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Analog Devices Inc. AD8139ARDZ-REEL7
- Part No.:
- AD8139ARDZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AD8139ARDZ-REEL7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,436
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Product details
Overview
AD8139ARDZ-REEL7 from Analog Devices is a rail-to-rail, low-noise, high-speed differential amplifier optimized as an ADC driver for 18-bit converters. It delivers 410 MHz small-signal bandwidth (G = 1), 800 V/µs slew rate, 45 ns settling to 0.01%, and 2.25 nV/√Hz input voltage noise - enabling high-fidelity signal conditioning in precision data acquisition systems.
For engineers reviewing the AD8139ARDZ-REEL7 datasheet, AD8139ARDZ-REEL7 pinout, AD8139ARDZ-REEL7 application, or AD8139ARDZ-REEL7 equivalent, key selection criteria include output balance error (−69 dB at 1 MHz), adjustable VOCM control, rail-to-rail output swing, and compatibility with ±5 V or single 5 V supplies in demanding mixed-signal front-ends.
Technical Context
The AD8139ARDZ-REEL7 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 range. Its H-bridge input stage and rail-to-rail output architecture support both single-ended-to-differential and differential-to-differential configurations using only four external resistors.
It achieves exceptional harmonic suppression via inherent even-order distortion cancellation from balanced internal feedback paths, delivering 98 dBc SFDR at 1 MHz and maintaining >72 dBc up to 20 MHz - critical for driving high-resolution SAR and sigma-delta ADCs without degrading ENOB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal BW (G = 1) | 410 MHz - supports wideband IF sampling and high-speed digitization up to ~150 MSPS with adequate phase margin. |
| Slew Rate | 800 V/µs - ensures faithful reproduction of fast transient signals without slewing-induced distortion. |
| Settling Time (0.01%) | 45 ns - enables accurate sampling of multi-cycle waveforms in time-interleaved or pipelined ADC architectures. |
| Input Voltage Noise | 2.25 nV/√Hz - minimizes added noise floor when driving 18-bit ADCs with ≥90 dB SNR requirements. |
| Output Balance Error | −69 dB at 1 MHz - maintains amplitude and phase symmetry between +OUT and −OUT, preserving CMRR in downstream differential receivers. |
| Adjustable VOCM Range | −3.8 V to +3.8 V - allows direct interface to ADC reference voltages (e.g., 2.5 V or 1.25 V) without level-shifting circuitry. |
| Supply Range | ±5 V or +5 V only - dual-supply operation supports bipolar input signals; single-supply mode simplifies power design in embedded systems. |
Pinout & Package
The AD8139ARDZ-REEL7 is housed in an 8-lead SOIC package with exposed paddle (EP), thermally enhanced for industrial temperature operation (−40°C to +125°C). The EP must be soldered to PCB ground or power plane for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting Input | One input node of differential pair; used with +IN to define differential gain and common-mode rejection path. |
| 2 (VOCM) | Output Common-Mode Control | Directly sets average voltage of +OUT/−OUT outputs; enables seamless interfacing to ADC input common-mode requirements. |
| 3 (V+) | Positive Supply | Accepts +5 V (single supply) or +5 V (dual supply); decoupling capacitor required within 1 cm. |
| 4 (+OUT) | Positive Differential Output | Delivers inverted or noninverted signal depending on configuration; rail-to-rail swing supports full ADC dynamic range. |
| 5 (−OUT) | Negative Differential Output | Complementary output to +OUT; matched impedance and timing ensure <1 ps skew in high-frequency applications. |
| 6 (V−) | Negative Supply | Required for dual-supply operation (−5 V); left open or tied to ground only if configured for single-supply use per datasheet guidelines. |
| 7 (NIC) | No Internal Connection | Unbonded die pad; must remain unconnected and may be floated or grounded for mechanical stability (no electrical function). |
| 8 (+IN) | Noninverting Input | Second input node; combined with −IN forms fully differential input stage with 600 kΩ differential resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Enables true differential signaling with intrinsic rejection of even-order harmonics and common-mode interference. |
| Rail-to-rail output swing | Delivers >99% of supply rails (e.g., −4.8 V to +4.8 V @ ±5 V), maximizing ADC utilization and dynamic range. |
| Internal VOCM feedback loop | Eliminates need for external op amp buffers to set output common-mode; reduces component count and layout sensitivity. |
| Low input bias current mismatch | 0.5 µA max input offset current ensures minimal gain error from resistor network imbalances in precision gain-setting networks. |
| High DC CMRR | 80 dB minimum suppresses supply noise and board-level coupling from appearing as differential error at outputs. |
Applications
| ADC Driver for 18-Bit SAR Converters | Single-Ended to Differential Conversion |
|---|---|
Use Scenario: Driving AD7674 or similar 18-bit, 800 kSPS SAR ADC in precision instrumentation. IC Role / Device Role / Timing Role: Front-end signal conditioner that converts sensor-level analog signals into balanced differential format while preserving SNR and THD. Use Value: 98 dBc SFDR at 1 MHz ensures no spurious tones mask low-level signals, directly supporting >17.5 ENOB in final digitized output. | Use Scenario: Converting single-ended LVDS or microcontroller DAC outputs to differential format for noise-immune transmission over PCB traces. IC Role / Device Role / Timing Role: Level-shifting, impedance-matching, and common-mode translation block with sub-50 ns settling. Use Value: Adjustable VOCM pin allows direct matching to receiver's input common-mode specification (e.g., 1.25 V for LVDS-compatible receivers), eliminating discrete bias networks. |
| Differential Filter Interface | High-Speed Differential Cable Driver |
Use Scenario: Buffering passive or active differential filters (e.g., 2nd-order Chebyshev) before ADC input in RF receiver chains. IC Role / Device Role / Timing Role: Low-output-impedance driver that isolates filter response from ADC loading effects and maintains group delay flatness. Use Value: 410 MHz bandwidth and 800 V/µs slew rate preserve filter passband integrity up to 100 MHz without peaking or attenuation. | Use Scenario: Driving 100 Ω differential PCB traces or short coaxial cables (<30 cm) in automated test equipment or medical imaging front-ends. IC Role / Device Role / Timing Role: High-current, low-distortion line driver with matched +OUT/−OUT output impedances and controlled edge rates. Use Value: 100 mA per output and −69 dB balance error minimize inter-symbol interference and jitter accumulation over differential interconnects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential ADC driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IRGET | Lower noise (1.6 nV/√Hz), lower bandwidth (1.8 GHz GBW but 320 MHz small-signal BW), higher quiescent current (32 mA). | Better suited for ultra-low-noise, lower-frequency (<50 MHz) precision applications; less ideal for >100 MSPS sampling due to lower slew rate (500 V/µs). | Select THS4561IRGET when optimizing for lowest possible integrated noise in DC-coupled sensor interfaces below 20 MHz. |
| ADA4941-1ARZ | Lower bandwidth (55 MHz), lower slew rate (55 V/µs), rail-to-rail input, lower power (10.5 mA), integrated feedback resistors available. | Targeted at lower-speed, low-power applications (e.g., battery-powered data loggers); lacks speed and drive capability for high-resolution, high-speed ADCs. | Select ADA4941-1ARZ for cost-sensitive, low-bandwidth (<10 MHz) designs where power efficiency and simplicity outweigh raw performance. |
Compared with THS4561IRGET and ADA4941-1ARZ, the AD8139ARDZ-REEL7 uniquely balances ultralow noise, high slew rate, and wide bandwidth - making it the preferred choice for 18-bit ADC drivers operating above 50 MSPS where both fidelity and speed are critical.
Availability
AD8139ARDZ-REEL7 is available at Aetrix Electronics and suitable for precision data acquisition, high-speed test instrumentation, medical imaging front-ends, and industrial process control systems requiring stable component supply across extended temperature ranges.
Supply support for AD8139ARDZ-REEL7 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 AD8139ARDZ-REEL7 belongs to Analog Devices' precision high-speed amplifier product line, engineered specifically for high-fidelity signal conditioning in data converter interfaces where noise, distortion, and timing accuracy are paramount.
FAQ
What is the maximum operating temperature for the AD8139ARDZ-REEL7?
The AD8139ARDZ-REEL7 is rated for continuous operation from −40°C to +125°C ambient temperature. This extended industrial temperature range is enabled by its SOIC-8 EP package and robust XFCB process design, making it suitable for harsh environments such as motor control enclosures or outdoor instrumentation housings. Thermal derating must follow the θJA = 70°C/W specification under actual board layout conditions.
Can the AD8139ARDZ-REEL7 operate from a single +5 V supply?
Yes, the AD8139ARDZ-REEL7 supports single-supply operation at +5 V, with VOCM biased at 2.5 V to center the rail-to-rail outputs. In this configuration, the input common-mode range is 1 V to 4 V, and typical specifications include 385 MHz small-signal bandwidth and 540 V/µs slew rate. The V− pin must be tied to ground, and proper decoupling is essential to maintain PSRR performance.
How does the VOCM pin affect output balance in the AD8139ARDZ-REEL7?
The VOCM pin directly controls the output common-mode voltage without degrading output balance - the internal feedback loop maintains −69 dB balance error at 1 MHz regardless of VOCM setting. This independence allows designers to shift output DC levels (e.g., to match ADC reference voltages) while preserving differential signal integrity, unlike amplifiers requiring external common-mode buffers that introduce imbalance.
What is the recommended layout practice for minimizing noise in AD8139ARDZ-REEL7 circuits?
For optimal noise performance, the AD8139ARDZ-REEL7 requires a solid ground plane beneath the SOIC-8 EP package, localized 0.1 µF ceramic decoupling capacitors within 3 mm of each supply pin, and symmetric routing of +IN/−IN and +OUT/−OUT traces with matched lengths and impedances. Avoid routing sensitive inputs near digital clocks or switching regulators, and connect the EP paddle directly to the ground plane using multiple thermal vias.
Does the AD8139ARDZ-REEL7 require external gain-setting resistors?
Yes, the AD8139ARDZ-REEL7 uses external resistor networks (RF and RG) to set closed-loop gain in both differential and single-ended-to-differential configurations. Typical values are 200 Ω for RG and RF at G = 1, providing 400 MHz bandwidth and 5.8 nV/√Hz total output noise. Resistor matching (≤0.1%) is recommended for best CMRR and gain accuracy, though the internal VOCM loop relaxes tolerance requirements on absolute resistor values.
AD8139ARDZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD8139ARDZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8139ARDZ-REEL7 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-REEL7 reliable?
The price and inventory of AD8139ARDZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8139ARDZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8139ARDZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8139ARDZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8139ARDZ-REEL7?
AD8139ARDZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8139ARDZ-REEL7 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-REEL7?
For technical support, including AD8139ARDZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8139ARDZ-REEL7 requirements.
6.How does Aetrix verify that AD8139ARDZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8139ARDZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8139ARDZ-REEL7?
All AD8139ARDZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8139ARDZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for AD8139ARDZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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