The WFD16 is a 16 bit Waveform Digitizer for high-speed / high resolution waveform capturing and analyzing. The fully differential signal path ensures an exceptional high signal quality. Despite this emphasis on signal quality the WFD16 also has a good DC accuracy. The module features differential inputs with a 50 Ohm or 10 kOhm termination and a with a programmable common-mode voltage. For single ended applications the negative input can be connected to the internal DC-offset voltage source to cancel out a DC component of the input signal. The clock can come from the backplane or from the front panel. The module has 16 input ranges starting at 0.512 Vpp up to 7.68 Vpp, which covers a wide range of Unit Under Test output voltages.
A filter-bank with 3 Low Pass filters (15 MHz, 30 MHz, and 60 MHz) removes out-of-band noise and provides anti-aliasing. The Module uses a state of the art ADC which provides an excellent SNR, THD and linearity. The unit is an excellent choice for dynamic signal capturing and analysis as well as time domain analysis. With 8M-word (16M-byte) of memory long signal streams can be captured. All these features ensure a very accurate result when performing analog measurements. The unit is very suitable for testing DAC linearity and dynamic performance.
A filter-bank with 3 Low Pass filters (15 MHz, 30 MHz, and 60 MHz) removes out-of-band noise and provides anti-aliasing. The Module uses a state of the art ADC which provides an excellent SNR, THD and linearity. The unit is an excellent choice for dynamic signal capturing and analysis as well as time domain analysis. With 8M-word (16M-byte) of memory long signal streams can be captured. All these features ensure a very accurate result when performing analog measurements. The unit is very suitable for testing DAC linearity and dynamic performance.
Block Diagram
Key Features
- 180 MHz max sample speed
- 16 bit resolution
- Fully differential inputs
- 16 input ranges
- Selectable filters to reduce out-of-band noise
- -92 dB THD typical at 1 MHz
- 71 dB SNR typical
- Programmable DC-offset voltage
- For ATX series hardware platform
Downloads
Technical Specifications
General
| Resolution | 16 bit |
| Sample rate | 1 MHz - 180 MHz |
| Pattern depth | 8M words |
Input characteristics
| Input impedance | 50 Ohm or 10 kOhm /25 pF |
| Input ranges (Vpp) | 0.512 V, 0.64 V, 0.786 V, 0.96 V, 1.042 V, 1.28 V, 1.536 V, 1.92 V, 2.048 V, 2.56 V, 3.072 V, 3.84 V, 4.096 V, 5.12 V, 6.114 V, 7.68 V |
| Input filters (3 pole Butterw.) | Bypass, 15 MHz, 30 MHz, 60 MHz |
| Bandwidth -3 dB (typical) | 100 MHz (50 Ohm) |
| Input configuration | Differential, Single Ended, 50 Ohm or 10 kOhm, DC or AC coupled |
| Input operating area | 2 times the input range |
Accuracy (filter bypass)
| Absolute accuracy | ±(800 µV + 0.1 % of range) |
| Non Linearity | ±0.006 of range |
| Temperature drift (typical) | ±(10 ppm of range + 20 ppm of value)/ºC |
DC-offset source
| Resolution | 16 bit |
| Voltage range | equal to the input range |
| DC-offset accuracy | ±(500 µV + 0.01 % of value) |
| Non Linearity | ±100 ppm of range |
Dynamic characteristics
(2 Vpp diff. input signal, 160 MS/s, BW DC-80 MHz)| SNR (1 MHz) | 70 dB |
| SNR (10 MHz) | 68 dB |
| THD (1 MHz) | -89 dB |
| THD (10 MHz) | -85 dB |
| SFDR (1 MHz) | 90 dB |
Clock inputs
| Input impedance | 50 Ohm |
| Threshold level | 0 V / 1 V |
Trigger inputs
| Input impedance | 1 kOhm |
| Threshold level | 0 V / 1 V |