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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. ADA4897-1ARZ-R7

Name: ADA4897-1ARZ-R7
Brand: Analog Devices Inc.
SKU: ADA4897-1ARZ-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADA4897-1ARZ-R7

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ADA4897-1ARZ-R7.pdf

Description:: IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

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Product details

Overview

ADA4897-1ARZ-R7 from Analog Devices is a single-channel, rail-to-rail output, voltage-feedback operational amplifier optimized for low-noise, high-speed signal conditioning. It delivers 1 nV/√Hz input voltage noise at 100 kHz, 230 MHz −3 dB bandwidth (G = +1), 120 V/μs slew rate, and operates from 3 V to 10 V supplies - ideal for precision ADC driver and ultrasound preamplifier applications.

For engineers reviewing the ADA4897-1ARZ-R7 datasheet, ADA4897-1ARZ-R7 pinout, ADA4897-1ARZ-R7 application, or ADA4897-1ARZ-R7 equivalent, this page provides verified specifications, SOIC-8 package details, disable functionality, thermal performance data, and validated alternative options for low-noise, high-speed op-amp selection.

Technical Context

The ADA4897-1ARZ-R7 uses Analog Devices' SiGe bipolar process to achieve unity-gain stability with 2.4 nV/√Hz 1/f noise at 10 Hz and −115 dBc SFDR at 100 kHz. Its architecture supports rail-to-rail output swing (±4.96 V on ±5 V) and features an integrated disable pin enabling <0.25 μs turn-on and 12 μs turn-off switching.

It maintains 45 ns settling time to 0.1% across supply voltages (3 V to 10 V), exhibits 10 MΩ common-mode input resistance, and achieves −120 dB CMRR at DC while preserving >−90 dB up to 100 kHz - critical for high-dynamic-range sensor interface and PLL loop filter designs.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Noise	1 nV/√Hz at 100 kHz - enables high-fidelity amplification of weak signals without degrading SNR in front-end stages.
−3 dB Bandwidth	230 MHz at G = +1 - supports wideband signal acquisition up to ~100 MHz with minimal gain roll-off.
Slew Rate	120 V/μs - ensures faithful reproduction of fast transient signals such as ultrasound pulses or DAC output edges.
Quiescent Current	3 mA per amplifier - balances low power consumption with high-speed performance for battery-sensitive or thermally constrained systems.
Disable Current	0.25 mA max when disabled - reduces system-level standby power in multi-amplifier configurations.
Rail-to-Rail Output	Swings within 40 mV of rails (e.g., 4.96 V on +5 V) - maximizes dynamic range into ADCs or downstream analog circuitry.
Operating Temp Range	−40°C to +125°C - qualified for industrial, medical, and automotive environments requiring extended thermal reliability.

Pinout & Package

ADA4897-1ARZ-R7 is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with exposed pad option. Thermal resistance θ_JA is 133°C/W on JEDEC 4-layer board. Pin 1 is NC (no connect); Pin 8 is +VS; Pin 4 is −VS; Pin 6 is OUT; Pin 2 is −IN; Pin 3 is +IN; Pin 5 is DISABLE.

Pin/Terminal	Circuit Role	Design Meaning
1, 5	NC	No internal connection - must remain unconnected per datasheet; floating or tied to ground may cause instability.
2	Inverting Input (−IN)	Differential input node accepting feedback network; high impedance (10 kΩ differential) minimizes loading effects.
3	Noninverting Input (+IN)	High-impedance (10 MΩ common-mode) input for reference or signal source; low input bias current (−11 μA typ) reduces offset drift.
4	Negative Supply (−VS)	Ground reference in single-supply operation or negative rail in dual-supply; supports −4.9 V to +4.1 V common-mode input range.
6	Output (OUT)	Rail-to-rail capable output driving ≥70 mA into 1 kΩ; stable with up to 39 pF capacitive load.
7	Positive Supply (+VS)	Primary power input; accepts 3 V to 10 V; PSRR >120 dB suppresses supply ripple from affecting output accuracy.
8	Disable (DISABLE)	Active-high control pin; >+VS − 0.5 V enables, <+VS − 2 V disables; reduces quiescent current to 0.25 mA.

Key Features

Feature	Design Value
Low 1/f noise	2.4 nV/√Hz at 10 Hz - preserves signal integrity in DC-coupled, low-frequency applications like medical instrumentation.
Unity-gain stable	Operates reliably at G = +1 without external compensation - simplifies PCB layout and reduces BOM count.
Fast disable switching	0.25 μs enable / 12 μs disable - enables precise timing control in burst-mode or power-gated signal chains.
Wide supply range	3 V to 10 V operation - supports both low-voltage portable systems and higher-voltage industrial interfaces without redesign.
High open-loop gain	110 dB typical - ensures low closed-loop error and high linearity in precision gain stages.

Applications

Ultrasound Signal Chain	High-Speed ADC Driver
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable ultrasound systems. IC Role / Device Role / Timing Role: Low-noise preamplifier with 230 MHz bandwidth and 1 nV/√Hz noise floor before analog filtering and digitization. Use Value: Enables detection of sub-millimeter tissue structures by preserving SNR through first-stage amplification.	Use Scenario: Driving the input of 14–18-bit SAR ADCs (e.g., AD7986) in data acquisition systems. IC Role / Device Role / Timing Role: Buffer and level-shifter delivering fast settling (45 ns to 0.1%) and rail-to-rail swing into ADC's switched-capacitor input. Use Value: Prevents missing codes and distortion during high-throughput sampling by minimizing settling error and charge kickback.
PLL Loop Filter	DAC Output Buffer
Use Scenario: Implementing active loop filters in RF synthesizers requiring low phase noise and high DC accuracy. IC Role / Device Role / Timing Role: Integrator stage shaping loop dynamics with low input bias current (−11 μA) and low 1/f noise (2.4 nV/√Hz). Use Value: Reduces spurious tones and jitter accumulation in frequency synthesis by minimizing integrator drift and noise injection.	Use Scenario: Conditioning output of high-resolution DACs (e.g., AD5791) in precision test equipment and calibration sources. IC Role / Device Role / Timing Role: Low-distortion buffer (−115 dBc SFDR at 100 kHz) isolating DAC core from load variations and maintaining monotonicity. Use Value: Ensures accurate voltage/current sourcing with <0.01% THD+N, critical for metrology-grade output stages.

Ultrasound Signal Chain

High-Speed ADC Driver

Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable ultrasound systems.

IC Role / Device Role / Timing Role: Low-noise preamplifier with 230 MHz bandwidth and 1 nV/√Hz noise floor before analog filtering and digitization.

Use Value: Enables detection of sub-millimeter tissue structures by preserving SNR through first-stage amplification.

Use Scenario: Driving the input of 14–18-bit SAR ADCs (e.g., AD7986) in data acquisition systems.

IC Role / Device Role / Timing Role: Buffer and level-shifter delivering fast settling (45 ns to 0.1%) and rail-to-rail swing into ADC's switched-capacitor input.

Use Value: Prevents missing codes and distortion during high-throughput sampling by minimizing settling error and charge kickback.

PLL Loop Filter

DAC Output Buffer

Use Scenario: Implementing active loop filters in RF synthesizers requiring low phase noise and high DC accuracy.

IC Role / Device Role / Timing Role: Integrator stage shaping loop dynamics with low input bias current (−11 μA) and low 1/f noise (2.4 nV/√Hz).

Use Value: Reduces spurious tones and jitter accumulation in frequency synthesis by minimizing integrator drift and noise injection.

Use Scenario: Conditioning output of high-resolution DACs (e.g., AD5791) in precision test equipment and calibration sources.

IC Role / Device Role / Timing Role: Low-distortion buffer (−115 dBc SFDR at 100 kHz) isolating DAC core from load variations and maintaining monotonicity.

Use Value: Ensures accurate voltage/current sourcing with <0.01% THD+N, critical for metrology-grade output stages.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, high-speed op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADA4899-1ARMZ-R7	Higher bandwidth (600 MHz), higher supply current (12.5 mA), no disable pin, 8-lead MSOP only.	Better suited for RF IF amplification or ultra-fast pulse shaping where power budget allows.	Select ADA4899-1ARMZ-R7 when bandwidth >300 MHz is required and disable functionality is unnecessary.
AD8099ARDZ-R7	Lower noise (0.95 nV/√Hz at 100 kHz), higher quiescent current (11.5 mA), no disable, 8-lead SOIC.	Preferred for ultra-low-noise applications where power dissipation is secondary to SNR optimization.	Choose AD8099ARDZ-R7 when 0.95 nV/√Hz noise is mandatory and system thermal design accommodates higher I_Q.

Compared with ADA4897-1ARZ-R7, ADA4899-1ARMZ-R7 trades lower power and disable capability for higher speed, while AD8099ARDZ-R7 sacrifices power efficiency and feature set to achieve marginally lower broadband noise - making ADA4897-1ARZ-R7 the optimal balance for portable, battery-aware, or multi-channel systems requiring dynamic power control.

Availability

ADA4897-1ARZ-R7 is available at Aetrix Electronics and suitable for high-speed ADC drivers, ultrasound preamplifiers, and PLL loop filters requiring stable component supply, long-term industrial temperature support (−40°C to +125°C), and consistent parametric performance across production lots.

Supply support for ADA4897-1ARZ-R7 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.

The ADA4897 family was designed specifically for low-noise, high-speed signal conditioning in medical imaging, test equipment, and precision data acquisition - emphasizing unity-gain stability, rail-to-rail output, and integrated power management.

FAQ

What is the maximum capacitive load the ADA4897-1ARZ-R7 can drive stably?

The ADA4897-1ARZ-R7 is characterized for stable operation with up to 39 pF capacitive load at G = +2 with ≤30% overshoot. Driving larger loads requires external isolation resistor (e.g., 10–50 Ω in series with output) or careful PCB layout to avoid peaking or oscillation. This specification is confirmed in Table 3 and Figure 15 of the Rev. B datasheet.

Does the ADA4897-1ARZ-R7 support single-supply operation?

Yes, the ADA4897-1ARZ-R7 supports true single-supply operation from 3 V to 10 V. With −VS grounded, its input common-mode range extends from 0.1 V to 2.1 V (at +3 V) or 0.1 V to 4.1 V (at +5 V), and output swings rail-to-rail - enabling direct interfacing with microcontrollers, ADCs, and DACs in 3.3 V or 5 V systems.

What is the function of Pins 1 and 5 on the ADA4897-1ARZ-R7 SOIC package?

Pins 1 and 5 of the ADA4897-1ARZ-R7 are designated NC (No Connect) and must remain unconnected. Per Table 9 and Figure 6 of the datasheet, these pins have no internal connection; routing traces or applying voltage to them risks instability or parametric deviation. The exposed pad (if present) may be left floating or connected to ground.

How does the DISABLE pin behave under different supply conditions?

The DISABLE pin of the ADA4897-1ARZ-R7 is referenced to +VS: it enables when voltage exceeds +VS − 0.5 V and disables when below +VS − 2 V. At +3 V supply, disabling occurs below +1 V; at +5 V, below +3 V. Input current is −1.2 μA when enabled and −15 μA when disabled (3 V) - ensuring predictable low-power state transitions across the full supply range.

Is the ADA4897-1ARZ-R7 pin-compatible with other members of the ADA4896/ADA4897 family?

No, the ADA4897-1ARZ-R7 is not pin-compatible with ADA4896-2 or ADA4897-2. It uses an 8-lead SOIC package with unique pinout (e.g., DISABLE on Pin 8), whereas ADA4896-2 is dual-channel in 8-lead LFCSP/MSOP and ADA4897-2 is dual-channel in 10-lead MSOP. Only the 6-lead SOT-23 variant of ADA4897-1 shares functional equivalence but differs in pin assignment and thermal performance.

ADA4897-1ARZ-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: Voltage Feedback

Number of Circuits:: 1

Output Type:: Rail-to-Rail

Slew Rate:: 120V/µs

Gain Bandwidth Product:: -

-3db Bandwidth:: 230 MHz

Current - Input Bias:: 11 µA

Voltage - Input Offset:: 28 µV

Current - Supply:: 3mA

Current - Output / Channel:: 80 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 10 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

ADA4897-1ARZ-R7 FAQ

1.How can I place an order for ADA4897-1ARZ-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4897-1ARZ-R7 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 ADA4897-1ARZ-R7 reliable?

The price and inventory of ADA4897-1ARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4897-1ARZ-R7 is usually 5 days.

3.What payment methods are accepted for ADA4897-1ARZ-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4897-1ARZ-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4897-1ARZ-R7?

ADA4897-1ARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4897-1ARZ-R7 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 ADA4897-1ARZ-R7?

For technical support, including ADA4897-1ARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4897-1ARZ-R7 requirements.

6.How does Aetrix verify that ADA4897-1ARZ-R7 is sourced from the original manufacturer or authorized distributors?

All ADA4897-1ARZ-R7 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 ADA4897-1ARZ-R7 meets industry standards.

7.What is the process for return or replacement of ADA4897-1ARZ-R7?

All ADA4897-1ARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4897-1ARZ-R7, 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 ADA4897-1ARZ-R7 part is unused and in its original packaging.

Return procedure for ADA4897-1ARZ-R7:

1.Submit a request within 90 days.

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

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