Texas Instruments has introduced a pair of high-speed, high-precision analog-to-digital converters (ADCs) from the company’s Burr-Brown product line. Optimized for very linear high-speed operation, the ADS1601 and ADS1602 are appropriate for demanding measurement applications in scientific instrumentation, automated test equipment, data acquisition, medical imaging and vibration analysis. The ADS1602 modulator samples input signals with a 40 MHz clock, while the digital filter decimates the modulator output by 16 to provide high resolution 16-bit output data at 2.5 MSPS over a serial interface. Dynamic performance is desirable all the way up to the 1.23 MHz passband transition. THD is 101 dB; SFDR is 103 dB, while SNR is greater than 91 dB. The ADS1601 has the same advanced architecture and is optimized for applications requiring less aggressive data rates and lower power dissipation. The ADS1601 features 1.25 MSPS data rate, 330 mW power dissipation, 92 dB signal-to-noise ratio (SNR), 103 dB total harmonic distortion (THD) and 105 dB spurious-free dynamic range (SFDR). The ADS1601 is pin-compatible with the ADS1602. The ADS1601 and ADS1602 use oversampling topology, which reduces clock jitter sensitivity during the sampling of high-frequency, large amplitude signals by a factor of four over that achieved by Nyquist-rate ADCs, according to the company. A full-scale 3V differential input range makes out-of-range signals unlikely. The on-chip decimation filter stop band extends to 38.6 MHz (ADS1601 = 19.3MHz), which greatly simplifies the anti-aliasing circuitry. The modulator samples the input signal up to 40 MSPS (ADS1601 = 20 MSPS) while the 16x decimation filter uses a series of half-band FIR filter stages to provide 75 dB stop band attenuation and 0.001 dB of passband ripple. Output data is provided over a simple three-wire serial interface, with a -3 dB bandwidth of 1.23 MHz (ADS1601 = 615 kHz). The output data or its complementary format directly connects to DSPs, as well as FPGAs or ASICs. A dedicated synchronization pin enables simultaneous sampling with multiple ADS1601s or ADS1602s in multi-channel systems. Power dissipation is set by an external resistor and can be reduced when operating at slower speeds. The devices operate from a +5V analog supply and a +3V digital supply. The digital I/O supply operates from +2.7V to +5.25V, enabling the digital interface to support a range of logic families. All features are controlled by dedicated I/O pins. The ADS1601 and ADS1602 are packaged in a 7 mm × 7 mm TQFP-48.