1. Products
  2. A/D Converters (ADC)
  3. Precision A/D Converters
  4. Multiplexed A/D Converters
  5. MX7705


Overview

Features and Benefits

  • Pin Compatible and Software Compatible with the AD7705
  • 16-Bit Sigma-Delta ADC
  • Two Fully Differential Input Channels
  • 0.003% Integral Nonlinearity with No Missing Codes
  • Interface with Schmitt Triggers on Inputs
  • Internal Analog Input Buffers
  • PGA from 1 to 128
  • Single (2.7V to 3.6V) or (4.75V to 5.25V) Supply
  • Low Power
    • 1mW (max), 3V Supply
    • 2µA (typ) Power-Down Current
  • SPI-/QSPI-/MICROWIRE-Compatible 3-Wire Serial Interface

Product Details

The MX7705 low-power, 2-channel, serial-output analog-to-digital converter (ADC) includes a sigma-delta modulator with a digital filter to achieve 16-bit resolution with no missing codes. This ADC is pin compatible and software compatible with the AD7705. The MX7705 features an on-chip input buffer and programmable-gain amplifier (PGA). The device offers an SPI-/QSPI™-/MICROWIRE ®-compatible serial interface.

The MX7705 operates from a single 2.7V to 5.25V supply. The operating supply current is 320µA (typ) with a 3V supply. Power-down mode reduces the supply current to 2µA (typ).

Self-calibration and system calibration allow the MX7705 to correct for gain and offset errors. Excellent DC performance (±0.003% FSR INL) and low noise (650nV) make the MX7705 ideal for measuring low-frequency signals with a wide dynamic range. The device accepts fully differential bipolar/unipolar inputs. An internal input buffer allows for input signals with high source impedances. An on-chip digital filter, with a programmable cutoff and output data rate, processes the output of the sigma-delta modulator. The first notch frequency of the digital filter is chosen to provide 150dB rejection of common-mode 50Hz or 60Hz noise and 98dB rejection of normal-mode 50Hz or 60Hz noise. A PGA and digital filtering allow signals to be directly acquired with little or no signal-conditioning requirements.

The MX7705 is available in a 16-pin TSSOP package.

Applications

  • Flow and Gas Meters
  • Industrial Instruments
  • Loop-Powered Systems
  • Medical Instrumentation
  • Pressure Transducers
  • RTD Measurements
  • Strain-Gauge Measurements
  • Thermocouple Measurements
  • Weigh Scales

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

MX7705 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MX7705EPE+ Material Declaration Reliability Data Plastic Dual-In-Line, Narrow (0.3in)
MX7705EUE+ Material Declaration Reliability Data 16-TSSOP_4.4-4.4_MM
MX7705EUE+T Material Declaration Reliability Data 16-TSSOP_4.4-4.4_MM
MX7705EWE+ Material Declaration Reliability Data Small-Outline IC, Wide (0.3in)
MX7705EWE+T Material Declaration Reliability Data Small-Outline IC, Wide (0.3in)
Wafer Fabrication Data

PCN-PDN Information

Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

Sample & Buy


Ordering FAQs


See our Ordering FAQs for answers to questions about online orders, payment options and more.

 

Buy Now Pricing


(**) Displayed Buy Now Price and Price Range is based on small quantity orders.

 

List Pricing


(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

 

Lead Times


Please see the latest communication from our CCO regarding lead times.

 

Sampling


A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help