Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. ADA4505-4ARUZ

Name: ADA4505-4ARUZ
Brand: Analog Devices Inc.
SKU: ADA4505-4ARUZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ADA4505-4ARUZ

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: ADA4505-4ARUZ.pdf

Description:: IC CMOS 4 CIRCUIT 14TSSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:601

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ADA4505-4ARUZ from Analog Devices is a quad micropower rail-to-rail input/output operational amplifier optimized for ultra-low-power, precision sensing in battery-constrained systems. It delivers 10 µA per amplifier supply current, 3 mV max offset voltage, 105 dB typical CMRR, and operates from 1.8 V to 5 V single supply - enabling high-accuracy signal conditioning in medical monitors and hazard detectors.

For engineers reviewing the ADA4505-4ARUZ datasheet, ADA4505-4ARUZ pinout, ADA4505-4ARUZ application, or ADA4505-4ARUZ equivalent, key selection criteria include its zero-crossover distortion architecture, sub-picoampere input bias current (0.5 pA typ), 50 kHz gain bandwidth, and guaranteed operation across −40°C to +125°C industrial temperature range.

Technical Context

The ADA4505-4ARUZ employs an on-chip charge pump to power its CMOS input stage, eliminating dual-differential-pair crossover distortion while maintaining full rail-to-rail common-mode input range (0 V to V_S). This architecture enables stable DC accuracy and low-noise performance without sacrificing input voltage swing.

It features unity-gain stability, 65 nV/√Hz voltage noise density at 1 kHz, 2.95 µV_p-p 0.1 Hz–10 Hz noise, and 100 dB minimum PSRR - all critical for high-CMRR sensor front-ends where supply voltage drift and common-mode interference must be rejected across battery discharge cycles.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current	7–10 µA per amplifier (typ/max at 25°C); enables >10-year battery life in always-on sensor nodes.
Input Offset Voltage	3 mV maximum (25°C); ensures <±0.1% gain error in 12-bit precision measurement paths.
CMRR	105 dB typical (5 V supply); rejects >99.999% of common-mode interference in bridge sensor interfaces.
PSRR	100 dB minimum (1.8–5 V); limits supply-induced offset shift to ≤14 µV over full battery discharge (1.8–3.2 V).
Input Bias Current	0.5 pA typical; prevents leakage-induced errors in high-impedance pH, ion-selective, or piezoresistive sensor circuits.
Gain Bandwidth	50 kHz; supports anti-aliasing filtering and DC-coupled signal conditioning up to ~8 kHz with ≥60° phase margin.
Operating Temp	−40°C to +125°C; qualified for under-hood automotive sensors, industrial fire/smoke detectors, and portable medical devices.

Pinout & Package

ADA4505-4ARUZ is packaged in a 14-lead TSSOP (RU-14) with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC outline; device is not pin-compatible with SOIC-14 due to different pitch and thermal pad configuration.

Pin/Terminal	Circuit Role	Design Meaning
1	−IN A	Inverting input of Amplifier A; accepts rail-to-rail common-mode signals (0 V to V_S).
2	+IN A	Non-inverting input of Amplifier A; matched to Pin 1 for optimal CMRR in differential configurations.
3	V+	Positive supply rail; supports 1.8–5 V single supply or ±0.9–±2.5 V dual supply operation.
4	OUT B	Output of Amplifier B; rail-to-rail swing (≤5 mV from rails at 100 kΩ load).
5	−IN B	Inverting input of Amplifier B; electrically isolated from other amplifiers per datasheet channel separation specs.
6	+IN B	Non-inverting input of Amplifier B; independent bias network ensures <1 pA input current matching.
7	OUT A	Output of Amplifier A; capable of sourcing/sinking ±3.8 mA short-circuit current.
8	V−	Negative supply rail (GND in single-supply mode); must be connected for proper charge pump operation.
9	OUT D	Output of Amplifier D; identical AC/DC specs to OUT A/B/C; supports independent feedback networks.
10	−IN D	Inverting input of Amplifier D; layout symmetry recommended to minimize inter-channel crosstalk.
11	+IN D	Non-inverting input of Amplifier D; referenced to same V− as all channels for consistent common-mode rejection.
12	V−	Shared negative supply terminal; ties internally to substrate and charge pump ground reference.
13	−IN C	Inverting input of Amplifier C; isolated by guard ring in die layout to maintain >120 dB channel separation at 1 kHz.
14	+IN C	Non-inverting input of Amplifier C; matched input capacitance (4.7 pF common-mode) enables balanced filter design.

Key Features

Feature	Design Value
Zero-crossover distortion input stage	Eliminates input-stage switching artifacts across full 0 V–V_S common-mode range, enabling accurate DC-coupled sensor interfacing without calibration.
On-chip charge pump	Generates internal boosted voltage to drive input MOSFETs, removing need for external bias networks or dual-supply rails in single-supply designs.
Rail-to-rail I/O	Delivers output swing within 5 mV of rails at 100 kΩ load, maximizing dynamic range in low-voltage (1.8 V) systems.
Ultra-low input bias current	0.5 pA typical ensures <1 mV error in 1 GΩ source impedance applications (e.g., electrochemical gas sensors).
High PSRR/CMRR over temp	Maintains ≥95 dB PSRR and ≥80 dB CMRR across −40°C to +125°C, critical for unregulated battery-powered instrumentation.

Applications

Pressure and Position Sensors	Medical Monitors
Use Scenario: Signal conditioning of millivolt-level outputs from MEMS pressure transducers or LVDT position sensors in portable diagnostic tools. IC Role / Device Role / Timing Role: Quad amplifier configures two channels as precision instrumentation amplifier (IA) front-end, one as reference buffer, one as low-pass filter driver. Use Value: 10 µA per amplifier extends battery life beyond 5 years in continuous-use handheld spirometers; 3 mV V_OS enables ±0.25% full-scale accuracy without trimming.	Use Scenario: Front-end amplification of ECG, EEG, or pulse oximeter photodiode currents in wearable patient monitors. IC Role / Device Role / Timing Role: Single amplifier used as transimpedance amplifier (TIA) for photodiode; others implement active filtering and level-shifting for ADC interface. Use Value: 0.5 pA I_B minimizes dark-current-induced baseline drift in low-light optical detection; rail-to-rail output drives 12-bit SAR ADC directly.
Hazard Detectors	Battery-Powered Consumer Equipment
Use Scenario: Signal amplification and threshold detection in smoke, CO, or combustible gas sensors with electrochemical or NDIR sensing elements. IC Role / Device Role / Timing Role: Dual amplifiers form differential comparator with hysteresis; third implements low-drift reference; fourth buffers alarm output. Use Value: 105 dB CMRR rejects EMI from switching power supplies in compact detector enclosures; −40°C to +125°C rating supports attic-mounted fire alarms.	Use Scenario: Sensor signal chain in wireless smart home sensors (temperature, humidity, motion) powered by coin-cell batteries. IC Role / Device Role / Timing Role: One amplifier conditions thermistor voltage divider; second buffers humidity sensor output; remaining two support wake-up comparator and RF interface biasing. Use Value: 7 µA per amplifier enables >10-year shelf life in Bluetooth LE sensors; 1.8 V operation matches alkaline/coin-cell discharge profile without LDO overhead.

Pressure and Position Sensors

Medical Monitors

Use Scenario: Signal conditioning of millivolt-level outputs from MEMS pressure transducers or LVDT position sensors in portable diagnostic tools.

IC Role / Device Role / Timing Role: Quad amplifier configures two channels as precision instrumentation amplifier (IA) front-end, one as reference buffer, one as low-pass filter driver.

Use Value: 10 µA per amplifier extends battery life beyond 5 years in continuous-use handheld spirometers; 3 mV V_OS enables ±0.25% full-scale accuracy without trimming.

Use Scenario: Front-end amplification of ECG, EEG, or pulse oximeter photodiode currents in wearable patient monitors.

IC Role / Device Role / Timing Role: Single amplifier used as transimpedance amplifier (TIA) for photodiode; others implement active filtering and level-shifting for ADC interface.

Use Value: 0.5 pA I_B minimizes dark-current-induced baseline drift in low-light optical detection; rail-to-rail output drives 12-bit SAR ADC directly.

Hazard Detectors

Battery-Powered Consumer Equipment

Use Scenario: Signal amplification and threshold detection in smoke, CO, or combustible gas sensors with electrochemical or NDIR sensing elements.

IC Role / Device Role / Timing Role: Dual amplifiers form differential comparator with hysteresis; third implements low-drift reference; fourth buffers alarm output.

Use Value: 105 dB CMRR rejects EMI from switching power supplies in compact detector enclosures; −40°C to +125°C rating supports attic-mounted fire alarms.

Use Scenario: Sensor signal chain in wireless smart home sensors (temperature, humidity, motion) powered by coin-cell batteries.

IC Role / Device Role / Timing Role: One amplifier conditions thermistor voltage divider; second buffers humidity sensor output; remaining two support wake-up comparator and RF interface biasing.

Use Value: 7 µA per amplifier enables >10-year shelf life in Bluetooth LE sensors; 1.8 V operation matches alkaline/coin-cell discharge profile without LDO overhead.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD8504ARUZ	Same quad micropower architecture but higher 20 µA supply current; 1.5 mV V_OS max; no charge pump (uses dual-pair input).	Lacks zero-crossover distortion; exhibits measurable V_OS nonlinearity near rails - unsuitable for full-swing DC-coupled sensors.	Select AD8504ARUZ only when lower offset is prioritized over rail-to-rail linearity and supply current is not constrained.
LPV821DBVR	Single-channel, 320 nA supply current, 150 µV V_OS max; rail-to-rail I/O but no charge pump; CMRR = 90 dB typ.	Not quad; lacks guaranteed 125°C operation; insufficient CMRR for high-EMI industrial sensor environments.	LPV821DBVR fits ultra-long-life single-channel applications (e.g., IoT node sleep-mode biasing) but cannot replace ADA4505-4ARUZ in multi-channel precision systems.

Compared with AD8504ARUZ and LPV821DBVR, ADA4505-4ARUZ uniquely combines quad integration, zero-crossover linearity, 10 µA supply, and extended temperature range - making it irreplaceable in battery-powered medical and safety-critical sensor front-ends requiring full-rail DC accuracy.

Availability

ADA4505-4ARUZ is available at Aetrix Electronics and suitable for pressure sensors, medical monitors, hazard detectors, and battery-powered consumer equipment requiring stable component supply across long product lifecycles and wide temperature ranges.

Supply support for ADA4505-4ARUZ 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 ADA4505-x family was engineered specifically for ultra-low-power, high-accuracy sensor signal conditioning in battery-operated medical, industrial, and environmental monitoring systems - emphasizing zero-crossover distortion, sub-picoampere bias, and robust operation across extreme temperatures.

FAQ

What is the maximum operating temperature for ADA4505-4ARUZ?

The ADA4505-4ARUZ is fully specified and guaranteed to operate from −40°C to +125°C. This extended industrial temperature range is validated per datasheet Table 3 and supports deployment in under-hood automotive sensors, industrial fire alarms, and portable medical devices exposed to ambient extremes. The 14-lead TSSOP package maintains thermal integrity via its exposed pad, achieving θ_JA = 112°C/W on standard 4-layer PCBs.

Does ADA4505-4ARUZ require external components for its charge pump?

No, ADA4505-4ARUZ integrates a fully self-contained charge pump circuit that requires no external capacitors or biasing components. The charge pump generates an internal boosted voltage to enable rail-to-rail input operation without crossover distortion - a key differentiator from conventional dual-pair op amps. This simplifies PCB layout and eliminates BOM cost associated with external charge pump support.

Can ADA4505-4ARUZ drive a 10 kΩ load while maintaining rail-to-rail output swing?

Yes, ADA4505-4ARUZ delivers rail-to-rail output swing into 10 kΩ loads: VOH ≥ 1.65 V (1.8 V supply) and ≥ 4.9 V (5 V supply); VOL ≤ 25 mV (1.8 V) and ≤ 25 mV (5 V). These values are specified in Tables 1 and 2 of the Rev. E datasheet and confirmed across −40°C to +125°C. For optimal linearity, keep load currents below ±3.8 mA.

Is ADA4505-4ARUZ pin-compatible with other quad op amps in TSSOP-14 packages?

No, ADA4505-4ARUZ is not pin-compatible with standard quad op amps (e.g., LM324, TLV2464) in TSSOP-14. Its pinout is unique: V− appears on Pins 8 and 12, and outputs/inputs are interleaved to minimize crosstalk. Layout reuse requires redesign. Refer to Figure 5 (page 1) of the Rev. E datasheet for authoritative pin mapping.

What is the typical input voltage noise of ADA4505-4ARUZ at 1 kHz?

The typical input voltage noise density of ADA4505-4ARUZ at 1 kHz is 65 nV/√Hz, as specified in both Tables 1 and 2 of the Rev. E datasheet. This value is consistent across 1.8 V and 5 V operation and remains stable over temperature. Combined with 2.95 µV_p-p 0.1 Hz–10 Hz noise, it supports high-resolution DC and low-frequency AC measurements in precision sensor interfaces.

ADA4505-4ARUZ 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:: CMOS

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 0.006V/µs

Gain Bandwidth Product:: 50 kHz

-3db Bandwidth:: -

Current - Input Bias:: 0.5 pA

Voltage - Input Offset:: 500 µV

Current - Supply:: 7µA (x4 Channels)

Current - Output / Channel:: 40 mA

Voltage - Supply Span (Min):: 1.8 V

Voltage - Supply Span (Max):: 5 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

ADA4505-4ARUZ FAQ

1.How can I place an order for ADA4505-4ARUZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4505-4ARUZ 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 ADA4505-4ARUZ reliable?

The price and inventory of ADA4505-4ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4505-4ARUZ is usually 5 days.

3.What payment methods are accepted for ADA4505-4ARUZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4505-4ARUZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4505-4ARUZ?

ADA4505-4ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4505-4ARUZ 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 ADA4505-4ARUZ?

For technical support, including ADA4505-4ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4505-4ARUZ requirements.

6.How does Aetrix verify that ADA4505-4ARUZ is sourced from the original manufacturer or authorized distributors?

All ADA4505-4ARUZ 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 ADA4505-4ARUZ meets industry standards.

7.What is the process for return or replacement of ADA4505-4ARUZ?

All ADA4505-4ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4505-4ARUZ, 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 ADA4505-4ARUZ part is unused and in its original packaging.

Return procedure for ADA4505-4ARUZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…