AD7388-4BCPZ

The AD7386-4/AD7387-4/AD7388-4 are 16-bit, 14-bit, and 12-bit compatible, quad, simultaneous sampling, high-speed, successive approximation register (SAR), analog-to-digital converters (ADCs) operating from a 3.0 V to 3.3 V power supply with throughput rates up to 4 MSPS. The single-ended analog input accepts voltage from 0 V to VREF, and is sampled and converted on the falling edge of CS. The AD7386-4/AD7387-4/AD7388-4 have on-chip oversampling blocks to improve dynamic range and reduce noise at lower bandwidths. The oversampling can boost up to two bits of added resolution. The REFIO pin can have a reference voltage (VREF) of 2.5 V to 3.3 V. The conversion process and data acquisition use standard control inputs, allowing easy interfacing to microprocessors or digital signal processors (DSPs). The conversion result can clock out simultaneously via 4-wire mode for faster throughput or via 1-wire serial mode when slower throughput is allowed. The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using the separate logic supply. The AD7386-4/AD7387-4/AD7388-4 are available in a 24-lead lead frame chip scale package (LFCSP) and operate over a temperature range of -40℃ to +125℃.

Applications

• Motor control position feedback
• Motor control current sense
• Data acquisition systems
• Erbium doped fiber amplifier (EDFA) applications
• Traveling wave fault detection
• In-phase and quadrature demodulation

Key features

• 16-bit, 14-bit, and 12-bit ADC family
• Quad simultaneous sampling
• Single-ended analog inputs
• High throughput rate: 4 MSPS
• SNR (typical): 84.7 dB (AD7386-4) at VREF = 3.3V; 82.4 dB (AD7387-4) at VREF = 3.3V; 73.7 dB (AD7388-4); 92 dB with OSR = 8, VREF = 3.3 V (AD7386-4)
• On-chip oversampling function
• 2-bit resolution boost
• Out of range indicator (ALERT)
• INL (typical): ±4 LSB (AD7386-4); ±1 LSB (AD7387-4); ±0.2 LSB (AD7388-4)
• High-speed serial interface
• Temperature range: -40°C to +125°C
• 2.5 V internal reference at 10 ppm/°C (maximum)
• 24-lead LFCSP