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DDC232CGXGR Datasheet(数据表) 1 Page - Texas Instruments

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部件型号  DDC232CGXGR
说明  32-Channel, Current-Input Analog-to-Digital Converter
下载  34 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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DDC232CGXGR Datasheet(HTML) 1 Page - Texas Instruments

 
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Serial
Interface
DVALID
DCLK
DOUT
DIN
Configuration
and
Control
IN2
IN1
DGND
AGND
IN4
IN3
IN30
IN29
DS
ADC
IN32
IN31
CLK
CONV
DIN_CFG
CLK_CFG
RESET
Dual
Switched
Integrator
Dual
Switched
Integrator
Dual
Switched
Integrator
Dual
Switched
Integrator
Dual
Switched
Integrator
Dual
Switched
Integrator
Dual
Switched
Integrator
Dual
Switched
Integrator
VREF
DVDD
AVDD
0.1 F
m
0.1 F
m
0.1 F
m
DS
ADC
DS
ADC
DS
ADC
DDC232
www.ti.com
SBAS331D – AUGUST 2004 – REVISED APRIL 2010
32-Channel, Current-Input
Analog-to-Digital Converter
Check for Samples: DDC232
The DDC232 uses a +5V analog supply and a +2.7V
1
FEATURES
to
+3.6V
digital
supply.
Operating
over
the
2
Single-Chip Solution to Directly Measure 32
temperature range of 0°C to +70°C, the DDC232
Low-Level Currents
BGA-64 package is offered in two versions: the
High-Precision, True Integrating Function
DDC232C
for
low-power
applications,
and
the
DDC232CK when higher speeds are required.
Integral Linearity:
±0.025% of Reading ±1.0ppm of FSR
Very Low Noise: 5.3ppm of FSR
Low Power: 7mW/channel
Adjustable Full-Scale Range
Adjustable Speed
Data Rate up to 6kSPS
Integration Times as low as 166.5ms
Daisy-Chainable Serial Interface
In-Package Bypass Capacitors Simplify PCB
Design
APPLICATIONS
CT Scanner DAS
Photodiode Sensors
X-Ray Detection Systems
DESCRIPTION
The DDC232 is a 20-bit, 32-channel, current-input
analog-to-digital (A/D) converter. It combines both
current-to-voltage and A/D conversion so that 32
separate low-level current output devices, such as
photodiodes, can be directly connected to its inputs
and digitized.
For each of the 32 inputs, the DDC232 provides a
dual-switched integrator front-end. This configuration
allows for continuous current integration: while one
integrator is being digitized by the onboard A/D
converter, the other is integrating the input current.
Adjustable integration times range from 166ms to 1s,
allowing currents from fAs to mAs to be continuously
measured with outstanding precision.
Protected by US Patent #5841310
The DDC232 has a serial interface designed for
daisy-chaining
in
multi-device
systems.
Simply
connect the output of one device to the input of the
next to create the chain. Common clocking feeds all
the devices in the chain so that the digital overhead
in a multi-DDC232 system is minimal.
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
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2010, 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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