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

Analog Devices Inc. ADA4895-2ARMZ-R7

Name: ADA4895-2ARMZ-R7
Brand: Analog Devices Inc.
SKU: ADA4895-2ARMZ-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADA4895-2ARMZ-R7

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: ADA4895-2ARMZ-R7.pdf

Description:: IC OPAMP VFB 2 CIRCUIT 10MSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADA4895-2ARMZ-R7 from Analog Devices is a dual, 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, 236 MHz −3 dB bandwidth (G = +10), 943 V/µs slew rate, and 22 ns settling to 0.1%, operating from 3 V to 10 V supplies. It is widely used as an ADC driver in high-resolution data acquisition systems.

For engineers reviewing the ADA4895-2ARMZ-R7 datasheet, ADA4895-2ARMZ-R7 pinout, ADA4895-2ARMZ-R7 application, or ADA4895-2ARMZ-R7 equivalent, key selection criteria include its gain ≥ 10 stability, ultra-low 1/f noise (2 nV/√Hz at 10 Hz), disable functionality per channel, and guaranteed operation across −40°C to +125°C.

Technical Context

The ADA4895-2ARMZ-R7 employs Analog Devices' proprietary SiGe XFCB3 process to achieve simultaneous low noise and high speed while maintaining stability at gains ≥ +10. Its architecture features matched input transistors for low offset drift (0.15 µV/°C) and integrated bias current cancellation, enabling precision DC performance alongside wideband AC response.

Each amplifier includes independent disable pins (DISABLE1 and DISABLE2), allowing dynamic power management with 0.25 µs enable time and sub-6 µs disable time. The rail-to-rail output stage supports ±4.96 V swing into 1 kΩ on ±5 V supplies and drives capacitive loads up to 6 pF without instability.

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	236 MHz at G = +10 - supports full-power bandwidth for >100 MSPS ADC drivers with minimal gain peaking.
Slew Rate	943 V/µs - ensures faithful reproduction of fast transient signals such as pulse-shaped ultrasound echoes or DAC outputs.
Settling Time	22 ns to 0.1% - meets timing budgets for 16-bit+ successive-approximation ADCs requiring precise sampling windows.
Supply Range	3 V to 10 V single or split - accommodates both low-voltage portable instrumentation and high-dynamic-range industrial systems.
Quiescent Current	3 mA per amplifier - balances performance and power efficiency for battery-sensitive or thermally constrained designs.
Input Offset Voltage	±350 µV max - maintains DC accuracy in closed-loop configurations without requiring external trimming.

Pinout & Package

The ADA4895-2ARMZ-R7 is housed in a 10-lead MSOP package (3.0 mm × 3.0 mm × 1.0 mm), specified for operation from −40°C to +125°C. Thermal resistance θ_JA is 210°C/W on a standard 4-layer JEDEC board.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT1	Amplifier 1 output - rail-to-rail capable; drives ADC inputs or filters directly with low output impedance (<1 Ω at dc).
2	−IN1	Inverting input of Amp 1 - high-impedance node (10 MΩ common-mode); requires matched feedback network for optimal CMRR.
3	+IN1	Noninverting input of Amp 1 - same impedance profile as −IN1; used for unity-gain buffer or differential input configurations.
4	−VS	Negative supply rail - shared by both amplifiers; must be decoupled locally with 0.1 µF ceramic capacitor.
5	DISABLE1	Active-low enable control for Amp 1 - pulls to < +VS − 2 V to disable; reduces quiescent current to 0.1 mA.
6	DISABLE2	Active-low enable control for Amp 2 - independent of DISABLE1; enables channel-level power gating in multi-channel systems.
7	+IN2	Noninverting input of Amp 2 - electrically isolated from Amp 1 inputs; crosstalk to OUT1 is −120 dB at 1 MHz.
8	−IN2	Inverting input of Amp 2 - matched to −IN1; supports dual-signal paths with minimal inter-channel coupling.
9	OUT2	Amplifier 2 output - identical performance to OUT1; allows simultaneous processing of two analog channels.
10	+VS	Positive supply rail - shared by both amplifiers; supplies internal bias circuitry and output stage.

Key Features

Feature	Design Value
Gain ≥ +10 stability	Eliminates need for external compensation in high-gain, wideband applications such as photomultiplier preamplifiers.
Rail-to-rail output	Delivers full dynamic range across supply rails - e.g., ±4.96 V swing on ±5 V supplies - maximizing ADC utilization.
Independent disable pins	Enables per-channel power-down in multi-amplifier systems, reducing total system current without PCB layout changes.
Low 1/f noise (2 nV/√Hz @ 10 Hz)	Preserves signal integrity in low-frequency applications like sensor interfaces and PLL loop filters where flicker noise dominates.
High SFDR (−96 dBc @ 100 kHz)	Minimizes harmonic distortion in ADC driver roles, preserving ENOB in 16-bit+ converters operating at medium frequencies.

Applications

Ultrasound Signal Conditioning	High-Resolution ADC Driving
Use Scenario: Amplifying low-amplitude, high-frequency echo signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: Low-noise preamplifier and variable-gain stage before digitization, operating at 1–15 MHz bandwidth. Use Value: 1 nV/√Hz noise floor preserves weak echo fidelity; 236 MHz bandwidth supports harmonics up to 10 MHz without roll-off.	Use Scenario: Buffering and driving the analog input of 16-bit SAR ADCs (e.g., AD7985) in precision data loggers. IC Role / Device Role / Timing Role: High-speed, low-distortion driver ensuring full settling within ADC aperture time. Use Value: 22 ns 0.1% settling time meets timing requirements for 1 MSPS+ sampling; −96 dBc SFDR maintains ENOB > 15 bits.
PLL Loop Filter Amplifier	DAC Output Buffering
Use Scenario: Active filtering and amplification in the charge-pump output path of RF synthesizers (e.g., ADF4351-based PLLs). IC Role / Device Role / Timing Role: Low-drift, low-noise op-amp implementing second-order loop filter with programmable gain. Use Value: 0.15 µV/°C offset drift prevents loop tuning drift over temperature; 2 nV/√Hz 1/f noise minimizes phase jitter accumulation.	Use Scenario: Isolating and scaling output of high-speed DACs (e.g., AD9767) in arbitrary waveform generators. IC Role / Device Role / Timing Role: Rail-to-rail output buffer delivering full-scale DAC voltage to 50 Ω transmission lines or downstream circuitry. Use Value: 943 V/µs slew rate handles 100+ MHz DAC update rates; 6 pF capacitive load drive supports direct connection to coaxial cables.

Ultrasound Signal Conditioning

High-Resolution ADC Driving

Use Scenario: Amplifying low-amplitude, high-frequency echo signals from piezoelectric transducers in portable ultrasound machines.

IC Role / Device Role / Timing Role: Low-noise preamplifier and variable-gain stage before digitization, operating at 1–15 MHz bandwidth.

Use Value: 1 nV/√Hz noise floor preserves weak echo fidelity; 236 MHz bandwidth supports harmonics up to 10 MHz without roll-off.

Use Scenario: Buffering and driving the analog input of 16-bit SAR ADCs (e.g., AD7985) in precision data loggers.

IC Role / Device Role / Timing Role: High-speed, low-distortion driver ensuring full settling within ADC aperture time.

Use Value: 22 ns 0.1% settling time meets timing requirements for 1 MSPS+ sampling; −96 dBc SFDR maintains ENOB > 15 bits.

PLL Loop Filter Amplifier

DAC Output Buffering

Use Scenario: Active filtering and amplification in the charge-pump output path of RF synthesizers (e.g., ADF4351-based PLLs).

IC Role / Device Role / Timing Role: Low-drift, low-noise op-amp implementing second-order loop filter with programmable gain.

Use Value: 0.15 µV/°C offset drift prevents loop tuning drift over temperature; 2 nV/√Hz 1/f noise minimizes phase jitter accumulation.

Use Scenario: Isolating and scaling output of high-speed DACs (e.g., AD9767) in arbitrary waveform generators.

IC Role / Device Role / Timing Role: Rail-to-rail output buffer delivering full-scale DAC voltage to 50 Ω transmission lines or downstream circuitry.

Use Value: 943 V/µs slew rate handles 100+ MHz DAC update rates; 6 pF capacitive load drive supports direct connection to coaxial cables.

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
ADA4896-2	Same 1 nV/√Hz noise and 230 MHz bandwidth, but no disable function and higher 3.5 mA quiescent current.	Lacks per-channel shutdown - unsuitable for power-gated multi-channel systems requiring dynamic current control.	Select ADA4896-2 only if disable functionality is unnecessary and slightly higher power is acceptable.
AD8099	Lower 0.95 nV/√Hz noise but narrower 510 MHz GBW and no rail-to-rail output; requires ±5 V minimum supply.	Cannot drive near supply rails - limits dynamic range in low-voltage ADC interfaces; not suitable for 3 V single-supply systems.	Choose AD8099 only when ultimate voltage noise is critical and rail-to-rail output is not required.

Compared with ADA4896-2 and AD8099, the ADA4895-2ARMZ-R7 uniquely combines ultra-low noise, rail-to-rail output, per-channel disable, and 3 V operation - making it the only option supporting low-power, wide-dynamic-range, multi-channel precision signal chains.

Availability

ADA4895-2ARMZ-R7 is available at Aetrix Electronics and suitable for high-resolution data acquisition, medical imaging equipment, and test-and-measurement instrumentation requiring stable component supply, extended temperature support, and long-term production continuity.

Supply support for ADA4895-2ARMZ-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 ADA4895 family was designed specifically for demanding signal-chain applications where low noise, high speed, and precision DC performance must coexist - including ultrasound, high-speed data converters, and instrumentation-grade amplification.

FAQ

What is the minimum supply voltage required for stable operation of the ADA4895-2ARMZ-R7?

The ADA4895-2ARMZ-R7 operates reliably from a total supply range of 3 V to 10 V - meaning it supports single-supply operation down to +3 V (with −VS grounded) or split supplies as low as ±1.5 V. At ±1.5 V, it retains 205 MHz −3 dB bandwidth and 20 ns settling time, verified across −40°C to +125°C.

Does the ADA4895-2ARMZ-R7 support unity-gain stable operation?

No, the ADA4895-2ARMZ-R7 is explicitly gain ≥ +10 stable. Attempting unity-gain (G = +1) or inverting configurations with |G| < 10 will cause peaking or oscillation. For G < +10 applications, external compensation (e.g., feedback capacitor) is required per the datasheet's Application Information section.

How does the disable feature affect power consumption in the ADA4895-2ARMZ-R7?

When either DISABLE1 or DISABLE2 is pulled below +VS − 2 V, the corresponding amplifier's quiescent current drops from 3 mA to 0.1 mA (at ±5 V) or 0.03 mA (at ±1.5 V). Both channels disabled reduce total device current to ~0.2 mA, enabling significant power savings in idle or standby modes without compromising startup latency.

Can the ADA4895-2ARMZ-R7 drive a 50 Ω load directly?

Yes - the ADA4895-2ARMZ-R7 delivers ±4.5 V output swing into 100 Ω (at ±5 V supplies) and sustains linear output current up to 80 mA rms. While not rated for continuous 50 Ω termination, it can drive 50 Ω loads for short-duration pulses or AC-coupled signals with proper thermal design and output series resistance to limit peak current.

What is the maximum capacitive load the ADA4895-2ARMZ-R7 can drive without compensation?

The ADA4895-2ARMZ-R7 remains stable driving up to 6 pF of capacitive load with ≤30% overshoot in unity-gain follower configuration. Beyond 6 pF, phase margin degrades - requiring isolation resistor (e.g., 10–50 Ω) between output and load or feedback capacitor compensation per Figure 54 in the datasheet.

ADA4895-2ARMZ-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:: 943V/µs

Gain Bandwidth Product:: 1.5 GHz

-3db Bandwidth:: 236 MHz

Current - Input Bias:: 11 µA

Voltage - Input Offset:: 53 µV

Current - Supply:: 3mA (x2 Channels)

Current - Output / Channel:: 116 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

ADA4895-2ARMZ-R7 FAQ

1.How can I place an order for ADA4895-2ARMZ-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4895-2ARMZ-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 ADA4895-2ARMZ-R7 reliable?

The price and inventory of ADA4895-2ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4895-2ARMZ-R7 is usually 5 days.

3.What payment methods are accepted for ADA4895-2ARMZ-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4895-2ARMZ-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4895-2ARMZ-R7?

ADA4895-2ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4895-2ARMZ-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 ADA4895-2ARMZ-R7?

For technical support, including ADA4895-2ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4895-2ARMZ-R7 requirements.

6.How does Aetrix verify that ADA4895-2ARMZ-R7 is sourced from the original manufacturer or authorized distributors?

All ADA4895-2ARMZ-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 ADA4895-2ARMZ-R7 meets industry standards.

7.What is the process for return or replacement of ADA4895-2ARMZ-R7?

All ADA4895-2ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4895-2ARMZ-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 ADA4895-2ARMZ-R7 part is unused and in its original packaging.

Return procedure for ADA4895-2ARMZ-R7:

1.Submit a request within 90 days.

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

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