參數(shù)資料
型號(hào)： LTC2495CUHF#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38
封裝： 5 X 7 MM, PLASTIC, MO-220WKHD, QFN-38
文件頁數(shù)： 1/32頁
文件大?。?/td> 619K
代理商： LTC2495CUHF#TR
LTC2495
2495fa
Typical applicaTion
FeaTures
applicaTions
DescripTion
16-Bit 8-/16-Channel
DS ADC with PGA, Easy Drive
and I2C Interface
The LTC2495 is a 16-channel (eight differential), 16-bit,
No Latency
DSTM ADC with Easy Drive technology and a
2-wire,I2Cinterface.Thepatentedsamplingschemeelimi-
nates dynamic input current errors and the shortcomings
of on-chip buffering through automatic cancellation of
differential input current. This allows large external source
impedances and rail-to-rail input signals to be directly
digitized while maintaining exceptional DC accuracy.
TheLTC2495includesprogrammablegain,ahighaccuracy
temperaturesensor,andanintegratedoscillator.Thisdevice
canbeconfiguredtomeasureanexternalsignal(fromcom-
binations of 16 analog input channels operating in single-
ended or differential modes) or its internal temperature
sensor. The integrated temperature sensor offers 1/2°C
resolution and 2°C absolute accuracy. The LTC2495 can
be configured to provide a programmable gain from 1 to
256 in 8 steps.
The LTC2495 allows a wide common mode input range
(0V to VCC), independent of the reference voltage. Any
combination of single-ended or differential inputs can
be selected and the first conversion, after a new channel
is selected, is valid. Access to the multiplexer output en-
ables optional external amplifiers to be shared between all
analog inputs and auto calibration continuously removes
their associated offset and drift.
Data Acquisition System with Temperature Compensation
■
Up to Eight Differential or 16 Single-Ended Inputs
■
Easy DriveTM Technology Enables Rail-to-Rail
Inputs with Zero Differential Input Current
■
Directly Digitizes High Impedance Sensors with
Full Accuracy
■
2-Wire I2C Interface with 27 Addresses Plus One
Global Address for Synchronization
■
600nV RMS Noise
■
Programmable Gain from 1 to 256
■
Integrated High Accuracy Temperature Sensor
■
GND to VCC Input/Reference Common Mode Range
■
Programmable 50Hz, 60Hz, or Simultaneous 50Hz/
60Hz Rejection Mode
■
2ppm INL, No Missing Codes
■
1ppm Offset and 15ppm Full-Scale Error
■
2x Speed/Reduced Power Mode (15Hz Using Internal
Oscillator and 80A at 7.5Hz Output)
■
No Latency: Digital Filter Settles in a Single Cycle,
Even After a New Channel is Selected
■
Single Supply 2.7V to 5.5V Operation (0.8mW)
■
Internal Oscillator
■
Tiny 5mm
× 7mm QFN Package
■
Direct Sensor Digitizer
■
Direct Temperature Measurement
■
Instrumentation
■
Industrial Process Control
Built-In High Performance Temperature Sensor
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No Latency
DS and Easy Drive are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
SCL
SDA
FO
REF+
VCC
MUXOUT/
ADCIN
MUXOUT/
ADCIN
2.7V TO 5.5V
10
F
1.7k
COM
REF–
16-BIT
Σ ADC
WITH EASY DRIVE
16-CHANNEL
MUX
TEMPERATURE
SENSOR
IN+
IN–
2495 TA01
2-WIRE
I2C INTERFACE
CH0
CH1
CH7
CH8
CH15
0.1
F
OSC
TEMPERATURE (
°C)
–55 –30
–5
ABSOLUTE
ERROR
(°
C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2495 TA02
–5
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