Description
24-Bit ⌺-⌬ ADC with Low Noise PGA AD1555/AD1556
high dynamic range measurement applications.The AD1555 outputs a ones-density bitstream proportional to the analog input.When used in conjunction with the AD1556 digital filter/ decimator, a high performance ADC is realized.The continuous-time analog modulator input architecture avoids the need for an external antialias filter.The programmable gain front end simplifies system design, extends the dynamic range, and reduces the system board area
Features
- AD1555 Fourth Order ⌺- ⌬ Modulator Large Dynamic Range 116 dB Min, 120 dB Typical @ 1 ms 117 dB Typical @ 0.5 ms Low Input Noise: 80 nV rms @ 4 ms with Gain of 34,128 Low Distortion:.
- 111 dB Max,.
- 120 dB Typical Low Intermodulation: 122 dB Sampling Rate at 256 kSPS Very High Jitter Tolerance No External Antialias Filter Required Programmable Gain Front End Input Range: ؎2.25 V Robust Inputs Gain Settings: 1, 2.5, 8.5, 34, 128 Common-Mode Rejection (DC to 1 kHz) 93 dB Min, 101 dB.