SLAS669E September   2010  – may 2020 ADS5400-SP

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Block Diagram
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Timing Characteristics
    8. 6.8 Interleaving Adjustments
    9. 6.9 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Input Configuration
      2. 7.3.2  Voltage Reference
      3. 7.3.3  Analog Input Over-Range Recovery Error
      4. 7.3.4  Clock Inputs
      5. 7.3.5  Over Range
      6. 7.3.6  Data Scramble
      7. 7.3.7  Test Patterns
      8. 7.3.8  Die Identification and Revision
      9. 7.3.9  Die Temperature Sensor
      10. 7.3.10 Interleaving
        1. 7.3.10.1 Gain Adjustment
        2. 7.3.10.2 Offset Adjustment
        3. 7.3.10.3 Input Clock Coarse Phase Adjustment
        4. 7.3.10.4 Input Clock Fine Phase Adjustment
    4. 7.4 Device Functional Modes
      1. 7.4.1 Output Bus and Clock Options
      2. 7.4.2 Reset and Synchronization
      3. 7.4.3 LVDS
    5. 7.5 Programming
      1. 7.5.1 Serial Interface
        1. Table 2. Instruction Byte of the Serial Interface
    6. 7.6 Serial Register Map
      1. 7.6.1 Description of Serial Registers
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Clocking Source for ADS5400-SP
        2. 8.2.2.2 Amplifier Selection
      3. 8.2.3 Application Curve
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
        1. 11.1.1.1 Definition of Specifications
    2. 11.2 Documentation Support
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

Definition of Specifications

Analog Bandwidth
The analog input frequency at which the power of the fundamental is reduced by 3 dB with respect to the low-frequency value

Aperture Delay
The delay in time between the rising edge of the input sampling clock and the actual time at which the sampling occurs

Aperture Uncertainty (Jitter)
The sample-to-sample variation in aperture delay

Clock Pulse Duration/Duty Cycle
The duty cycle of a clock signal is the ratio of the time the clock signal remains at a logic high (clock pulse duration) to the period of the clock signal, expressed as a percentage.

Differential Nonlinearity (DNL)
An ideal ADC exhibits code transitions at analog input values spaced exactly 1 LSB apart. DNL is the deviation of any single step from this ideal value, measured in units of LSB.

Common-Mode Rejection Ratio (CMRR)
CMRR measures the ability to reject signals that are presented to both analog inputs simultaneously. The injected common-mode frequency level is translated into dBFS, the spur in the output FFT is measured in dBFS, and the difference is the CMRR in dB.

Effective Number of Bits (ENOB)
ENOB is a measure in units of bits of a converter's performance as compared to the theoretical limit based on quantization noise

Equation 9. ENOB = (SINAD – 1.76)/6.02

Gain Error
Gain error is the deviation of the ADC actual input full-scale range from its ideal value, given as a percentage of the ideal input full-scale range.

Integral Nonlinearity (INL)
INL is the deviation of the ADC transfer function from a best-fit line determined by a least-squares curve fit of that transfer function. The INL at each analog input value is the difference between the actual transfer function and this best-fit line, measured in units of LSB.

Offset Error
Offset error is the deviation of output code from mid-code when both inputs are tied to common-mode.

Power-Supply Rejection Ratio (PSRR)
PSRR is a measure of the ability to reject frequencies present on the power supply. The injected frequency level is translated into dBFS, the spur in the output FFT is measured in dBFS, and the difference is the PSRR in dB. The measurement calibrates out the benefit of the board supply decoupling capacitors.

Signal-to-Noise Ratio (SNR)
SNR is the ratio of the power of the fundamental (PS) to the noise floor power (PN), excluding the power at dc and in the first five harmonics.

Equation 10. ADS5400-SP q1_snr_las515.gif

SNR is either given in units of dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range.

Signal-to-Noise and Distortion (SINAD)
SINAD is the ratio of the power of the fundamental (PS) to the power of all the other spectral components including noise (PN) and distortion (PD), but excluding dc.

Equation 11. ADS5400-SP q2_sinad_las515.gif

SINAD is either given in units of dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range.

Temperature Drift
Temperature drift (with respect to gain error and offset error) specifies the change from the value at the nominal temperature to the value at TMIN or TMAX. It is computed as the maximum variation the parameters over the whole temperature range divided by TMIN – TMAX.

Total Harmonic Distortion (THD)
THD is the ratio of the power of the fundamental (PS) to the power of the first five harmonics (PD).

Equation 12. ADS5400-SP q3_thd_las515.gif

THD is typically given in units of dBc (dB to carrier).

Two-Tone Intermodulation Distortion (IMD3)
IMD3 is the ratio of the power of the fundamental (at frequencies f1, f2) to the power of the worst spectral component at either frequency 2f1 – f2 or 2f2 – f1). IMD3 is given in units of either dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range.