参数资料
型号: LTC2486IDE#TRPBF
厂商: Linear Technology
文件页数: 1/36页
文件大小: 0K
描述: IC ADC 16BIT W/PGA 14-DFN
标准包装: 2,500
位数: 16
采样率(每秒): 15
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-C-ND - BOARD DELTA SIGMA ADC LTC2486
LTC2486
1
2486fd
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-Bit 2-/4-Channel ΔΣ ADC
with PGA and Easy Drive
Input Current Cancellation
The LTC
2486 is a 4-channel (2-channel differential),
16-bit, No Latency ΔΣ 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 LTC2486 includes programmable gain, 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 differential modes) or its internal temperature sen-
sor. It can be programmed to reject line frequencies of 50Hz,
60Hz,orsimultaneous50Hz/60Hz,provideaprogrammable
gain from 1 to 256 in 8 steps, and congured to double its
output rate. The integrated temperature sensor offers 1/2°C
resolution and 2°C absolute accuracy.
The LTC2486 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 of Linear
Technology Corporation. No Latency ΔΣ and Easy Drive are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Data Acquisition System with Temperature Compensation
n Up to 2 Differential or 4 Single-Ended Inputs
n Easy Drive Technology Enables Rail-to-Rail Inputs
with Zero Differential Input Current
n Directly Digitizes High Impedance Sensors with
Full Accuracy
n 600nV RMS Noise
n Programmable Gain from 1 to 256
n Integrated High Accuracy Temperature Sensor
n GND to VCC Input/Reference Common Mode Range
n Programmable 50Hz, 60Hz, or Simultaneous
50Hz/60Hz Rejection Mode
n 2ppm INL, No Missing Codes
n 1ppm Offset and 15ppm Full-Scale Error
n 2x Speed Mode/Reduced Power Mode (15Hz Using
Internal Oscillator and 80μA at 7.5Hz Output)
n No Latency: Digital Filter Settles in a Single Cycle,
Even After a New Channel is Selected
n Single Supply 2.7V to 5.5V Operation (0.8mW)
n Internal Oscillator
n Tiny 4mm × 3mm DFN Package
n Direct Sensor Digitizer
n Direct Temperature Measurement
n Instrumentation
n Industrial Process Control
Absolute Temperature Error
SDI
SCK
SDO
CS
fO
REF+
VCC
2.7V TO 5.5V
10μF
COM
REF
16-BIT ΔΣ ADC
WITH EASY-DRIVE
4-CHANNEL
MUX
TEMPERATURE
SENSOR
IN+
IN
2486 TA01a
4-WIRE
SPI INTERFACE
CH0
CH1
CH3
CH2
0.1μF
OSC
TEMPERATURE (°C)
–55
–30
–5
ABSOLUTE
ERROR
(°C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2486 TA01b
–5
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