参数资料
型号: LTC2499IUHF#PBF
厂商: Linear Technology
文件页数: 24/34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
0
2499fd
Usingthe2XspeedmodeoftheLTC2499alterstherejection
characteristics around DC and multiples of fS. The device
bypassestheoffsetcalibrationinordertoincreasetheoutput
rate. The resulting rejection plots are shown in Figures 27
and 28. 1x type frequency rejection can be achieved us-
ing the 2x mode by performing a running average of the
previous two conversion results (see Figure 29).
Output Data Rate
When using its internal oscillator, the LTC2499 produces
up to 7.5 samples per second (sps) with a notch frequency
of60Hz.Theactualoutputdataratedependsuponthelength
of the sleep and data output cycles which are controlled
by the user and can be made insignificantly short. When
operating with an external conversion clock (fO connected
to an external oscillator), the LTC2499 output data rate
can be increased. The duration of the conversion cycle is
41036/fEOSC. If fEOSC = 307.2kHz, the converter behaves
as if the internal oscillator is used.
An increase in fEOSC over the nominal 307.2kHz will trans-
late into a proportional increase in the maximum output
data rate (up to a maximum of 100sps). The increase in
output rate leads to degradation in offset, full-scale error,
and effective resolution as well as a shift in frequency
rejection. When using the integrated temperature sensor,
the internal oscillator should be used or an external oscil-
lator fEOSC = 307.2kHz maximum.
A change in fEOSC results in a proportional change in the
internal notch position. This leads to reduced differential
mode rejection of line frequencies. The common mode
rejectionoflinefrequenciesremainsunchanged,thusfully
differential input signals with a high degree of symmetry
on both the IN+ and INpins will continue to reject line
frequency noise.
An increase in fEOSC also increases the effective dynamic
input and reference current. External RC networks will
continue to have zero differential input current, but the
time required for complete settling (580ns for fEOSC =
307.2kHz) is reduced, proportionally.
Once the external oscillator frequency is increased above
1MHz(amorethan3xincreaseinoutputrate)theeffective-
ness of internal auto calibration circuits begins to degrade.
This results in larger offset errors, full-scale errors, and
decreased resolution, as seen in Figures 30-37.
Figure 27. Input Normal Mode Rejection 2x Speed Mode
Figure 28. Input Normal Mode Rejection 2x Speed Mode
applications inForMation
INPUT SIGNAL FREQUENCY (fN)
INPUT
NORMAL
REJECTION
(dB)
2499 F27
0
–20
–40
–60
–80
–100
–120
0
fN 2fN 3fN 4fN 5fN 6fN 7fN 8fN
INPUT SIGNAL FREQUENCY (fN)
INPUT
NORMAL
REJECTION
(dB)
2499 F28
0
–20
–40
–60
–80
–100
–120
250
248
252 254 256 258 260 262 264
相关PDF资料
PDF描述
ISL41334IRZ-T TRANSISTOR ESD SGL/DUAL 40-QFN
LT1721IS IC COMP R-RINOUT QUAD 16-SOIC
LT1721CGN#TRPBF IC COMP R-RINOUT QUAD 16-SSOP
85100JC1210PZ50 CONN RCPT WALL MT 10POS W/PIN
LT1016IN8#PBF IC COMPARATOR 10NS HI-SPEED 8DIP
相关代理商/技术参数
参数描述
LTC2600CGN 功能描述:IC DAC OCTAL R-R 16BIT 16SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散(最大):100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC(J 形引线) 供应商设备封装:28-PLCC(11.51x11.51) 包装:带卷 (TR) 输出数目和类型:1 电压,单极;1 电压,双极 采样率(每秒):143k
LTC2600CGN#PBF 功能描述:IC DAC OCTAL R-R 16BIT 16SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 设置时间:4µs 位数:12 数据接口:串行 转换器数目:2 电压电源:单电源 功率耗散(最大):- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP,8-MSOP(0.118",3.00mm 宽) 供应商设备封装:8-uMAX 包装:管件 输出数目和类型:2 电压,单极 采样率(每秒):* 产品目录页面:1398 (CN2011-ZH PDF)
LTC2600CGN#PBF 制造商:Linear Technology 功能描述:IC 16BIT DAC OCTAL RR 16SSOP 制造商:Linear Technology 功能描述:IC, 16BIT DAC, OCTAL, RR, 16SSOP
LTC2600CGN#TR 功能描述:IC DAC R-R 16-BIT OCTAL 16-SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散(最大):100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC(J 形引线) 供应商设备封装:28-PLCC(11.51x11.51) 包装:带卷 (TR) 输出数目和类型:1 电压,单极;1 电压,双极 采样率(每秒):143k
LTC2600CGN#TRPBF 功能描述:IC DAC OCTAL R-R 16BIT 16SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散(最大):100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC(J 形引线) 供应商设备封装:28-PLCC(11.51x11.51) 包装:带卷 (TR) 输出数目和类型:1 电压,单极;1 电压,双极 采样率(每秒):143k