Datasheet AD826 (Analog Devices) - 14
| Manufacturer | Analog Devices |
| Description | Low Cost, High Speed, Low Power Dual Operational Amplifier |
| Pages / Page | 16 / 14 — AD826. HIGH PERFORMANCE ADC BUFFER. 0.1. 1/2. VINA. COAX. CABLE. AD872. … |
| Revision | C |
| File Format / Size | PDF / 811 Kb |
| Document Language | English |
AD826. HIGH PERFORMANCE ADC BUFFER. 0.1. 1/2. VINA. COAX. CABLE. AD872. 500mV. 12-BIT. p-p MAX. 52.5. 10MSPS. ADC. VINB. 100. F 25V. COMMON. –VS. –5V
Text Version of Document
AD826 HIGH PERFORMANCE ADC BUFFER 1k
Figure 42 is a schematic of a 12-bit high speed analog-to-digital
VS
converter. The AD826 dual op amp takes a single ended input
0.1 F
and drives the AD872 A/D converter differentially, thus reduc- ing 2nd harmonic distortion. Figure 43 is a FFT of a 1 MHz
1k
input, sampled at 10 MHz with a THD of –78 dB. The AD826
1/2 VINA
can be used to amplify low level signals so that the entire range
AD826 50
of the converter is used. The ability of the AD826 to perform on
COAX CABLE V
a ± 5 volt supply or even with a single 5 volts combined with its
IN AD872 500mV 12-BIT
rapid settling time and ability to deliver high current to compli-
p-p MAX 52.5 10MSPS ADC
cated loads make it a very good flash A/D converter buffer as well as a very useful general purpose building block.
1/2 VINB AD826 1k 0.1 F 5V VS 100 F 25V COMMON –VS 100 F 25V 1k –5V –VS
Figure 42. A Differential Input Buffer for High Bandwidth ADCs Figure 43. FFT, Buffered A/D Converter REV. C –13–
Figure 42 is a schematic of a 12-bit high speed analog-to-digital
VS
converter. The AD826 dual op amp takes a single ended input
0.1 F
and drives the AD872 A/D converter differentially, thus reduc- ing 2nd harmonic distortion. Figure 43 is a FFT of a 1 MHz
1k
input, sampled at 10 MHz with a THD of –78 dB. The AD826
1/2 VINA
can be used to amplify low level signals so that the entire range
AD826 50
of the converter is used. The ability of the AD826 to perform on
COAX CABLE V
a ± 5 volt supply or even with a single 5 volts combined with its
IN AD872 500mV 12-BIT
rapid settling time and ability to deliver high current to compli-
p-p MAX 52.5 10MSPS ADC
cated loads make it a very good flash A/D converter buffer as well as a very useful general purpose building block.
1/2 VINB AD826 1k 0.1 F 5V VS 100 F 25V COMMON –VS 100 F 25V 1k –5V –VS
Figure 42. A Differential Input Buffer for High Bandwidth ADCs Figure 43. FFT, Buffered A/D Converter REV. C –13–