AD7921ARMZ Multiplexed A/D Converters by Analog Devices

Multiplexed A/D Converters
Status: Production
Series: AD7921
RoHS: Compliant
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The AD7911 / AD7921 are 10-bit and 12-bit, high speed, low power, 2-channel, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 6 MHz. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. There are no pipeline delays associated with the part.The channel to be converted is selected through the DIN pin and the mode of operation is controlled by CS. The serial data stream from the DOUT pin has a channel identifier bit, which provides information about the channel converted.The AD7911 / AD7921 use advanced design techniques to achieve very low power dissipation at high throughput rates.The reference for the part is taken internally from VDD, therebyallowing the widest dynamic input range to the ADC. Theanalog input range for the part, therefore, is 0 to VDD. Theconversion rate is determined by the SCLK signal.PRODUCT HIGHLIGHTS 2-channel, 250 kSPS, 10-/12-bit ADCs in TSOT package. Low power consumption. Flexible power/serial clock speed management. The conversion rate is determined by the serial clock; conversion time is reduced when the serial clock speed is increased. The parts also feature a power-down mode to maximize power efficiency at lower throughput rates. Average power consumption is reduced when the power-down mode is used while not converting. Current consumption is 1 μA maximum and 50 nA typically when in power-down mode. Reference derived from the power supply. No pipeline delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control.

Where to Buy

Prices starting from US$4.37

Distributor Stock
Logo for Analog Devices
Analog Devices
from US$4.55
174
in stock
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Logo for Newark Electronics
Newark Electronics
from US$4.95
107
in stock
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Logo for element14
element14
from US$4.84
107
in stock
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Logo for Farnell
Farnell
from US$4.45
107
in stock
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Logo for Richardson RFPD
Richardson RFPD
from US$4.37
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Features

Specified for VDD of 2.35 V to 5.25 V
Low Power:
4 mW typ at 250 kSPS with 3 V Supplies
13.5 mW typ at 250 kSPS with 5 V Supplies
Wide Input Bandwidth:
71.5 dB Minimum SNR at 100 kHz Input Frequency
Flexible Power/Serial Clock Speed Management
Throughput Rate: 250 kSPS
No Pipeline Delays
High Speed Serial Interface SPI®/QSPI™/MICROWIRE™/DSP Compatible
Standby Mode: 1 µA max
8-Lead TSOT Package
8-Lead MSOP Package

Alternative Descriptions

Dual 12-Bit , 250KSPS ADC I.C. | Analog Devices
Adc, 12Bit, 250Ksps, Msop-8 | Newark Electronics
ADC, 12BIT, 250KSPS, MSOP-8 | element14
CONVERTER - ADC | Richardson RFPD

Frequently Asked Questions

Where can I find additional details, specifications and documents for a AD7921ARMZ?

Additional datasheets, footprints and schematics for AD7921ARMZ are listed on our Part Details page. You can also find images and similar parts to AD7921ARMZ on this page.

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Distributor pricing and stock information is available for AD7921ARMZ on our Product Comparison page. Access via the 'View Pricing & Stock' button to view AD7921ARMZ price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does AD7921ARMZ fall under?

The AD7921ARMZ is listed under Multiplexed A/D Converters.

Can I view similar or alternative parts?

You can view similar parts to AD7921ARMZ when available in the Multiplexed A/D Converters range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the AD7921ARMZ you can contact the distributor directly for product support, shipping queries etc.

Is the AD7921ARMZ RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for AD7921ARMZ have stock available?

Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and Richardson RFPD have stock available or on a lead time for AD7921ARMZ.

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