- 'AD7091R', a 12-bit 1-MSPS SAR A/D converter with an internal 2.5V reference circuit
- Optimized motion and static power design support for industrial and medical equipment designers

September 6, 2012 – Analog Devices ( www.analog.com , NASDAQ: ADI), a global leader in high-performance signal processing technology and data converters, today introduced the first product in a series of ultra-low-power 12-bit 1-Mega Sample Per Second (MSPS) Successive Approximation Register (SAR) A/D converters with integrated internal 2.5V reference circuitry. The new A/D converters are designed for data acquisition (DAQ) modules using Universal Serial Bus (USB) or battery power, handheld meters, field instruments, energy harvesting applications, and medical devices (e.g., portable ECGs and heart rate monitors). This product, which is the most power-efficient converter in its class, has a package size that is 33% smaller than a competitor's 12-bit converter with an internal reference circuit and consumes more than 70% less power than a competitor's SAR A/D converter with the closest performance.

Mike Britchfield, Vice President of the Industrial and Instrumentation Group at Analog Devices, stated, “The AD7091R offers more than 3.5 times higher power efficiency than competitor A/D converters as well as alternatives consisting of two chips of discrete ADC and reference circuitry,” adding, “This exceptional power performance advantage is designed for system engineers developing products with extremely limited system power consumption.”

The AD7091R core consumes 349μA (typ) at 3V when operating at 1MSPS, and power consumption changes automatically based on the sampling rate. Since it consumes 264nA of power-down current and 21.6µA of standby current, designers can further optimize energy consumption for intermittent data conversion or one-shot conversion. This new device has a reference temperature factor of 4.5ppm/˚C.

Key specifications of the AD7091R 12-bit A/D converter
• Low power consumption:
o Generally 349µA (at 3V, 1MSPS)
o Power-down current of 264nA
o Standby current of 21.6µA
• Flexible power/processing speed management
• High-speed processing: 1MSPS
• Power supply: 2.7V~5.25V
• DC Accuracy: ±1 LSB INL
• 4.5ppm/˚C, 2.5V internal reference
• High-speed serial interface: SPI®/QSPI™/MICROWIRE™/DSP compatible
• Serial interface voltage: 1.65V~5.25V

mso-width-source: userset; mso-width-alt: 3200" width=100> BORDER-TOP: black 0.5pt solid; BORDER-RIGHT: black 0.5pt solid" class=xl31239 width=102> Operating temperature rangeD-COLOR: transparent; WIDTH: 80pt; BORDER-TOP: black; BORDER-RIGHT: #f0f0f0" class=xl31246 width=107> 2.15"HEIGHT: 13.5pt" height=18>

product	Sample supply	Mass production supply	Price per 1,000	Package
alog-to-digital-converters/ad-converters/ad7091r/products/product.html" target=_blank> AD7091R	Supplying	Supplying	–40°C to +125°C	10-Lead MSOP
				dollar	5mm × 3mm,
					10-Lead LFCSP
					EN-US> 3mm × 2mm

Price, supply, and complementary products

The EVAL-AD7091RSDZ evaluation board for the AD7091R is currently available for $59.00. The EVAL-SDP-CB1Z controller board must be ordered together with the evaluation board, and the price is $99.00.
IBIS models and software drivers are provided for easy design-in. When used with low-power amplifiers, the AD7091R A/D converter operates as part of a chipset that reduces signal chain power consumption. Additionally, when used with the rail-to-rail input and output AD8031 operational amplifier, power consumption can be reduced by more than 45% compared to previous products. For low-band applications, using the AD7091R A/D converter and the AD8420 industrial amplifier together can create an economical solution that reduces power consumption by more than 60% compared to previous solutions.

• Check AD7091R A/D Converter product information, order samples, and download datasheets: http://www.analog.com/AD7091R
• Check out the new AD7091R A/D converter introduction video: http://www.analog.com/AD7091R_video
• AD7091R Circuits from the Lab™ Check Reference Circuit (CN-0247): http://www.analog.com/CN0247
• Get support from EngineerZone™, ADI's online technical support community: http://www.analog.com/ezzone_precision_adcs