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Analog Devices Inc. AD8038ARZ
- Part No.:
- AD8038ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8038ARZ.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,049
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Product details
Overview
AD8038ARZ from Analog Devices is a single-channel, 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, operating from ±5 V or single 5 V supply. It serves as an A/D driver, active video filter, or precision buffer in battery-powered instrumentation.
For engineers reviewing the AD8038ARZ datasheet, AD8038ARZ pinout, AD8038ARZ application, or AD8038ARZ equivalent, key selection considerations include its disable feature (available only in SOIC-8), 8-lead SOIC package with NC pins, rail-to-rail input common-mode range (±4 V), and verified capacitive load drive up to 20 pF without external compensation.
Technical Context
The AD8038ARZ employs Analog Devices' proprietary XFCB process to achieve low noise (8 nV/√Hz, 600 fA/√Hz) and high speed at 1 mA supply current. Its voltage-feedback architecture enables stable operation with noise gains ≥ +1 and supports wide supply range (3 V to 12 V).
It features a dedicated DISABLE pin (Pin 8) enabling power-down mode with 0.2 mA quiescent current and −60 dB input-output isolation at 1 MHz. Input common-mode range extends to within 1 V of either rail, and output swings to within 1 V of rails under 2 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 350 MHz at G = +1 (±5 V, 0.5 V p-p); enables baseband video and ADC sampling up to 100 MSPS |
| Slew Rate | 425 V/μs (±5 V); supports fast transient response for pulse and video signals |
| Input Voltage Noise | 8 nV/√Hz @ 100 kHz; preserves SNR in low-level signal conditioning paths |
| Quiescent Current | 1.0 mA typical per amplifier; reduces thermal load and extends battery life in portable systems |
| Capacitive Load Drive | 20 pF with ≤30% overshoot (G = +2); eliminates need for series output resistor in most PCB layouts |
| Disable Function | Turn-off time 700 ns, disabled IQ = 0.2 mA; enables dynamic power gating in multi-stage signal chains |
| Input Common-Mode Range | ±4 V (±5 V supply); accommodates wide-swing sensor outputs and level-shifting interfaces |
Pinout & Package
AD8038ARZ is packaged in an 8-lead SOIC (R) with exposed pad not electrically connected. Pin 1 and Pin 5 are no-connect (NC); Pin 8 is the DISABLE control input. The package meets JEDEC MS-012 standards and supports industrial temperature operation (−40°C to +85°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection; must be left floating or tied to ground per layout best practice |
| 2 | −IN | Inverting input; high-impedance node (10 MΩ) sensitive to parasitic capacitance |
| 3 | +IN | Noninverting input; same impedance and noise sensitivity as −IN |
| 4 | −VS | Negative supply rail; requires local 0.01 µF bypass capacitor to ground |
| 5 | NC | No internal connection; must be left floating or tied to ground |
| 6 | VOUT | Amplifier output; capable of driving 2 kΩ loads and 20 pF capacitance directly |
| 7 | +VS | Positive supply rail; requires local 0.01 µF bypass capacitor to ground |
| 8 | DISABLE | Digital enable/disable control; logic-low (< VS − 4.5 V) disables amplifier and reduces IQ to 0.2 mA |
Key Features
| Feature | Design Value |
|---|---|
| Low-power high-speed amplification | 350 MHz bandwidth at only 1 mA supply current-enables high-fidelity signal chain design without thermal compromise |
| Integrated power-down control | Hardware-disable pin reduces quiescent current by 80% (1.0 mA → 0.2 mA) with sub-µs switching |
| Wide supply voltage range | Operates from 3 V to 12 V single-ended or ±1.5 V to ±6 V dual supplies-supports legacy and low-voltage systems |
| Robust capacitive load drive | Stable with up to 20 pF load at G = +2-eliminates need for output isolation resistors in most PCB routing scenarios |
| Low distortion at high frequency | −90 dBc SFDR @ 1 MHz (2 V p-p)-meets requirements for 10-bit ADC drivers and composite video filtering |
Applications
| Battery-Powered Instrumentation | A/D Converter Driver |
|---|---|
Use Scenario: Portable oscilloscope front-end amplifying microvolt-level sensor signals with real-time display. IC Role / Device Role / Timing Role: Single-supply buffer and gain stage preceding 10-bit, 40 MSPS ADC (e.g., AD9203), providing dc-coupled differential drive. Use Value: 1 mA IQ extends battery runtime; 350 MHz bandwidth preserves rise time of fast transients; disable pin enables sleep-mode power gating between acquisitions. |
Use Scenario: Driving the analog inputs of a low-power 10-bit ADC in a handheld data logger. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with matched gain (+2 and −1) and midsupply output bias (2.5 V). Use Value: −90 dBc SFDR at 1 MHz ensures >9.5 ENOB; rail-to-rail input range accepts full-scale sensor outputs; 425 V/μs slew rate supports <20 ns settling to 0.1%. |
| Active Video Filter | Level-Shifting Interface |
Use Scenario: Removing clock feedthrough artifacts from digital-derived composite video signals in security camera modules. IC Role / Device Role / Timing Role: Three-pole Sallen-Key low-pass filter (fc ≈ 5 MHz) using ±2.5 V supplies to preserve black-level accuracy. Use Value: 8 nV/√Hz input noise prevents degradation of video SNR; 20 pF load tolerance simplifies filter capacitor placement; 1/5 power vs. legacy op amps reduces board heating. |
Use Scenario: Translating 0–3.3 V logic-level sensor output to ±2.5 V range for analog processing in mixed-signal SoC test fixtures. IC Role / Device Role / Timing Role: Precision level shifter with offset-controlled output swing and minimal propagation delay. Use Value: Input offset voltage ≤3 mV ensures <0.1% level-shift error; 425 V/μs slew rate maintains timing integrity for 10 MHz square waves; ±4 V input CMR accommodates full 3.3 V swing. |
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 |
|---|---|---|---|
| AD8057ARTZ-REEL7 | Single 325 MHz amplifier, 1.4 mA IQ, no disable pin, SC70-5 package | Lacks hardware disable; smaller footprint but no power-gating capability | Select when board space is critical and dynamic power control is unnecessary |
| LMH6629MA/NOPB | Single 720 MHz amplifier, 12.5 mA IQ, no disable, SOIC-8, higher noise (1.9 nV/√Hz) | Higher bandwidth and noise; unsuitable for battery operation due to 12× higher IQ | Select only when >500 MHz bandwidth is mandatory and power budget allows |
Compared with AD8038ARZ, AD8057ARTZ-REEL7 trades disable functionality for smaller size and slightly lower bandwidth, while LMH6629MA/NOPB offers significantly higher speed at prohibitive power cost-making AD8038ARZ the optimal balance of speed, power, and controllability for portable and instrumentation designs.
Availability
AD8038ARZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, A/D converter driver circuits, active video filtering, and level-shifting interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AD8038ARZ 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 AD8038ARZ belongs to Analog Devices' low-power, high-speed voltage-feedback op amp product line, designed specifically for portable test equipment, medical sensors, and imaging systems where bandwidth, power efficiency, and small packaging are jointly constrained.
FAQ
What is the function of Pin 8 (DISABLE) on the AD8038ARZ?
Pin 8 is the hardware disable control input. When pulled below (VS − 4.5 V), the AD8038ARZ enters low-power shutdown mode, reducing quiescent current from 1.0 mA to 0.2 mA and isolating input from output by −60 dB at 1 MHz. To re-enable, apply voltage > (VS − 2.5 V). This feature is exclusive to the AD8038ARZ SOIC-8 variant and is not present in SC70 or SOT-23 versions.
Can the AD8038ARZ drive a 50 Ω load directly?
The AD8038ARZ is not specified for continuous 50 Ω driving: its DC output voltage swing is ±4 V into 2 kΩ, and large-signal bandwidth drops sharply below 100 MHz at 50 Ω. For 50 Ω transmission lines, use a series 49.9 Ω resistor at the output to match impedance while preserving stability-verified in Figure 29 and Figure 30 of the AD8038/AD8039 Rev. G datasheet.
Does the AD8038ARZ support single-supply operation?
Yes, the AD8038ARZ operates from a single 3 V to 12 V supply. With 5 V supply, input common-mode range is 1.0 V to 4.0 V and output swing is 0.9 V to 4.1 V into 2 kΩ. For rail-to-rail input/output performance, external biasing (e.g., mid-supply reference to +IN) is required-confirmed in Table 2 and General Description section of the datasheet.
What is the maximum capacitive load the AD8038ARZ can drive without peaking?
The AD8038ARZ drives up to 20 pF with ≤30% overshoot at noise gain +2 (Table 1, "Capacitive Load Drive"). Beyond 20 pF, a small series resistor (e.g., 10–22 Ω) at the output is required to maintain stability-documented in Applications Information and Figures 12–13. This limit applies regardless of gain configuration and is validated across −40°C to +85°C.
How does the AD8038ARZ compare to the dual-channel AD8039 in terms of disable functionality?
The AD8038ARZ is the only variant with a dedicated DISABLE pin; the AD8039 dual amplifier does not include disable capability in any package (SOIC-8 or SOT-23-8). This makes AD8038ARZ uniquely suited for applications requiring per-amplifier power gating, whereas AD8039 is optimized for compact dual-channel signal paths without dynamic power control.
AD8038ARZ 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:
- -
- Slew Rate:
- 425V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 350 MHz
- Current - Input Bias:
- 400 nA
- 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
AD8038ARZ FAQ
1.How can I place an order for AD8038ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8038ARZ 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 AD8038ARZ reliable?
The price and inventory of AD8038ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8038ARZ is usually 5 days.
3.What payment methods are accepted for AD8038ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8038ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8038ARZ?
AD8038ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8038ARZ 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 AD8038ARZ?
For technical support, including AD8038ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8038ARZ requirements.
6.How does Aetrix verify that AD8038ARZ is sourced from the original manufacturer or authorized distributors?
All AD8038ARZ 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 AD8038ARZ meets industry standards.
7.What is the process for return or replacement of AD8038ARZ?
All AD8038ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8038ARZ, 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 AD8038ARZ part is unused and in its original packaging.
Return procedure for AD8038ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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