- 您现在的位置：买卖IC网 > PDF目录10330 > LTC2497IUHF#PBF (Linear Technology)IC ADC 16BIT W/PGA 38-QFN PDF资料下载
参数资料
| 型号： | LTC2497IUHF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/28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 |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
LTC2497
2497fa
common mode reference (see the Automatic Differential
Input Current Cancellation section). This unique architec-
ture does not require on-chip buffers, thereby enabling
signals to swing beyond ground and VCC. Moreover, the
cancellation does not interfere with the transparent offset
and full-scale auto-calibration and the absolute accuracy
(full scale + offset + linearity + drift) is maintained even
with external RC networks.
Power-Up Sequence
The LTC2497 automatically enters an internal reset state
when the power supply voltage VCC drops below approxi-
mately 2.0V. This feature guarantees the integrity of the
conversion result and input channel selection.
WhenVCCrisesabovethisthreshold,theconvertercreates
an internal power-on-reset (POR) signal with a duration
of approximately 4ms. The POR signal clears all internal
registers. The conversion immediately following a POR
cycle is performed on the input channel IN+ = CH0, IN– =
CH1.ThefirstconversionfollowingaPORcycleisaccurate
within the specification of the device if the power supply
voltage is restored to (2.7V to 5.5V) before the end of the
POR interval. A new input channel can be programmed
into the device during this first data input/output cycle.
Reference Voltage Range
Thisconverteracceptsatrulydifferential,externalreference
voltage. The absolute/common mode voltage range for
REF+ and REF– pins covers the entire operating range of
the device (GND to VCC). For correct converter operation,
VREF must be positive (REF+ > REF–).
The LTC2497 differential reference input range is 0.1V to
VCC.Forthesimplestoperation,REF+canbeshortedtoVCC
andREF–canbeshortedtoGND.Theconverteroutputnoise
isdeterminedbythethermalnoiseofthefrontendcircuits.
Since the transition noise is well below 1LSB (0.02LSB), a
decrease in reference voltage will proportionally improve
the converter resolution and improve INL.
Input Voltage Range
The analog inputs are truly differential with an absolute,
common mode range for the CH0-CH15 and COM input
pins extending from GND – 0.3V to VCC + 0.3V. Within
these limits, the LTC2497 converts the bipolar differen-
tial input signal VIN = IN+ – IN– (where IN+ and IN– are
the selected input channels), from – FS = – 0.5 VREF
to + FS = 0.5 VREF where VREF = REF+ - REF–. Outside
this range, the converter indicates the overrange or the
underrange condition using distinct output codes (see
Table 1).
Signals applied to the input (CH0-CH15, COM) may extend
300mV below ground and above VCC. In order to limit
any fault current due to input ESD leakage current, resis-
tors of up to 5k may be added in series with the input.
The effect of series resistance on the converter accuracy
can be evaluated from the curves presented in the Input
Current/Reference Current sections. In addition, series
resistorswillintroduceatemperaturedependenterrordue
to input leakage current. A 1nA input leakage current will
develop a 1ppm offset error on a 5k resistor if VREF = 5V.
This error has a very strong temperature dependency.
MUXOUT/ADCIN
Theoutputsofthemultiplexer(MUXOUTP/MUXOUTN)and
the inputs to the ADC (ADCINP/ADCINN) can be used to
perform input signal conditioning on any of the selected
input channels or simply shorted together for direct
digitization. If an external amplifier is used, the LTC2497
automatically calibrates both the offset and drift of this
circuit and the Easy Drive sampling scheme enables a
wide variety of amplifiers to be used.
In order to achieve optimum performance, if an external
amplifier is not used, short these pins directly together
(ADCINP to MUXOUTP and ADCINN to MUXOUTN) and
minimize their capacitance to ground.
applicaTions inForMaTion
相关PDF资料 |
PDF描述 |
|---|---|
| MS3106R20-16P | CONN PLUG 9POS STRAIGHT W/PINS |
| D38999/26FG39SNLC | CONN HSG PLUG 39POS STRGHT SCKT |
| LTC2435CGN#PBF | IC ADC DIFF I/REF 20BIT 16-SSOP |
| LTC2435CGN | IC ADC DIFF I/REF 20BIT 16-SSOP |
| MS27473E14F15S | CONN PLUG 15POS STRAIGHT W/SCKT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2498CUHF | 制造商:Linear Technology 功能描述:ADC Single Delta-Sigma 7.5sps 24-bit Serial 38-Pin QFN EP |
| LTC2498CUHF#PBF | 功能描述:IC ADC 24BIT 16CH 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| LTC2498CUHF#TRPBF | 功能描述:IC ADC 24BIT 16CH 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC2498HUHF#PBF | 功能描述:IC ADC 24BIT 16CH DELTA 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC2498HUHF#TRPBF | 功能描述:IC ADC 24BIT 16CH DELTA 38-QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
发布紧急采购，3分钟左右您将得到回复。