器件名称: AD7262BCPZ-5
功能描述: 1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators
文件大小: 920.88KB 共32页
简 介:1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators AD7262
FEATURES
Dual simultaneous sampling 12-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 AD7262 500 kSPS for AD7262-5 Analog input impedance: >1 GΩ Wide input bandwidth 3 dB bandwidth: 1.7 MHz at gain = 2 4 on-chip comparators SNR: 73 dB typical at gain = 2, 66 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 SPI/QSPI/MICROWIRE/DSP compatible 48-lead LFCSP and LQFP packages
FUNCTIONAL BLOCK DIAGRAM
AVCC VREF A
REF
BUF 12-BIT SUCCESSIVE APPROXIMATION ADC
AD7262
OUTPUT DRIVERS
VA + VA–
PGA
T/H
DOUTA
CONTROL LOGIC
SCLK CAL CS REFSEL G0 G1 G2 G3 VDRIVE OUTPUT DRIVERS DOUTB PD0/DIN PD1 PD2
VB+ VB–
PGA
T/H
12-BIT SUCCESSIVE APPROXIMATION ADC BUF
VREF B 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 AD7262/AD7262-5 are dual, 12-bit, high speed, low power, successive approximation ADCs that operate from a single 5 V power supply. The AD7262 features throughput rates of up to 1 MSPS per on-chip ADC. The AD7262-5 features throughput rates of up to 500 kSPS. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is precede……
