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Home > Products > Integrated Circuits (ICs) > Data Acquisition - Analog to Digital Converters (ADC) > AD7684BRMZ
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AD7684BRMZ

In Stock 8596 pcs Reference Price(In US Dollars)
1+
$461.8389
Manufacturer Part Number:
AD7684BRMZ
Manufacturer / Brand
Analog Devices Inc.
Part of Description:
IC ADC 16BIT SAR 8MSOP
Datasheets:
AD7684BRMZ.pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 8596 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number AD7684BRMZ
Manufacturer / Brand Analog Devices Inc.
Stock Quantity 8596 pcs Stock
Category Integrated Circuits (ICs) > Data Acquisition - Analog to Digital Converters (ADC)
Description IC ADC 16BIT SAR 8MSOP
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ AD7684BRMZ Datasheets AD7684BRMZ Details PDF
AD7684BRMZ Details PDF for FR.pdf
AD7684BRMZ Details PDF for KR.pdf
AD7684BRMZ Details PDF for IT.pdf
AD7684BRMZ Details PDF for ES.pdf
AD7684BRMZ Details PDF for DE.pdf
Voltage - Supply, Digital 2.7V ~ 5.5V
Voltage - Supply, Analog 2.7V ~ 5.5V
Supplier Device Package 8-MSOP
Series PulSAR®
Sampling Rate (Per Second) 100k
Reference Type External
Ratio - S/H:ADC 1:1
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Package Tube
Operating Temperature -40°C ~ 85°C
Number of Inputs 1
Number of Bits 16
Number of A/D Converters 1
Mounting Type Surface Mount
Input Type Differential
Features -
Data Interface SPI, DSP
Configuration S/H-ADC
Base Product Number AD7684
Architecture SAR

Packaging & ESD

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AD7684BRMZ Product Details:

The AD7684BRMZ is a high-performance, 16-bit analog-to-digital converter (ADC) from Analog Devices, Inc. (ADI). It is part of the PulSAR series and designed for a wide range of data acquisition applications.

The AD7684BRMZ features a single differential input and a successive approximation register (SAR) architecture, which allows for a sampling rate of up to 100 kSPS. The ADC operates on a single 2.7 V to 5.5 V power supply, making it suitable for both digital and analog circuitry. It also supports an external reference, providing flexibility for system design.

One of the key design challenges addressed by the AD7684BRMZ is the need for high-resolution, low-power data acquisition in compact electronic devices. The small 8-MSOP package, combined with its wide operating temperature range of -40°C to 85°C, makes it well-suited for integration into various product applications, such as industrial automation, medical equipment, and portable electronics.

The AD7684BRMZ offers several advantages, including its low power consumption, high accuracy, and excellent noise performance. The ADC's 16-bit resolution and differential input configuration ensure precise analog-to-digital conversion, essential for demanding data acquisition tasks.

The AD7684BRMZ is compatible with SPI and DSP data interfaces, allowing for seamless integration with a wide range of microcontrollers and digital signal processors. This versatility makes the ADC suitable for a variety of applications, including industrial process control, instrumentation, and consumer electronics.

Regarding equivalent models, Analog Devices offers several alternative 16-bit ADCs that may be considered, such as the AD7685, AD7686, and AD7687. These models offer similar features and performance, with variations in input channels, sampling rates, and package options, allowing designers to select the most appropriate solution for their specific application requirements.

AD7684BRMZ Key Technical Attributes

16 Bit Resolution

SAR Architecture

100k Sampling Rate (Per Second)

AD7684BRMZ Packing Size

8-MSOP Package

Tube Packaging

Encapsulation: MSOP8

Pin Configuration: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

AD7684BRMZ Application

Used in data acquisition systems requiring high precision analog to digital conversion

AD7684BRMZ Features

The AD7684BRMZ is a 16-bit Analog to Digital Converter that features a successive approximation register (SAR) architecture which ensures high accuracy and low power consumption. It is capable of up to 100,000 samples per second, providing efficient data acquisition in real-time applications. This ADC operates with a single power supply ranging from 2.7 V to 5.5 V and supports a differential input type which enhances noise immunity and increases precision. The digital interface is compatible with SPI and DSP protocols, making it highly versatile for integration into various microcontroller-based systems. The external reference type offers flexibility in setting up the desired voltage reference for different application needs.

AD7684BRMZ Quality and Safety Features

Moisture Sensitivity Level (MSL) 1 (Unlimited)

Lead-free / RoHS Compliant ensuring environmental safety and regulatory compliance

AD7684BRMZ Compatibility

Compatible with systems requiring SPI or DSP based data interfaces

Supports external reference voltage adjustments for varied use-cases

AD7684BRMZ Datasheet PDF

Access the most authoritative and detailed datasheet for AD7684BRMZ on our website. For comprehensive specifications, wiring guidelines, and application notes, download the datasheet now from the current page.

Quality Distributor

IC-Components is a premium distributor for Analog Devices, Inc. We provide not just parts but peace of mind with quality assurance and genuine products. For competitive pricing and excellent customer service, get a quote for AD7684BRMZ directly on our website today.

Frequently Asked Questions

What are the practical implications of the AD7684BRMZ's 2.7V to 5.5V analog and digital supply range for system designers?
The AD7684BRMZ's flexible 2.7V to 5.5V analog and digital supply range offers significant design advantages. It allows for direct interfacing with a wide variety of microcontrollers and signal conditioning circuits operating at different logic levels, simplifying the analog front-end design. This dual supply capability means the AD7684BRMZ can operate from common system rails, reducing the need for dedicated, tightly regulated voltage generators. However, designers must ensure their chosen supply voltages are stable and within the specified limits to maintain the AD7684BRMZ's specified performance across the full operating temperature range.
Can the AD7684BRMZ's SPI interface be directly driven by a 3.3V microcontroller without level shifting for a typical industrial sensor application?
Yes, the AD7684BRMZ's SPI interface is designed to be compatible with digital supply voltages from 2.7V to 5.5V. Therefore, if your microcontroller operates at a 3.3V digital supply, the SPI signals can typically be directly interfaced without level shifting, assuming the microcontroller's output voltage is within the AD7684BRMZ's input logic threshold specifications. This simplifies board layout and reduces component count in your system design.
When considering replacement of an older 12-bit ADC in a legacy system with the AD7684BRMZ, what are the key design considerations for the SPI bus timing and data conversion rate?
Migrating from an older 12-bit ADC to the AD7684BRMZ, a 16-bit SAR ADC, requires careful attention to SPI bus timing and data rate. While the AD7684BRMZ supports sampling up to 100kSPS, the SPI clock speed and data transfer duration for 16 bits will be longer than for a 12-bit device. Designers must verify that the microcontroller's SPI peripheral can support the required clock frequency and accommodate the additional data bits per conversion, ensuring the overall throughput meets system requirements. The AD7684BRMZ's data interface is SPI, so compatibility with the existing SPI protocol is expected, but clock speed and command structure for configuration might differ.
What are the potential failure modes or risks if the external reference voltage for the AD7684BRMZ drifts outside its specified tolerance during long-term industrial operation?
Drift in the external reference voltage for the AD7684BRMZ during long-term industrial operation can significantly impact accuracy. The AD7684BRMZ's conversion accuracy is directly proportional to the stability of its external reference. If the reference voltage drifts, the ADC will report incorrect analog input values, leading to measurement errors. This is particularly critical in applications requiring precise readings, such as process control or scientific instrumentation. It is imperative to use a stable, low-drift voltage reference that meets or exceeds the ADC's specifications and to consider temperature compensation if operating in a wide temperature range.
For an embedded system with limited processing power, how can the AD7684BRMZ's single input and SAR architecture simplify the analog front-end design and reduce the burden on the microcontroller?
The AD7684BRMZ, with its single input and Successive Approximation Register (SAR) architecture, simplifies embedded system design by minimizing the complexity of the analog front-end. Its integrated Sample-and-Hold (S/H) circuit means a separate S/H amplifier is not required, reducing component count and board space. The SAR architecture is inherently efficient for many applications requiring moderate sampling rates, and the direct SPI interface allows for straightforward data acquisition by the microcontroller without complex bus protocols. This reduces the processing load on the microcontroller, freeing up resources for other tasks.
In a battery-powered application where power is critical, how can designers optimize the AD7684BRMZ's power consumption while still achieving the maximum sampling rate?
To optimize power consumption in a battery-powered application using the AD7684BRMZ, designers should leverage its power-down modes when the ADC is not actively converting. The AD7684BRMZ's specifications detail power consumption at various operating conditions. When active, the power consumption is related to the sampling rate and supply voltage. For maximum sampling rate (100kSPS), power consumption will be at its peak. To conserve power, consider reducing the sampling rate if the application permits, or implement a duty cycle where the AD7684BRMZ is powered down between measurements. Careful selection of the analog and digital supply voltage (lower end of the 2.7V to 5.5V range generally consumes less power) also contributes to optimization.
What are the key considerations when replacing a Texas Instruments ADS8864 with the AD7684BRMZ in an existing design, focusing on potential electrical compatibility and performance differences?
When considering replacing a Texas Instruments ADS8864 with the ADI AD7684BRMZ, engineers should meticulously compare datasheets. While both are 16-bit SAR ADCs, critical differences may exist in their reference input requirements (e.g., impedance, bandwidth), SPI timing specifications (setup and hold times, clock polarity/phase), power consumption profiles, and absolute accuracy specifications (INL, DNL, offset, gain errors). The AD7684BRMZ uses an external reference, which offers flexibility but requires careful selection. The ADS8864 might have integrated reference buffering or different power supply requirements. Thoroughly review the SPI command structure and electrical characteristics to ensure seamless integration and that performance targets are met or exceeded by the AD7684BRMZ.
How does the AD7684BRMZ's 16-bit resolution and 100kSPS sampling rate position it against faster but lower-resolution ADCs for high-bandwidth analog signal acquisition?
The AD7684BRMZ's 16-bit resolution provides a significant advantage in applications requiring high dynamic range and the ability to resolve small signal variations. Its 100kSPS sampling rate is suitable for many medium-bandwidth signals. However, for very high-bandwidth applications where capturing transient events or signals with rapid changes is paramount, ADCs with much higher sampling rates (e.g., MSPS range) might be necessary, even if they offer lower resolution. The AD7684BRMZ is ideally suited for applications where precision is more critical than raw speed, such as accurate measurement of slowly varying physical quantities or processing signals with bandwidths up to approximately 50kHz (Nyquist).
What are the recommended best practices for layout and grounding when integrating the AD7684BRMZ into a noisy mixed-signal PCB environment to maintain its 16-bit accuracy?
To maintain the 16-bit accuracy of the AD7684BRMZ in a noisy mixed-signal PCB, robust layout and grounding practices are essential. A solid, unbroken ground plane is crucial for both analog and digital grounds, ideally with separate but connected analog and digital ground pours to minimize digital noise coupling into the sensitive analog circuitry. Decoupling capacitors should be placed as close as possible to the power supply pins (VDRIVE and VAVDD) of the AD7684BRMZ to filter out power supply noise. Analog signal traces should be kept short and isolated from digital signals, and the external reference voltage trace should be carefully routed to avoid picking up noise.
Under what operating conditions, particularly ambient temperature extremes, might the AD7684BRMZ's specified performance (e.g., INL, DNL) begin to degrade significantly, and how can this be mitigated?
The AD7684BRMZ is specified for operation from -40°C to 85°C. While it is designed to meet its performance specifications across this entire range, significant degradation of parameters like Integral Non-Linearity (INL) and Differential Non-Linearity (DNL) can occur at the extreme ends of this temperature range due to temperature coefficients inherent in semiconductor devices. Mitigation strategies include ensuring the external reference voltage also has a low temperature coefficient, implementing temperature compensation algorithms in firmware if the application demands very tight accuracy across the full range, or operating the AD7684BRMZ within a narrower, more stable temperature band if feasible. Understanding the specific temperature coefficients for INL and DNL from the datasheet is key.

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