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Analog Devices Inc. AD8131ARMZ
- Part No.:
- AD8131ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8131ARMZ.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:876
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Product details
Overview
AD8131ARMZ from Analog Devices is a high-speed, fixed-gain (G = 2) differential driver IC optimized for single-ended-to-differential signal conversion in video, ADC interface, and high-speed data transmission systems. It delivers 400 MHz −3 dB bandwidth, 2000 V/μs slew rate, and −60 dB output balance error at 10 MHz, enabling low-EMI transmission over Cat3/Cat5 twisted pair or coaxial cables in industrial and instrumentation applications.
For engineers reviewing the AD8131ARMZ datasheet, AD8131ARMZ pinout, AD8131ARMZ application, or AD8131ARMZ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated MSOP-8 pin functions, application-specific use cases, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The AD8131ARMZ employs dual internal feedback loops-one for differential-mode gain control (set by on-chip 1.5 kΩ/750 Ω resistor network) and one for common-mode output voltage regulation via VOCM pin-enabling independent control of output amplitude and DC level. Its XFCB bipolar process ensures stable operation from ±1.4 V to ±5.5 V supplies or +2.7 V to +11 V single supply.
This architecture eliminates external gain-setting components, achieves −62 dB to −70 dB output balance error across frequency, and supports fast overload recovery (5 ns) and 0.1% settling in 14–18 ns-critical for driving high-resolution, high-speed ADCs and preserving signal integrity in analog video line drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 400 MHz (large-signal, ±5 V supply): enables full HD video and >200 MSPS ADC driving without roll-off |
| Slew Rate | 2000 V/μs (±5 V supply): supports clean 2 Vp-p step response with minimal distortion |
| Output Balance Error | −60 dB @ 10 MHz: reduces common-mode EMI and preserves ADC SFDR performance |
| Fixed Differential Gain | 2.00 ±0.03 V/V (no external resistors): eliminates gain drift and matching errors in production |
| Common-Mode Output Control | VOCM pin sets output common-mode voltage 1:1 (e.g., 2.5 V input → 2.5 V common-mode output): simplifies level-shifting into single-supply ADCs |
| Harmonic Distortion | −95 dBc 3rd harmonic @ 5 MHz, 800 Ω load: meets broadcast-quality NTSC video requirements |
| Supply Range | +2.7 V to +11 V single supply or ±1.4 V to ±5.5 V dual supply: supports portable, industrial, and mixed-voltage systems |
Pinout & Package
The AD8131ARMZ is housed in an 8-lead MSOP package (3 mm × 3 mm, 0.65 mm pitch), specified for −40°C to +125°C operation. Pinout is identical to SOIC-8 but with reduced footprint and thermal resistance (θJA = 142°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: −DIN | Negative input terminal | Accepts inverted-phase input in differential mode; grounded in single-ended configuration to set input common-mode point |
| 2: VOCM | Common-mode output voltage control | DC voltage applied here directly sets the average of +OUT and −OUT; enables seamless interfacing with single-supply ADCs |
| 3: V+ | Positive supply rail | Supports +2.7 V to +11 V single supply or +5 V dual supply; decoupling required within 1 cm |
| 4: +OUT | Positive differential output | Inverts voltage at −DIN; drives one leg of balanced transmission line or ADC differential input |
| 5: −OUT | Negative differential output | Inverts voltage at +DIN; complements +OUT to deliver true differential swing with matched timing |
| 6: V− | Negative supply rail | Required for dual-supply operation (±1.4 V to ±5.5 V); tied to GND in single-supply mode |
| 7: NC | No connect | Internally unused; must remain unconnected per datasheet to avoid parasitic coupling |
| 8: +DIN | Positive input terminal | Primary input for single-ended signals; source impedance matched to 24.9 Ω for optimal gain accuracy and CMRR |
Key Features
| Feature | Design Value |
|---|---|
| On-chip precision resistor network | 1.5 kΩ/750 Ω ratio trimmed for <±0.3% gain accuracy and <−70 dB CMRR, eliminating external component variation |
| Independent common-mode feedback loop | Enables VOCM-controlled output bias without affecting differential gain or phase balance-critical for DC-coupled ADC interfaces |
| Low harmonic distortion | −95 dBc 3rd harmonic at 5 MHz (800 Ω load) ensures compliance with NTSC/PAL video standards and high-SFDR data acquisition |
| Fast overload recovery | 5 ns recovery from overdrive preserves sampling fidelity in burst-mode or transient-heavy systems like radar front-ends |
| Wide supply flexibility | Operates from +3 V to +11 V single supply or ±1.4 V to ±5.5 V dual supply-supports battery-powered, industrial, and legacy analog systems |
Applications
| Video Line Driver | Digital Line Driver |
|---|---|
Use Scenario: Driving composite NTSC video signals over 100 m of Cat5 twisted pair in security camera systems. IC Role / Device Role / Timing Role: Single-ended CVBS input to balanced differential output driver with DC coupling and precise gain. Use Value: −60 dB balance error suppresses common-mode EMI radiation; 0.01% differential gain error and 0.06° phase error preserve color fidelity. |
Use Scenario: Transmitting LVDS-compatible differential data from FPGA I/O banks over backplane traces. IC Role / Device Role / Timing Role: Level-shifting and impedance-matched driver converting 3.3 V single-ended logic to 2 Vp-p differential signal. Use Value: 400 MHz bandwidth supports >300 Mbps data rates; 14 ns 0.1% settling ensures clean eye diagrams at multi-tap interconnects. |
| Low-Power Differential ADC Driver | Single-Ended to Differential Level Shifter |
Use Scenario: Conditioning sensor outputs for 16-bit, 100 MSPS SAR ADCs powered from +3 V supply. IC Role / Device Role / Timing Role: Gain-of-2 driver with VOCM-adjustable common-mode output to match ADC input range. Use Value: −94 dBc 3rd harmonic at 5 MHz maximizes SNR; 45 mA linear output current drives 200 Ω ADC input loads without clipping. |
Use Scenario: Converting ground-referenced audio DAC output to differential input of balanced line receiver. IC Role / Device Role / Timing Role: Fixed-gain, zero-drift differential driver with VOCM-set DC offset for AC-coupled signal chains. Use Value: Internal resistor trimming eliminates gain error drift; 1 pF input capacitance minimizes phase shift in wideband audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4509IDGKT | Higher power (22 mA Q), wider bandwidth (2 GHz), but requires external gain resistors and has no VOCM pin | Used where ultra-wideband RF signal conditioning is needed; not drop-in for VOCM-controlled level shifting | Select THS4509IDGKT only when >1 GHz small-signal BW is mandatory and external resistor layout is acceptable |
| LMH6554MA/NOPB | Higher slew rate (6000 V/μs), lower noise (12 nV/√Hz), but fixed VOCM = VCC/2 and no independent common-mode control | Suited for high-fidelity oscilloscope front-ends; cannot adjust output common-mode independently for ADC biasing | Choose LMH6554MA/NOPB for lowest-noise, highest-slew applications where VOCM flexibility is not required |
Compared with AD8131ARMZ, THS4509IDGKT offers superior bandwidth but lacks integrated gain and VOCM control, while LMH6554MA/NOPB delivers lower noise and faster slew but fixes common-mode output at mid-supply-making AD8131ARMZ uniquely suited for cost-sensitive, VOCM-flexible ADC interface and video line driver designs.
Availability
AD8131ARMZ is available at Aetrix Electronics and suitable for video line driver, differential ADC interface, and high-speed digital line driver applications requiring stable component supply, extended temperature operation, and long-term BOM continuity.
Supply support for AD8131ARMZ 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 AD8131ARMZ belongs to Analog Devices' high-speed differential amplifier product line, designed specifically for precision, low-distortion signal conditioning in video, communications, and data acquisition systems where gain accuracy, balance, and common-mode control are critical.
FAQ
What is the maximum operating supply voltage for AD8131ARMZ?
The AD8131ARMZ supports a dual-supply range of ±1.4 V to ±5.5 V and a single-supply range of +2.7 V to +11 V. Absolute maximum ratings specify ±5.5 V on V+ and V− pins; exceeding this risks permanent damage. For reliable operation at +5 V single supply, tie V− to ground and ensure VOCM is biased within 1.0 V to 3.7 V per Table 3.
Does AD8131ARMZ require external resistors to achieve gain of 2?
No, AD8131ARMZ does not require external resistors to achieve its fixed differential gain of 2. The gain is set by precisely trimmed internal 1.5 kΩ and 750 Ω resistors, delivering 1.97–2.04 V/V accuracy across temperature and supply variations. External components are only needed for input termination or capacitive load isolation.
How does the VOCM pin function in AD8131ARMZ?
The VOCM pin on AD8131ARMZ directly controls the common-mode voltage of the differential outputs (+OUT and −OUT) with 1:1 tracking. Applying 2.5 V to VOCM sets both outputs' DC midpoint to 2.5 V, enabling seamless interfacing with single-supply ADCs. This function operates independently of differential gain and remains stable across frequency up to 210 MHz.
Can AD8131ARMZ drive 100 Ω twisted-pair cable directly?
Yes, AD8131ARMZ can drive 100 Ω twisted-pair (e.g., Cat5) directly using on-board series termination: 49.9 Ω resistors placed in each output path form a matched 100 Ω source termination. Its low output impedance (<1 Ω) and −60 dB balance error minimize reflections and radiated EMI, making AD8131ARMZ ideal for point-to-point video and data links up to 100 m.
What is the guaranteed output balance error for AD8131ARMZ at 10 MHz?
AD8131ARMZ guarantees −60 dB output balance error at 10 MHz under ±5 V supply conditions, defined as ΔVOUT,cm/ΔVOUT,dm. This specification is measured with ΔVOUT,dm = 1 V and reflects the device's internal common-mode feedback precision-critical for suppressing harmonics and maintaining ADC SFDR in high-resolution data acquisition systems.
AD8131ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 2000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 500 nA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 11.5mA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8131ARMZ FAQ
1.How can I place an order for AD8131ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8131ARMZ 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 AD8131ARMZ reliable?
The price and inventory of AD8131ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8131ARMZ is usually 5 days.
3.What payment methods are accepted for AD8131ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8131ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8131ARMZ?
AD8131ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8131ARMZ 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 AD8131ARMZ?
For technical support, including AD8131ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8131ARMZ requirements.
6.How does Aetrix verify that AD8131ARMZ is sourced from the original manufacturer or authorized distributors?
All AD8131ARMZ 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 AD8131ARMZ meets industry standards.
7.What is the process for return or replacement of AD8131ARMZ?
All AD8131ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8131ARMZ, 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 AD8131ARMZ part is unused and in its original packaging.
Return procedure for AD8131ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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