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Analog Devices Inc. ADA4897-1ARJZ-R2
- Part No.:
- ADA4897-1ARJZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
ADA4897-1ARJZ-R2.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:329
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Product details
Overview
ADA4897-1ARJZ-R2 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 3 mA quiescent current per amplifier-enabling precision ADC driving and ultrasound preamplification in portable medical and test equipment.
For engineers reviewing the ADA4897-1ARJZ-R2 datasheet, ADA4897-1ARJZ-R2 pinout, ADA4897-1ARJZ-R2 application, or ADA4897-1ARJZ-R2 equivalent, key selection criteria include its 1 nV/√Hz wideband noise floor, disable functionality, SOIC-8 package compatibility, and verified performance across ±5 V, +5 V, and +3 V supplies with rail-to-rail output swing.
Technical Context
The ADA4897-1ARJZ-R2 employs Analog Devices' proprietary SiGe bipolar process to achieve unity-gain stability with 230 MHz bandwidth and 45 ns settling time to 0.1%. Its architecture integrates bias current cancellation and low 1/f noise (2.4 nV/√Hz at 10 Hz), supporting high-dynamic-range applications where DC precision and AC fidelity must coexist.
It features an active disable pin enabling <0.25 μs turn-on and 12 μs turn-off, reducing quiescent current to 0.13 mA (±5 V) or 0.05 mA (+5 V). Input common-mode range extends to within 0.1 V of rails, and output swings to within 140 mV of supply rails under 1 kΩ load-critical for low-voltage, high-fidelity buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 1 nV/√Hz at 100 kHz - enables high-SNR signal chain front-ends without degrading ADC ENOB. |
| −3 dB Bandwidth | 230 MHz at G = +1 - supports wideband signal acquisition up to ~70 MHz Nyquist frequency. |
| Slew Rate | 120 V/μs - ensures faithful reproduction of fast transients in pulse-based systems like ultrasound. |
| Quiescent Current | 3.0 mA per amplifier - balances speed and power for battery-operated instrumentation. |
| Disable Current | 0.05 mA at +5 V - allows dynamic power gating in multi-stage analog signal paths. |
| Rail-to-Rail Output | Swings to within 140 mV of rails (RL = 1 kΩ) - maximizes dynamic range in 3 V–10 V single/dual supplies. |
| Settling Time | 45 ns to 0.1% - meets timing budgets for >10 MSPS data conversion systems. |
Pinout & Package
The ADA4897-1ARJZ-R2 is packaged in an 8-lead SOIC (RJZ) with exposed pad. Pin 1 is NC (no connect); Pin 2 is inverting input; Pin 3 is noninverting input; Pin 4 is negative supply; Pin 5 is NC; Pin 6 is output; Pin 7 is positive supply; Pin 8 is disable control. The exposed pad improves thermal performance and may be connected to ground or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | No Connect | Must remain unconnected; no internal function or electrical path. |
| 2 | Inverting Input | Differential input node with 10 kΩ differential resistance and 11 pF capacitance. |
| 3 | Noninverting Input | Differential input node with 10 MΩ common-mode resistance and 3 pF capacitance. |
| 4 | Negative Supply | Reference for biasing; supports operation down to −VS − 0.7 V common-mode input. |
| 6 | Output | Rail-to-rail capable stage delivering up to ±135 mA short-circuit current. |
| 7 | Positive Supply | Primary power rail; PSRR > 120 dB up to 100 kHz ensures supply noise rejection. |
| 8 | Disable | Active-low logic input; disables amplifier core while maintaining input bias integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low wideband noise | 1 nV/√Hz at 100 kHz enables sub-16-bit ENOB preservation in 16+ MSPS ADC drivers. |
| Unity-gain stable architecture | 230 MHz bandwidth with G = +1 eliminates need for external compensation in buffer configurations. |
| Fast enable/disable control | 0.25 μs turn-on / 12 μs turn-off allows precise power sequencing in multi-amplifier signal chains. |
| Rail-to-rail output swing | Delivers 4.85 V output at +5 V supply into 1 kΩ - maximizes usable dynamic range in low-voltage systems. |
| Low 1/f noise corner | 2.4 nV/√Hz at 10 Hz supports precision DC-coupled amplification in sensor interfaces and PLL loop filters. |
Applications
| Ultrasound Preamp Stage | High-Speed ADC Driver |
|---|---|
Use Scenario: Amplifies weak RF echo signals (2–15 MHz) from piezoelectric transducers before digitization. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth gain stage with minimal added jitter and distortion. Use Value: 1 nV/√Hz noise floor preserves SNR across full imaging bandwidth; 45 ns settling ensures accurate sampling of transient echoes. | Use Scenario: Buffers analog inputs to high-resolution SAR or pipeline ADCs operating at ≥10 MSPS. IC Role / Device Role / Timing Role: Driver with rail-to-rail output swing and low distortion to maintain ENOB. Use Value: −115 dBc SFDR at 100 kHz prevents harmonic folding; 230 MHz bandwidth supports >70 MHz input tones. |
| PLL Loop Filter | DAC Output Buffer |
Use Scenario: Forms active low-pass filter in phase-locked loops for clock synthesis or frequency translation. IC Role / Device Role / Timing Role: Precision integrator with low DC offset drift and low 1/f noise. Use Value: 0.2 μV/°C offset drift minimizes loop error accumulation; 2.4 nV/√Hz at 10 Hz reduces phase noise near carrier. | Use Scenario: Isolates and buffers DAC output to drive variable-impedance loads (e.g., transmission lines, op-amp inputs). IC Role / Device Role / Timing Role: Low-distortion, fast-settling voltage follower with high output current capability. Use Value: 80 mA output current drives 100 Ω loads; 120 V/μs slew rate prevents slewing-induced distortion on fast DAC steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4899-1ARMZ | Higher 1.4 nV/√Hz noise at 1 kHz; 600 MHz bandwidth; no disable pin; MSOP-8 package. | Optimized for higher-frequency (>100 MHz) gain blocks where disable is unnecessary. | Choose ADA4899-1ARMZ when bandwidth >500 MHz is required and power gating is not needed. |
| AD8099ARDZ | 3 nV/√Hz noise at 1 kHz; 510 MHz bandwidth; no disable; SOIC-8; higher 12.6 mA quiescent current. | Better suited for ultra-high-speed, AC-coupled video or RF IF stages where noise is secondary to speed. | Choose AD8099ARDZ only when >400 MHz bandwidth is mandatory and system power budget permits 4× higher IQ. |
Compared with ADA4897-1ARJZ-R2, ADA4899-1ARMZ trades lower noise for higher bandwidth and no disable, while AD8099ARDZ sacrifices noise and power efficiency for raw speed-making ADA4897-1ARJZ-R2 optimal for precision, low-power, high-speed signal conditioning where dynamic range and supply flexibility matter most.
Availability
ADA4897-1ARJZ-R2 is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable test equipment, and high-resolution data acquisition requiring stable component supply, extended temperature operation (−40°C to +125°C), and consistent parametric performance across production lots.
Supply support for ADA4897-1ARJZ-R2 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, serving industrial, communications, automotive, and healthcare markets since 1965.
The ADA4897-1ARJZ-R2 belongs to Analog Devices' precision high-speed amplifier product line, engineered specifically for applications demanding simultaneous low noise, fast settling, rail-to-rail output, and low power-such as medical ultrasound, test instrumentation, and high-fidelity data converters.
FAQ
What is the maximum supply voltage for ADA4897-1ARJZ-R2?
The ADA4897-1ARJZ-R2 supports a total supply voltage range of 3 V to 10 V, with absolute maximum ratings specifying ±5.5 V dual supply or 11 V single supply. Exceeding 11 V risks permanent damage per the Absolute Maximum Ratings table. Operation at 10 V is fully characterized and supported across the −40°C to +125°C temperature range.
Does ADA4897-1ARJZ-R2 support single-supply operation?
Yes, ADA4897-1ARJZ-R2 supports true single-supply operation from 3 V to 10 V. Its input common-mode range extends to 0.1 V above −VS (i.e., ground in single-supply mode), and output swings within 140 mV of both rails into 1 kΩ, enabling full-scale signal handling without level-shifting circuitry.
What is the purpose of the DISABLE pin on ADA4897-1ARJZ-R2?
The DISABLE pin on ADA4897-1ARJZ-R2 provides active-low control to reduce quiescent current to ≤0.25 mA (typical) while preserving input bias integrity. When disabled, the output enters high-impedance state, preventing loading of downstream stages-ideal for power-gated signal chains in portable or energy-constrained systems.
Can ADA4897-1ARJZ-R2 drive heavy capacitive loads?
ADA4897-1ARJZ-R2 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 feedback compensation per Figure 15 in the datasheet. Uncompensated loads >50 pF risk instability or degraded settling behavior.
Is ADA4897-1ARJZ-R2 pin-compatible with other members of the ADA489x family?
No, ADA4897-1ARJZ-R2 is not pin-compatible with ADA4896-2 or ADA4897-2 due to differing channel count and pin assignments. Its SOIC-8 footprint matches only the ADA4897-1 variants (e.g., ADA4897-1ARJZ-R7), not the dual-channel ADA4897-2 (10-lead MSOP) or ADA4896-2 (8-lead LFCSP/MSOP).
ADA4897-1ARJZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- SOT-23-6
ADA4897-1ARJZ-R2 FAQ
1.How can I place an order for ADA4897-1ARJZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4897-1ARJZ-R2 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 ADA4897-1ARJZ-R2 reliable?
The price and inventory of ADA4897-1ARJZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4897-1ARJZ-R2 is usually 5 days.
3.What payment methods are accepted for ADA4897-1ARJZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4897-1ARJZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4897-1ARJZ-R2?
ADA4897-1ARJZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4897-1ARJZ-R2 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 ADA4897-1ARJZ-R2?
For technical support, including ADA4897-1ARJZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4897-1ARJZ-R2 requirements.
6.How does Aetrix verify that ADA4897-1ARJZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADA4897-1ARJZ-R2 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 ADA4897-1ARJZ-R2 meets industry standards.
7.What is the process for return or replacement of ADA4897-1ARJZ-R2?
All ADA4897-1ARJZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4897-1ARJZ-R2, 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 ADA4897-1ARJZ-R2 part is unused and in its original packaging.
Return procedure for ADA4897-1ARJZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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