The MAX1191 is an ultra-low-power, dual, 8-bit, 7.5Msps analog-to-digital converter (ADC). The device features two fully differential wideband track-and-hold (T/H) inputs. These inputs have a 440MHz bandwidth and accept fully differential or single-ended signals. The MAX1191 delivers a typical signal-to-noise and distortion (SINAD) of 48.6dB at an input frequency of 1.875MHz and a sampling rate of 7.5Msps while consuming only 12mW. This ADC operates from a 2.7V to 3.6V analog power supply. A separate 1.8V to 3.6V supply powers the digital output driver. In addition to ultra-low operating power, the MAX1191 features three power-down modes to conserve power during idle periods. Excellent dynamic performance, ultra-low power, and small size make the MAX1191 ideal for applications in imaging, instrumentation, and digital communications. An internal 1.024V precision bandgap reference sets the full-scale range of the ADC to ±0.512V. A flexible reference structure allows the MAX1191 to use its internal reference or accept an externally applied reference for applications requiring increased accuracy. The MAX1191 features parallel, multiplexed, CMOS-compatible tri-state outputs. The digital output format is offset binary. A separate digital power input accepts a voltage from 1.8V to 3.6V for flexible interfacing to different logic levels. The MAX1191 is available in a 5mm × 5mm, 28-pin thin QFN package, and is specified for the extended industrial (-
The MAX1191 is a dual, 8‑bit analog‑to‑digital converter designed for ultra‑low power operation. It provides two fully differential wideband track‑and‑hold inputs with a 440 MHz bandwidth and can sample at 7.5 Msps while drawing only 12 mW in normal mode. The device operates from a 2.7 V‑3.6 V analog supply and a separate 1.8 V‑3.6 V digital supply, and includes three power‑down modes for further power savings.
The ADC is supplied in a 28‑pin thin QFN package (5 mm × 5 mm) rated for an extended industrial temperature range of –40 °C to +85 °C. Key performance figures include a typical SINAD of 48.6 dB at 1.875 MHz, SNR of 48.7 dB, and SFDR of 69 dBc. The datasheet also provides detailed electrical characteristics, absolute maximum ratings, timing specifications, and package dimensions.
| Resolution | 8 bits |
|---|---|
| Power Consumption (Normal) | 12 mW |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| Input Bandwidth | 440 MHz |
| SINAD (typical) | 48.6 dB at 1.875 MHz |
| SNR (typical) | 48.7 dB at 1.875 MHz |
| SFDR (typical) | 69 dBc at 1.875 MHz |
| Operating Temperature Range | -40 °C to +85 °C |
In normal operation at 7.5 Msps the MAX1191 consumes about 12 mW.