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Analog Devices Inc. AD8139ARDZ-REEL
- Part No.:
- AD8139ARDZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AD8139ARDZ-REEL.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,296
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Product details
Overview
AD8139ARDZ-REEL from Analog Devices is a rail-to-rail, low-noise, high-speed differential amplifier optimized as an ADC driver for 16–18-bit converters. It delivers 410 MHz small-signal bandwidth (G = 1), 800 V/µs slew rate, 2.25 nV/√Hz input voltage noise, and 98 dBc SFDR at 1 MHz - enabling precision signal conditioning in high-resolution data acquisition systems.
For engineers reviewing the AD8139ARDZ-REEL datasheet, AD8139ARDZ-REEL pinout, AD8139ARDZ-REEL application, or AD8139ARDZ-REEL equivalent, key selection criteria include output balance error (−69 dB at 1 MHz), adjustable VOCM control, rail-to-rail output swing, and dual-supply (±5 V) or single-supply (5 V) operation with 22–25.5 mA quiescent current.
Technical Context
The AD8139ARDZ-REEL employs an internal common-mode feedback loop that forces output common-mode voltage (VO,cm) to track the VOCM pin voltage, enabling precise dc-level control independent of input common-mode voltage. Its H-bridge input stage and rail-to-rail output architecture support both differential-to-differential and single-ended-to-differential configurations using only four external resistors.
This architecture delivers exceptional output balance (−69 dB at 1 MHz) and suppresses even-order harmonic distortion without requiring matched external components. The device operates across −40°C to +125°C and supports wide supply ranges (±4.5 V to ±6 V or +4.5 V to +12 V), with thermal resistance θJA = 70°C/W in both SOIC-EP and LFCSP packages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (G = 1) | 410 MHz - supports >100 MSPS sampling with minimal gain roll-off in ADC front-end designs. |
| Slew rate | 800 V/µs - ensures fast settling (45 ns to 0.01%) for high-fidelity transient response in wideband applications. |
| Input voltage noise | 2.25 nV/√Hz - preserves SNR in high-resolution (≥16-bit) ADC signal chains, especially below 10 MHz. |
| Output balance error | −69 dB at 1 MHz - minimizes even-order distortion and maintains CMRR integrity in differential receiver paths. |
| DC CMRR | 80 dB - rejects common-mode interference at baseband, critical for sensor and instrumentation amplification. |
| VOCM bandwidth | 515 MHz - allows high-speed modulation or dynamic level shifting of output common-mode without lag. |
| Quiescent current | 25.5 mA max - balances performance and power in thermally constrained industrial or portable DAQ systems. |
Pinout & Package
The AD8139ARDZ-REEL is supplied in an 8-lead SOIC package with exposed paddle (EP), rated for −40°C to +125°C operation. The exposed paddle must be soldered to ground or power plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting input | One summing junction for differential or single-ended input; linear range extends to within ~1 V of rails. |
| 2 (VOCM) | Output common-mode control | Directly sets VO,cm via internal feedback loop; supports dynamic level shifting and biasing flexibility. |
| 3 (V+) | Positive supply | Accepts +4.5 V to +12 V (single-supply) or ±4.5 V to ±6 V (dual-supply); PSRR ≥95 dB. |
| 4 (+OUT) | Positive differential output | Delivers rail-to-rail swing (−VS + 0.15 V to +VS − 0.15 V); balanced against −OUT for true differential signaling. |
| 5 (−OUT) | Negative differential output | Complementary output to +OUT; output balance error <−69 dB enables clean 18-bit ADC interface. |
| 6 (V−) | Negative supply | Required for dual-supply operation; supports symmetric ±5 V or asymmetric supplies down to −4.5 V. |
| 7 (NIC) | No internal connection | Unbonded pin; must remain unconnected and not tied to any net to avoid parasitic coupling. |
| 8 (+IN) | Noninverting input | Second summing junction; matched with −IN for high CMRR and low offset drift (1.25 µV/°C). |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Enables true differential signaling with inherent rejection of even-order harmonics and common-mode noise. |
| Adjustable VOCM control | Allows output common-mode voltage to be set independently of input, simplifying interface to ADCs with fixed reference levels. |
| Rail-to-rail output swing | Maximizes dynamic range into ADC inputs (e.g., AD7674, AD7980), preserving full-scale resolution without clipping. |
| Low 2.25 nV/√Hz input noise | Minimizes degradation of system SNR in high-gain, wideband stages preceding 16–18-bit SAR or sigma-delta ADCs. |
| High 98 dBc SFDR @ 1 MHz | Ensures clean spectral purity for demanding applications like medical imaging, spectrum analyzers, and communications test equipment. |
Applications
| ADC Driver for 18-Bit SAR Converters | Single-Ended-to-Differential Signal Conversion |
|---|---|
|
Use Scenario: Driving the AD7674 (18-bit, 800 kSPS) in a precision data logger with ±5 V analog inputs. IC Role / Device Role / Timing Role: Differential ADC driver providing matched gain, phase, and offset between +OUT/−OUT to maximize ENOB. Use Value: 98 dBc SFDR at 1 MHz and −69 dB output balance preserve >17.5 ENOB; VOCM pin enables direct interface to ADC's 2.5 V reference. |
Use Scenario: Converting a single-ended 0–5 V sensor output to differential ±2.5 V for noise-immune transmission over PCB traces. IC Role / Device Role / Timing Role: Single-ended-to-differential converter with programmable output common-mode set by VOCM. Use Value: Rail-to-rail output swing and 800 V/µs slew rate ensure accurate reproduction of fast transients; no external level-shifting circuitry required. |
| Differential Cable Driver | Differential Filter Interface Stage |
|
Use Scenario: Transmitting high-fidelity audio or instrumentation signals over 1–3 m twisted-pair cables to remote ADCs. IC Role / Device Role / Timing Role: High-output-current (100 mA per output) differential line driver with low output impedance. Use Value: 410 MHz bandwidth and 45 ns settling time maintain signal integrity up to 10 MHz; robust drive capability reduces need for external buffers. |
Use Scenario: Feeding a passive LC differential anti-alias filter before a high-speed ADC in a radar receiver front-end. IC Role / Device Role / Timing Role: Low-output-impedance, low-noise buffer isolating filter from ADC input capacitance. Use Value: 2.25 nV/√Hz noise floor prevents filter-induced SNR degradation; 80 dB dc CMRR rejects ground-loop artifacts in mixed-signal systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential ADC driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IDR | Lower noise (1.6 nV/√Hz), lower BW (1.8 GHz GBW but 320 MHz small-signal BW), higher quiescent current (32 mA). | Better for ultra-low-noise, lower-frequency (<50 MHz) precision applications; less suitable for >100 MSPS sampling. | Choose THS4561IDR when sub-2 nV/√Hz noise dominates over bandwidth and power constraints. |
| ADA4941-1ARMZ | Lower bandwidth (55 MHz), lower slew rate (55 V/µs), rail-to-rail input/output, lower quiescent current (10.5 mA). | Optimized for low-power, DC-coupled, medium-speed (≤10 MSPS) applications; lacks VOCM control. | Choose ADA4941-1ARMZ for battery-powered or thermally limited systems where 55 MHz BW suffices. |
Compared with THS4561IDR and ADA4941-1ARMZ, the AD8139ARDZ-REEL uniquely balances ultralow noise (2.25 nV/√Hz), wide bandwidth (410 MHz), VOCM adjustability, and rail-to-rail output - making it the preferred choice for 16–18-bit, >50 MSPS ADC driving where dynamic range and settling fidelity are critical.
Availability
AD8139ARDZ-REEL is available at Aetrix Electronics and suitable for high-resolution data acquisition, test & measurement instrumentation, and industrial process control requiring stable component supply and long-term manufacturability.
Supply support for AD8139ARDZ-REEL 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 Wilmington, MA.
The AD8139 belongs to Analog Devices' precision high-speed amplifier product line, engineered specifically for demanding ADC interface, differential signal conditioning, and wideband instrumentation applications.
FAQ
What is the maximum operating temperature for the AD8139ARDZ-REEL?
The AD8139ARDZ-REEL is rated for continuous operation from −40°C to +125°C ambient temperature. This extended range is validated across all electrical specifications in the datasheet and supports deployment in harsh industrial, automotive under-hood, and aerospace environments where thermal stability is critical. The SOIC-EP package's 70°C/W thermal resistance enables reliable operation within this range when properly mounted to a grounded copper plane.
Does the AD8139ARDZ-REEL support single-supply operation?
Yes, the AD8139ARDZ-REEL supports true single-supply operation from +4.5 V to +12 V. When operated at +5 V with VOCM = 2.5 V, it delivers rail-to-rail output swing (−0.15 V to +4.85 V per output), 385 MHz small-signal bandwidth, and 99 dBc SFDR at 1 MHz. Input common-mode range is 1 V to 4 V under these conditions, enabling direct interfacing with microcontroller DACs or sensor outputs referenced to midsupply.
How does the VOCM pin function in the AD8139ARDZ-REEL?
The VOCM pin on the AD8139ARDZ-REEL controls the output common-mode voltage (VO,cm) via an internal feedback loop that forces (VOP + VON)/2 to equal the applied VOCM voltage. This allows independent setting of output dc level regardless of input common-mode voltage - essential for matching ADC reference voltages (e.g., 2.5 V or 1.25 V). The VOCM input has 3.5 MΩ resistance and 3.5 nV/√Hz noise, supporting both dc biasing and ac-coupled modulation.
What is the recommended layout practice for the AD8139ARDZ-REEL?
For optimal performance, the AD8139ARDZ-REEL requires a solid ground plane, localized 0.1 µF ceramic decoupling capacitors placed within 2 mm of each supply pin (V+ and V−), and symmetric, matched trace routing for +IN/−IN and +OUT/−OUT pairs. The exposed paddle (EP) must be soldered to the ground plane with ≥4 thermal vias. Avoid routing noisy digital traces beneath the device, and keep feedback resistors (RF/RG) close to the pins to minimize parasitic inductance and capacitance.
Can the AD8139ARDZ-REEL drive capacitive loads directly?
The AD8139ARDZ-REEL can drive moderate capacitive loads (≤10 pF) directly, but larger loads (e.g., ADC input capacitance + PCB trace capacitance >15 pF) require series isolation resistors (typically 5–20 Ω per output) to prevent peaking and ringing. This is documented in Figure 58 and Figure 63 of the datasheet. Without isolation, capacitive loading degrades phase margin and increases settling time beyond the specified 45 ns - particularly critical in high-speed sampling systems.
AD8139ARDZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 800V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 410 MHz
- Current - Input Bias:
- 2.25 µA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 24.5mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
AD8139ARDZ-REEL FAQ
1.How can I place an order for AD8139ARDZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8139ARDZ-REEL 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 AD8139ARDZ-REEL reliable?
The price and inventory of AD8139ARDZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8139ARDZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8139ARDZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8139ARDZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8139ARDZ-REEL?
AD8139ARDZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8139ARDZ-REEL 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 AD8139ARDZ-REEL?
For technical support, including AD8139ARDZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8139ARDZ-REEL requirements.
6.How does Aetrix verify that AD8139ARDZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8139ARDZ-REEL 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 AD8139ARDZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8139ARDZ-REEL?
All AD8139ARDZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8139ARDZ-REEL, 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 AD8139ARDZ-REEL part is unused and in its original packaging.
Return procedure for AD8139ARDZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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