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Analog Devices Inc. AD8021ARMZ-REEL7
- Part No.:
- AD8021ARMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8021ARMZ-REEL7.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,389
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Product details
Overview
AD8021ARMZ-REEL7 from Analog Devices is a high-speed, low-noise voltage feedback operational amplifier optimized for 16-bit precision signal chains. It delivers 2.1 nV/√Hz input voltage noise, 205 MHz small-signal bandwidth at G = +2 (±5 V), and 0.01% settling in 23 ns - enabling high-fidelity ADC preamplification and ultrasound signal conditioning in portable instrumentation.
For engineers reviewing the AD8021ARMZ-REEL7 datasheet, AD8021ARMZ-REEL7 pinout, AD8021ARMZ-REEL7 application, or AD8021ARMZ-REEL7 equivalent, key selection criteria include its output disable feature (1.3 mA quiescent current), ±2.25 V to ±12 V supply flexibility, and MSOP-8 package suitability for space-constrained analog front-ends requiring low distortion and wide common-mode range.
Technical Context
The AD8021ARMZ-REEL7 employs a voltage-feedback architecture with user-configurable compensation via external capacitor (CCOMP pin), enabling stable operation across gains of +1 to +10 without bandwidth sacrifice. Its dual-supply design supports ±2.25 V to ±12 V operation, and the integrated disable function reduces supply current to 1.3 mA while maintaining >40 dB off-isolation at 10 MHz.
It achieves 2.1 pA/√Hz input current noise and 0.5 μV/°C offset drift over −40°C to +85°C, making it suitable for DC-coupled, high-gain circuits where thermal stability and low-frequency precision are critical - such as active filters and precision instrumentation preamps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 205 MHz at G = +2, ±5 V - enables high-resolution sampling of fast transients in 16-bit ADC interfaces. |
| Input Voltage Noise | 2.1 nV/√Hz at 50 kHz - preserves SNR in low-level sensor and medical signal amplification. |
| Settling Time | 23 ns to 0.01% for 1 V step - ensures accurate multi-sample acquisition in high-speed data converters. |
| Quiescent Current | 7.7 mA enabled / 1.3 mA disabled (±5 V) - supports power-gated analog stages in battery-powered instruments. |
| Output Disable Turn-On/Off Time | 45 ns / 50 ns - allows rapid channel switching in multiplexed signal paths without timing penalty. |
| Input Offset Voltage Drift | 0.5 μV/°C (−40°C to +85°C) - maintains calibration integrity across industrial temperature ranges. |
| Capacitive Load Drive | 120 pF (30% overshoot, 1 V p-p) - simplifies layout by directly driving ADC input capacitance without isolation resistors. |
Pinout & Package
AD8021ARMZ-REEL7 is housed in an 8-lead MSOP (RM-8) package, thermally enhanced for high-speed analog performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LOGIC REFERENCE | Disable logic reference | Serves as ground reference for DISABLE pin threshold; must be tied to logic low when using disable function. |
| 2 −IN | Inverting input | High-impedance node for feedback networks; supports precision inverting gain configurations up to G = −10. |
| 3 +IN | Noninverting input | 10 MΩ input resistance, 1 pF common-mode capacitance - minimizes loading on high-Z sensors and filters. |
| 4 −VS | Negative supply rail | Accepts −2.25 V to −12 V; supplies internal bias circuitry and output stage negative swing capability. |
| 5 CCOMP | Compensation capacitor terminal | External capacitor sets dominant pole; enables stable operation across gain settings without sacrificing bandwidth. |
| 6 VOUT | Amplifier output | Drives 75 Ω video lines or 1 kΩ loads with ±3.2 V swing (±5 V supply); linear output current = 60 mA. |
| 7 +VS | Positive supply rail | Accepts +2.25 V to +12 V; determines output voltage headroom and slew rate performance. |
| 8 DISABLE | Active-low enable control | Asserting low (≤1.7 V below LOGIC REFERENCE) disables output and reduces IQ to 1.3 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Custom compensation | Single external capacitor (CCOMP) adjusts gain-bandwidth trade-off across G = +1 to +10 without instability. |
| Output disable | Reduces quiescent current from 7.7 mA to 1.3 mA while maintaining >40 dB input-to-output isolation at 10 MHz. |
| Low distortion | −93 dBc HD2 / −108 dBc HD3 at 1 MHz (2 V p-p) - preserves spectral purity in ultrasound and instrumentation signal paths. |
| Wide supply range | Operates from ±2.25 V to ±12 V or single 5 V - supports mixed-voltage systems and legacy ±5 V designs. |
| Fast overload recovery | 50 ns recovery from ±2.5 V overdrive (G = +2) - prevents data corruption during transient events in ADC drivers. |
Applications
| ADC Preamp & Driver | Ultrasound Signal Processing |
|---|---|
|
Use Scenario: Driving the input of 16-bit SAR or pipeline ADCs in portable test equipment. IC Role / Device Role / Timing Role: Low-noise, fast-settling buffer that conditions sensor signals prior to digitization. Use Value: 23 ns 0.01% settling and 2.1 nV/√Hz noise ensure full 16-bit ENOB is preserved across full-scale input steps. |
Use Scenario: Amplifying echo return signals in handheld ultrasound transceivers. IC Role / Device Role / Timing Role: High-bandwidth, low-distortion gain stage in analog beamforming paths. Use Value: −108 dBc third-harmonic distortion at 1 MHz and 205 MHz bandwidth support clean RF envelope detection. |
| Active Filter Stage | Portable Instrumentation Front-End |
|
Use Scenario: Implementing 4th-order low-pass or band-pass filters in battery-powered analyzers. IC Role / Device Role / Timing Role: Precision op-amp core in Sallen-Key or multiple-feedback topologies. Use Value: 0.5 μV/°C offset drift and 2.1 pA/√Hz current noise maintain filter accuracy over temperature and time. |
Use Scenario: Signal conditioning in handheld multimeters, oscilloscope probes, and portable DMMs. IC Role / Device Role / Timing Role: General-purpose high-speed amplifier for gain, level-shifting, and buffering. Use Value: MSOP-8 footprint and 5 V single-supply operation reduce board area and simplify power design in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4898-1ARZ | Lower input voltage noise (1.0 nV/√Hz), higher quiescent current (18 mA), no disable pin. | Better for ultra-low-noise DC-coupled preamps; unsuitable where power gating or space constraints apply. | Choose ADA4898-1ARZ only if noise dominates over power and disable functionality is unnecessary. |
| LMH6629MA/NOPB | Higher bandwidth (1.5 GHz), higher distortion (−72 dBc HD3 @ 1 MHz), no disable, SOIC-8 only. | Preferred for RF IF amplification above 100 MHz; less suitable for precision 16-bit ADC driver use cases. | Choose LMH6629MA/NOPB only for wideband AC-coupled gain stages where DC precision is secondary. |
Compared with ADA4898-1ARZ and LMH6629MA/NOPB, AD8021ARMZ-REEL7 uniquely balances sub-2.2 nV/√Hz noise, 205 MHz bandwidth, output disable, and MSOP-8 packaging - making it optimal for portable, battery-sensitive, 16-bit precision systems requiring both speed and efficiency.
Availability
AD8021ARMZ-REEL7 is available at Aetrix Electronics and suitable for portable instrumentation, ultrasound imaging front-ends, and 16-bit ADC driver applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD8021ARMZ-REEL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The AD8021ARMZ-REEL7 belongs to Analog Devices' precision high-speed op amp product line, engineered specifically for 16-bit resolution signal chains where low noise, fast settling, and power efficiency are co-optimized.
FAQ
What is the maximum supply voltage for AD8021ARMZ-REEL7?
The AD8021ARMZ-REEL7 supports a total supply voltage of up to 26.4 V, with individual rails ranging from ±2.25 V to ±12.0 V. Absolute maximum ratings specify ±12 V per rail; exceeding this may cause permanent damage. Operation at ±12 V yields 220 MHz bandwidth at G = +2 and 170 MHz at G = +5, as verified in Table 2 of the Rev. F datasheet.
Does AD8021ARMZ-REEL7 support single-supply operation?
Yes, AD8021ARMZ-REEL7 operates from a single 5 V supply, with input common-mode range from 0.9 V to 4.6 V and output swing from 1.10 V to 3.60 V. At 5 V, it delivers 190 MHz bandwidth at G = +2 and 130 MHz at G = +10 (Table 3), making it suitable for modern low-voltage portable instrumentation.
How does the CCOMP pin function in AD8021ARMZ-REEL7?
The CCOMP pin (Pin 5) connects to an external compensation capacitor that sets the dominant pole for stable closed-loop operation across gains from +1 to +10. For example, 7 pF yields 205 MHz bandwidth at G = +2 (±5 V). The capacitor ties directly to −VS and enables bandwidth customization without changing resistor values or risking instability.
What is the purpose of the LOGIC REFERENCE pin on AD8021ARMZ-REEL7?
The LOGIC REFERENCE pin (Pin 1) establishes the reference voltage for the DISABLE pin's logic threshold. When DISABLE (Pin 8) is ≥1.7 V above LOGIC REFERENCE, the amplifier is enabled; when within ~1.5 V, it disables. If unused, LOGIC REFERENCE must be grounded and DISABLE tied to +VS to ensure default enabled operation.
Can AD8021ARMZ-REEL7 drive a 75 Ω video line?
Yes, AD8021ARMZ-REEL7 is explicitly characterized to drive ±3 V video signals into 75 Ω loads. Its output stage delivers linear current up to 60 mA and maintains low distortion (−93 dBc HD2 at 1 MHz), satisfying NTSC video requirements with 0.03% differential gain error and 0.04° phase error - confirmed in the "Specifications" section (Page 3).
AD8021ARMZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 460V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 560 MHz
- Current - Input Bias:
- 7.5 µA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 7.8mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8021ARMZ-REEL7 FAQ
1.How can I place an order for AD8021ARMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8021ARMZ-REEL7 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 AD8021ARMZ-REEL7 reliable?
The price and inventory of AD8021ARMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8021ARMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8021ARMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8021ARMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8021ARMZ-REEL7?
AD8021ARMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8021ARMZ-REEL7 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 AD8021ARMZ-REEL7?
For technical support, including AD8021ARMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8021ARMZ-REEL7 requirements.
6.How does Aetrix verify that AD8021ARMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8021ARMZ-REEL7 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 AD8021ARMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8021ARMZ-REEL7?
All AD8021ARMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8021ARMZ-REEL7, 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 AD8021ARMZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8021ARMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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