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AD7840:  Complete 14-Bit CMOS DAC

Product Details


Newer Alternatives:
  • AD5531 Serial Input, Voltage Output 14-Bit D/A Converter

The AD7840 is a fast, complete 14-bit voltage output D/A converter. It consists of a 14-bit DAC, 3V buried Zener reference, DAC output amplifier and high speed control logic.

The part features double-buffered interface logic with a 14-bit input latch and 14-bit DAC latch. Data is loaded to the input latch in either of two modes, parallel or serial. This data is then transferred to the DAC latch under control of an a asynchronous LDAC signal. A fast data setup time of 21ns allows direct parallel interfacing to digital signal processors and high speed 16-bit microprocessors. In the serial mode, the maximum serial data clock rate can be as high as 6Mhz.

The analog output from the AD7840 provides a bipolar output range of +-3V. The AD7840 is fully specified for dynamic performance parameters such as signal-to-noise ratio and harmonic distortion as well as for traditional dc specifications. Full power output signals up to 20kHz can be created.

The AD7840 is fabricated in linear compatible CMOS (LC2MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic. The part is available in a 24-pin plastic and hermetic dual-in-line packaged (DIP) and is also packaged in 28-terminal plastic leaded chip carrier (PLCC).

FEATURES and BENEFITS

  • Complete 14-Bit Voltage Output DAC
  • Parallel and Serial Interface Capability
  • 80 dB Signal-to-Noise Ratio
  • Interfaces to High Speed DSP Processors
    e.g. ADSP-2100, TMS32010, TMS32020
  • 45 ns min WR Pulse Width
  • Interfaces to High Speed
    DSP Processors
    e.g. ADSP-2100, TMS32010,
    TMS32020
  • Low Power- 70 mW typ
  • Operates from ±5 V Supplies

Functional Block Diagram for AD7840

Similar Products

  • AD5531 Serial Input, Voltage Output14-Bit D/A Converter
  • AD5570 True Accuracy, 16-Bit ±12 V/±15 V, Serial Input Voltage Output D/A Converter
  • AD5760 Ultra Stable 16-Bit ±0.5 LSB INL, Voltage Output DAC

Documentation

Title Content Type File Type
AD7840: Complete 14-Bit CMOS DAC Data Sheet  (Rev B, 02/1989) (pdf, 337 kB) Data Sheets PDF
Space Qualified Parts List  (pdf, 93 kB)
This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
Aerospace Information PDF
Digital to Analog Converters ICs Solutions Bulletin  (pdf) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD7840 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7840ARS Status: Production 24 ld SSOP 24 Ind Tube, 59 $16.24 $13.20 N  Material Info PCN Purchase
AD7840ARS-REEL Status: Production 24 ld SSOP 24 Ind Reel, 1500 - $13.20 N  Material Info PCN Purchase
AD7840ARSZ Status: Production 24 ld SSOP 24 Comm. Tube, 59 $14.80 $12.02 Y  Material Info PCN Purchase
AD7840ARSZ-REEL Status: Production 24 ld SSOP 24 Comm. Reel, 1500 - $12.62 Y  Material Info PCN Purchase
AD7840JN Status: Production 24 ld PDIP 24 Comm. Tube, 15 $14.12 $12.00 N  Material Info PCN Purchase
AD7840JNZ Status: Production 24 ld PDIP 24 Comm. Tube, 15 $12.86 $10.93 Y  Material Info PCN Purchase
AD7840JP Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $16.24 $13.20 N  Material Info PCN Purchase
AD7840JP-REEL Status: Last Time Buy PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $12.00 N  Material Info PCN/PDN Purchase
AD7840JPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $14.80 $12.02 Y  Material Info PCN Purchase
AD7840JPZ-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $12.00 Y  Material Info PCN Purchase
AD7840KNZ Status: Production 24 ld PDIP 24 Comm. Tube, 15 $15.42 $13.11 Y  Material Info PCN Purchase
AD7840KP Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $19.48 $15.83 N  Material Info PCN Purchase
AD7840KP-REEL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 - $14.42 N  Material Info PCN Purchase
AD7840KPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Tube, 39 $16.90 $13.73 Y  Material Info PCN Purchase
AD7840KPZ-RL Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Comm. Reel, 750 $16.90 $13.73 Y  Material Info PCN Purchase
AD7840SQ/883B Status: Production CERDIP GLASS SEAL 24 Mil Tube, 15 $81.84 $73.65 N  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.


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