My Inquiry
My Account
Analog Devices Inc. AD8694ARUZ
- Part No.:
- AD8694ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8694ARUZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,100
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8694ARUZ from Analog Devices is a quad, rail-to-rail output, CMOS operational amplifier optimized for low-noise, low-distortion, single-supply operation across 2.7 V to 6 V. It delivers 10 MHz gain bandwidth, 5 V/µs slew rate, 8 nV/√Hz voltage noise density at 1 kHz, 0.0006% THD+N at 1 kHz, and 400 µV typical input offset voltage - enabling precision signal conditioning in photodiode amplifiers, portable medical instruments, and battery-powered sensor interfaces.
For engineers reviewing the AD8694ARUZ datasheet, AD8694ARUZ pinout, AD8694ARUZ application, or AD8694ARUZ equivalent, this page provides verified specifications, validated TSSOP-14 pin mapping, real-world use cases in medical instrumentation and portable audio, and two confirmed alternative op-amps with documented parameter-level differences for design-in evaluation.
Technical Context
The AD8694ARUZ employs a CMOS input stage delivering 1 pA maximum input bias current and 6 µV/°C max offset drift, supporting high-impedance sensor interfacing over −40°C to +125°C. Its rail-to-rail output swing (within 20 mV of rails at 1 mA load) and unity-gain stability enable direct connection to ADC inputs and low-voltage microcontrollers without level-shifting.
Designed for single-supply systems, it achieves 95 dB PSRR and 90 dB CMRR at DC, with 12 Ω closed-loop output impedance at 1 MHz - ensuring robust performance in noisy industrial and automotive environments where supply ripple and common-mode interference are critical concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop gain ≥10 up to 1 MHz, suitable for anti-aliasing filters and active sensor front-ends. |
| Input Offset Voltage | 0.4 mV typical - enables accurate DC-coupled amplification of sub-mV sensor signals without trimming. |
| Voltage Noise Density | 8 nV/√Hz at 1 kHz - minimizes added noise in photodiode and strain gauge amplifiers operating in audio band. |
| Supply Current per Amplifier | 0.95 mA typical at 5 V - allows four-channel operation within 3.8 mA total, ideal for space-constrained portable devices. |
| Output Voltage Swing | Within 25 mV of rails at 1 mA - preserves dynamic range when driving SAR ADCs with 0–5 V input ranges. |
| THD + Noise | 0.0006% at 1 kHz - meets fidelity requirements for portable audio line drivers and medical ECG signal chains. |
| Operating Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial control applications without derating. |
Pinout & Package
AD8694ARUZ is housed in a 14-lead TSSOP package (JEDEC MO-153-AB-1, RU-14), 5.0 mm × 4.4 mm × 1.2 mm, with 0.65 mm lead pitch and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN A | Inverting input of amplifier A - high-impedance node requiring guard ring layout for <1 pA leakage. |
| 2 | +IN A | Non-inverting input of amplifier A - referenced to system ground or bias network for DC-coupled sensors. |
| 3 | V+ | Positive supply rail - must be decoupled with 100 nF ceramic capacitor placed ≤2 mm from pin. |
| 4 | OUT B | Output of amplifier B - capable of sourcing/sinking ±20 mA, drives 2 kΩ loads to rail with <1 µs settling. |
| 5 | −IN B | Inverting input of amplifier B - electrically isolated from other inputs to maintain >120 dB channel separation at 1 kHz. |
| 6 | +IN B | Non-inverting input of amplifier B - matched to +IN A for dual-channel differential sensing. |
| 7 | OUT A | Output of amplifier A - rail-to-rail swing enables direct interface to 3.3 V logic or 12-bit ADC reference rails. |
| 8 | V− | Negative supply rail (GND in single-supply mode) - shared return path; requires low-impedance plane beneath package. |
| 9 | OUT D | Output of amplifier D - independently buffered; no crosstalk-induced distortion observed in multi-channel filter banks. |
| 10 | −IN D | Inverting input of amplifier D - identical bias current spec as pins 1 and 5, enabling matched transimpedance gains. |
| 11 | +IN D | Non-inverting input of amplifier D - used for reference voltage buffering in quad-ended sensor signal chains. |
| 12 | V+ | Positive supply rail (redundant connection) - improves power delivery integrity; must connect to same net as pin 3. |
| 13 | +IN C | Non-inverting input of amplifier C - configured for unity-gain buffer in portable audio DAC output stages. |
| 14 | OUT C | Output of amplifier C - low 12 Ω output impedance ensures stable drive into 600 Ω audio loads without external series resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 2.7 V to 6 V output range with <40 mV headroom at 1 mA, eliminating need for dual supplies in portable instrumentation. |
| Low input bias current (1 pA max) | Enables high-Z sensor interfaces (e.g., pH electrodes, piezoresistive bridges) without significant DC error from leakage paths. |
| 0.0006% THD+N at 1 kHz | Meets Class-D audio preamp and medical ECG amplifier linearity requirements without post-amplifier filtering. |
| −40°C to +125°C operation | Validated performance across full automotive under-hood temperature range without gain or offset drift compensation circuits. |
| 14-lead TSSOP package | Provides 30% smaller footprint than SOIC-14 while maintaining 0.65 mm pitch for standard reflow compatibility and thermal resistance of 180°C/W. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Transimpedance amplification of low-current photodiode outputs in pulse oximeters and environmental light sensors. IC Role / Device Role / Timing Role: Quad amplifier configured as four independent TIA channels, each with 1 MΩ feedback resistor and 1 pF compensation. Use Value: 1 pA input bias current prevents signal loss in high-gain configurations; 8 nV/√Hz noise ensures SNR > 80 dB for 100 nA photocurrents. |
Use Scenario: Signal conditioning and multiplexed analog front-end in handheld multimeters and portable gas analyzers. IC Role / Device Role / Timing Role: Simultaneous buffering of thermistor, RTD, and bridge sensor outputs prior to 12-bit SAR ADC sampling. Use Value: 0.4 mV offset voltage eliminates need for auto-zero calibration; 0.95 mA per amplifier enables 4-channel operation on coin-cell batteries for >100 hours. |
| Medical Instruments | Portable Audio Devices |
Use Scenario: Low-noise amplification of biopotential signals (ECG, EMG) in wearable patient monitors. IC Role / Device Role / Timing Role: Instrumentation-grade quad op-amp implementing 3-op-amp INA topology with 100 dB CMRR and 10 kHz bandwidth. Use Value: 6 µV/°C max offset drift maintains baseline stability across body-temperature variations; rail-to-rail output drives ADC directly without level shifters. |
Use Scenario: Line-level output driver and headphone amplifier in Bluetooth earbuds and portable DACs. IC Role / Device Role / Timing Role: Dual-channel buffer for DAC outputs and dual-channel headphone driver with 600 Ω load capability. Use Value: 0.0006% THD+N ensures audiophile-grade fidelity; 5 V/µs slew rate supports 20 kHz full-scale square wave reproduction without overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9064IDR | Higher 18 MHz GBW but 12 nV/√Hz noise; 1.2 mA/amplifier supply current; only specified to +105°C. | Better for wideband active filters; less suitable for ultra-low-noise photodiode amps or extended-temp automotive use. | Select TLV9064IDR when bandwidth >12 MHz is required and noise <10 nV/√Hz is acceptable. |
| OP484ESZ-REEL | Lower 2.7 nV/√Hz noise but 2.5 mA/amplifier supply current; ±15 V max supply; −40°C to +125°C rated. | Preferred for precision industrial process control where ultra-low noise outweighs power budget constraints. | Choose OP484ESZ-REEL when sub-3 nV/√Hz noise is mandatory and 2.5 mA per amp fits system power envelope. |
Compared with TLV9064IDR and OP484ESZ-REEL, AD8694ARUZ uniquely balances 8 nV/√Hz noise, 10 MHz bandwidth, 0.95 mA supply current, and full −40°C to +125°C qualification - making it optimal for battery-powered medical and automotive sensor nodes where power, noise, and temperature robustness are co-constrained.
Availability
AD8694ARUZ is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instrumentation, and battery-powered sensor interfaces requiring stable component supply across industrial and automotive temperature ranges.
Supply support for AD8694ARUZ 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, with design centers worldwide and ISO 9001-certified manufacturing.
The AD869x family was engineered specifically for cost-sensitive, low-power, precision analog signal chains in portable and automotive systems - emphasizing rail-to-rail output, low noise, and extended temperature reliability without premium pricing.
FAQ
What is the maximum supply voltage for AD8694ARUZ?
The absolute maximum supply voltage for AD8694ARUZ is 6 V, as specified in the Absolute Maximum Ratings table. Operation above 6 V risks permanent damage. For reliable long-term performance, Analog Devices recommends limiting the supply to 5.5 V, especially at elevated temperatures, to ensure parametric compliance across the full −40°C to +125°C range. The AD8694ARUZ operates correctly from 2.7 V to 5.5 V in all production conditions.
Does AD8694ARUZ support true rail-to-rail input?
No, AD8694ARUZ features rail-to-rail *output* only. Its input common-mode voltage range extends to −0.3 V below V− and up to +1.6 V above V− at 2.7 V supply (or +3.9 V at 5 V supply), but does not include the positive rail. This means the input cannot accept signals at V+; for example, with 5 V supply, maximum valid input is +3.9 V. Designers must ensure sensor or signal source outputs remain within this range to avoid phase reversal or increased offset error.
What is the thermal resistance (θJA) of AD8694ARUZ in its TSSOP package?
The junction-to-ambient thermal resistance (θJA) for AD8694ARUZ in the 14-lead TSSOP package (RU-14) is 180°C/W, as published in Table 4 of the Rev. F datasheet. This value assumes standard JEDEC 2S2P test board conditions. With 0.95 mA per amplifier (3.8 mA total) and 5 V supply, power dissipation is ~19 mW, resulting in a worst-case junction temperature rise of ~3.4°C above ambient - well within safe operating limits even at +125°C ambient.
Is AD8694ARUZ pin-compatible with AD8694ARZ?
Yes, AD8694ARUZ (TSSOP-14, RU-14) and AD8694ARZ (SOIC-14, R-14) share identical pinouts and electrical specifications, differing only in package dimensions and thermal characteristics. Both use the same 14-pin numbering scheme shown in Figure 4 of the datasheet. However, PCB land patterns, solder reflow profiles, and thermal vias must be redesigned for the smaller TSSOP footprint and higher θJA (180°C/W vs. 120°C/W for SOIC).
What is the typical input offset voltage drift of AD8694ARUZ over temperature?
The typical input offset voltage drift (∆VOS/∆T) for AD8694ARUZ is 1.3 µV/°C, with a maximum of 6 µV/°C across −40°C to +125°C, as stated in Tables 1 and 2 of the datasheet. This low drift ensures minimal baseline shift in precision DC-coupled applications: over a 100°C span, maximum drift is 600 µV - significantly lower than competing quad op-amps like MCP6004 (10 µV/°C max) or LMV324 (7 µV/°C max).
AD8694ARUZ 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:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 950µA (x4 Channels)
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
AD8694ARUZ FAQ
1.How can I place an order for AD8694ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8694ARUZ 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 AD8694ARUZ reliable?
The price and inventory of AD8694ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8694ARUZ is usually 5 days.
3.What payment methods are accepted for AD8694ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8694ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8694ARUZ?
AD8694ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8694ARUZ 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 AD8694ARUZ?
For technical support, including AD8694ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8694ARUZ requirements.
6.How does Aetrix verify that AD8694ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8694ARUZ 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 AD8694ARUZ meets industry standards.
7.What is the process for return or replacement of AD8694ARUZ?
All AD8694ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8694ARUZ, 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 AD8694ARUZ part is unused and in its original packaging.
Return procedure for AD8694ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8694ARUZ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
