Component and Measurement Advances Ensure 16-Bit DAC Settling Time
Detailed guide on measuring 16-bit DAC settling time using sampling techniques to avoid oscilloscope overdrive and ensure 15ppm accuracy.
Overview
This application note, authored by Jim Williams, addresses the technical challenges of measuring digital-to-analog converter (DAC) settling time to 16-bit (0.0015%) resolution. It explains why traditional summing node techniques fail due to oscilloscope overdrive and recovery limitations. The document details a high-performance measurement circuit utilizing a diode bridge sampling switch, a residue amplifier, and a delayed pulse generator to isolate the settling waveform. It provides performance data for specific components including the LTC1597 DAC and LT1468 operational amplifier, alongside discussions on compensation and reference selection for precision data acquisition.
Use Cases
- High-precision instrumentation design
- Waveform generation systems
- Feedback control loop optimization
- Automated test equipment (ATE) development
- Data acquisition system calibration
Topics
Referenced Parts
VHD-200
Vishay
VISHAY VHD-200, RATIO SET
LT1001
Linear Technology
LT1001 Amplifier
LT1012
Linear Technology
LT1012 Amplifier
LT1021
Linear Technology
LT1021 Reference-10V
LT1027
Linear Technology
LT1027 Reference-5V
LT1175-5
Linear Technology
LT1175-5 FOR – 5V
LT1220
Linear Technology
A1 LT1220
LT1222
Linear Technology
A2 LT1222
LT1236-10
Linear Technology
LT1236-10V
LT1461
Linear Technology
LT1461 Reference-4.096V
LT1468
Linear Technology
LT1468 Amplifier
LTC1595
Linear Technology
LTC1595 DAC
LTC1597
Linear Technology
LTC1597 DAC
LTC1650
Linear Technology
LTC1650 DAC
LM199A
Linear Technology
LM199A Reference-6.95V
LT317A
Linear Technology
USE LT317A FOR 5V
MRF-501
Motorola
Q1, Q2: MRF-501
74HC04
Generic
74HC04
S102
Vishay
VISHAY S102 RESISTOR 0.01%
VHD-200
Vishay
** VISHAY VHD-200, RATIO SET: 10ppm MATCHING
VHD-200
Vishay
**VISHAY VHD-200, RATIO SET: 10ppm MATCHING
| CA3039M | Harris | SAMPLING BRIDGE AND TEMPERATURE CONTROL DIODES: HARRIS CA3039M |
| 1N4148 | Generic | 1N4148 |
| 1N5711 | Generic | D7 TO D9: 1N5711 |
| 2N2219 | Generic | Q5 2N2219 |
| LM3045 | Harris | Q3, Q4: LM3045 ARRAY |
| 74HC123 | Generic | 74HC123 one shot |
| VHD-200 | Vishay | VISHAY VHD-200, RATIO SET |
| LT1001 | Linear Technology | LT1001 Amplifier |
| LT1012 | Linear Technology | LT1012 Amplifier |
| LT1021 | Linear Technology | LT1021 Reference-10V |
| LT1027 | Linear Technology | LT1027 Reference-5V |
| LT1175-5 | Linear Technology | LT1175-5 FOR – 5V |
| LT1220 | Linear Technology | A1 LT1220 |
| LT1222 | Linear Technology | A2 LT1222 |
| LT1236-10 | Linear Technology | LT1236-10V |
| LT1461 | Linear Technology | LT1461 Reference-4.096V |
| LT1468 | Linear Technology | LT1468 Amplifier |
| LTC1595 | Linear Technology | LTC1595 DAC |
| LTC1597 | Linear Technology | LTC1597 DAC |
| LTC1650 | Linear Technology | LTC1650 DAC |
| LM199A | Linear Technology | LM199A Reference-6.95V |
| LT317A | Linear Technology | USE LT317A FOR 5V |
| MRF-501 | Motorola | Q1, Q2: MRF-501 |
| 74HC04 | Generic | 74HC04 |
| S102 | Vishay | VISHAY S102 RESISTOR 0.01% |
| VHD-200 | Vishay | ** VISHAY VHD-200, RATIO SET: 10ppm MATCHING |
| VHD-200 | Vishay | **VISHAY VHD-200, RATIO SET: 10ppm MATCHING |