The MAX1211 is a 3.3V, 12-bit analog-to-digital converter (ADC) featuring a fully differential wideband track-and-hold (T/H) input, driving the internal quantizer. The MAX1211 is optimized for low power, small size, and high dynamic performance in intermediate frequency (IF) sampling applications. This ADC operates from a single 3.0V to 3.6V supply, consuming only 340mW while delivering a typical signal-to-noise ratio (SNR) performance of 66.8dB at a 175MHz input frequency. The T/H-driven input stage accepts single-ended or differential inputs. In addition to low operating power, the MAX1211 features a 0.15mW power-down mode to conserve power during idle periods. A flexible reference structure allows the MAX1211 to use its internal precision bandgap reference or accept an externally applied reference. A common-mode reference is provided to simplify design and reduce external component count in differential analog input circuits. The MAX1211 supports both a single-ended and differential input clock drive. Wide variations in the clock duty cycle are compensated with the ADC’s internal duty-cycle equalizer. The MAX1211 features parallel, CMOS-compatible outputs. The digital output format is pin selectable to be either two’s complement or Gray code. A data-valid indicator eliminates external components that are normally required for reliable digital interfacing. A separate power input for the digital outputs accepts a voltage from 1.7V to 3.6V.
The MAX1211 is a 3.3 V, 12‑bit analog‑to‑digital converter optimized for intermediate‑frequency (IF) sampling applications. It features a fully differential track‑and‑hold input, selectable digital output format, and a low‑power design that consumes only 340 mW in differential clock mode.
The device is offered in a 40‑pin thin QFN package (6 mm × 6 mm × 0.8 mm) and operates over an extended industrial temperature range of –40 °C to +85 °C. It provides up to 65 MHz maximum clock frequency, 66.8 dB typical SNR at 175 MHz, and 79.7 dB SFDR at the same frequency, making it suitable for IF and baseband receivers, ultrasound imaging, and portable instrumentation.
| Resolution | 12 bits |
|---|---|
| Maximum Clock Frequency | 65 MHz |
| Typical Power Consumption (Differential Clock) | 340 mW |
| Power‑Down Mode Power | 0.15 mW |
| Package | 40‑pin thin QFN (6 mm × 6 mm × 0.8 mm) |
| Operating Temperature Range | –40 °C to +85 °C |
| Typical SNR at 175 MHz | 66.8 dB |
| Typical SFDR at 175 MHz | 79.7 dB |
The MAX1211 can operate with a clock frequency up to 65 MHz.
In differential clock mode the device consumes about 340 mW.
It is supplied in a 40‑pin thin QFN package measuring 6 mm × 6 mm × 0.8 mm.
The typical SNR is 66.8 dB at a 175 MHz input frequency.