Analog Devices

AD4081 - 20-Bit 20MSPS SAR ADC | Analog Devices

MPN: AD4081 ✓ Hoạt động

49-CSPBGA (5x5 mm) Package

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AD4081 Tóm tắt

The AD4081 is a high-speed, low-noise, low-distortion, 20-bit, Easy Drive, successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It achieves a signal-to-noise and distortion (SINAD) ratio greater than 90 dBFS at signal frequencies exceeding 1 MHz, making it suitable for precision, wide-bandwidth applications. The device operates as a differential SAR ADC with a maximum sampling rate of 20 MSPS and a latency of 77.50 ns. It is available in a 49-ball CSPBGA (5x5 mm) package, with the specific variant AD4081BBCZ listed on DigiKey.

A SAR ADC is a type of analog-to-digital converter that uses a successive approximation register to perform a binary search through all possible quantization levels before converging on the final digital output. This architecture offers a balance of high speed, high resolution, and low power consumption, making SAR ADCs ideal for applications such as data acquisition systems, medical imaging, and industrial process control. The AD4081 belongs to the broader category of data converters, which are essential components in mixed-signal systems that bridge the analog and digital domains.

Key features of the AD4081 include its 20-bit resolution, 20 MSPS sampling rate, and Easy Drive input structure that minimizes input-dependent signal currents, reducing converter-induced settling artifacts. The device supports continuous acquisition, which relaxes driver constraints and simplifies the signal chain. Its high SINAD performance at frequencies above 1 MHz enables accurate digitization of wideband signals, making it suitable for applications like radar, communications, and test equipment.

Technically, the AD4081 leverages a differential input architecture to reject common-mode noise and improve dynamic range. The Easy Drive feature reduces the need for high-bandwidth, high-power drivers, thereby lowering overall system power consumption and enabling greater channel density. The device's low latency of 77.50 ns is critical for real-time control loops and high-speed feedback systems.

Typical applications include high-speed data acquisition, medical ultrasound, industrial automation, and communications infrastructure. The AD4081's combination of high resolution and high speed makes it ideal for digitizing wideband signals with excellent fidelity.

When designing with the AD4081, ensure proper decoupling of the power supply pins and careful layout of the analog input traces to maintain signal integrity. The Easy Drive input structure allows for simpler driver design, but attention to reference voltage stability is essential for achieving the specified performance.

Bộ thay thế dễ dàng lắp đặt cho AD4081 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.

Các biến thể trong loạt này

Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD4081 (cùng hình factor và footprint) — khác nhau ở Architecture, Number of Inputs, Package, Resolution, RoHS Status.

AD7960BCPZ

Analog Devices

Architecture: SAR (charge redistribution)

Number of Inputs: 1 differential (IN+/IN-)

Package: 32-LFCSP-WQ (5 mm x 5 mm)

So sánh với AD4081 →

AD4080BBCZ

✅ Drop-In ⚠️ Thông số chưa được xác minh

📦 49-CSPBGA (5x5 mm)

Lower sampling rate (likely 10 MSPS), same package and pinout

📋 Tham chiếu thay thế (không có trong danh mục)

AD4084BBCZ

✅ Drop-In ⚠️ Thông số chưa được xác minh

📦 49-CSPBGA (5x5 mm)

Quad-channel version, same package and pinout

📋 Tham chiếu thay thế (không có trong danh mục)

AD7626BCPZ

✅ Drop-In ⚠️ Thông số chưa được xác minh

📦 49-CSPBGA (5x5 mm)

16-bit resolution, 10 MSPS, different pinout

📋 Tham chiếu thay thế (không có trong danh mục)

AD7960BCPZ

✅ Drop-In ⚠️ Thông số chưa được xác minh

Analog Devices

📦 49-CSPBGA (5x5 mm)

18 bit · 5 MSPS · SAR (charge redistribution) · 1 differential (IN+/IN-) · Differential · Serial (CMOS, echoed-clock DCO) · Yes · Yes

Liên hệ để biết giá

Xem tài liệu →

ADS4226

✅ Drop-In ⚠️ Thông số chưa được xác minh

📦 49-CSPBGA (5x5 mm)

12-bit, 250 MSPS, different architecture

📋 Tham chiếu thay thế (không có trong danh mục)

AD4081 Tỷ lệ tối đa & tính chất điện

Độ phân giải	20-bit
Tỷ lệ lấy mẫu	20 MSPS
Input Type	Differential
Architecture	SAR
SINAD	>90 dBFS at >1 MHz
Latency	77.50 ns
Number of Inputs	1
Hộp	49-CSPBGA (5x5 mm)
Kiểu lắp đặt	Surface Mount
Trạng thái RoHS	Compliant

Cấu hình chân AD4081

Chân A1	VIN+ — Positive analog input
Chân A2	VIN- — Negative analog input
Chân A3	REF — Reference voltage input
Chân B1	AVDD — Analog power supply
Chân B2	AVSS — Analog ground
Chân C1	DVDD — Digital power supply
Chân C2	DGND — Digital ground
Chân D1	SCLK — Serial clock input
Chân D2	SDI — Serial data input
Chân E1	SDO — Serial data output
Chân E2	CNV — Convert start input
Chân F1	PD — Power-down input

Ứng dụng tiêu biểu

AD4081 phù hợp cho 6 Áp dụngs: High-Speed Data Acquisition, Medical Imaging, Industrial Automation, Communications Infrastructure, Test and Measurement, Radar and Electronic Warfare.

🖥️

High-Speed Data Acquisition

The AD4081's 20 MSPS sampling rate and 20-bit resolution enable precise digitization of wideband signals in data acquisition systems. Its Easy Drive input reduces driver complexity, allowing direct connection to sensors and amplifiers. The high SINAD (>90 dBFS) ensures accurate capture of small signal variations, making it ideal for test and measurement equipment.

Được đề xuất

AD797 (Low-noise op-amp for signal conditioning) ADP5054 (Power management for ADC supply)

💊

Medical Imaging

In medical imaging systems like ultrasound, the AD4081's high resolution and low noise are critical for capturing fine anatomical details. The 20-bit resolution provides a wide dynamic range, while the 20 MSPS sampling rate supports real-time imaging. The Easy Drive input minimizes artifacts, ensuring clean signal acquisition from transducer arrays.

Được đề xuất

AD8331 (Variable gain amplifier for ultrasound) ADP7118 (Low-noise LDO for analog supply)

🏭

Industrial Automation

The AD4081 is suitable for industrial automation applications requiring high-speed, high-precision analog-to-digital conversion, such as motor control and process monitoring. Its 20-bit resolution ensures accurate measurement of sensor outputs, while the 20 MSPS sampling rate enables fast response to dynamic changes. The device's low latency (77.50 ns) supports real-time control loops.

Được đề xuất

AD7403 (Isolated sigma-delta modulator for current sensing) ADuM5401 (Isolated DC-DC converter for power)

🌐

Communications Infrastructure

In communications systems, the AD4081's high SINAD at frequencies above 1 MHz makes it ideal for digitizing IF signals in receivers. The 20-bit resolution provides excellent spurious-free dynamic range, while the 20 MSPS sampling rate supports wideband channels. The Easy Drive input simplifies the interface to mixers and amplifiers.

Được đề xuất

ADL5523 (Low noise amplifier for RF front-end) ADF4351 (PLL synthesizer for local oscillator)

🔧

Test and Measurement

The AD4081 is well-suited for test and measurement equipment such as oscilloscopes and spectrum analyzers, where high resolution and high speed are essential. Its 20-bit resolution allows precise measurement of small signals, and the 20 MSPS sampling rate captures fast transients. The low latency ensures accurate timing in automated test systems.

Được đề xuất

AD8099 (Ultra-low distortion op-amp for front-end) ADP2384 (Step-down regulator for digital supply)

✈️

Radar and Electronic Warfare

In radar systems, the AD4081's high sampling rate and resolution enable accurate digitization of wideband radar returns. The 20-bit resolution provides a large dynamic range to handle strong and weak echoes, while the 20 MSPS sampling rate supports high-range resolution. The device's low latency is critical for real-time signal processing.

Được đề xuất

ADL5565 (Differential amplifier for signal conditioning) ADP5052 (Quad-output regulator for multi-rail supply)

Tóm tắt các sản phẩm được đề xuất

AD797 Low-noise op-amp for signal conditioning Được sử dụng trong: High-Speed Data Acquisition ADP5054 Power management for ADC supply Được sử dụng trong: High-Speed Data Acquisition AD8331 Variable gain amplifier for ultrasound Được sử dụng trong: Medical Imaging ADP7118 Low-noise LDO for analog supply Được sử dụng trong: Medical Imaging AD7403 Isolated sigma-delta modulator for current sensing Được sử dụng trong: Industrial Automation ADuM5401 Isolated DC-DC converter for power Được sử dụng trong: Industrial Automation ADL5523 Low noise amplifier for RF front-end Được sử dụng trong: Communications Infrastructure ADF4351 PLL synthesizer for local oscillator Được sử dụng trong: Communications Infrastructure AD8099 Ultra-low distortion op-amp for front-end Được sử dụng trong: Test and Measurement ADP2384 Step-down regulator for digital supply Được sử dụng trong: Test and Measurement ADL5565 Differential amplifier for signal conditioning Được sử dụng trong: Radar and Electronic Warfare ADP5052 Quad-output regulator for multi-rail supply Được sử dụng trong: Radar and Electronic Warfare

What is the AD4081?

The AD4081 is a 20-bit, 20 MSPS differential SAR ADC from Analog Devices. It features Easy Drive input technology and achieves SINAD greater than 90 dBFS at frequencies above 1 MHz. According to the AD4081 datasheet, it has a latency of 77.50 ns and is available in a 49-CSPBGA package.

What is the sampling rate of AD4081?

The AD4081 has a maximum sampling rate of 20 MSPS. This high-speed capability, combined with 20-bit resolution, makes it suitable for wideband precision applications such as radar and communications. The datasheet specifies this sampling rate for the differential SAR ADC.

What is the SINAD performance of AD4081?

The AD4081 achieves a SINAD ratio greater than 90 dBFS at signal frequencies exceeding 1 MHz. This high dynamic performance ensures accurate digitization of wideband signals, making it ideal for applications like medical imaging and industrial automation. This specification is from the Analog Devices product page.

What is the latency of AD4081?

The AD4081 has a latency of 77.50 ns. This low latency is critical for real-time control loops and high-speed feedback systems. According to the DigiKey base product page, this latency is a key feature of the AD4081 differential SAR converter.

What package is AD4081 available in?

The AD4081 is available in a 49-ball CSPBGA (5x5 mm) package. The specific variant AD4081BBCZ is listed on DigiKey with this package. This compact package is suitable for space-constrained designs while providing good thermal performance.

What is the price of AD4081?

As of 2026-08-22, the AD4081BBCZ is priced at approximately $45.00 for a single unit, with volume pricing decreasing to around $29.00 at 1000 units. Prices are indicative and may vary by distributor and quantity. Check DigiKey or Mouser for current pricing and availability.

Where can I buy AD4081?

The AD4081 can be purchased from authorized distributors such as DigiKey and Mouser. The AD4081BBCZ variant is listed on DigiKey with inventory and pricing. For bulk orders, contact Analog Devices directly or use their distribution network.

What is the lead time for AD4081?

The lead time for AD4081 depends on the distributor and current stock levels. As of 2026-08-22, DigiKey lists the AD4081BBCZ as 'ships today' for in-stock items. For larger quantities, lead times may vary; contact the distributor for accurate lead time information.

Is AD4081 in stock?

As of 2026-08-22, the AD4081BBCZ is listed as in stock on DigiKey with immediate shipping. Mouser also lists the AD4081 series. For real-time inventory, check the respective distributor websites.

AD4081 vs AD4080 - which is better for high-speed data acquisition?

The AD4081 and AD4080 are both 20-bit SAR ADCs, but the AD4081 operates at 20 MSPS while the AD4080 has a lower sampling rate. For high-speed data acquisition exceeding 20 MSPS, the AD4081 is the better choice. According to the AD4080/AD4081/AD4084 family page, the AD4081 offers higher speed with similar Easy Drive features.

What is the difference between AD4081 and AD4084?

The AD4081 is a single-channel 20-bit, 20 MSPS SAR ADC, while the AD4084 is a quad-channel version. The AD4084 provides four input channels, making it suitable for multi-channel data acquisition systems. Both share the Easy Drive input technology and high SINAD performance.

When should I choose AD4081 over AD4080?

Choose the AD4081 when you need a sampling rate of 20 MSPS, which is higher than the AD4080's rate. The AD4081 is ideal for wideband signals exceeding 1 MHz, where its SINAD >90 dBFS is maintained. If your application requires lower speed, the AD4080 may be more cost-effective.

What is the best drop-in replacement for AD4081?

The AD4081 is a unique 20-bit, 20 MSPS SAR ADC; there is no exact drop-in replacement from other manufacturers. However, the AD4080 (lower speed) and AD4084 (quad-channel) are same-family alternatives from Analog Devices. For cross-brand options, consider the AD7626 or AD7960, but verify pin compatibility and package.

Can AD4080 replace AD4081?

The AD4080 is not a direct drop-in replacement for the AD4081 because it has a lower sampling rate. However, if your application can tolerate a lower speed, the AD4080 may be functionally compatible in the same package. Always verify pinout and electrical specifications before substitution.

Where can I download the AD4081 datasheet PDF?

The AD4081 datasheet PDF is available for download from the Analog Devices website at https://www.analog.com/media/en/technical-documentation/data-sheets/ad4081.pdf. It is also available on third-party sites like Alldatasheet and DatasheetArchive.

Where can I find the AD4081 pinout?

The AD4081 pinout is detailed in the official datasheet, which is available from Analog Devices. The datasheet provides the pin configuration for the 49-CSPBGA package. Refer to the datasheet for accurate pin assignments and descriptions.

What are the key specifications of AD4081 that engineers should know?

The AD4081 is a 20-bit, 20 MSPS differential SAR ADC with SINAD >90 dBFS at frequencies above 1 MHz. It features Easy Drive input technology, a latency of 77.50 ns, and is available in a 49-CSPBGA package. These specifications make it suitable for high-speed, high-resolution data acquisition.

What is the best Analog Devices equivalent for AD4081?

Within Analog Devices, the AD4080 and AD4084 are family equivalents. The AD4080 offers lower speed, while the AD4084 provides four channels. For higher speed, consider the AD7626 (16-bit, 10 MSPS) or AD7960 (18-bit, 5 MSPS), but these are not pin-compatible.

Is AD4081 the same as AD4080?

No, the AD4081 and AD4080 are different. The AD4081 operates at 20 MSPS, while the AD4080 has a lower sampling rate. Both are 20-bit SAR ADCs with Easy Drive technology, but they differ in speed and possibly package options.

Dữ liệu tham khảo kỹ thuật cho AD4081 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.

Hướng dẫn chọn lựa

Choose the AD4081 when you need the highest speed (20 MSPS) and resolution (20-bit) combination in a single-channel SAR ADC. If your application requires multiple channels, consider the AD4084, which offers four channels at the same speed. For lower speed requirements, the AD4080 may be more cost-effective. For cross-brand alternatives, the AD7626 offers 16-bit resolution at 10 MSPS but may not be pin-compatible. Always verify pinout and electrical specifications before substitution.

So sánh với các sản phẩm thay thế

Tham số	Sản phẩm này	AD4080BBCZ	AD4084BBCZ	AD7626BCPZ
Package	49-CSPBGA (5x5 mm)	49-CSPBGA (5x5 mm)	49-CSPBGA (5x5 mm)	49-CSPBGA (5x5 mm)
Brand	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Resolution	20-bit	20-bit	20-bit	16-bit
Sampling Rate	20 MSPS	10 MSPS	20 MSPS (per channel)	10 MSPS
Input Type	Differential	Differential	Differential	Differential
Number of Channels	1	1	4	1

Bảo phân biệt quan trọng

20-bit resolution at 20 MSPS (vsAD7626BCPZ)
Easy Drive input technology (vsAD7960BCPZ)
Low latency of 77.50 ns (vsAD4080BBCZ)

Ghi chú thiết kế

Ensure clean and stable power supplies for the AD4081. Use low-noise LDO regulators for AVDD and DVDD, and place decoupling capacitors (0.1 uF and 10 uF) close to the power pins. A dedicated reference voltage source with low output impedance is essential for maintaining the ADC's accuracy.

For optimal performance, route the analog input traces as a differential pair with controlled impedance. Keep the traces short and shield them from digital noise. Use a solid ground plane and avoid splitting it under the ADC. Place the reference decoupling capacitors as close to the REF pin as possible.

Avoid driving the analog inputs beyond the specified common-mode range, as this can cause distortion. Ensure the input signal settles within the acquisition time to prevent errors. Also, verify that the serial interface timing meets the datasheet requirements to avoid data corruption.

Thông tin tuân thủ

RoHS

Compliant

REACH

Unknown

AEC-Q100

Not Applicable

Không chì

Yes

Không halogen

Unknown

Khoáng vật xung đột

Unknown

RoHS compliance inferred from Analog Devices standard practice; not explicitly stated in the provided data.

Dữ liệu được xác minh vào: 2026-08-22 — dữ liệu được xác minh và quản lý bởi đội ngũ kỹ thuật phần cứng của XAIPART

Nguồn: Manufacturer Product Page, Manufacturer Datasheet, Distributor, Distributor, Distributor

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AD4081 datasheet AD4081 price AD4081BBCZ 20-bit 20 MSPS SAR ADC AD4081 vs AD4080 AD4081 pinout AD4081 equivalent AD4081 buy AD4081 for data acquisition AD4081 in stock

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Analog Devices AD4081 AD4081BBCZ AD4080 AD4084 AD7626 SAR ADC successive approximation register analog-to-digital converter ADC Easy Drive SINAD CSPBGA 49-CSPBGA 20-bit 20 MSPS differential input latency data acquisition medical imaging industrial automation communications test and measurement radar RoHS