AD5370

PRODUCTION

40-Channel, 16-Bit, Serial Input, Voltage-Output DAC

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Overview

  • 40-channel DAC in a 64-lead LFCSP and a 64-lead LQFP
  • Guaranteed monotonic to 16 bits
  • Maximum output voltage span of 4 × VREF (20 V)
  • Nominal output voltage span of −4 V to +8 V
  • Multiple, independent output spans available
  • System calibration function allowing user-programmable offset and gain
  • Channel grouping and addressing features
  • Thermal shutdown function
  • DSP/microcontroller-compatible serial interface
  • SPI serial interface
  • 2.5 V to 5.5 V digital interface
  • Digital reset (RESET)
  • Clear function to user-defined SIGGNDx
  • Simultaneous update of DAC outputs

The AD5370* contains forty 16-bit DACs in a single 64-lead LFCSP and a 64-lead LQFP. The device provides buffered voltage outputs with a span that is 4× the reference voltage. The gain and offset of each DAC channel can be independently trimmed to remove errors. For even greater flexibility, the device is divided into five groups of eight DACs. Three offset DAC channels allow the output range of blocks to be adjusted. Group 0 can be adjusted by Offset DAC 0, Group 1 can be adjusted by Offset DAC 1, and Group 2 to Group 4 can be adjusted by Offset DAC 2.

The AD5370 offers guaranteed operation over a wide supply range, with VSS from −16.5 V to −4.5 V and VDD from +9 V to +16.5 V. The output amplifier headroom requirement is 1.4 V operating with a load current of 1 mA.

The AD5370 has a high speed serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards and can handle clock speeds of up to 50 MHz.

The DAC registers are updated on receipt of new data. All the outputs can be updated simultaneously by taking the LDAC input low. Each channel has a programmable gain and an offset adjust register to allow removal of gain and offset errors.

Each DAC output is gained and buffered on chip with respect to an external SIGGNDx input. The DAC outputs can also be switched to SIGGNDx via the CLR pin.

Applications

  • Level setting in automatic test equipment (ATE)
  • Variable optical attenuators (VOA)
  • Optical switches
  • Industrial control systems
  • Instrumentation
* Protected by U.S. Patent No. 5,969,657; other patents pending.

 

AD5370
40-Channel, 16-Bit, Serial Input, Voltage-Output DAC
AD5370-fbl AD5370-pc
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Software Resources


Tools & Simulations

Precision DAC Error Budget Tool

The Precision DAC Error Budget Tool is a web application that calculates the DC Accuracy of precision DAC signal chains. It shows how the static errors accumulate throughout your signal chain to quickly evaluate the design tradeoffs. Calculations include the DC errors introduced by Voltage References, Operation Amplifiers and Precision DACs.

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Evaluation Kits

eval board
EVAL-AD5370

AD5370 Evaluation Board

Features and Benefits

  • Full Featured Evaluation Board
  • On Board Reference and Buffers
  • USB operation of IC
  • PC Software for control of DACs
  • Stand-alone operation

Product Details

The AD5370 evaluation board can be used as a stand alone board with control coming from an external DSP or micro-controller or it can be connected to a PC. Software is provided which can be used to program the registers of the AD536x. Control of the AD536x is achieved via a USB interface.

EVAL-AD5370
AD5370 Evaluation Board
EVAL-AD5370EBZANGLE-web EVAL-AD5370EBZBOTTOM-web EVAL-AD5370EBZTOP-web

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