Product Summary

The AD7674AST is an 18-bit, 800 kSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates on a single 5 V power supply. The AD7674AST contains a high speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. The applications of the AD7674AST include: CT scanners, High dynamic data acquisition, Geophone and hydrophone sensors, ∑-△ replacement (low power, multichannel), Instrumentation, Spectrum analysis, Medical instruments.

Parametrics

AD7674AST absolute maxing ratings: (1)Analog Inputs IN+2, IN–2, REF, REFBUFIN, REFGND to AGND: AGND – 0.3 V to AVDD + 0.3 V; (2)Ground Voltage Differences AGND, DGND, OGND: ±0.3 V; (3)Supply Voltages AVDD, DVDD, OVDD: –0.3 V to +7 V; (4)Internal Power Dissipation: 700 mW; (5)Internal Power Dissipation: 2.5 W; (6)Junction Temperature: 150℃; (7)Storage Temperature Range: –65℃ to +150℃; (8)Lead Temperature Range(Soldering 10 sec): 300℃.

Features

AD7674AST features: (1)18-bit resolution with no missing codes; (2)No pipeline delay (SAR architecture); (3)Differential input range: ±VREF (VREF up to 5 V); (4)Throughput: 800 kSPS (Warp mode), 666 kSPS (Normal mode), 570 kSPS (Impulse mode); (5)INL: ±2.5 LSB max (±9.5 ppm of full scale); (6)Dynamic range: 103 dB typ (VREF = 5 V); (7)S/(N+D): 100 dB typ @ 2 kHz (VREF = 5 V); (8)Parallel (18-,16-, or 8-bit bus) and serial 5 V/3 V interface; (9)SPI/QSPI/MICROWIRE/DSP compatible; (10)On-board reference buffer; (11)Single 5 V supply operation; (12)Power dissipation: 98 mW typ @ 800 kSPS, 78 mW typ@ 500 kSPS (Impulse mode), 160 μW @ 1 kSPS (Impulse mode); (13)48-lead LQFP or 48-lead LFCSP package.

Diagrams

AD7674AST block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
AD7674AST
AD7674AST

Analog Devices Inc

IC ADC 18BIT 800KSPS 48-LQFP

Data Sheet

Negotiable 
AD7674ASTRL
AD7674ASTRL

Analog Devices Inc

IC ADC 18BIT SAR 5V 48-LQFP T/R

Data Sheet

Negotiable 
AD7674ASTZ
AD7674ASTZ


IC ADC 18BIT 800KSPS 48-LQFP

Data Sheet

0-1: $28.26
1-10: $26.43
10-100: $22.91
100-250: $21.39
250-500: $20.37
AD7674ASTZRL
AD7674ASTZRL


IC ADC 18BIT 800KSPS 48-LQFP T/R

Data Sheet

0-2000: $20.37