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参数资料
| 型号： | LTC2377CDE-18#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT 500KSPS 16-MSOP |
| 产品培训模块： | LTC2379- 18-/16-bit Fully-Differential SAR ADC Family Overview |
| 标准包装： | 91 |
| 位数： | 18 |
| 采样率（每秒）： | 500k |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 8mW |
| 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： | 16-WFDFN 裸露焊盘 |
| 供应商设备封装： | 16-DFN（4x3） |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，双极 |
| 配用： | DC1783A-G-ND - BOARD SAR ADC LTC2377-18 DC1783A-C-ND - BOARD SAR ADC LTC2377-16 |
LTC2377-18
14
237718f
Figure 11. 32k Point FFT with fIN = 2kHz of the LTC2377-18
FREQUENCY (kHz)
0
50
100
150
250
200
–180
AMPLITUDE
(dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237718 F11
SNR = 102.3dB
THD = –124dB
SINAD = 102.2dB
SFDR = 125dB
SNR = 102.3dB
THD = –124dB
SINAD = 102.2dB
SFDR = 125dB
APPLICATIONS INFORMATION
0μA to a maximum of 0.4mA at 500ksps. This step in DC
current draw triggers a transient response in the reference
that must be considered since any deviation in the refer-
ence output voltage will affect the accuracy of the output
code. In applications where the transient response of the
reference is important, the fast settling LTC6655-5 refer-
ence is also recommended.
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 LTC2377-18 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 11 shows that the LTC2377-18 achieves
a typical SINAD of 102dB at a 500kHz sampling rate with
a 2kHz input.
Signal-to-Noise Ratio (SNR)
The signal-to-noise ratio (SNR) is the ratio between the
RMS amplitude of the fundamental input frequency and
the RMS amplitude of all other frequency components
except the first five harmonics and DC. Figure 11 shows
that the LTC2377-18 achieves a typical SNR of 102dB at
a 500kHz sampling rate with a 2kHz input.
Total Harmonic Distortion (THD)
Total Harmonic Distortion (THD) is the ratio of the RMS sum
of all harmonics of the input signal to the fundamental itself.
The out-of-band harmonics alias into the frequency band
between DC and half the sampling frequency (fSMPL/2).
THD is expressed as:
THD
=20log
V2
2 + V32 + V42 +…+ V
N
2
V1
where V1 is the RMS amplitude of the fundamental fre-
quency and V2 through VN aretheamplitudesofthesecond
through Nth harmonics.
POWER CONSIDERATIONS
The LTC2377-18 provides two power supply pins: the
2.5V power supply (VDD), and the digital input/output
interface power supply (OVDD). The flexible OVDD supply
allows the LTC2377-18 to communicate with any digital
logic operating between 1.8V and 5V, including 2.5V and
3.3V systems.
Power Supply Sequencing
The LTC2377-18 does not have any specific power supply
sequencing requirements. Care should be taken to adhere
to the maximum voltage relationships described in the
Absolute Maximum Ratings section. The LTC2377-18
has a power-on-reset (POR) circuit that will reset the
LTC2377-18 at initial power-up or whenever the power
supply voltage drops below 1V. Once the supply voltage
re-enters the nominal supply voltage range, the POR will
reinitialize the ADC. No conversions should be initiated
until 20μs after a POR event to ensure the reinitialization
period has ended. Any conversions initiated before this
time will produce invalid results.
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相关代理商/技术参数 |
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| LTC2377CDE-20#PBF | 制造商:Linear Technology 功能描述:IC ADC 20BIT 500KSPS 16DFN 制造商:Linear Technology 功能描述:IC ADC 20BIT 500KSPS DFN-1 制造商:Linear Technology 功能描述:IC, ADC, 20BIT, 500KSPS, DFN-16 制造商:Linear Technology 功能描述:MS-ADC/General Purpose, 20-Bit, 500ksps, 104dB SNR, 0.5pmm INL, 10.5mW, SAR ADC |
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| LTC2377CMS-16#PBF | 功能描述:IC ADC 16BIT 500KSPS 16-MSOP 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 |
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