●Product Details
●The AD7634 is an 18-bit charge redistribution successive approximation register (SAR), architecture analog-to- digital converter (ADC) fabricated on Analog Devices, Inc.’s _i_CMOS high voltage process. The device is configured through hardware or via a dedicated write-only serial configuration port for input range and operating mode. The AD7634 contains a high speed 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. A falling edge on CNVST samples the fully differential analog inputs on IN+ and IN−. The AD7634 features four different analog input ranges and three different sampling modes. Operation is specified from −40°C to +85°C.
●Applications
● CT scanners
● High dynamic data acquisition
● Σ-Δ replacement
● Spectrum analysis
● Medical instruments
● Instrumentation Process controls
●### Features and Benefits
● Multiple pins/software-programmable input ranges
●5 V (10 V p-p), +10 V (20 V p-p),
●±5 V (20 V p-p),
●±10 V (40 V p-p)
● Pins or serial SPI®-compatible input ranges/mode selection
● Throughput
●670 kSPS (warp mode)
●570 kSPS (normal mode)
●450 kSPS (impulse mode)
● 18-bit resolution with no missing codes
● INL: ±1.5 LSB typical, ±2.5 LSB maximum (±9.5 ppm of FSR)
● Dynamic range: 102.5 dB
● SNR: 101 dB @ 2 kHz
● THD: −112 dB @ 2kHz
● _i_CMOS® process technology
● 5 V internal reference: typical drift 3 ppm/°C; TEMP output
● No pipeline delay (SAR architecture)
● Parallel (18-/16-/8-bit bus) and serial 5 V/3.3 V interface
