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Analog Devices Inc. ADA4897-2ARMZ-R7
- Part No.:
- ADA4897-2ARMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADA4897-2ARMZ-R7.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
ADA4897-2ARMZ-R7 from Analog Devices is a dual, low-noise, rail-to-rail output voltage feedback amplifier with 1 nV/√Hz input voltage noise at 100 kHz, 230 MHz −3 dB bandwidth (G = +1), 120 V/μs slew rate, and 3 mA per amplifier quiescent current. It features independent disable pins for each channel and operates from 3 V to 10 V supplies, targeting high-fidelity ADC driver and ultrasound preamplifier applications.
For engineers reviewing the ADA4897-2ARMZ-R7 datasheet, ADA4897-2ARMZ-R7 pinout, ADA4897-2ARMZ-R7 application, or ADA4897-2ARMZ-R7 equivalent, key selection criteria include its 10-lead MSOP package, dual-channel disable control, 45 ns settling time to 0.1%, −115 dBc SFDR at 100 kHz, and guaranteed operation from −40°C to +125°C.
Technical Context
The ADA4897-2ARMZ-R7 uses Analog Devices' SiGe bipolar process to achieve ultra-low wideband and 1/f noise while maintaining unity-gain stability. Its architecture supports both single- and dual-supply operation, with rail-to-rail output swing delivering >4.8 V p-p into 1 kΩ on ±5 V supplies.
Each amplifier includes a dedicated disable pin (pins 5 and 6) enabling independent power gating with 0.25 μs enable and 12 μs disable switching times. Input common-mode range extends to within 0.1 V of rails, and CMRR exceeds −90 dB up to 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 1 nV/√Hz at 100 kHz - enables high-resolution signal conditioning in low-amplitude sensor interfaces. |
| −3 dB Bandwidth | 230 MHz at G = +1 - supports wideband signal acquisition without gain-dependent bandwidth collapse. |
| Slew Rate | 120 V/μs - ensures faithful reproduction of fast transient signals in ADC front-ends. |
| Settling Time | 45 ns to 0.1% - meets timing budgets for 10+ MSPS precision data converters. |
| Quiescent Current | 3.0 mA per amplifier - balances performance and power in battery-sensitive or thermally constrained systems. |
| Supply Range | 3 V to 10 V - allows interoperability with 3.3 V, 5 V, and ±5 V system rails without level-shifting. |
| Output Swing | Rail-to-rail, 4.96 V max positive / −4.97 V max negative on ±5 V - maximizes dynamic range into ADC inputs. |
Pinout & Package
The ADA4897-2ARMZ-R7 is housed in a 10-lead MSOP package with exposed pad. The package footprint is compatible with standard surface-mount reflow processes and supports thermal management via the exposed pad, which may be connected to ground, power planes, or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - drives external load or ADC input with rail-to-rail swing and low distortion. |
| 2 | −IN1 | Inverting input of Amp 1 - used for inverting configurations or feedback network connection. |
| 3 | +IN1 | Noninverting input of Amp 1 - accepts high-impedance sensor or reference signals with 10 MΩ common-mode resistance. |
| 4 | −VS | Negative supply rail - referenced to system ground in single-supply mode or negative rail in dual-supply mode. |
| 5 | DISABLE1 | Enable/disable control for Amp 1 - logic-high (>+VS − 0.5 V) enables; logic-low (<−VS + 2 V) disables to 0.25 mA. |
| 6 | DISABLE2 | Enable/disable control for Amp 2 - independent of DISABLE1, enabling selective channel power-down. |
| 7 | +IN2 | Noninverting input of Amp 2 - electrically isolated from Amp 1 inputs to minimize crosstalk (<−120 dB at 1 MHz). |
| 8 | −IN2 | Inverting input of Amp 2 - supports differential or single-ended configurations without inter-channel interference. |
| 9 | OUT2 | Amplifier 2 output - fully matched to OUT1 in noise, bandwidth, and settling behavior. |
| 10 | +VS | Positive supply rail - supplies both amplifiers; PSRR > 120 dB suppresses supply ripple coupling into output. |
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 instrumentation front-ends. |
| High-speed settling | 45 ns to 0.1% - eliminates dead time between ADC conversions in time-interleaved or multiplexed systems. |
| Independent channel disable | Dual DISABLE pins (pins 5 & 6) - enables dynamic power scaling in multi-channel data acquisition without PCB layout changes. |
| Rail-to-rail output | Swings within 40 mV of rails on ±5 V - delivers full-scale signal to 16-bit+ ADCs without headroom loss. |
| Wide supply range | 3 V to 10 V operation - supports direct interface to Li-ion, USB, and industrial 5 V/±5 V rails without regulators. |
Applications
| Ultrasound Signal Chain | High-Speed Data Acquisition |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable and cart-based ultrasound systems. IC Role / Device Role / Timing Role: Low-noise preamplifier and anti-alias filter driver with <1 nV/√Hz noise floor and 230 MHz bandwidth. Use Value: Enables detection of sub-millimeter tissue structures by preserving SNR across 1–15 MHz imaging bands. | Use Scenario: Driving the analog inputs of 16-bit, 2.5 MSPS successive-approximation ADCs in test equipment and industrial DAQ. IC Role / Device Role / Timing Role: High-fidelity ADC driver with 45 ns settling and −115 dBc SFDR at 100 kHz. Use Value: Maintains ENOB > 15 bits at full throughput by minimizing harmonic distortion and aperture jitter. |
| PLL Loop Filter | DAC Output Buffer |
Use Scenario: Implementing active loop filters in RF synthesizers requiring low phase noise and wide loop bandwidth. IC Role / Device Role / Timing Role: Low-noise, high-slew op-amp in third-order charge-pump PLL filters. Use Value: Reduces integrated phase noise by suppressing op-amp voltage noise contribution below 100 kHz. | Use Scenario: Buffering high-resolution DAC outputs in precision waveform generators and calibration sources. IC Role / Device Role / Timing Role: Rail-to-rail output buffer with 0.5 mV max offset and 0.2 μV/°C drift. Use Value: Delivers <0.001% gain error and <1 ppm/°C thermal drift over industrial temperature range. |
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 |
|---|---|---|---|
| ADA4896-2ACPZ-R7 | No disable function; 8-lead LFCSP package; lower θJA (61°C/W vs. 210°C/W); identical noise and bandwidth specs. | Better thermal performance in space-constrained PCBs; unsuitable where per-channel shutdown is required. | Select when thermal management is critical and disable functionality is unnecessary. |
| AD8099ARDZ | Higher 100 kHz noise (0.95 nV/√Hz); no disable pins; 3.3–12 V supply; 510 MHz bandwidth but higher quiescent current (11.5 mA). | Preferred for pure speed-critical applications above 300 MHz; less suitable for low-power or thermally sensitive designs. | Select only when bandwidth > 300 MHz is mandatory and power budget allows >3× current draw. |
Compared with ADA4896-2ACPZ-R7 and AD8099ARDZ, the ADA4897-2ARMZ-R7 uniquely combines dual-channel disable control, 10-lead MSOP packaging, and best-in-class 1 nV/√Hz noise at 3 mA - making it optimal for portable ultrasound and multi-channel precision DAQ where power, noise, and channel independence are jointly constrained.
Availability
ADA4897-2ARMZ-R7 is available at Aetrix Electronics and suitable for ultrasound imaging systems, high-speed data acquisition modules, and PLL-based frequency synthesis requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature range operation.
Supply support for ADA4897-2ARMZ-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 demanding signal-chain applications including medical ultrasound, high-resolution data conversion, and precision instrumentation - emphasizing ultra-low noise, high speed, and robust rail-to-rail operation.
FAQ
What is the operating temperature range for the ADA4897-2ARMZ-R7?
The ADA4897-2ARMZ-R7 is specified to operate across the extended industrial temperature range of −40°C to +125°C. This rating is validated per the datasheet's Absolute Maximum Ratings and Typical Performance Characteristics sections, ensuring parametric stability in harsh environments such as automotive engine compartments or industrial PLC modules. All key specifications-including noise, bandwidth, and offset drift-are guaranteed over this full range for the ADA4897-2ARMZ-R7.
Does the ADA4897-2ARMZ-R7 support single-supply operation?
Yes, the ADA4897-2ARMZ-R7 supports true single-supply operation from 3 V to 10 V. With an input common-mode voltage range extending from 0.1 V to (VS − 0.8 V) and rail-to-rail output swing, it functions correctly with −VS tied to ground. For example, on +5 V supply, input range is 0.1 V to 4.1 V and output swings from 0.014 V to 4.98 V into 1 kΩ - confirmed in Table 4 of the ADA4897-2ARMZ-R7 datasheet.
What is the purpose of the DISABLE pins on the ADA4897-2ARMZ-R7?
The ADA4897-2ARMZ-R7 features two independent DISABLE pins (pins 5 and 6) that allow per-channel power-down. When pulled below +VS − 2 V (e.g., to ground in single-supply mode), each amplifier reduces quiescent current to ≤0.25 mA while maintaining high output impedance. This enables dynamic power management in multi-channel systems - for instance, disabling unused channels in a 16-channel ultrasound receive path to cut total supply current by up to 50% without affecting active channels.
Can the ADA4897-2ARMZ-R7 drive heavy capacitive loads?
The ADA4897-2ARMZ-R7 is characterized to drive up to 39 pF capacitive load with ≤30% overshoot at G = +2, as stated in Tables 3–5. Driving larger loads (e.g., >50 pF) requires external isolation resistance (typically 10–50 Ω in series with the output) to maintain stability. This capability is verified in Figure 15 of the ADA4897-2ARMZ-R7 datasheet, showing stable small-signal response with CL = 0 pF, 20 pF, and 39 pF.
How does the ADA4897-2ARMZ-R7 compare to the ADA4896-2 in terms of noise performance?
The ADA4897-2ARMZ-R7 and ADA4896-2 share identical noise specifications: 1 nV/√Hz at 100 kHz and 2.4 nV/√Hz at 10 Hz. Both use the same SiGe process and core amplifier topology. The primary distinction lies in functionality - ADA4897-2ARMZ-R7 adds dual DISABLE pins and uses a 10-lead MSOP package, whereas ADA4896-2 lacks disable and comes in 8-lead MSOP or LFCSP. Noise, bandwidth, and distortion are fully matched between the two families for the ADA4897-2ARMZ-R7.
ADA4897-2ARMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 120V/µs
- Gain Bandwidth Product:
- 90 MHz
- -3db Bandwidth:
- 230 MHz
- Current - Input Bias:
- 4 µA
- Voltage - Input Offset:
- 28 µV
- Current - Supply:
- 3mA (x2 Channels)
- 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:
- 10-MSOP
ADA4897-2ARMZ-R7 FAQ
1.How can I place an order for ADA4897-2ARMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4897-2ARMZ-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 ADA4897-2ARMZ-R7 reliable?
The price and inventory of ADA4897-2ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4897-2ARMZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4897-2ARMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4897-2ARMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4897-2ARMZ-R7?
ADA4897-2ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4897-2ARMZ-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 ADA4897-2ARMZ-R7?
For technical support, including ADA4897-2ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4897-2ARMZ-R7 requirements.
6.How does Aetrix verify that ADA4897-2ARMZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4897-2ARMZ-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 ADA4897-2ARMZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4897-2ARMZ-R7?
All ADA4897-2ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4897-2ARMZ-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 ADA4897-2ARMZ-R7 part is unused and in its original packaging.
Return procedure for ADA4897-2ARMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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