AD7381-4 Differential Input, Quad,14-Bit, Simultaneous Sampling,SAR ADC
2022-05-18
■FEATURES
●14-bit ADC family
●Quad simultaneous sampling
●Fully differential analog inputs
●Wide common-mode range
●High throughput rate: 4 MSPS
●Buffered 2.5 V internal voltage reference (10 ppm/°C maximum)
●On-chip oversampling function
●INL (maximum): 1.5 LSB
●SNR (typical)
◆85.3 dB at VREF = 3.3 V
◆90.6 dB at OSR = 8× rolling average oversampling, RES = 1
●2-bit resolution boost
●Out of range indicator (ALERT)
●High-speed serial interface
●−40°C to +125°C operation
●4 mm × 4 mm, 24-lead LFCSP
■GENERAL DESCRIPTION
●The AD7381-4 a 16-bit, quad, simultaneous sampling, high speed, successive approximation register (SAR), analog-to-digital converter (ADC) that operates from a 3.0 V to 3.6 V power supply and features throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and the analog inputs are sampled and converted on the falling edge of CS.
●The AD7381-4 has 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. A buffered internal 2.5 V reference (10 ppm/°C) is included.Alternatively, an external reference up to 3.3 V can be used.
●The conversion process and data acquisition use standard control inputs allowing for 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.
■PRODUCT HIGHLIGHTS
●Quad simultaneous sampling and conversion.
●Pin-compatible product family.
●High throughput rate, 4 MSPS at 14-bit.
●Space-saving, 4 mm × 4 mm LFCSP.
●Integrated oversampling block to increase dynamic range, reduce noise and reduce SCLK speed requirements.
●Differential analog inputs with wide common-mode range.
●Small sampling capacitor reduces amplifier drive burden.
●14-bit ADC family
●Quad simultaneous sampling
●Fully differential analog inputs
●Wide common-mode range
●High throughput rate: 4 MSPS
●Buffered 2.5 V internal voltage reference (10 ppm/°C maximum)
●On-chip oversampling function
●INL (maximum): 1.5 LSB
●SNR (typical)
◆85.3 dB at VREF = 3.3 V
◆90.6 dB at OSR = 8× rolling average oversampling, RES = 1
●2-bit resolution boost
●Out of range indicator (ALERT)
●High-speed serial interface
●−40°C to +125°C operation
●4 mm × 4 mm, 24-lead LFCSP
■GENERAL DESCRIPTION
●The AD7381-4 a 16-bit, quad, simultaneous sampling, high speed, successive approximation register (SAR), analog-to-digital converter (ADC) that operates from a 3.0 V to 3.6 V power supply and features throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and the analog inputs are sampled and converted on the falling edge of CS.
●The AD7381-4 has 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. A buffered internal 2.5 V reference (10 ppm/°C) is included.Alternatively, an external reference up to 3.3 V can be used.
●The conversion process and data acquisition use standard control inputs allowing for 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.
■PRODUCT HIGHLIGHTS
●Quad simultaneous sampling and conversion.
●Pin-compatible product family.
●High throughput rate, 4 MSPS at 14-bit.
●Space-saving, 4 mm × 4 mm LFCSP.
●Integrated oversampling block to increase dynamic range, reduce noise and reduce SCLK speed requirements.
●Differential analog inputs with wide common-mode range.
●Small sampling capacitor reduces amplifier drive burden.
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