參數(shù)資料
型號(hào)： LTC2493IDEPBF
廠商： Linear Technology Corporation
英文描述： 24-Bit 2-/4-Channel ADC with Easy Drive Input Current Cancellation and I2C Interface
中文描述： 24位2-/4-Channel ADC，具有易于驅(qū)動(dòng)的輸入電流取消和I2C接口
文件頁數(shù)： 1/32頁
文件大?。?/td> 588K
代理商： LTC2493IDEPBF
LTC2493
2493fa
Typical applicaTion
Data Acquisition System with Temperature Compensation
FeaTures
applicaTions
DescripTion
24-Bit 2-/4-Channel
DS
ADC with Easy Drive Input Current
Cancellation and I
2
C Interface
The LTC
2493 is a 4-channel (2-channel differential), 24-bit,
No Latency
DS
TM
ADC with Easy Drive technology and a
2-wire, I
2
C interface. The patented sampling scheme elimi-
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.
The LTC2493 includes a high accuracy temperature
sensor and an integrated oscillator. This device can be
configured to measure an external signal (from combi-
nations of 4 analog input channels operating in single-
ended or differential modes) or its internal temperature
sensor. The integrated temperature sensor offers 1/30th
°C resolution and 2°C absolute accuracy.
The LTC2493 allows a wide common mode input range
(0V to V
CC
), 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.
■
Up to 2 Differential or 4 Single-Ended Inputs
■
Easy Drive
TM
Technology Enables Rail-to-Rail
Inputs with Zero Differential Input Current
■
Directly Digitizes High Impedance Sensors with
Full Accuracy
■
2-Wire I
2
C Interface with 9 Addresses Plus One
Global Address for Synchronization
■
600nV RMS Noise
■
Integrated High Accuracy Temperature Sensor
■
GND to V
CC
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 80μA 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 4mm
×
3mm DFN Package
■
Direct Sensor Digitizer
■
Direct Temperature Measurement
■
Instrumentation
■
Industrial Process Control
TEMPERATURE
SENSOR
SDA
SCL
F
O
REF
+
V
CC
2.7V TO 5.5V
0.1
μ
F
COM
REF
–
24-BIT
Σ
ADC
WITH EASY-DRIVE
4-CHANNEL
MUX
IN
+
IN
–
2493 vTA01a
2-WIRE
I
C INTERFACE
1.7k
CA1
CA0
9-PIN SELECTABLE
ADDRESSES
CH0
CH1
CH3
CH2
10
μ
F
OSC
Integrated High Performance Temperature Sensor
TEMPERATURE (
°
C)
–55
–30
–5
A
°
C
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2493 TA02
–5
, 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.
相關(guān)PDF資料
PDF描述
LTC2493IDETRPBF 24-Bit 2-/4-Channel ADC with Easy Drive Input Current Cancellation and I2C Interface
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