LTC2757 Description

The Analog Devices®2757 from Analog Devices is an 18-bit multiplying parallel-input, current-output digital-to-analog converter that provides full 18-bit performance—INL and DNL of ±1LSB maximum—over temperature without any adjustments. 18-bit monotonicity is guaranteed in all performance grades. This SoftSpan™ DAC operates from a single 3V to 5V supply and offers six output ranges (up to ±10V) that can be programmed through the parallel interface or pin-strapped for operation in a single range.

In addition to its precision DC specifications, the LTC2757 also offers excellent AC specifications, including 2.1μs full-scale settling to 1LSB and 1.4nV•s glitch impulse.

The LTC2757 uses a bidirectional input/output parallel interface that allows readback of any on-chip register, including DAC output-range settings; and a CLR pin and power-on reset circuit that reset the DAC outputs to 0V regardless of output range.

Linear LTC2757 Graph Image

Guaranteed ±1LSB INL & DNL Over Temperature

The Analog Devices® 2757 is the first monolithic 18-bit DAC to offer precision DC specifications of ±1LSB INL (max) and ±1LSB DNL (max). The Analog Devices® 2757 provides better than ±4ppm accuracy over four bipolar and two unipolar output ranges for precision adjustment in open loop applications. Excellent temperature drift and power supply rejection simplify system design.

Part Number Description  
LTC2757AILX#PBF 18-Bit Parallel Iout DAC with Softspan (1LSB INL) LTC2757AILX#PBF Product Page
LTC2757BILX#PBF 18-Bit Parallel Iout DAC with Softspan (2LSB INL) LTC2757BILX#PBF Product Page

Features

  • Program or Pin-Strap Six Output Ranges:
    0V to 5V, 0V to 10V, –2.5V to 7.5V, ±2.5V, ±5V, ±10V
  • 18-Bit Settling Time: 2.1μs
  • Glitch Impulse: 1.4nV•s (3V), 3nV•s (5V)
  • Output Noise: 14nV/√Hz with LT® 1468 Output Amp
  • 1MHz Reference Multiplying Bandwidth
  • Temperature Drift:
    • ±0.2 LSB INL Drift from –40°C to 85°C
    • ±0.25 ppm/°C Gain Drift
    • ±0.15 ppm/°C Bipolar Zero Drift
  • Power Supply Rejection: ±0.8 LSB/V
  • Voltage-Controlled Offset and Gain Trims
  • Parallel Interface with Readback of All Registers
  • Reset to 0V Regardless of Output Range
  • 2.7V to 5.5V Single Supply Operation
  • Maximum Supply Current: 1µA
  • 48-Pin 7mm × 7mm LQFP Package

Applications

  • ATE
  • Precision Instrumentation
  • Galvanometer Scanners
  • DAQ Modules
  • Calibration Equipment

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