参数资料
型号: LTC2413IGN
厂商: Linear Technology
文件页数: 28/44页
文件大小: 0K
描述: IC A/D CONV 24BIT MICRPWR 16SSOP
标准包装: 100
位数: 24
采样率(每秒): 6.8
数据接口: MICROWIRE?,串行,SPI?
转换器数目: 2
功率耗散(最大): 1mW
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: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-SSOP
包装: 管件
输入数目和类型: 1 个差分,双极
LTC2413
34
sn2413 2413fs
APPLICATIO S I FOR ATIO
WU
U
The user can expect to achieve in practice this level of
performance using the internal oscillator, as it is demon-
strated by Figure 41. Typical measured values of the
normal mode rejection of the LTC2413 operating with the
internal oscillator are shown in Figure 41 superimposed
over the theoretical calculated curve.
As a result of these remarkable normal mode specifica-
tions, minimal (if any) antialias filtering is required in front
of the LTC2413. If passive RC components are placed in
front of the LTC2413, the input dynamic current should be
considered (see Input Current section). In cases where
large effective RC time constants are used, an external
buffer amplifier may be required to minimize the effects of
dynamic input current.
Traditional high order delta-sigma modulators, while pro-
viding very good linearity and resolution, suffer from po-
tential instabilities at large input signal levels. The propri-
etary architecture used for the LTC2413 third order modu-
lator resolves this problem and guarantees a predictable
stable behavior at input signal levels of up to 150% of full
scale. In many industrial applications, it is not uncommon
to have to measure microvolt level signals superimposed
over volt level perturbations and LTC2413 is eminently
suited for such tasks. When the perturbation is differential,
the specification of interest is the normal mode rejection
for large input signal levels. With a reference voltage
VREF = 5V, the LTC2413 has a full-scale differential input
Figure 41. Input Normal Mode Rejection vs Input
Frequency with Input Perturbation of 100% of Full Scale
INPUT FREQUENCY (Hz)
0
20
40
60
80
100
120
140
160
180
200
220
NORMAL
MODE
REJECTION
(dB)
2413 F41
0
–20
–40
–60
–80
–100
–120
VCC = 5V
REF+ = 5V
REF = GND
VINCM = 2.5V
VIN(P-P) = 5V
TA = 25°C
MEASURED DATA
CALCULATED DATA
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