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AD7265:  Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR A/D Converter

Product Details


The AD7265 is a dual, 12-bit, high speed, low power, successive approximation ADC that operates from a single 2.7 V to 5.25 V power supply and features throughput rates of up to 1 MSPS. The device contains two ADCs, each preceded by a 3-channel multiplexer, and a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 30 MHz.

The conversion process and data acquisition use standard control inputs allowing easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS; conversion is also initiated at this point. The conversion time is determined by the SCLK frequency. The AD7265 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 5 V supplies and a 1 MSPS throughput rate, the part consumes 4 mA maximum. The part also offers flexible power/throughput rate management when operating in normal mode, because the quiescent current consumption is so low.

The analog input range for the part can be selected to be a 0 V to VREF(or 2 × VREF) range, with either straight binary or twos complement output coding. The AD7265 has an on-chip 2.5 V reference that can be overdriven when an external reference is preferred. This external reference range is 100 mV to VDD. The AD7265 is available in 32-lead LFCSP and 32-lead TQFP.

Product Highlights

  1. Two Complete ADC Functions Allow Simultaneous Sampling and Conversion of Two Channels. Each ADC has three fully/pseudo differential pairs, or six single-ended channels, as programmed. The conversion result of both channels is simultaneously available on separate data lines, or in succession on one data line if only one serial port is available.
  2. High Throughput with Low Power Consumption. The AD7265 offers a 1 MSPS throughput rate with 9 mW maximum power dissipation when operating at 3 V.
  3. The AD7265 offers both a standard 0 V to VREF input range and a 2 × V REF input range.
  4. No Pipeline Delay. The part features two standard successive approximation ADCs with accurate control of the sampling instant via a CS input and once off conversion control.

FEATURES and BENEFITS

  • Dual 12-bit, 3-channel ADC
  • Throughput rate: 1 MSPS
  • Specified for VDD of 2.7 V to 5.25 V
  • Power consumption
    7 mW at 1 MSPS with 3 V supplies
    17 mW at 1 MSPS with 5 V supplies
  • Pin-configurable analog inputs
    12-channel single-ended inputs
    6-channel fully differential inputs
    6-channel pseudo differential inputs
  • 70 dB SINAD at 50 kHz input frequency
  • Accurate on-chip reference: 2.5 V
    ±0.2% maximum @ 25°C, 20 ppm/°C maximum
  • Dual conversion with read 875 ns, 16 MHz SCLK
  • High speed serial interface
    SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
  • −40°C to +125°C operation
  • Shutdown mode: 1 μA maximum
  • 32-lead LFCSP and 32-lead TQFP

Functional Block Diagram for AD7265

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Design Tools,Models,Drivers & Software

Title Content Type File Type
AD7266 Differential/Single-Ended Input, Dual, Simultaneous Sampling, 2 MSPS, 12-Bit, 3-Channel SAR A/D Converter Linux Driver Device Drivers HTML

Evaluation Kits & Symbols & Footprints

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Companion Products

Suggested Companion Products


Recommended ADC Drivers for the AD7265
  • In DC coupled applications, we recommend the AD8138 or the ADA4932-1 differential amplifier.
  • For a single ended to differential driver, we suggest the dual AD8022 or the ADA4899-2.
Recommended High Accuracy, Precision References - 2.5V for the AD7265
  • For applications requiring the lowest noise performance and output trim adjust, we recommend the ADR441.
  • For high accuracy, low noise, low temperature drift, we recommend the ADR431 or the ADR4525.

Recommended Digital Isolators for the AD7265

Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7265 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7265BCPZ Status: Production 32 ld LFCSP (5x5mm CP-32-2) 32 Ind Tray, 490 $3.57 $3.00 Y  Material Info PCN Purchase Sample
AD7265BCPZ-REEL Status: Last Time Buy 32 ld LFCSP (5x5mm CP-32-2) 32 Ind Reel, 5000 - $3.00 Y  Material Info PDN Purchase
AD7265BCPZ-REEL7 Status: Production 32 ld LFCSP (5x5mm CP-32-2) 32 Ind Reel, 1500 - $3.00 Y  Material Info PCN Purchase
AD7265BSUZ Status: Production 32 ld TQFP (7x7x1.0mm) 32 Ind Tray, 250 $3.72 $3.14 Y  Material Info PCN Purchase Sample
AD7265BSUZ-REEL Status: Production 32 ld TQFP (7x7x1.0mm) 32 Ind Reel, 2000 - $3.14 Y  Material Info PCN Purchase
AD7265BSUZ-REEL7 Status: Production 32 ld TQFP (7x7x1.0mm) 32 Ind Reel, 500 - $3.14 Y  Material Info PCN Purchase
Price Table Help

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.

AD7265 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7265EDZ Status: Production Evaluation Board $59.00 Yes -
EVAL-CED1Z Status: Production Evaluation Board $249.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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