15-Bit, 80Msps ADC with -78.4dBFS Noise Floor for IF Applications

The MAX1428 is a 5V, high-speed, high-performance analog-to-digital converter (ADC) featuring a fully differential wideband track-and-hold (T/H) and a 15-bit converter core. The MAX1428 is optimized for multichannel, multimode receivers, which require the ADC to meet very stringent dynamic performance requirements. With a noise floor of -78.4dBFS, the MAX1428 allows for the design of receivers with superior sensitivity.

The MAX1428 achieves two-tone, spurious-free dynamic range (SFDR) of -82dBc for input tones of 69MHz and 71MHz. Its excellent signal-to-noise ratio (SNR) of 73.9dB and single-tone SFDR performance (SFDR1/SFDR2) of 83dBc/91dBc at fIN = 70MHz and a sampling rate of 80Msps make this part ideal for high-performance digital receivers.

The MAX1428 operates from an analog 5V and a digital 3V supply, features a 2.56VP-P full-scale input range, and allows for a sampling speed of up to 80Msps. The input T/H operates with a -1dB full-power bandwidth of 260MHz.

The MAX1428 features parallel, CMOS-compatible outputs in two's-complement format. To enable the interface with a wide range of logic devices, this ADC provides a separate output driver power-supply range of 2.3V to 3.5V. The MAX1428 is manufactured in an 8mm x 8mm, 56-pin thin QFN package with exposed paddle (EP) for low thermal resistance, and is specified for the extended industrial (-40°C to +85°C) temperature range.

Note that IF parts MAX1418, MAX1428, and MAX1430 (see Pin-Compatible Higher/Lower Speed Versions Selection table in the full data sheet) are recommended for applications that require high dynamic performance for input frequencies greater than fCLK/3. Unlike its baseband counterpart MAX1427, the MAX1428 is optimized for input frequencies greater than fCLK/3.

Applications

* Antenna Array Processing * Cellular Base-Station Transceiver Systems (BTS) * E911 Location Receivers * Multistandard Receivers * Power Amplifier Linearity Correction * Single- and Multicarrier Receivers * Wireless Local Loop (WLL)

* 80Msps Minimum Sampling Rate

* -78.4dBFS Noise Floor

* Excellent Dynamic Performance

* 73.9dB SNR at fIN = 70MHz and AIN = -2dBFS

* 83dBc/91dBc Single-Tone SFDR1/SFDR2 at fIN = 70MHz and AIN = -2dBFS

* -82dB Multitone SFDR at fIN1 = 69MHz and fIN2 = 71MHz

* Less than 0.25ps Sampling Jitter

* Fully Differential Analog Input Voltage Range of 2.56VP-P

* CMOS-Compatible Two's-Complement Data Output

* Separate Data Valid Clock and Overrange Outputs

* Flexible-Input Clock Buffer

* EV Kit Available for MAX1428 (Order MAX1427EVKIT)