High speed on-chip reference buffer with replica source follower is also included for linearity performance. The ADC was fabricated in a standard 130-nm CMOS process and an occupied silicon area of 0.95 mm u00d7 1.15 mm. Performance of 73 dB spurious-free-dynamic-range is measured at 160 ...
A typical input structure for an ADC with an input buffer is shown in Figure 3-31 for the AD9042 12-bit, 41 MSPS ADC. The effective input impedance is 250 Ω, and an external 61.9 Ω resistor in parallel with this internal 250 Ω provides an effective input termination of 50 Ω to ...
a FEATURES Charge Balancing ADC 24 Bits, No Missing Codes ⴞ0.0015% Nonlinearity 2-Channel Programmable Gain Front End Gains from 1 to 128 Differential Inputs Low-Pass Filter with Programmable Filter Cutoffs Ability to Read/Write Calibration Coefficients Bidirectional Microcontroller Serial Interface In...
LC2MOS Signal Conditioning ADC AD7712 FEATURES Charge Balancing ADC 24 Bits No Missing Codes ⴞ0.0015% Nonlinearity High Level and Low Level Analog Input Channels Programmable Gain for Both Inputs Gains from 1 to 128 Differential Input for Low Level Channel Low-Pass Filter with Programmable Filter...
Harmonic performance of these generators is typically not as good as the intrinsic linearity of a given ADC, mandating the need for additional filtering between the signal generator and the analog input to the ADC. Analog Signal Filter Both fixed frequency and tunable frequency band-pass filters ...
A 16-Bit, 6 MSPS SAR ADC System with Low Power Input Drivers and Reference Optimized for Multiplexed Applications
One of the ADCs in the analog subsystem is a fast, accurate, configurable delta-sigma ADC with these features: Less than 100-µV offset A gain error of 0.2% Integral non linearity (INL) less than ±2 LSB Differenti...
This transformer has a lower nominal step up ratio of about 2/1, and is optimized for use with lower noise resistance amplifiers such as the AD797. As can be noted from the figure, the general topology is similar to the previous transformer coupled preamp, but some details allow premium ...
ADC input from a high impedance of 5k. Together with the ADC input capacitance, that high impedance would create a delay in the sample and hold, forcing you to slow down the conversion rate to give the capacitive time to charge. That is why I always recommend an op amp to buffer that ...
The accuracy and gain of the comparator will be a major factor in determining the accuracy of the ADC, along with the linearity of the DAC. Because the digital count to the DAC always starts at a zero count and may have to cycle through all 2N possible count combinations before finding ...