参数资料
型号: LTC2499IUHF#PBF
厂商: Linear Technology
文件页数: 1/34页
文件大小: 0K
描述: IC ADC 24BIT DELTA SIG 38-QFN
标准包装: 52
位数: 24
采样率(每秒): 7.5
数据接口: I²C,串行
转换器数目: 1
功率耗散(最大): 480µW
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: 38-WFQFN 裸露焊盘
供应商设备封装: 38-QFN(5x7)
包装: 管件
输入数目和类型: 16 个单端,双极;8 个差分,双极
产品目录页面: 1348 (CN2011-ZH PDF)
配用: DC1012A-A-ND - BOARD DELTA SIGMA ADC LTC2499
LTC2499
2499fd
Features
applications
Description
24-Bit 8-/16-Channel
DS ADC with Easy Drive Input Current
Cancellation and I2C Interface
The LTC2499 is a 16-channel (eight differential), 24-bit,
No Latency
DS 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.
The LTC2499 includes a high accuracy, temperature
sensor and an integrated oscillator. This device can be
configured to measure an external signal (from combi-
nations of 16 analog input channels operating in single-
ended or differential modes) or its internal temperature
sensor.Theintegratedtemperaturesensoroffers1/30th°C
resolution and 2°C absolute accuracy.
The LTC2499 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
n
Up to Eight Differential or 16 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
2-Wire I2C Interface with 27 Addresses Plus One
Global Address for Synchronization
n
600nV RMS Noise
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/Reduced Power Mode (15Hz Using Internal
Oscillator and 80A 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 5mm
× 7mm QFN Package
n
Direct Sensor Digitizer
n
Direct Temperature Measurement
n
Instrumentation
n
Industrial Process Control
Integrated High Performance Temperature Sensor
typical application
SCL
SDA
fO
REF+
VCC
MUXOUT/
ADCIN
MUXOUT/
ADCIN
2.7V TO 5.5V
0.1F
1.7k
COM
REF
24-BIT
ADC
WITH EASY DRIVE
16-CHANNEL
MUX
TEMPERATURE
SENSOR
IN+
IN
2499 TA01
2-WIRE
I2C INTERFACE
CH0
CH1
CH7
CH8
CH15
10F
OSC
TEMPERATURE (°C)
–55 –30
–5
ABSOLUTE
ERROR
(°C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95
70
45
20
2499 TA02
–5
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No Latency ∑ and Easy Drive are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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