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參數(shù)資料
| 型號(hào)： | DC1500A-C |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 5/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD SAR ADC LTC2391-16 |
| 軟件下載： | QuikEval II System |
| 設(shè)計(jì)資源： | DC1500A Design File DC1500A Schematic |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 輸入范圍： | ±4.096 V |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 95mW @ 250kSPS |
| 工作溫度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2391-16 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | DC718C-ND - DEMO QUIKEVAL-II DATA LT6350IMS8#TRPBF-ND - IC DIFF CONVERT/ADC DRIVER 8MSOP LT6350IMS8#PBF-ND - IC DIFF CONVERT/ADC DRIVER 8MSOP LT6350IDD#TRPBF-ND - IC DIFF CONVERT/ADC DRIVER 8-DFN LT6350IDD#PBF-ND - IC DIFF CONVERT/ADC DRIVER 8-DFN LT6350HMS8#TRPBF-ND - IC DIFF CONVERT/ADC DRIVER 8MSOP LT6350HMS8#PBF-ND - IC DIFF CONVERT/ADC DRIVER 8MSOP LT6350HDD#TRPBF-ND - IC DIFF CONVERT/ADC DRIVER 8-DFN LT6350HDD#PBF-ND - IC DIFF CONVERT/ADC DRIVER 8-DFN LT6350CMS8#TRPBF-ND - IC DIFF CONVERT/ADC DRIVER 8MSOP 更多... |
LTC2391-16
13
239116fa
APPLICATIONS INFORMATION
Internal Reference
To use the internal reference, simply tie the REFOUT and
REFIN pins together. This connects the 4.096V output of
the internal reference to the input of the internal reference
buffer. The output impedance of the internal reference is
approximately 2.6kΩ and the input impedance of the in-
ternal reference buffer is about 85kΩ. It is recommended
that this node be bypassed to ground with a 1μF or larger
capacitor to lter the output noise of the internal reference.
The REFSENSE pin should be left oating when using the
internal reference.
External Reference
An external reference can be used with the LTC2391-16
when even higher performance is required. The
LT1790-4.096 offers 0.05% (max) initial accuracy and
10ppm/°C (max) temperature coefcient. When using an
external reference, connect the reference output to the
REFIN pin and connect the REFOUT pin to ground. The
REFSENSE pin should be connected to the ground of the
external reference.
DYNAMIC PERFORMANCE
Fast fourier transform (FFT) techniques are used to test
the ADC’s frequency response, distortion and noise at the
rated throughput. By applying a low distortion sine wave
and analyzing the digital output using an FFT algorithm,
the ADC’s spectral content can be examined for frequen-
cies outside the fundamental. The LTC2391-16 provides
guaranteed tested limits for both AC distortion and noise
measurements.
Signal-to-Noise and Distortion Ratio (SINAD)
The signal-to-noise and distortion ratio (SINAD) is the
ratio between the RMS amplitude of the fundamental input
frequency and the RMS amplitude of all other frequency
components at the A/D output. The output is band-limited
to frequencies from above DC and below half the sampling
frequency. Figure 5 shows that the LTC2391-16 achieves
a typical SINAD of 93.5dB at a 250ksps sampling rate
with a 20kHz input.
Figure 5. 16k Point FFT of the LTC2391-16, fS = 250ksps, fIN = 20kHz
FREQUENCY (kHz)
0
–180
AMPLITUDE
(dBFS)
–160
–120
–100
–80
50
100
125
0
239116 G08
–140
25
75
–60
–40
–20
SNR = 94dB
THD
–103dB
SINAD = 93.5dB
SFDR = 104dB
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| DC1500A-B | BOARD SAR ADC LTC2392-16 |
| STD17W-Y | WIRE & CABLE MARKERS |
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