参数资料
型号: LTC2497IUHF#PBF
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC ADC 16BIT W/PGA 38-QFN
标准包装: 52
位数: 16
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
配用: DC1012A-B-ND - BOARD DELTA SIGMA ADC LTC2497
LTC2497
2497fa
RSOURCE ( )
1
+FS
ERROR
(ppm)
–20
0
20
1k
100k
2497 TA01b
–40
–60
–80
10
100
10k
40
60
80
VCC = 5V
VREF = 5V
VIN+ = 3.75V
VIN– = 1.25V
fO = GND
TA = 25°C
CIN = 1mF
16-Bit 8-/16-Channel
DS ADC with Easy Drive Input Current
Cancellation and I2C Interface
Typical applicaTion
FeaTures
applicaTions
DescripTion
The LTC2497 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.
The LTC2497 includes an integrated oscillator. This device
canbeconfiguredtomeasureanexternalsignalfromcom-
binations of 16 analog input channels operating in single-
ended or differential modes. It automatically rejects line
frequencies of 50Hz and 60Hz simultaneously.
The LTC2497 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 enables
optional external amplifiers to be shared between all
analog inputs and auto calibration continuously removes
their associated offset and drift.
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.
Easy Drive Data Acquisition System
n
Up to Eight Differential or 16 Single-Ended Inputs
n
Easy DriveTM 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 (0.02LSB Transition Noise)
n
GND to VCC Input/Reference Common Mode Range
n
Simultaneous 50Hz/60Hz Rejection
n
2ppm INL, No Missing Codes
n
1ppm Offset and 15ppm Full-Scale Error
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
+FS Error vs RSOURCE at IN+ and IN
SCL
SDA
fO
REF+
VCC
MUXOUT/
ADCIN
MUXOUT/
ADCIN
2.7V TO 5.5V
10F
1.7k
COM
REF
16-BIT ∑ ADC
WITH EASY DRIVE
16-CHANNEL
MUX
IN+
IN
2497 TA01
2-WIRE
I2C INTERFACE
CH0
CH1
CH7
CH8
CH15
0.1F
OSC
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