AD7705BRZ Datasheet

Data Acquisition - Analog to Digital Converters (ADC)


The AD7705BRZ /AD7706 are complete analog front ends for low frequency measurement applications. These 2-/3-channel devices can accept low level input signals directly from a transducer and produce serial digital output. The devices employ a Σ-Δ conversion technique to realize up to 16 bits of no missing codes performance. The selected input signal is applied to a proprietary, programmable-gain front end based around an analog modulator. The modulator output is processed by an onchip digital filter. The first notch of this digital filter can be programmed via an on-chip control register, allowing adjustment of the filter cutoff and output update rate.The AD7705BRZ/AD7706 devices operate from a single 2.7 V to 3.3 V or 4.75 V to 5.25 V supply. The AD7705 features two fully differential analog input channels; the AD7706 features three pseudo differential input channels.Both devices feature a differential reference input. Input signal ranges of 0 mV to 20 mV through 0 V to 2.5 V can be incorporated on both devices when operating with a VDD of 5 V and a reference of 2.5 V. They can also handle bipolar input signal ranges of ±20 mV through ±2.5 V, which are referenced to the AIN(−) inputs on the AD7705BRZ and to the COMMON input on the AD7706.The AD7705BRZ/AD7706 devices, with a 3 V supply and a 1.225 V reference, can handle unipolar input signal ranges of 0 mV to 10 mV through 0 V to 1.225 V. The devices can accept bipolar input ranges of ±10 mV through ±1.225 V. Therefore, the AD7705BRZ/AD7706 devices perform all signal conditioning and conversion for a 2-channel or 3-channel system.The AD7705BRZ/AD7706 are ideal for use in smart, microcontroller,or DSP-based systems. The devices feature a serial interface that can be configured for 3-wire operation. Gain settings, signal polarity, and update rate selection can be configured in software using the input serial port. The parts contains self-calibration and system calibration options to eliminate gain and offset errors on the part itself or in the system. CMOS construction ensures very low power dissipation, and the power-down mode reduces the standby power consumption to 20 μW typ.These parts are available in a 16-lead, wide body (0.3 inch),plastic dual in-line package (DIP); a 16-lead, wide body (0.3 inch), standard small outline (SOIC) package; and a low profile, 16-lead, thin shrink small outline package (TSSOP). AD7705BRZ Features • AD7705BRZ: 2 fully differential input channel ADCs• AD7706: 3 pseudo differential input channel ADCs 16 bits no missing codes 0.003% nonlinearity• Programmable gain front end: gains from 1 to 128• 3-wire serial interface SPI®-, QSPI™-, MICROWIRE™-, and DSP-compatible Schmitt-trigger input on SCLK• Ability to buffer the analog input• 2.7 V to 3.3 V or 4.75 V to 5.25 V operation• Power dissipation 1 mW maximum @ 3 V• Standby current 8 μA maximum• 16-lead PDIP, 16-lead SOIC, and 16-lead TSSOP packages


[{"Name":"Number of Bits","Value":"16"},{"Name":"Sampling Rate (Per Second)","Value":"500"},{"Name":"Number of Converters","Value":"1"},{"Name":"Power Dissipation (Max)","Value":"1mW"},{"Name":"Voltage Supply Source","Value":"Single Supply"},{"Name":"Operating Temperature","Value":"-40°C ~ 85°C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

Warm Hint

What HQEW.NET can offer here?
1. www.hqew.net/product-data provides numerous and various electronic part data-sheet and technology document here., if it can't be shown, Please feel free to ask us for it.
2. www.hqew.net/news provides the latest information of the semiconductor industry or the electronics industry for you.
3. www.hqew.net provides verified suppliers and numerous electronic components for your demand and business.
Any questions you can contact us by email cs@hqew.net.
Request for Datasheet

  • Part No     :
  • Your Email:
  • Content     :

related datasheet
Browse Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9
Contact Us


One to One Customer Service