Isolated sigma-delta modulator converts a differential analog input into a high-speed 1-bit data stream through on-chip digital isolation. The device operates from a 5 V analog-side supply with a 3 V to 5.5 V serial-interface supply and accepts a specified ±200 mV input range with ±320 mV full scale. It provides 16-bit no-missing-codes performance, a 10 MHz master clock output, an on-chip reference, and an operating temperature range of −40°C to +125°C. Package options include a 16-lead wide SOIC and an 8-lead gull-wing surface-mount DIP.
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| Modulator order | Second-order sigma-delta |
| Master clock rate | 10 typicalMHz |
| Resolution | 16 minimumbits |
| Integral nonlinearity | ±15 maximum, ±2 typical at −40°C to +85°CLSB |
| Differential nonlinearity | ±0.9 maximumLSB |
| No missing codes | 16 guaranteedbits |
| Offset error | ±0.5 maximummV |
| Offset drift vs temperature | 3.5 maximumµV/°C |
| Input voltage range | ±200 specified, ±320 full scalemV |
| Dynamic input current | ±7 maximumµA |
| Input capacitance | 10 typicalpF |
| SINAD | 70 minimum at −40°C to +85°C, 79 typicaldB |
| Signal-to-noise ratio | 71 minimumdB |
| Total harmonic distortion | −88 typicaldB |
| Effective number of bits | 11.5bits |
| Isolation transient immunity | 25 minimum, 30 typicalkV/µs |
| Analog-side supply voltage | 4.5 to 5.25V |
| Interface-side supply voltage | 3 to 5.5V |
| Analog-side supply current | 12 maximummA |
| Interface-side supply current | 6 maximum at 5.5 V, 4 maximum at 3.3 VmA |
| Operating temperature range | −40 to +125°C |
| Input-to-output withstand voltage | 3750 for 1 minuteV rms |
| Maximum working insulation voltage | 891V peak |
| Creepage | 8.1 minimummm |
| Clearance | 7.46 minimummm |
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