AD7705
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AD7705

3V/5V, 1 mW, 2-Channel Differential, 16-Bit Sigma-Delta ADC

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 7
1ku List Price Starting From $6.50
Features
  • Two Fully Differential Input Channel ADCs
  • Programmable Gain Front End Gains from 1 to 128
  • Three-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 max @ 3 V
  • Standby Current 8 µA max
  • 16-Lead DIP, 16-Lead SOIC and TSSOP Packages
Additional Details
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The AD7705 / 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 on-chip 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 AD7705 / 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 AD7705 and to the COMMON input on the AD7706.

The AD7705 / 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 AD7705 / AD7706 devices perform all signal conditioning and conversion for a 2-channel or 3-channel system.

The AD7705 / 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).

Part Models 7
1ku List Price Starting From $6.50

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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AD7705BRUZ
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AD7705BRUZ-REEL
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AD7705BRUZ-REEL7
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AD7705BRZ
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Product Lifecycle

PCN

Jul 21, 2023

- 23_0082

Qualification of Alternate Wafer Fab Site at ADI Limerick for Select ADC Products

AD7705BNZ

PRODUCTION

AD7705BRUZ

PRODUCTION

AD7705BRUZ-REEL

PRODUCTION

AD7705BRUZ-REEL7

PRODUCTION

AD7705BRZ

PRODUCTION

AD7705BRZ-REEL

PRODUCTION

AD7705BRZ-REEL7

PRODUCTION

Mar 29, 2021

- 21_0033

Assembly Site Transfer for 14/16L 300_MIL PDIP to Cirtek

Aug 19, 2009

- 07_0024

Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad

Apr 5, 2021

- 21_0035

Amkor Philippines as an Alternate Site for TSSOP_4.4

AD7705BRUZ

PRODUCTION

AD7705BRUZ-REEL

PRODUCTION

AD7705BRUZ-REEL7

PRODUCTION

Jan 20, 2012

- 11_0218

Halogen Free Material Change for Certain TSSOP Products at Carsem

AD7705BRUZ

PRODUCTION

AD7705BRUZ-REEL

PRODUCTION

AD7705BRUZ-REEL7

PRODUCTION

Aug 4, 2010

- 10_0117

Halogen Free Material Change for SOIC_W Products at Carsem

AD7705BRZ

PRODUCTION

AD7705BRZ-REEL

PRODUCTION

AD7705BRZ-REEL7

PRODUCTION

Feb 8, 2010

- 04_0080

Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jul 21, 2023

- 23_0082

arrow down

Qualification of Alternate Wafer Fab Site at ADI Limerick for Select ADC Products

AD7705BNZ

PRODUCTION

AD7705BRUZ

PRODUCTION

AD7705BRUZ-REEL

PRODUCTION

AD7705BRUZ-REEL7

PRODUCTION

AD7705BRZ

PRODUCTION

AD7705BRZ-REEL

PRODUCTION

AD7705BRZ-REEL7

PRODUCTION

Mar 29, 2021

- 21_0033

arrow down

Assembly Site Transfer for 14/16L 300_MIL PDIP to Cirtek

Aug 19, 2009

- 07_0024

arrow down

Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad

Apr 5, 2021

- 21_0035

arrow down

Amkor Philippines as an Alternate Site for TSSOP_4.4

AD7705BRUZ

PRODUCTION

AD7705BRUZ-REEL

PRODUCTION

AD7705BRUZ-REEL7

PRODUCTION

Jan 20, 2012

- 11_0218

arrow down

Halogen Free Material Change for Certain TSSOP Products at Carsem

AD7705BRUZ

PRODUCTION

AD7705BRUZ-REEL

PRODUCTION

AD7705BRUZ-REEL7

PRODUCTION

Aug 4, 2010

- 10_0117

arrow down

Halogen Free Material Change for SOIC_W Products at Carsem

AD7705BRZ

PRODUCTION

AD7705BRZ-REEL

PRODUCTION

AD7705BRZ-REEL7

PRODUCTION

Feb 8, 2010

- 04_0080

arrow down

Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

EVAL-AD7705

AD7705 Evaluation Kit

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EVAL-AD7705

AD7705 Evaluation Kit

Product Detail

The EVAL-AD7705EBZ is a fully featured evaluation Board for the AD7705. The evaluation board can be connected to a PC via the parallel port. Software is provided enabling the user to perform detailed analysis of the ADC's performance.
Tools & Simulations

Tools & Simulations 1

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