参数资料
型号: LTC2492IDE#TRPBF
厂商: Linear Technology
文件页数: 1/36页
文件大小: 0K
描述: IC ADC 24BIT DELTA SIG 14-DFN
标准包装: 2,500
位数: 24
采样率(每秒): 7.5
数据接口: MICROWIRE?,串行,SPI?
转换器数目: 1
功率耗散(最大): 800µW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 14-WFDFN 裸露焊盘
供应商设备封装: 14-DFN-EP(4x3)
包装: 带卷 (TR)
输入数目和类型: 4 个单端,双极;2 个差分,双极
配用: DC1009A-A-ND - BOARD DELTA SIGMA ADC LTC2492
LTC2492
1
2492fd
TEMPERATURE (°C)
–55
–30
– 5
ABSOLUTE
ERROR
(°C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2492 TA01b
–5
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
24-Bit 2-/4-Channel
ΔΣ
ADC with Easy Drive Input
Current Cancellation
The LTC2492 is a 4-channel (2-channel differential),
24-bit, No Latency Δ∑ ADC with Easy Drive technology.
The patented sampling scheme eliminates 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 LTC2492 includes a high accuracy temperature sensor
and an integrated oscillator. This device can be congured
to measure an external signal (from combinations of 4
analog input channels operating in single-ended or dif-
ferential modes) or its internal temperature sensor. It can
be programmed to reject line frequencies of 50Hz, 60Hz,
or simultaneous 50Hz/60Hz and congured to double
its output rate. The integrated temperature sensor offers
1/30th°C resolution and 2°C absolute accuracy.
The LTC2492 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 rst conversion after a new channel
selection is valid.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Easy Drive and No Latency
ΔΣ are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Data Acquisition System with Temperature Compensation
Up to 2 Differential or 4 Single-Ended Inputs
Easy Drive Technology Enables Rail-to-Rail
Inputs with Zero Differential Input Current
Directly Digitizes High Impedance Sensors with
Full Accuracy
600nVRMS Noise
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 Mode/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 DFN 4mm
× 3mm Package
Direct Sensor Digitizer
Direct Temperature Measurement
Instrumentation
Industrial Process Control
Absolute Temperature Error
SDI
SCK
SDO
CS
fO
REF+
VCC
2.7V TO 5.5V
10μF
COM
REF
24-BIT Δ∑ ADC
WITH EASY-DRIVE
4-CHANNEL
MUX
TEMPERATURE
SENSOR
IN+
IN
2492 TA01a
4-WIRE
SPI INTERFACE
CH0
CH1
CH3
CH2
0.1μF
OSC
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