The AD7854/AD7854L is a high speed, low power, 12-bit ADC that operates from a single 3 V or 5 V power supply, the AD7854 being optimized for speed and the AD7854L for low power. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power-down options for low power applications.
The AD7854 is capable of 200 kHz throughput rate while the AD7854L is capable of 100 kHz throughput rate. The input track-and-hold acquires a signal in 500 ns and features a pseudo-differential sampling scheme. The AD7854 and AD7854L input voltage range is 0 to VREF (unipolar) and -VREF/2 to +VREF/2, centered at VREF/2 (bipolar). The coding is straight binary in unipolar mode and twos complement in bipolar mode. Input signal range is to the supply and the part is capable of converting full-power signals to 100 kHz.
CMOS construction ensures low power dissipation of typically 5.4 mW for normal operation and 3.6 µW in power-down mode. The part is available in 28-pin, 0.6 inch wide dual-in-line package (DIP), 28-lead small outline (SOIC) and 28-lead small shrink outline (SSOP) packages.
Features and Benefits12-Bit Parallel/8-Bit Parallel (AD7854) - Normal Operation AD7854: 15 mW (VDD = 3 V) AD7854L: 5.5 mW (VDD = 3 V) - Automatic Power-Down After Conversion (25 µW) AD7854: 1.3 mW 10 kSPS AD7854L: 650 µW 10 kSPS | Analog to Digital Converters |
Document | note |
AD7854: 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs Data Sheet (Rev. B) | PDF 264 kB |
Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
---|---|---|---|---|---|---|
AD7854AQ Last Time Buy | CERDIP GLASS SEAL | OTH 12 | -40 to 85C | 0 | 0 | N |
AD7854AR Last Time Buy | 28 ld SOIC - Wide | OTH 27 | -40 to 85C | 0 | 0 | N |
AD7854ARS Production | 28 ld SSOP | OTH 47 | -40 to 85C | 0 | 0 | N |
AD7854ARSZ Production | 28 ld SSOP | OTH 47 | -40 to 85C | 13.19 | 11.07 | Y |
AD7854ARZ Production | 28 ld SOIC - Wide | OTH 27 | -40 to 85C | 13.19 | 11.07 | Y |
AD7854ARZ-REEL Production | 28 ld SOIC - Wide | REEL 1000 | -40 to 85C | 0 | 11.07 | Y |
AD7854LARSZ Production | 28 ld SSOP | OTH 47 | -40 to 85C | 8.39 | 7.04 | Y |
AD7854LARSZ-REEL Production | 28 ld SSOP | REEL 1500 | -40 to 85C | 0 | 7.04 | Y |
AD7854LARZ Last Time Buy | 28 ld SOIC - Wide | OTH 27 | -40 to 85C | 8.8 | 7.39 | Y |