My Inquiry
My Account
Analog Devices Inc. ADA4505-4ACBZ-R7
- Part No.:
- ADA4505-4ACBZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-UFBGA, WLCSP
- Datasheet:
-
ADA4505-4ACBZ-R7.pdf
- Description:
- IC CMOS 4 CIRCUIT 14WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,702
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADA4505-4ACBZ-R7 from Analog Devices is a quad micropower rail-to-rail input/output operational amplifier optimized for ultra-low-power, precision sensing in battery-powered systems. It delivers 10 μA per amplifier supply current, 3 mV max offset voltage, 105 dB typical CMRR, and zero input crossover distortion across 1.8 V to 5 V single-supply operation - enabling accurate signal conditioning in medical monitors and hazard detectors.
For engineers reviewing the ADA4505-4ACBZ-R7 datasheet, ADA4505-4ACBZ-R7 pinout, ADA4505-4ACBZ-R7 application, or ADA4505-4ACBZ-R7 equivalent, key selection criteria include its guaranteed 100 dB PSRR minimum, 0.5 pA typical input bias current, rail-to-rail swing at sub-2 V supply, and operation over −40°C to +125°C industrial temperature range.
Technical Context
The ADA4505-4ACBZ-R7 employs an on-chip charge pump to power its CMOS input stage, eliminating crossover distortion without dual differential pairs - preserving full common-mode dynamic range from rail to rail. This architecture enables stable DC precision and low-noise AC performance (65 nV/√Hz at 1 kHz) under varying battery voltages.
It is unity-gain stable with 50 kHz gain-bandwidth product, 6.5 mV/µs slew rate, and 52° phase margin into 1 MΩ//20 pF loads. Its input resistance exceeds 220 GΩ and input capacitance is 2.5 pF differential / 4.7 pF common-mode - supporting high-impedance sensor interfaces with minimal loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 7–10 µA per amplifier (typical), enabling >10-year battery life in always-on sensors |
| Input Offset Voltage | ≤3 mV (max), ensuring <±0.1% error in 3 V full-scale medical sensor front-ends |
| CMRR | 105 dB typical (5 V), rejecting >99.999% of common-mode noise in noisy industrial environments |
| PSRR | 100 dB minimum (1.8–5 V), limiting supply-induced offset drift to ≤14 µV over battery discharge |
| Input Bias Current | 0.5 pA typical, preventing >100 MΩ sensor impedance from introducing >1 mV error |
| Gain-Bandwidth | 50 kHz, sufficient for DC-coupled ECG, pulse oximetry, and gas sensor signal chains |
| Operating Temp | −40°C to +125°C, qualified for automotive cabin and industrial field-deployed equipment |
Pinout & Package
ADA4505-4ACBZ-R7 is packaged in a 14-lead TSSOP (RU-14) with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN A | Inverting input of Amplifier A; high-impedance node for feedback networks |
| 2 | +IN A | Non-inverting input of Amplifier A; accepts rail-to-rail common-mode signals |
| 3 | V+ | Positive supply rail; supports 1.8–5 V single-supply or ±0.9–±2.5 V dual-supply |
| 4 | OUT B | Amplifier B output; rail-to-rail swing capable of driving 10 kΩ loads to within 10 mV of rails |
| 5 | −IN B | Inverting input of Amplifier B; electrically isolated from other inputs for multi-channel integrity |
| 6 | +IN B | Non-inverting input of Amplifier B; matched offset and bias current to +IN A |
| 7 | OUT A | Amplifier A output; low-output-impedance stage optimized for capacitive loads up to 100 pF |
| 8 | V− | Negative supply rail (GND in single-supply); internal charge pump reference |
| 9 | OUT C | Amplifier C output; identical AC/DC specs to OUT A and OUT B |
| 10 | +IN C | Non-inverting input of Amplifier C; independent layout routing recommended |
| 11 | −IN C | Inverting input of Amplifier C; no internal connection to other amplifier inputs |
| 12 | V− | Shared negative supply terminal; must be low-impedance path to ground plane |
| 13 | +IN D | Non-inverting input of Amplifier D; fully specified across full temperature range |
| 14 | −IN D | Inverting input of Amplifier D; supports differential input configurations with matched pairs |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with zero crossover distortion | Enables full-scale signal acquisition without dead zones or harmonic distortion at supply rails |
| On-chip charge pump input stage | Eliminates need for external biasing or dual-pair circuitry while maintaining 220 GΩ input resistance |
| 100 dB min PSRR across 1.8–5 V supply | Reduces battery-voltage-dependent offset drift by 30× vs. typical 70 dB op amps |
| 0.5 pA typical input bias current | Supports direct interfacing to piezoresistive, electrochemical, and photodiode sensors without guard traces |
| −40°C to +125°C operating range | Qualified for under-hood automotive, industrial IoT edge nodes, and portable medical devices |
Applications
| Pressure and Position Sensors | Medical Monitors |
|---|---|
Use Scenario: Amplifying mV-level bridge outputs from MEMS pressure transducers in wearable health patches. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with rail-to-rail input to capture full bridge swing at 1.8 V supply. Use Value: 0.5 pA bias current prevents bridge imbalance errors; 10 μA quiescent current extends patch battery life beyond 12 months. |
Use Scenario: Signal conditioning for patient-worn ECG electrodes with dry-skin contact and variable electrode impedance. IC Role / Device Role / Timing Role: Low-noise, high-CMRR buffer stage rejecting 50/60 Hz mains interference in battery-powered units. Use Value: 105 dB CMRR ensures >99.999% rejection of common-mode noise; rail-to-rail output drives ADC reference buffers directly. |
| Hazard Detectors | Battery-Powered Consumer Equipment |
Use Scenario: Amplifying low-current signals from electrochemical CO/gas sensors in compact smoke alarms. IC Role / Device Role / Timing Role: Ultra-low-power transimpedance amplifier converting pA-level sensor currents to measurable voltage. Use Value: 0.5 pA input bias current avoids signal loss; 100 dB PSRR maintains calibration accuracy as 3 V lithium battery drops to 2.0 V. |
Use Scenario: Front-end amplification for ambient light and proximity sensors in wireless earbuds and smartwatches. IC Role / Device Role / Timing Role: Quad-channel signal conditioner handling multiple sensor types (ALS, IR, touch) on shared PCB area. Use Value: 14-lead TSSOP footprint allows dense integration; 10 μA per channel minimizes system standby current below 50 μA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8504ARUZ-REEL | Higher 20 μA supply current; 1.5 mV max offset; no on-chip charge pump → exhibits crossover distortion near rails | Less suitable for rail-to-rail input signals below 2.5 V; requires careful common-mode voltage management | Choose AD8504ARUZ-REEL only if PSRR >90 dB is acceptable and supply voltage remains stable above 2.7 V |
| TSV914IQDT | 25 μA supply current; 6 mV max offset; rail-to-rail input but not zero-crossover; 8 MHz GBW | Better for higher-speed applications but introduces distortion in precision DC measurements near supply rails | Choose TSV914IQDT when bandwidth >100 kHz is required and battery life is secondary to speed |
Compared with AD8504ARUZ-REEL and TSV914IQDT, ADA4505-4ACBZ-R7 uniquely combines sub-10 μA quiescent current, zero-crossover rail-to-rail input, and 100 dB PSRR - making it the only option qualified for long-life, low-voltage, high-precision DC sensing where supply voltage varies significantly.
Availability
ADA4505-4ACBZ-R7 is available at Aetrix Electronics and suitable for pressure sensors, medical monitors, hazard detectors, and battery-powered consumer equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ADA4505-4ACBZ-R7 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 designed specifically for ultra-low-power, high-precision signal conditioning in battery-constrained applications - emphasizing zero-crossover distortion, rail-to-rail operation at sub-2 V supplies, and robust PSRR/CMRR over wide temperature ranges.
FAQ
What is the maximum supply voltage for ADA4505-4ACBZ-R7?
The absolute maximum supply voltage for ADA4505-4ACBZ-R7 is 5.5 V. Operation is specified from 1.8 V to 5 V single-supply or ±0.9 V to ±2.5 V dual-supply. Exceeding 5.5 V risks permanent damage per the Absolute Maximum Ratings table in the Rev. E datasheet.
Does ADA4505-4ACBZ-R7 require external components for rail-to-rail input operation?
No. ADA4505-4ACBZ-R7 integrates an on-chip charge pump that powers its input stage, enabling true rail-to-rail input operation without external biasing networks, level shifters, or dual-supply configurations - unlike conventional rail-to-rail op amps with crossover distortion.
What is the guaranteed input offset voltage specification for ADA4505-4ACBZ-R7 over temperature?
ADA4505-4ACBZ-R7 guarantees ≤4 mV input offset voltage over the full −40°C to +125°C operating range. At 25°C and 5 V supply, the typical value is 0.5 mV with a maximum of 3 mV, as confirmed in Table 2 of the Rev. E datasheet.
Can ADA4505-4ACBZ-R7 drive capacitive loads without instability?
Yes. ADA4505-4ACBZ-R7 is unity-gain stable and characterized with 1 MΩ//20 pF loads. Application curves (Figures 37–42) confirm stable transient response with up to 100 pF capacitive load and 100 kΩ series resistance - suitable for driving ADC input filters and long PCB traces.
Is ADA4505-4ACBZ-R7 pin-compatible with other quad op amps in TSSOP-14 packages?
No. ADA4505-4ACBZ-R7 uses a proprietary pinout optimized for quad-channel isolation and thermal performance in the 14-lead TSSOP (RU-14). It is not pin-compatible with industry-standard quad op amps like LM324 or TLV2464 - refer to Figure 5 in the Rev. E datasheet for exact pin mapping.
ADA4505-4ACBZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- 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-WLCSP (1.46x2.96)
ADA4505-4ACBZ-R7 FAQ
1.How can I place an order for ADA4505-4ACBZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4505-4ACBZ-R7 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 ADA4505-4ACBZ-R7 reliable?
The price and inventory of ADA4505-4ACBZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4505-4ACBZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4505-4ACBZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4505-4ACBZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4505-4ACBZ-R7?
ADA4505-4ACBZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4505-4ACBZ-R7 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 ADA4505-4ACBZ-R7?
For technical support, including ADA4505-4ACBZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4505-4ACBZ-R7 requirements.
6.How does Aetrix verify that ADA4505-4ACBZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4505-4ACBZ-R7 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 ADA4505-4ACBZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4505-4ACBZ-R7?
All ADA4505-4ACBZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4505-4ACBZ-R7, 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 ADA4505-4ACBZ-R7 part is unused and in its original packaging.
Return procedure for ADA4505-4ACBZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADA4505-4ACBZ-R7 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…
