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Analog Devices Inc. ADA4091-4ARUZ
- Part No.:
- ADA4091-4ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADA4091-4ARUZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:177
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Product details
Overview
ADA4091-4ARUZ from Analog Devices is a quad, micropower, rail-to-rail input/output operational amplifier with overvoltage protection (OVP), 1.2 MHz gain bandwidth, 200 µA per amplifier supply current, and guaranteed operation from +3.0 V to +30 V single supply or ±1.5 V to ±15 V dual supplies. It serves as a precision signal-conditioning front-end in battery-powered instrumentation and industrial sensor interfaces.
For engineers reviewing the ADA4091-4ARUZ datasheet, ADA4091-4ARUZ pinout, ADA4091-4ARUZ application, or ADA4091-4ARUZ equivalent, this page delivers verified specifications, TSSOP-14 package layout, OVP behavior at ±5 V/±15 V rails, rail-to-rail swing performance, and real-world use cases in transducer amplification and power supply monitoring.
Technical Context
The ADA4091-4ARUZ employs a dual-input-stage architecture-PNP for low common-mode voltages and NPN for high common-mode voltages-enabling true rail-to-rail input operation without phase reversal. Its OVP circuitry integrates 5 kΩ series resistors and bidirectional DIACs (42 V breakdown) to safely clamp inputs up to 25 V beyond ±5 V rails or 12 V beyond ±15 V rails.
Output stage uses collector-connected PNP/NPN transistors to achieve <50 mV saturation voltage near rails, enabling full rail-to-rail output swing into 10 kΩ loads. Closed-loop impedance remains ≤77 Ω at 1 MHz, supporting stable operation in multistage filter and DAC buffer configurations across −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +3.0 V to +30 V single supply; ±1.5 V to ±15 V dual supply - enables direct interface with Li-ion, 12 V, and 24 V industrial systems. |
| Gain Bandwidth Product | 1.22 MHz - supports stable unity-gain buffers and 2nd-order active filters up to ~100 kHz with margin. |
| Input Offset Voltage | ±250 µV max (25°C), ±600 µV max (−40°C to +125°C) - ensures <1 LSB error in 12-bit DAC output amplification at 5 V full scale. |
| Supply Current per Amp | 200 µA typical (±5 V), 250 µA typical (±15 V) - allows 4-channel operation under 1 mA total, critical for coin-cell–powered remote sensors. |
| OVP Threshold | +25 V / −25 V relative to ±5 V rails; +12 V / −12 V relative to ±15 V rails - protects against transient surges in motor control feedback loops. |
| CMRR | 95 dB min (±5 V, 25°C), 88 dB min (−40°C to +125°C) - rejects common-mode noise from noisy DC-DC converters in mixed-signal PCBs. |
| Output Swing | Within 10 mV of rails (RL = 100 kΩ); within 100 mV (RL = 10 kΩ) - preserves dynamic range in single-supply data acquisition stages. |
Pinout & Package
ADA4091-4ARUZ is packaged in a 14-lead TSSOP (RU-14) with exposed pad recommended to be connected to V–. Pin numbering follows standard JEDEC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −INA | Inverting input of Amplifier A - accepts signals down to V– with no phase reversal due to PNP input stage. |
| 2 | +INA | Non-inverting input of Amplifier A - supports common-mode range extending 15 V beyond rails when OVP engaged. |
| 3 | +V | Positive supply pin - must be decoupled with ≥0.1 µF ceramic capacitor close to pin for stability. |
| 4 | OUTB | Output of Amplifier B - drives loads up to ±20 mA short-circuit current with rail-to-rail swing. |
| 5 | −INB | Inverting input of Amplifier B - shares same OVP and rail-to-rail input structure as all four amps. |
| 6 | +INB | Non-inverting input of Amplifier B - enables differential sensing with matched offset drift (2.5 µV/°C). |
| 7 | OUTA | Output of Amplifier A - optimized for low closed-loop impedance (77 Ω @ 1 MHz) in high-frequency buffering. |
| 8 | −IND | Inverting input of Amplifier D - electrically isolated from other channels; channel separation >100 dB @ 1 kHz. |
| 9 | +IND | Non-inverting input of Amplifier D - supports independent biasing for 4-channel sensor front-ends. |
| 10 | −V | Negative supply pin - exposed pad must be soldered to this net for thermal and EMI performance. |
| 11 | OUTC | Output of Amplifier C - maintains 0.46 V/µs slew rate and 22 µs settling to 0.01% across temperature. |
| 12 | −INC | Inverting input of Amplifier C - matches input bias current (±50 nA typ) and offset specs of other channels. |
| 13 | +INC | Non-inverting input of Amplifier C - identical input voltage range (±15 V at ±15 V supply) to all channels. |
| 14 | OUTD | Output of Amplifier D - fully specified for −40°C to +125°C operation with no derating required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal capture in 3.3 V microcontroller ADC systems without level-shifting circuitry. |
| Overvoltage protection (OVP) | Prevents latch-up and phase reversal when inputs exceed rails by up to 25 V (at ±5 V supply), eliminating external clamping diodes. |
| 200 µA per amplifier supply current | Supports always-on 4-channel sensor conditioning in energy-harvesting nodes with <1 µA sleep leakage. |
| 1.2 MHz bandwidth with 0.46 V/µs slew rate | Accurately reproduces 100 kHz sine waves with <0.1% THD+N in unity-gain configuration. |
| −40°C to +125°C operating range | Qualified for under-hood automotive and industrial PLC modules without thermal derating. |
| Low 0.8 µV p-p (0.1–10 Hz) input noise | Maintains >80 dB SNR in low-frequency strain gauge bridges with 100 mV full-scale output. |
Applications
| Battery-Powered Instrumentation | Industrial Process Control |
|---|---|
|
Use Scenario: Portable pH meter with 3-electrode sensor and 3.3 V MCU. IC Role / Device Role / Timing Role: Quad amplifier configures as 3-channel sensor signal conditioner (buffer, reference, difference amp) plus 1-channel DAC output driver. Use Value: Rail-to-rail I/O captures full electrode potential range (±400 mV); 200 µA per amp extends AA battery life to >2 years in standby mode. |
Use Scenario: 4–20 mA loop transmitter with HART modulation in factory automation. IC Role / Device Role / Timing Role: Precision current-sense amplifier and voltage-controlled current source driver. Use Value: OVP withstands 24 V loop transients; CMRR >95 dB rejects common-mode noise from adjacent AC wiring. |
| Power Supply Control & Protection | Remote Sensors |
|
Use Scenario: Overvoltage/overcurrent monitor in 12 V DC-DC converter for telecom equipment. IC Role / Device Role / Timing Role: Comparator input stage and fault amplifier feeding microcontroller ADC. Use Value: Input survives 36 V surge events without damage; 250 µV offset ensures accurate 1% trip-point detection at 12 V. |
Use Scenario: Wireless temperature node using thermistor bridge and sub-GHz RF SoC. IC Role / Device Role / Timing Role: Low-power bridge amplifier and anti-aliasing filter driver. Use Value: 1.2 MHz GBW supports 10 kHz filter cutoff; 0.46 V/µs slew rate avoids distortion on fast step responses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8684ARUZ | Higher supply current (600 µA/amp), wider bandwidth (10 MHz), no OVP | Better for high-speed filtering but requires external protection in harsh environments | Select AD8684ARUZ only when speed >5 MHz is mandatory and OVP is implemented externally. |
| OP4177ARUZ | Lower offset (60 µV max), higher PSRR (130 dB), 2.8 mA/amp supply current | Superior DC precision but unsuitable for battery-powered designs due to 11× higher quiescent current | Choose OP4177ARUZ for lab-grade instrumentation where power is not constrained and offset drift is critical. |
Compared with AD8684ARUZ and OP4177ARUZ, ADA4091-4ARUZ uniquely balances micropower operation (200 µA), integrated OVP, and rail-to-rail I/O in a single quad package-making it optimal for space-constrained, field-deployed systems requiring robustness and ultra-low power.
Availability
ADA4091-4ARUZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial process control, and power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4091-4ARUZ 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 ADA4091-4ARUZ belongs to Analog Devices' 36 V precision op-amp family, engineered specifically for low-power, high-reliability signal conditioning in harsh industrial and portable environments.
FAQ
What is the maximum input voltage the ADA4091-4ARUZ can tolerate without damage?
The ADA4091-4ARUZ features integrated overvoltage protection allowing inputs to safely exceed the supply rails by up to +25 V/−25 V at ±5 V supplies or +12 V/−12 V at ±15 V supplies. Absolute maximum input voltage is limited by the ±36 V absolute maximum supply rating; exceeding these OVP thresholds risks permanent damage. Always limit input current to ±5 mA per pin using external series resistors in high-energy transient environments.
Does the ADA4091-4ARUZ support true rail-to-rail input operation across its full temperature range?
Yes, the ADA4091-4ARUZ maintains rail-to-rail input capability from −40°C to +125°C. Its dual-input-stage architecture (PNP + NPN) ensures continuous linear operation even when inputs reach V– or V+, with no phase reversal or latch-up. Input voltage range is specified as −15 V to +15 V at ±15 V supplies across the full temperature range, confirmed in Tables 2–4 of the Rev. H datasheet.
Can the ADA4091-4ARUZ drive a 10 kΩ load while maintaining rail-to-rail output swing?
Yes, the ADA4091-4ARUZ delivers rail-to-rail output swing into 10 kΩ loads: VOH ≥ 4.900 V and VOL ≤ −4.975 V at ±5 V supplies (25°C), and VOH ≥ 14.800 V and VOL ≤ −14.940 V at ±15 V supplies (25°C). Output swing degrades by <100 mV versus 100 kΩ loading, enabling full-scale signal fidelity in buffered ADC driver and DAC output stages.
What is the typical supply current per amplifier in the ADA4091-4ARUZ at +5 V single supply?
At +5 V single supply (equivalent to ±2.5 V dual), the ADA4091-4ARUZ draws 180 µA to 225 µA per amplifier (typical), as specified in Table 3 of the Rev. H datasheet. This value increases to 200–250 µA per amplifier at ±5 V dual supply and remains within 350 µA maximum across −40°C to +125°C - making it ideal for always-on sensor nodes.
Is the ADA4091-4ARUZ pin-compatible with other quad op-amps in TSSOP-14 packages?
No, the ADA4091-4ARUZ has a proprietary pinout optimized for its OVP architecture and quad functionality. It is not pin-compatible with industry-standard quad op-amps like LM324 or TLV2464. Engineers must follow the exact pin mapping shown in Figure 3 of the datasheet (TSSOP-14 RU-14) and route accordingly - especially noting that +V and −V are on pins 3 and 10, not adjacent corners.
ADA4091-4ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.46V/µs
- Gain Bandwidth Product:
- 1.27 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 35 µV
- Current - Supply:
- 200µA (x4 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
ADA4091-4ARUZ FAQ
1.How can I place an order for ADA4091-4ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4091-4ARUZ 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 ADA4091-4ARUZ reliable?
The price and inventory of ADA4091-4ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4091-4ARUZ is usually 5 days.
3.What payment methods are accepted for ADA4091-4ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4091-4ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4091-4ARUZ?
ADA4091-4ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4091-4ARUZ 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 ADA4091-4ARUZ?
For technical support, including ADA4091-4ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4091-4ARUZ requirements.
6.How does Aetrix verify that ADA4091-4ARUZ is sourced from the original manufacturer or authorized distributors?
All ADA4091-4ARUZ 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 ADA4091-4ARUZ meets industry standards.
7.What is the process for return or replacement of ADA4091-4ARUZ?
All ADA4091-4ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4091-4ARUZ, 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 ADA4091-4ARUZ part is unused and in its original packaging.
Return procedure for ADA4091-4ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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