AD7490:  16-Channel, 1MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP

The AD7490 is a 12-bit high speed, low power, successive- approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The part contains ...More

AD7490:  16-Channel, 1MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP

Product Description

The AD7490 is a 12-bit high speed, low power, successive- approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The part contains a low-noise, wide bandwidth track/hold amplifier that can handle input frequencies in excess of 1 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the device to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is also initiated at this point. There are no pipeline delays associated with the part.

The AD7490 uses advanced design techniques to achieve very low power dissipation at high throughput rates. For maximum throughput rates, the AD7490 consumes just 1.8 mA with 3 V supplies, and 2.5 mA with 5 V supplies. By setting the relevant bits in the control register, the analog input range for the part can be selected to be a 0 V to REFIN input or a 0 V to 2 × REFIN input, with either straight binary or twos complement output coding. The AD7490 features 16 single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequen-tially. The conversion time is determined by the SCLK or twos complement output coding. The AD7490 features 16 single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequen-tially. The conversion time is determined by the SCLK.

Features

  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 2.7 V to 5.25 V
  • Low power at maximum throughput rates
    5.4 mW maximum at 870 kSPS with 3 V supplies
    12.5 mW maximum at 1 MSPS with 5 V supplies
  • 16 (single-ended) inputs with sequencer
  • Wide input bandwidth 69.5 dB SNR at 50 kHz input frequency
  • Flexible Power/Serial Clock Speed Management
  • No Pipeline Delays
  • High Speed Serial Interface
    SPI/QSPI™/µWire™/DSP Compatible
  • Full shutdown mode: 0.5 μA maximum
  • 28-lead TSSOP and 32-lead LFCSP packages

Diagrams

AD7490 Diagram
Functional Block Diagram for AD7490

Specifications

Resolution (Bits) 12bit
T-Put Rate 1MSPS
# Chan 16
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss 12.5mW
Interface Ser,SPI
Ain Range Uni (Vref),Uni (Vref) x 2
SNR (dB) 69.5dB
Pkg Type CSP,SOP

AD7357 - Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

AD7780 - 24-Bit Pin-Programmable Low Power Σ−Δ ADC

AD7781 - 20-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

AD7192 - 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7490 12 1MSPS 16 12.5mW
AD5590 12 1MSPS 16 42.3mW
AD7450 12 1MSPS 1 1.3mW
AD7450A 12 1MSPS 1 9mW
AD7475 12 1MSPS 1 10.5mW
AD7472 12 1.5MSPS 1 12mW
AD7451 12 1MSPS 1 9.25mW
AD7265 12 1MSPS 12 21mW
AD7266 12 2MSPS 12 33.6mW
AD7440 10 1MSPS 1 9mW
AD7470 10 1.75MSPS 1 12mW
Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

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  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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