5V Single-Supply, 1Msps, 14-Bit Self-Calibrating ADC

The MAX1205 is a 14-bit, monolithic, analog-to-digital converter (ADC) capable of conversion rates up to 1Msps. This integrated circuit, built on a CMOS process, uses a fully differential, pipelined architecture with digital error correction and a short self-calibration procedure that corrects for capacitor and gain mismatches and ensures 14-bit linearity at full sample rates. An on-chip track/hold (T/H) maintains superb dynamic performance up to the Nyquist frequency. The MAX1205 operates from a single +5V supply.

The fully differential inputs allow an input swing of ±VREF. The reference is also differential, with the positive reference (RFPF) typically connected to +4.096V and the negative reference (RFNF) connected to analog ground. Additional sensing pins (RFPS, RFNS) are provided to compensate for any resistive-divider action that may occur due to finite internal and external resistances in the reference traces and the on-chip resistance of the reference pins. A single-ended input is also possible using two operational amplifiers.

The power dissipation is typically 257mW at +5V, at a sampling rate of 1Msps. The device employs a CMOS-compatible, 14-bit parallel, two's complement output data format. For higher sampling rates, the MAX1201 is a 2.2Msps pin-compatible upgrade to the MAX1205.

The MAX1205 is available in an MQFP package, and operates over the commercial (0°C to +70°C) and the extended (-40°C to +85°C) temperature ranges.

Applications

* Communication Systems * Data Acquisition * Imaging * Medical * Scanners

* Monolithic, 14-Bit, 1Msps ADC

* +5V Single Supply

* SNR of 80dB for fIN = 500kHz

* SFDR of 87dB for fIN = 500kHz

* Low Power Dissipation: 257mW

* On-Demand Self-Calibration

* Differential Nonlinearity Error: ±0.3LSB

* Integral Nonlinearity Error: ±1.2LSB

* Three-State, Two's Complement Output Data