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Analog Devices Inc. AD8038AR
- Part No.:
- AD8038AR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8038AR.pdf
- Description:
- IC OPAMP VF LP LN LDIST 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:23,938
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Product details
Overview
AD8038AR from Analog Devices is a single, low-power, voltage-feedback operational amplifier optimized for high-speed, space-constrained applications. It delivers 350 MHz −3 dB bandwidth (G = +1), 425 V/μs slew rate, and 1.0 mA quiescent current per amplifier, enabling use as an A/D driver or active video filter in battery-powered instrumentation.
For engineers reviewing the AD8038AR datasheet, AD8038AR pinout, AD8038AR application, or AD8038AR equivalent, key selection criteria include its disable feature (available only in SOIC-8), 8 nV/√Hz input voltage noise at 100 kHz, ±4 V output swing on ±5 V supplies, and compatibility with capacitive loads up to 20 pF.
Technical Context
The AD8038AR employs Analog Devices' proprietary XFCB process to achieve low-noise operation (8 nV/√Hz, 600 fA/√Hz) while maintaining ultra-low quiescent current. Its voltage-feedback architecture supports stable gain configurations from +1 to +10, with bandwidth scaling inversely with noise gain.
It features rail-to-rail input common-mode range (within 1 V of either supply) and output swing to within 1 V of each rail. The integrated disable function reduces quiescent current to 0.2 mA and provides −60 dB input-output isolation at 1 MHz when activated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 350 MHz at G = +1 (±5 V, 0.5 V p-p): enables signal conditioning up to UHF frequencies without gain-dependent bandwidth collapse. |
| Slew Rate | 425 V/μs (±5 V, 2 V step): supports clean 100+ MSPS transient response in ADC driver applications. |
| Input Voltage Noise | 8 nV/√Hz @ 100 kHz: preserves SNR in precision signal chains where source impedance is <1 kΩ. |
| Quiescent Current | 1.0 mA per amplifier (typical): allows dual-channel operation under 2.5 mW total supply power at ±5 V. |
| Disable Function | Available only in SOIC-8 package; turns off amplifier with 700 ns turn-off time and 0.2 mA disabled current. |
| Capacitive Load Drive | Stable with up to 20 pF (30% overshoot, G = +2): eliminates need for external snubbing resistors in most video or filter buffer layouts. |
| Supply Range | 3 V to 12 V (single or dual): supports operation from Li-ion battery (3.3 V) to industrial ±5 V rails without redesign. |
Pinout & Package
AD8038AR is supplied in an 8-lead SOIC (R) package with exposed pad not electrically connected. Pin 1 is NC (no connect), Pin 4 is −VS, Pin 5 is NC, Pin 6 is VOUT, Pin 7 is +VS, Pin 8 is DISABLE - a logic-controlled shutdown input referenced to +VS.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Unbonded die pad; must be left floating or tied to ground for mechanical stability only. |
| 2 | Inverting Input (−IN) | Differential input node; accepts signals within 1 V of either supply rail. |
| 3 | Noninverting Input (+IN) | Differential input node; matched impedance and capacitance to −IN for CMRR optimization. |
| 4 | Negative Supply (−VS) | Power supply return for dual-supply operation; connects to ground in single-supply mode. |
| 5 | No Connect | Unbonded die pad; no electrical function; avoid routing signals nearby. |
| 6 | Output (VOUT) | Class-AB output stage capable of ±4 V swing into 2 kΩ on ±5 V supplies. |
| 7 | Positive Supply (+VS) | Main power input; supplies internal bias and output stage; requires local 0.01 µF bypass. |
| 8 | Disable Control | Active-high enable: device operates when voltage ≥ (+VS − 2.5 V); disables when ≤ (+VS − 4.5 V). |
Key Features
| Feature | Design Value |
|---|---|
| Low-power high-speed amplification | 350 MHz bandwidth with only 1.0 mA supply current enables portable RF front-end and imaging sensor interfaces. |
| Integrated power-down control | Hardware-disable pin reduces system idle power by 80%, critical for duty-cycled data acquisition systems. |
| Wide supply flexibility | Operates from 3 V to 12 V (single or dual), eliminating level-shifting needs across mixed-voltage subsystems. |
| Low distortion at high frequency | −90 dBc SFDR at 1 MHz ensures minimal harmonic contamination in ADC sampling clocks and video sync paths. |
| Robust capacitive load drive | Stable with 20 pF loads simplifies PCB layout for LCD interface buffers and anti-aliasing filter outputs. |
Applications
| Battery-Powered Instrumentation | A/D Converter Driver |
|---|---|
|
Use Scenario: Portable oscilloscope front-end amplifying sensor signals before digitization. IC Role / Device Role / Timing Role: Single-ended to differential driver with precise DC offset control and wide dynamic range. Use Value: 1.0 mA quiescent current extends battery life; 425 V/μs slew rate captures fast transients without slewing distortion. |
Use Scenario: Driving AD9203 10-bit, 40 MSPS ADC in low-power data loggers. IC Role / Device Role / Timing Role: Dual-op-amp configured single-ended-to-differential driver with matched ac response. Use Value: −90 dBc SFDR at 1 MHz preserves ENOB; disable function synchronizes with ADC sleep mode. |
| Active Video Filtering | Level Shifting & Buffering |
|
Use Scenario: Composite video post-processing to suppress clock feedthrough in embedded displays. IC Role / Device Role / Timing Role: Three-pole Sallen-Key low-pass filter stage operating on ±2.5 V supplies. Use Value: Consumes only 5 mW vs. 25–30 mW for legacy op amps-enables thermal-safe integration in compact enclosures. |
Use Scenario: Interfacing 3.3 V microcontroller GPIO to 5 V logic or analog subsystems. IC Role / Device Role / Timing Role: Unity-gain buffer with rail-to-rail input and output swing. Use Value: Input common-mode range extends to within 1 V of rails; output swings ±4 V on ±5 V supplies for full logic-level translation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher 1.5 GHz GBW but 12 mA quiescent current; no disable pin; SOIC-8 only. | Used in higher-bandwidth test equipment where power is secondary to speed. | Select LMH6629MA/NOPB only when >1 GHz small-signal bandwidth is required and board-level power budget permits 12× higher IQ. |
| ADA4891-1ARJZ-R7 | 220 MHz bandwidth, 1.2 mA IQ, SC70-5 package; no disable; lower noise (7 nV/√Hz) but reduced slew rate (170 V/μs). | Favored in cost-sensitive consumer audio preamps and low-frequency sensor buffers. | Choose ADA4891-1ARJZ-R7 for sub-200 MHz applications where SC70 size and lowest possible cost outweigh disable functionality. |
Compared with LMH6629MA/NOPB and ADA4891-1ARJZ-R7, AD8038AR uniquely balances 350 MHz bandwidth, 1 mA IQ, and hardware disable in SOIC-8 - making it optimal for battery-operated instrumentation requiring periodic signal acquisition bursts.
Availability
AD8038AR is available at Aetrix Electronics and suitable for battery-powered instrumentation, A/D converter driver circuits, and active video filtering requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for AD8038AR 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 AD8038AR belongs to Analog Devices' precision high-speed op amp product line, designed specifically for low-power, wide-bandwidth signal conditioning in portable and thermally constrained systems.
FAQ
What is the maximum capacitive load the AD8038AR can drive without instability?
The AD8038AR is specified to drive up to 20 pF capacitive loads with ≤30% overshoot at G = +2. For loads exceeding 20 pF, a series resistor (e.g., 10–50 Ω) placed directly at the VOUT pin restores stability without degrading small-signal bandwidth significantly. This behavior is verified in Figures 12–13 and 27–28 of the AD8038/AD8039 Rev. G datasheet.
Does the AD8038AR support single-supply operation?
Yes, the AD8038AR operates from a single 3 V to 12 V supply. Its input common-mode range extends from 1.0 V to 4.0 V (at VS = 5 V), and output swings from 0.9 V to 4.1 V into 2 kΩ - enabling rail-to-rail input and near-rail-to-rail output performance in single-supply configurations such as 3.3 V or 5 V systems.
What is the purpose of the DISABLE pin on the AD8038AR?
The DISABLE pin (Pin 8) provides hardware-controlled power-down: pulling it ≤ (+VS − 4.5 V) disables the amplifier, reducing quiescent current from 1.0 mA to 0.2 mA and isolating input from output by −60 dB at 1 MHz. This feature is exclusive to the AD8038AR SOIC-8 variant and is absent in SC70-5 versions.
How does the AD8038AR compare to the dual-channel AD8039 in terms of bandwidth and noise?
The AD8038AR and AD8039 share identical core specifications: both deliver 350 MHz −3 dB bandwidth (G = +1), 425 V/μs slew rate, 8 nV/√Hz input voltage noise, and 600 fA/√Hz input current noise. The AD8039 adds channel-to-channel crosstalk of −70 dB at 5 MHz but lacks the DISABLE pin found only on the AD8038AR SOIC-8 package.
Is the AD8038AR pin-compatible with other SOIC-8 op amps like the AD8065?
No, the AD8038AR is not pin-compatible with AD8065 or generic SOIC-8 op amps. Its pinout places DISABLE on Pin 8 and uses Pins 1 and 5 as NC - unlike standard SOIC-8 op amps that assign Pin 1 to offset null or shutdown and Pin 5 to V–. Layout reuse requires verification against Figure 1 (SOIC) in the AD8038/AD8039 Rev. G datasheet.
AD8038AR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 425V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 350 MHz
- Current - Input Bias:
- 400 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8038AR FAQ
1.How can I place an order for AD8038AR through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8038AR 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 AD8038AR reliable?
The price and inventory of AD8038AR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8038AR is usually 5 days.
3.What payment methods are accepted for AD8038AR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8038AR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8038AR?
AD8038AR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8038AR 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 AD8038AR?
For technical support, including AD8038AR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8038AR requirements.
6.How does Aetrix verify that AD8038AR is sourced from the original manufacturer or authorized distributors?
All AD8038AR 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 AD8038AR meets industry standards.
7.What is the process for return or replacement of AD8038AR?
All AD8038AR units undergo pre-shipment inspection (PSI). If there is an issue with AD8038AR, 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 AD8038AR part is unused and in its original packaging.
Return procedure for AD8038AR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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