器件名称: AD7264BCPZ-5
功能描述: 1 MSPS, 14-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators
文件大小: 1363.57KB 共32页
简 介:1 MSPS, 14-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators AD7264
FEATURES
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
FUNCTIONAL BLOCK DIAGRAM
AVCC VREFA
REF
BUF 14-BIT SUCCESSIVE APPROXIMATION ADC
AD7264
OUTPUT DRIVERS
VA+ VA–
PGA
T/H
DOUTA
CONTROL LOGIC
SCLK CAL CS REFSEL G0 G1 G2 G3 VDRIVE
VB+ VB–
PGA
T/H
14-BIT SUCCESSIVE APPROXIMATION ADC BUF
OUTPUT DRIVERS
DOUTB PD0/DIN PD1 PD2
VREFB CA_CBVCC CA+ CA– CB+ CB– CA_CB_GND CC_CDVCC CC+ CC– CD+ CD– CC_CD_GND COMP COMP OUTPUT DRIVERS OUTPUT DRIVERS COUTA COUTB
GENERAL DESCRIPTION
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 w……
