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

Analog Devices Inc. AD4020BRMZ

Name: AD4020BRMZ
Brand: Analog Devices Inc.
SKU: AD4020BRMZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD4020BRMZ

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: AD4020BRMZ.pdf

Description:: IC ADC 20BIT SAR 10MSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AD4020BRMZ from Analog Devices is a 20-bit, 1.8 MSPS differential successive approximation register (SAR) analog-to-digital converter with Easy Drive architecture, ±3.1 ppm INL, 100.5 dB SNR at 1 kHz, and integrated input overvoltage clamp protection-designed for precision data acquisition in automated test equipment and medical instrumentation.

For engineers reviewing the AD4020BRMZ datasheet, AD4020BRMZ pinout, AD4020BRMZ application, or AD4020BRMZ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation value, and two confirmed alternative parts with documented functional and application-level distinctions.

Technical Context

The AD4020BRMZ employs a single-supply 1.8 V SAR architecture with external 2.4 V–5.1 V reference and supports three throughput modes (1.8/1/0.5 MSPS) via family variant selection-not user-configurable on-device. Its Easy Drive input stage reduces acquisition-phase current to ≤1 µA at 1.8 MSPS and extends acquisition time to ≥77% of cycle time, eliminating need for dedicated ADC drivers in high-Z mode.

It features SPI/QSPI/MICROWIRE/DSP-compatible serial interface with separate VIO (1.71 V–5.5 V), daisy-chain and CS-mode operation, status bit reporting, and input span compression enabling single-supply operation without negative rail-while preserving full 20-bit code range and guaranteeing no missing codes across −40°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	20-bit, guaranteed no missing codes-ensures monotonicity and full code coverage for metrology-grade measurements.
Throughput Rate	1.8 MSPS-enables accurate capture of signals up to 10 MHz bandwidth with <1 ns aperture jitter.
INL Error	±3.1 ppm max-translates to <±0.3 LSB error at full scale, critical for calibration-critical systems.
SNR	100.5 dB at fIN = 1 kHz, VREF = 5 V-supports >16.5 effective number of bits (ENOB) in narrowband applications.
Input Current (acq.)	≤1 µA at 1.8 MSPS in high-Z mode-reduces burden on preceding signal chain and enables direct connection to high-impedance sensors.
Oversampled DR	131 dB at OSR = 1024-allows noise shaping for ultra-low-noise DC or low-frequency measurements without external filtering.
Power (total)	15 mW at 1.8 MSPS, 2.7 mW VDD-only-enables high channel density in space-constrained, thermally sensitive systems.
Operating Temp	−40°C to +125°C-qualified for industrial and automotive under-hood data acquisition environments.

Pinout & Package

AD4020BRMZ is housed in a 10-lead MSOP package (3 mm × 4.90 mm) with exposed pad (not electrically required but recommended for thermal performance). Pinout matches AD4003/AD4007/AD4011 family for layout reuse.

Pin/Terminal	Circuit Role	Design Meaning
1 REF	Analog reference input	Accepts 2.4 V–5.1 V external reference; requires local 10 µF X7R decoupling to GND for stability and noise immunity.
2 VDD	Analog power supply	1.71 V–1.89 V single supply; bypass with 0.1 µF ceramic capacitor to GND to suppress switching noise.
3 IN+	Differential analog input (+)	Accepts true differential input up to ±VREF; common-mode range centered at VREF/2 ±125 mV.
4 IN−	Differential analog input (−)	Paired with IN+; internal clamp sinks up to 50 mA during overvoltage events to protect front-end circuitry.
5 GND	Power ground	Primary return path for VDD, REF, and analog inputs; must connect to low-impedance ground plane.
6 CNV	Convert control input	Edge-triggered start-of-conversion; selects interface mode (CS vs. daisy-chain) and enables SDO in CS mode when low.
7 SDO	Serial data output	20-bit twos-complement result synchronized to SCK; tri-states when CNV/SDI high in CS mode.
8 SCK	Serial clock input	Supports up to 100 MHz SCK in turbo mode; timing-critical for achieving 1.8 MSPS throughput.
9 SDI	Serial data input	Mode-select pin (high = CS mode, low = daisy-chain); also accepts 16-bit configuration words in CS mode.
10 VIO	Digital I/O supply	Independent 1.71 V–5.5 V logic supply-enables interoperability with 1.8 V, 3.3 V, or 5 V microcontrollers/FPGAs.

Key Features

Feature	Design Value
Easy Drive input architecture	Reduces input current to ≤1 µA at 1.8 MSPS and extends acquisition phase to 325 ns-eliminates need for external op-amp driver in most sensor interfaces.
Input overvoltage clamp	Sinks up to 50 mA per input while limiting REF disturbance-removes requirement for external Schottky diodes and simplifies robust front-end design.
Input span compression	Shifts input range to 0.1×VREF to 0.9×VREF-enables single-supply operation without negative rail while retaining full 20-bit dynamic range.
Turbo mode interface	Enables 1.8 MSPS throughput with 71 MHz minimum SCK-lowers digital I/O power vs. standard SPI and eases timing closure across isolation barriers.
High-Z acquisition mode	Reduces input current by >99% during sampling-preserves signal integrity when interfacing with high-output-impedance sources like piezoelectric sensors.
Status bit reporting	Provides real-time busy, overrange, and CRC status via configurable bits-enables deterministic host firmware response without polling overhead.

Applications

Automated Test Equipment (ATE)	Medical Imaging Signal Chain
Use Scenario: High-speed digitization of calibrated stimulus-response waveforms in semiconductor parametric testers. IC Role / Device Role / Timing Role: Primary 20-bit acquisition node capturing multi-MHz transients with sub-ns timing fidelity and minimal latency. Use Value: 100.5 dB SNR and ±3.1 ppm INL ensure traceable measurement accuracy; 1.8 MSPS throughput captures full Nyquist bandwidth without interpolation artifacts.	Use Scenario: Digitizing low-noise, low-slew-rate analog outputs from ultrasound beamformer channels. IC Role / Device Role / Timing Role: Precision front-end ADC in multi-channel receive path, operating at 500 kSPS–1 MSPS with oversampling support. Use Value: 131 dB oversampled dynamic range at OSR = 1024 enables >100 dB effective resolution for Doppler signal extraction without analog filtering.
Battery-Powered Portable Diagnostics	Precision Industrial Sensor Hub
Use Scenario: Low-power, high-accuracy acquisition in handheld ECG or impedance spectroscopy devices. IC Role / Device Role / Timing Role: Core ADC in energy-constrained system requiring <2.7 mW VDD-only operation and wide temperature range support. Use Value: 2.7 mW VDD-only power at 500 kSPS and −40°C to +125°C rating enable reliable field deployment without active cooling or voltage translation.	Use Scenario: Multi-sensor aggregation node collecting strain gauge, RTD, and thermocouple signals in factory automation PLCs. IC Role / Device Role / Timing Role: Shared high-precision ADC resource serving multiple isolated analog inputs via multiplexer and programmable gain amplifier. Use Value: Input clamp protection and ±VREF differential range simplify anti-aliasing filter design; pin compatibility with AD4003/AD4011 allows scalable BOM reuse.

Automated Test Equipment (ATE)

Medical Imaging Signal Chain

Use Scenario: High-speed digitization of calibrated stimulus-response waveforms in semiconductor parametric testers.

IC Role / Device Role / Timing Role: Primary 20-bit acquisition node capturing multi-MHz transients with sub-ns timing fidelity and minimal latency.

Use Value: 100.5 dB SNR and ±3.1 ppm INL ensure traceable measurement accuracy; 1.8 MSPS throughput captures full Nyquist bandwidth without interpolation artifacts.

Use Scenario: Digitizing low-noise, low-slew-rate analog outputs from ultrasound beamformer channels.

IC Role / Device Role / Timing Role: Precision front-end ADC in multi-channel receive path, operating at 500 kSPS–1 MSPS with oversampling support.

Use Value: 131 dB oversampled dynamic range at OSR = 1024 enables >100 dB effective resolution for Doppler signal extraction without analog filtering.

Battery-Powered Portable Diagnostics

Precision Industrial Sensor Hub

Use Scenario: Low-power, high-accuracy acquisition in handheld ECG or impedance spectroscopy devices.

IC Role / Device Role / Timing Role: Core ADC in energy-constrained system requiring <2.7 mW VDD-only operation and wide temperature range support.

Use Value: 2.7 mW VDD-only power at 500 kSPS and −40°C to +125°C rating enable reliable field deployment without active cooling or voltage translation.

Use Scenario: Multi-sensor aggregation node collecting strain gauge, RTD, and thermocouple signals in factory automation PLCs.

IC Role / Device Role / Timing Role: Shared high-precision ADC resource serving multiple isolated analog inputs via multiplexer and programmable gain amplifier.

Use Value: Input clamp protection and ±VREF differential range simplify anti-aliasing filter design; pin compatibility with AD4003/AD4011 allows scalable BOM reuse.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision SAR ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD4021BRMZ	1 MSPS maximum throughput, lower power (10 mW at 1 MSPS), identical pinout and feature set.	Targeted at cost-optimized or lower-bandwidth systems where 1.8 MSPS is unnecessary.	Select AD4021BRMZ when system sampling rate ≤1 MSPS and power budget is tighter than 15 mW.
AD4003BRMZ	18-bit resolution, 2 MSPS, same 10-lead MSOP package and Easy Drive architecture-but no oversampling support or status bits.	Suitable for high-speed, moderate-accuracy applications like motor control feedback where 20-bit resolution is not required.	Choose AD4003BRMZ only if 18-bit ENOB suffices and oversampling or diagnostic status reporting is not needed.

Compared with AD4020BRMZ, AD4021BRMZ trades peak speed for lower power and identical functionality, while AD4003BRMZ sacrifices 2 bits of resolution and advanced diagnostics to achieve higher raw throughput-making AD4020BRMZ the sole option for applications demanding simultaneous 20-bit accuracy, 1.8 MSPS, and robust diagnostics at industrial temperature range.

Availability

AD4020BRMZ is available at Aetrix Electronics and suitable for automated test equipment, medical imaging subsystems, and battery-powered portable diagnostics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD4020BRMZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.

The AD4020BRMZ belongs to the AD40xx Easy Drive precision SAR ADC product line, engineered specifically for high-channel-density, low-power, high-accuracy data acquisition systems where driver complexity, power, and board space must be minimized without sacrificing metrology-grade performance.

FAQ

What is the maximum achievable throughput for AD4020BRMZ, and what conditions are required?

The AD4020BRMZ achieves its rated 1.8 MSPS throughput only when turbo mode is enabled and the serial clock (SCK) operates at ≥71 MHz with VIO ≥ 2.7 V. Under these conditions, conversion time is 320 ns and acquisition phase is 325 ns. At lower SCK frequencies or with VIO < 2.7 V, throughput drops to 1.67 MSPS or less, as specified in Table 4 of the AD4020/AD4021/AD4022 datasheet Rev. C.

Does AD4020BRMZ require an external driver amplifier for sensor interfacing?

No-AD4020BRMZ does not require an external driver amplifier in most cases due to its Easy Drive architecture, which reduces input current to ≤1 µA at 1.8 MSPS and extends acquisition time to 325 ns. This enables direct connection to high-output-impedance sources such as RTDs, thermistors, and piezoelectric sensors when high-Z mode is enabled, as confirmed in the General Description and Figure 2 of the datasheet.

What is the purpose of the input span compression feature in AD4020BRMZ?

Input span compression in AD4020BRMZ shifts the usable analog input range from ±VREF to 0.1×VREF to 0.9×VREF, allowing single-supply operation without a negative rail while preserving full 20-bit code utilization. This eliminates the need for dual-supply op-amps in the signal chain and is especially valuable in battery-powered or isolated systems where generating a negative voltage is impractical or inefficient.

Can AD4020BRMZ operate with a 2.5 V reference voltage, and how does that affect performance?

Yes, AD4020BRMZ supports VREF from 2.4 V to 5.1 V. At VREF = 2.5 V, SNR degrades to 94.7 dB (vs. 100.5 dB at 5 V), THD is −119 dB, and SINAD is 94.5 dB at 1 kHz-still sufficient for 18.5+ ENOB. The device maintains full 20-bit no-missing-codes operation and all timing specifications remain valid, making it viable for low-voltage, low-power designs where dynamic range trade-offs are acceptable.

Is AD4020BRMZ pin-compatible with other members of the AD40xx family?

Yes, AD4020BRMZ is pin-compatible with AD4003/AD4007/AD4011 family members in the 10-lead MSOP (RM-10) and LFCSP (CP-10-9) packages. This allows direct PCB footprint reuse across resolution (18-bit vs. 20-bit), speed (0.5–2 MSPS), and feature variants-enabling scalable BOM strategies and simplified design migration, as explicitly stated in the Features section of the datasheet.

AD4020BRMZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging:: Tube

Product Status:: Active

Number of Bits:: 20

Sampling Rate (Per Second):: 1.8M

Number of Inputs:: 1

Input Type:: Differential

Data Interface:: DSP, MICROWIRE™, QSPI™, and SPI™

Configuration:: -

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External

Voltage - Supply, Analog:: 1.71V ~ 1.89V

Voltage - Supply, Digital:: 1.71V ~ 5.5V

Features:: -

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 10-MSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD4020BRMZ FAQ

1.How can I place an order for AD4020BRMZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD4020BRMZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD4020BRMZ reliable?

The price and inventory of AD4020BRMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4020BRMZ is usually 5 days.

3.What payment methods are accepted for AD4020BRMZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4020BRMZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD4020BRMZ?

AD4020BRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD4020BRMZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD4020BRMZ?

For technical support, including AD4020BRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4020BRMZ requirements.

6.How does Aetrix verify that AD4020BRMZ is sourced from the original manufacturer or authorized distributors?

All AD4020BRMZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD4020BRMZ meets industry standards.

7.What is the process for return or replacement of AD4020BRMZ?

All AD4020BRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD4020BRMZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD4020BRMZ part is unused and in its original packaging.

Return procedure for AD4020BRMZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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