 1.7 to 5.25 V
Two SW Selectable Unipolar, Input Ranges: 0
to 2.5V and 0 to 5V
Auto and Manual Modes for Channel Selection
8-Channel Device can Share 16 Channel
Device Footprint
Two Programmable Alarm Levels per Channel
Four Individually Configurable GPIOs for
TSSOP Package Devices
Typical Power Dissipation: 14.5 mW (+VA = 5
V, +VBD = 3 V) at 1 MSPS
Power-Down Current (1 μA)
Input Bandwidth (47 MHz at 3 dB)
30-Pin TSSOP Package
APPLICATIONS
PLC / IPC
Battery Powered Systems
Medical Instrumentation
Digital Power Supplies
Touch Screen Controllers
High-Speed Data Acquisition Systems
High-Speed Closed-Loop Systems
DESCRIPTION
The ADS7955-Q1 is a
analog-to-digital converter.
10-bit
multichannel
The device includes a capacitor based SAR A/D
converter with inherent sample and hold.
The device accepts a wide analog supply range from
2.7V to 5.25V. Very low power consumption makes
this device suitable for battery-powered and isolated
power supply applications.
A wide 1.7V to 5.25V I/O supply range facilitates a
glue-less interface with the most commonly used
CMOS digital hosts.
The serial interface is controlled by CS and SCLK for
easy connection with microprocessors and DSP.
The input signal is sampled with the falling edge of
CS. It uses SCLK for conversion, serial data output,
and reading serial data in. The device allows auto
sequencing of preselected channels or manual
selection of a channel for the next conversion cycle.
There are two software selectable input ranges (0V -
2.5V and 0V - 5V), four individually configurable
GPIOs, and two programmable alarm thresholds per
channel. These features make the device suitable for
most data acquisition applications.
The device offers an attractive power-down feature.
This is extremely useful for power saving when the
device is operated at lower conversion speeds.
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.
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 © 2011, Texas Instruments Incorporated



ADS7955-Q1
ADS7955-Q1
SLAS814 DECEMBER 2011
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ADS7955-Q1 BLOCK DIAGRAM
MXO AINP
REF +VA AGND
Ch0
Ch1
ADC
SDO
Ch2
Compare
Alarm
Threshold
Ch n*
Control Logic
&
Sequencing
SDI
SCLK
CS
GPIO BDGND VBD
NOTE: n* is number of channels (16,12,8, or 4) depending on the device from the ADS79XX product family.
NOTE: 4 number of GPIO are available in TSSOP package device.
TA
40°C to 125°C
MAXIMUM
INTEGRAL
LINEARITY
(LSB)
±0.5
ORDERING INFORMATION - 10-BIT
MAXIMUM
DIFFERENTIAL
LINEARITY (LSB)
NO MISSING
CODES AT
RESOLUTION
(BIT)
NUMBER OF
CHANNELS
PACKAGE
±0.5
10
8
30 pin TSSOP - DBT
ORDERABLE PART
NUMBER
ADS7955QDBTRQ1
TOP-SIDE MARKING
ADS7955Q1
ABSOLUTE MAXIMUM RATINGS(1)
AINP or CHn to AGND
+VA to AGND, +VBD to BDGND
Digital input voltage to BDGND
Digital output to BDGND
Operating temperature range
Storage temperature range
Junction temperature
Power dissipation
DBT packaged versions rated for MSL3 260C per JSTD-020 specifications
Human Body Model (HBM) ESD, Class H2 per Q100-002
Machine Model (MM) ESD, Class M2 per Q100-003
Charged Device Model (CDM) ESD, Class C3B2 per Q100-011
Latch up (per JESD78)
VALUE
0.3 to +VA +0.3
0.3 to +7.0
0.3 to (7.0)
0.3 to (+VA + 0.3)
40 to 125
65 to 150
150
(TJ MaxTA)/θJA
2
200
Maximum withstand voltage > 500 to to 750 V
with corner pins > 750
Class I
UNIT
V
V
V
V
°C
°C
°C
kV
V
V
(1) Stresses above those listed under Absolute Maximum Ratingsmay cause permanent damage to the device. Exposure to absolute
maximum conditions for extended periods may affect device reliability.
2
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Product Folder Link(s): ADS7955-Q1
Copyright © 2011, Texas Instruments Incorporated





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