AD7621ASTZ

The AD7621 is a 16-bit, 3 MSPS, charge redistribution SAR, fully differential analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. It contains a high speed 16-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. It features two very high sampling rate modes (wideband warp and warp), a fast mode (normal) for asynchronous rate applications, and a reduced power mode (impulse) for low power applications where the power is scaled with the throughput. Operation is specified from -40°C to +85°C.

Applications

• Medical instruments
• High speed data acquisition
• Digital signal processing
• Communications
• Instrumentation
• Spectrum analysis
• ATE

Key features

• Throughput 3 MSPS (wideband warp and warp mode), 2 MSPS (normal mode), 1.25 MSPS (impulse mode)
• 2.048 V internal reference
• Differential input range: ±VREF (VREF up to 2.5 V)
• INL: ±z LSB maximum, ±τ LSB typical
• 16-bit resolution with no missing codes
• SINAD: 89 dB typical @ 100 kHz
• THD: −101 dB typical @ 100 kHz
• No pipeline delay (SAR architecture)
• Parallel (16- or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface
• SPI-/QSPI-/MICROWIRE-/DSP-compatible
• 2.5 V single-supply operation
• Power dissipation: 65 mW typical @ 3 MSPS
• 48-lead LQFP and 48-lead LFCSP_VQ packages
• Speed upgrade of the AD7677