Product Details
●The AD7264 is a dual, 14-bit, high speed, low power, successive approximation ADC that operates from a single 5 V power supply and features throughput rates of up to 1 MSPS per on-chip ADC (500 kSPS for the AD7264-5). Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential analog input with a PGA. There are 14 gain settings available: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128.
●The AD7264 contains four comparators. Comparator A and Comparator B are optimized for low power, whereas Comparator C and Comparator D have fast propagation delays. The AD7264 features a calibration function to remove any device offset error and programmable gain adjust registers to allow input path (for example, sensor) offset and gain compensation. The AD7264 has an on-chip 2.5 V reference that can be disabled if an external reference is preferred. The AD7264 is available in 48-lead LFCSP and LQFP packages.
●The AD7264 is ideally suited for monitoring small amplitude signals from a variety of sensors. The devices include all the functionality needed for monitoring the position feedback signals from a variety of analog encoders used in motor control systems.
●Product Highlights
● 1. Integrated PGA with a variety of flexible gain settings to allow detection and conversion of low level analog signals.
● 2. Each PGA is followed by a dual simultaneous sampling ADC, featuring throughput rates of 1 MSPS per ADC (500 kSPS for the AD7264-5). The conversion result of both ADCs is simultaneously available on separate data lines or in succession on one data line if only one serial port is available.
● 3. Four integrated comparators that can be used to count signals from pole sensors in motor control applications.
● 4. Internal 2.5 V reference.
●### Features and Benefits
● Dual, simultaneous sampling, 14-bit, 2-channel ADC
● True differential analog inputs
● Programmable gain stage: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, ×128
● Throughput rate per ADC
● 1 MSPS for AD7264
● 500 kSPS for AD7264-5
● Analog input impedance: >1 GΩ
● Wide input bandwidth
● −3 dB bandwidth: 1.7 MHz at gain = 2
● 4 on-chip comparators
● SNR: 78 dB typical at gain = 2, 71 dB typical at gain = 32
● Device offset calibration
● System gain calibration
● On-chip reference: 2.5 V
● −40°C to +105°C operation
● High speed serial interface
● Compatible with SPI, QSPI™, MICROWIRE™, and DSP
● 48-lead LFCSP and LQFP packages
