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参数资料
| 型号： | LTC1411CG#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/16页 |
| 文件大小： | 0K |
| 描述： | IC A/D CONV 14BIT 2.5MSPS 36SSOP |
| 标准包装： | 1,000 |
| 位数： | 14 |
| 采样率（每秒）： | 2.5M |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 325mW |
| 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： | 36-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，双极；1 个差分，双极 |
8
LTC1411
1411f
TEST CIRCUITS
Load Circuits for Access Timing
Load Circuits for Output Float Delay
1k
(A) Hi-Z TO VOH AND VOL TO VOH
CL
1k
5V
DN
(B) Hi-Z TO VOL AND VOH TO VOL
CL
1411 TC01
1k
(A) VOH TO Hi-Z
CL
1k
5V
DN
(B) VOL TO Hi-Z
CL
1411 TC02
APPLICATIO S I FOR ATIO
WU
UU
CONVERSION DETAILS
The LTC1411 uses a successive approximation algorithm
and an internal sample-and-hold circuit to convert an
analog signal to a 14-bit parallel output. The ADC is
complete with a precision reference, internal clock and a
programmable input range. The device is easy to interface
with microprocessors and DSPs. (Please refer to the
Digital Interface section for the data format.)
Conversions are started by a falling edge on the CONVST
input. Once a conversion cycle has begun, it cannot be
restarted. Between conversions, the ADC acquires the
analog input in preparation for the next conversion. In the
acquire phase, a minimum time of 100ns will provide
enough time for the sample-and-hold capacitors to ac-
quire the analog signal.
During the conversion, the internal differential 14-bit
capacitive DAC output is sequenced by the SAR from the
most significant bit (MSB) to the least significant bit
(LSB). The input is successively compared with the binary
weighted charges supplied by the differential capacitive
DAC. Bit decisions are made by a high speed comparator.
At the end of a conversion, the DAC output balances the
analog input (AIN+ – AIN–). The SAR contents (a 14-bit
data word) which represents the difference of AIN+ and
AIN– are loaded into the 14-bit output latches.
DYNAMIC PERFORMANCE
The LTC1411 has excellent high speed sampling capabil-
ity. FFT (Fast Fourier Transform) test 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 algo-
rithm, the ADC’s spectral content can be examined for
frequencies outside the fundamental. Figure 2a shows a
typical LTC1411 FFT plot.
Signal-to-Noise
The signal-to-(noise + distortion) ratio [S/N + D)] is the
ratio between the RMS amplitude of the fundamental input
frequency to the RMS amplitude of all other frequency
components at the A/D output. The output is band limited
to frequencies from the above DC and below half the
sampling frequency. Figure 2a shows a typical spectral
content with a 2.5MHz sampling rate and a 100kHz input.
The dynamic performance holds well to higher input
frequencies (see Figure 2b).
Figure 1. Simplified Block Diagram
OTR
D13
OGND
DVP
OVDD
CONTROL LOGIC
INTERNAL
CLOCK
14-BIT
ADC
OUTPUT
DRIVERS
14
+
–
PGA0
PGA1
CONVST
DGND
1411 F01
AIN
+
AIN
–
NAP
SLP
2
1
32
33
34
35
36
31
26
BUSY
27
D0
25
12
28
29
30
AVP
10
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| LTC1411IG | 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC1411IG#PBF | 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| LTC1411IG#TR | 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC1411IG#TRPBF | 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| LTC1412CG | 功能描述:IC A/D CONV 12BIT SAMPLNG 28SSOP RoHS:否 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:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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