AD12401/KIT Analog Devices Inc, AD12401/KIT Datasheet
AD12401/KIT
Specifications of AD12401/KIT
Related parts for AD12401/KIT
AD12401/KIT Summary of contents
Page 1
FEATURES Up to 400 MSPS sample rate SNR of 63 dBFS @128 MHz SFDR of 70 dBFS @128 MHz VSWR of 1:1.5 High or low gain grades Wideband ac-coupled input signal conditioning Enhanced spurious-free dynamic range Single-ended or differential ENCODE ...
Page 2
AD12401 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 DC Specifications ......................................................................... 3 AC Specifications—ENCODE = 400 MSPS.............................. 4 AC Specifications—ENCODE ...
Page 3
SPECIFICATIONS DC SPECIFICATIONS 1.5 V, 0°C ≤ T Table 1. Parameter RESOLUTION ACCURACY No Missing Codes Offset Error Gain Error @ 10 MHz Differential Nonlinearity (DNL) Integral Nonlinearity (INL) TEMPERATURE ...
Page 4
AD12401 Parameter LOGIC OUTPUTS (DRA, DRB, OUTPUT BITS) Differential Output Voltage Output Common-Mode Voltage Output High Voltage Output Low Voltage 1 Tested using input frequency of 70 MHz (see Figure 17). 2 Refer to Table 8 for logic convention on ...
Page 5
Parameter DIGITAL OUTPUT PARAMETERS Valid Time ( Propagation Delay ( Rise Time, t (20% to 80%) R Fall Time, t (20 Propagation Delay (t ) EDR Data to DR Skew (t − ...
Page 6
AD12401 Parameter SWITCHING SPECIFICATIONS 6 Conversion Rate 1 Encode Pulse Width High ( Encode Pulse Width Low ( DIGITAL OUTPUT PARAMETERS Valid Time ( Propagation Delay ( Rise Time, t (20% ...
Page 7
Parameter ANALOG INPUT Frequency Range DIGITAL INPUT (DR_EN) Minimum Time (Low) SWITCHING SPECIFICATIONS Conversion Rate 6 1 Encode Pulse Width High ( Encode Pulse Width Low ( DIGITAL OUTPUT PARAMETERS Valid Time ( ...
Page 8
AD12401 ABSOLUTE MAXIMUM RATINGS Table 5. Parameter VA to AGND VC to DGND VD to DGND Analog Input Voltage Analog Input Power ENCODE Input Voltage ENCODE Input Power Logic Inputs Storage Temperature Range, Ambient Operating Temperature Range EXPLANATION OF TEST ...
Page 9
Table 7. Output Coding (Twos Complement) A (V) IN Code KWS JWS 4095 +1.6 +0 2048 0 0 2047 −0.000781 to +0.0003905 . . . . . . 0 −1.6 to ...
Page 10
AD12401 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS AIN ENC ENC TOP VIEW JOHNSON SMA-50 Ω CONNECT NO. 142-0711-821 2-56 STUDS 4⋅ END VIEW SAMTEC CONNECTOR QTE-060-01-L-D-A-K-TR ENC ENC AIN BOTTOM VIEW NOTE: 1. FOR MATING CONNECTOR, USE SAMTEC, INC. PART NO. ...
Page 11
Table 9. Pin Function Descriptions Pin No. Mnemonic Description Digital Supply, 3 RESET LVTTL device reset. Minimum width = 200 ns. Device resumes operation after 600 ms maximum. DNC Do Not Connect. ...
Page 12
AD12401 Pin No. Mnemonic Description 69 DA3 Channel A Data Bit 3. Complement output bit. 70 DA2 Channel A Data Bit 2. Complement output bit. 71 DA3 Channel A Data Bit 3. True output bit. 72 DA2 Channel A Data ...
Page 13
TERMINOLOGY Analog Bandwidth The analog input frequency at which the spectral power of the fundamental frequency (as determined by the FFT analysis) is reduced by 3 dB. Aperture Delay The delay between the 50% point on the rising edge of ...
Page 14
AD12401 Signal-to-Noise-and-Distortion (SINAD) The ratio of the rms signal amplitude (set 1 dB below full scale) to the rms value of the sum of all other spectral components, including harmonics, but excluding dc and image spur. Signal-to-Noise Ratio (SNR) The ...
Page 15
TYPICAL PERFORMANCE CHARACTERISTICS 0 1 SNR = 63.26dB –10 SFDR = 76.77dBc SINAD = 62.97dB –20 IMAGE SPUR = –76.69dBc –30 –40 –50 –60 –70 – – –100 –110 100 ...
Page 16
AD12401 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 100 120 FREQUENCY (MHz) Figure 12. Two-Tone Intermodulation Distortion (172.1 MHz and 175.1 MHz 400 MSPS), SFDR = 70 dBc; ...
Page 17
ANALOG INPUT FREQUENCY Figure 18. Low Frequency Gain Flatness Rev Page AD12401 ...
Page 18
AD12401 THEORY OF OPERATION The AD12401 uses two high speed, 12-bit ADCs in a time- interleaved configuration to double the sample rate, while maintaining a high level of dynamic range performance. The digital output of each ADC channel is calibrated ...
Page 19
Figure 21 displays the application of this relationship to a full- scale, single-tone input signal on the AD12401, where the DNL was assumed to be 0.4 LSB, and the input noise was assumed to be 0.8 LSB rms. The vertical ...
Page 20
AD12401 GAIN SELECT The AD12401 is graded out for the gain mode and should be ordered accordingly: the AD12401-xxxKWS is calibrated in the low gain mode, and the AD12401-xxxJWS is calibrated in the high gain mode. Performance is not guaranteed ...
Page 21
... PCB thickness of 0.093". Consult sales if board thickness requirements exceed this dimension. AD12401 EVALUATION KIT The AD12401/KIT offers an easy way to evaluate the AD12401. The AD12401/KIT includes the AD12401 mounted on an adapter card, the AD12401 evaluation board, the power supply cables, a 225 MHz buffer memory FIFO board, and the Dual Analyzer software ...
Page 22
AD12401 Table 12. Evaluation Board Bill of Materials (BOM) Item No. Qty. Ref-Des AFB SW1 7 3 J2, J3 ...
Page 23
AD1240X P1 3.3VC RESET 8 7 DNC 10 9 DNC 11 12 DNC 13 14 DNC OROUT 15 16 DNC 17 18 DB11 19 20 DB11 DB11 21 22 DB9 23 24 DB9 26 ...
Page 24
AD12401 Figure 26. Power Plane 1 Figure 27. Power Plane 2 Figure 28. First Ground Plane Figure 29. Second Ground Plane Figure 30. Top Side Copper Figure 31. Bottom Side Copper Rev Page ...
Page 25
Figure 32. Top Mask Figure 33. Top Silkscreen Figure 34. Bottom Silkscreen Figure 35. Evaluation Adapter Board, Top Silkscreen Figure 36. Evaluation Adapter Board, Analog and Digital Layers Figure 37. Evaluation Adapter Board, Bottom Silkscreen Rev Page 25 ...
Page 26
AD12401 LAYOUT GUIDELINES The AD12401 requires a different approach from traditional high speed ADC system layouts. While the AD12401’s internal PCB isolates digital and analog grounds, these planes are tied together through the product’s aluminum case structure. Therefore, the decision ...
Page 27
R.0470[R1.19] 6× Figure 38. Top View of Interface PCB Assembly Rev Page 1.184 [30.0673] 1.025 [26.0164] 2× DATUM = CENTER OF CONNECTOR .000 [.0000] 1.025 [26.0164] 2× 1.184 [30.0673] AD12401 ...
Page 28
... AD12401/KIT 1 The encode rate and gain mode must be selected when ordering the AD12401/KIT. The standard AD12401/KIT is configured for low gain mode at 400 MSPS. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 3.190 TYP 2 ...