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Analog Devices Inc. ADA4897-1ARZ
- Part No.:
- ADA4897-1ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4897-1ARZ.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:322
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Product details
Overview
ADA4897-1ARZ from Analog Devices is a single-channel, rail-to-rail output, voltage-feedback operational amplifier optimized for low-noise, high-speed signal conditioning in precision analog systems. 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 - enabling use in ultrasound preamplifiers, PLL loop filters, and high-performance ADC drivers.
For engineers reviewing the ADA4897-1ARZ datasheet, ADA4897-1ARZ pinout, ADA4897-1ARZ application, or ADA4897-1ARZ equivalent, this page provides verified specifications, SOIC-8 package details, disable functionality, thermal resistance (133°C/W), and validated alternative options for low-noise amplifier selection.
Technical Context
The ADA4897-1ARZ employs Analog Devices' proprietary SiGe bipolar process to achieve unity-gain stability with ultra-low 1/f noise (2.4 nV/√Hz at 10 Hz) and high SFDR (−115 dBc at 100 kHz). Its disable pin enables power gating with 0.25 μs turn-on and 12 μs turn-off timing, reducing quiescent current from 3 mA to 0.25 mA.
Designed for wide supply operation (±1.5 V to ±5 V or +3 V to +10 V), it maintains rail-to-rail output swing (e.g., ±4.85 V on ±5 V), 110 dB open-loop gain, and robust capacitive load drive up to 39 pF - supporting direct interface with SAR ADCs and high-resolution DACs without external isolation.
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 sensor front-ends. |
| −3 dB Bandwidth | 230 MHz at G = +1 - supports wideband applications including ultrasound imaging and RF IF stages. |
| Slew Rate | 120 V/μs - ensures faithful reproduction of fast transient signals in ADC driver and pulse amplification circuits. |
| Quiescent Current | 3.0 mA per amplifier - balances low-power operation with high-speed performance for battery-sensitive instrumentation. |
| Disable Current | 0.25 mA typical when disabled - allows dynamic power management in multi-stage analog signal chains. |
| Rail-to-Rail Output | Swings within 150 mV of rails (e.g., 0.15 V to 4.85 V on +5 V) - maximizes dynamic range in single-supply data acquisition systems. |
| Operating Temp Range | −40°C to +125°C - qualified for industrial and automotive under-hood signal conditioning applications. |
Pinout & Package
The ADA4897-1ARZ is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with exposed pad option, offering 133°C/W junction-to-ambient thermal resistance on standard PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | No Connect (NC) | Internally unconnected; must remain floating - no routing or grounding required. |
| 2 | Inverting Input (−IN) | Differential input node; requires matched trace impedance and guarding for optimal noise rejection. |
| 3 | Noninverting Input (+IN) | High-impedance input (10 MΩ common-mode); sensitive to layout parasitics and EMI coupling. |
| 4 | Negative Supply (−VS) | Reference for dual-supply operation; connects to ground in single-supply configurations. |
| 6 | Output (OUT) | Rail-to-rail capable output; drives ≥70 mA into 1 kΩ and sustains 39 pF capacitive loads. |
| 7 | Positive Supply (+VS) | Accepts 3 V to 10 V; bypassing with 0.1 μF ceramic capacitor near pin is mandatory for stability. |
| 8 | Disable (DISABLE) | Active-high control: >+VS − 0.5 V enables, <+VS − 2 V disables - enables low-power sleep mode. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1/f noise | 2.4 nV/√Hz at 10 Hz - preserves signal integrity in DC-coupled medical and seismic sensing paths. |
| High-speed settling | 45 ns to 0.1% - meets timing budgets for 10+ MSPS SAR ADC sampling clocks and multiplexed channel switching. |
| Wide supply range | 3 V to 10 V operation - eliminates level-shifting in mixed-voltage systems using 3.3 V logic and 5 V analog rails. |
| Integrated disable function | 0.25 μs enable time - supports burst-mode acquisition and synchronized power gating across multi-amplifier signal chains. |
| Robust PSRR/CMRR | −125 dB PSRR (positive), −120 dB CMRR - rejects supply ripple and common-mode interference in noisy industrial environments. |
Applications
| Ultrasound Preamp Stage | High-Speed ADC Driver |
|---|---|
Use Scenario: Amplifies microvolt-level echoes from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: First-stage low-noise gain block with 1 nV/√Hz noise floor and 230 MHz bandwidth. Use Value: Enables detection of deep-tissue structures by preserving SNR through initial amplification before digitization. | Use Scenario: Drives the input of 16-bit, 2.5 MSPS SAR ADCs (e.g., AD7985) in precision data loggers. IC Role / Device Role / Timing Role: Buffer and level-shifter delivering full-scale 2 Vp-p signals with <45 ns settling. Use Value: Prevents missing codes and distortion by meeting ADC aperture jitter and settling requirements. |
| PLL Loop Filter | DAC Output Buffer |
Use Scenario: Forms active low-pass filter in frequency synthesizer loops for wireless base stations. IC Role / Device Role / Timing Role: Integrator stage shaping loop dynamics with low drift and minimal phase noise contribution. Use Value: Reduces spurious tones and improves spectral purity via 0.2 μV/°C offset drift and 2.4 nV/√Hz 1/f noise. | Use Scenario: Buffers voltage outputs from high-resolution DACs (e.g., AD5791) in calibration equipment. IC Role / Device Role / Timing Role: Rail-to-rail output stage maintaining monotonicity and THD <−115 dBc at 100 kHz. Use Value: Ensures accurate DC and low-frequency stimulus generation without gain error or settling artifacts. |
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 |
|---|---|---|---|
| ADA4899-1ARZ | Higher bandwidth (600 MHz), higher supply current (12.5 mA), no disable pin. | Better suited for RF/IF gain blocks where speed outweighs power constraints. | Select ADA4899-1ARZ when >300 MHz small-signal bandwidth is required and disable functionality is unnecessary. |
| AD8099ARDZ | Lower noise floor (0.95 nV/√Hz at 100 kHz), higher quiescent current (11.5 mA), no rail-to-rail output. | Preferred for ultra-low-noise DC-coupled instrumentation where output swing margin is available. | Choose AD8099ARDZ when absolute minimum voltage noise dominates over power and output swing requirements. |
Compared with ADA4897-1ARZ, ADA4899-1ARZ trades 4× higher supply current for 2.6× bandwidth and no power-gating capability, while AD8099ARDZ offers lower noise but sacrifices rail-to-rail output and adds 3.8× quiescent power - making ADA4897-1ARZ optimal for balanced low-noise, low-power, wide-swing applications.
Availability
ADA4897-1ARZ is available at Aetrix Electronics and suitable for ultrasound imaging systems, precision data acquisition modules, and industrial PLL-based clock generators requiring stable component supply across extended temperature ranges.
Supply support for ADA4897-1ARZ 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 ADA4897-1ARZ belongs to Analog Devices' precision high-speed amplifier product line, engineered for applications demanding ultra-low noise, fast settling, and rail-to-rail output in space- and power-constrained systems.
FAQ
What is the maximum capacitive load the ADA4897-1ARZ can drive while maintaining stability?
The ADA4897-1ARZ is characterized to drive up to 39 pF with ≤30% overshoot at G = +2. Driving larger capacitive loads requires external isolation (e.g., series resistor) or compensation network redesign. This capability enables direct connection to ADC inputs and long PCB traces without oscillation, as confirmed in Table 3 and Figure 15 of the ADA4897-1ARZ datasheet.
Does the ADA4897-1ARZ support single-supply operation?
Yes, the ADA4897-1ARZ operates from a single +3 V to +10 V supply. With rail-to-rail output and input common-mode range extending to 0.1 V above −VS (ground in single-supply), it supports true single-rail designs. The −VS pin connects to ground, and the DISABLE pin threshold scales with +VS, ensuring reliable control across the full supply range.
What is the purpose of pins 1 and 5 on the ADA4897-1ARZ SOIC package?
Pins 1 and 5 of the ADA4897-1ARZ are designated No Connect (NC) terminals. They are not bonded internally and must remain unconnected - neither grounded nor routed. This is explicitly stated in Table 9 and Figure 6 of the official ADA4897-1ARZ datasheet to prevent unintended parasitic coupling or mechanical stress on the die.
How does the disable function affect quiescent current in the ADA4897-1ARZ?
When disabled, the ADA4897-1ARZ reduces quiescent current from 3.0 mA (typical) to 0.25 mA (typical), achieving >90% power reduction. This state is entered when the DISABLE pin voltage falls below +VS − 2 V, and recovery to full operation occurs within 0.25 μs after reassertion - enabling rapid duty-cycled operation in battery-powered DAQ systems.
Is the ADA4897-1ARZ pin-compatible with other members of the ADA489x family?
No, the ADA4897-1ARZ (8-lead SOIC) is not pin-compatible with ADA4896-2 (dual, 8-lead LFCSP/MSOP) or ADA4897-2 (dual, 10-lead MSOP). Pin counts, pin functions (e.g., DISABLE presence), and physical footprints differ. Substitution requires PCB layout revision; only the 6-lead SOT-23 variant (ADA4897-1AKSZ) shares functional equivalence but differs in pinout and thermal performance.
ADA4897-1ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ADA4897-1ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4897-1ARZ 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 reliable?
The price and inventory of ADA4897-1ARZ 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 is usually 5 days.
3.What payment methods are accepted for ADA4897-1ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4897-1ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4897-1ARZ?
ADA4897-1ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4897-1ARZ 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?
For technical support, including ADA4897-1ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4897-1ARZ requirements.
6.How does Aetrix verify that ADA4897-1ARZ is sourced from the original manufacturer or authorized distributors?
All ADA4897-1ARZ 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 meets industry standards.
7.What is the process for return or replacement of ADA4897-1ARZ?
All ADA4897-1ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4897-1ARZ, 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 part is unused and in its original packaging.
Return procedure for ADA4897-1ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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