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Analog Devices Inc. AD8476ACPZ-R7
- Part No.:
- AD8476ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD8476ACPZ-R7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,515
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Product details
Overview
AD8476ACPZ-R7 from Analog Devices is a low-power, unity-gain, fully differential amplifier optimized as an ADC driver with rail-to-rail outputs, 330 μA supply current, −126 dB HD2 / −128 dB HD3 at 10 kHz, and 6 MHz small-signal bandwidth - enabling precision single-ended-to-differential conversion for battery-powered instrumentation and 16-bit SAR/Σ-Δ ADCs up to 250 kSPS.
For engineers reviewing the AD8476ACPZ-R7 datasheet, AD8476ACPZ-R7 pinout, AD8476ACPZ-R7 application, or AD8476ACPZ-R7 equivalent, key selection criteria include output common-mode control via VOCM, robust ±23 V input overvoltage tolerance, 200 µV max output offset, 39 nV/√Hz noise, and compatibility with switched-capacitor ADC front ends requiring fast settling (1.0 µs to 0.01%).
Technical Context
The AD8476ACPZ-R7 implements a voltage-feedback fully differential architecture with integrated laser-trimmed 10 kΩ gain resistors, delivering precise unity gain (1 V/V) and high CMRR (90 dB min) through matched resistor networks. Its dual feedback loops independently regulate differential output voltage and output common-mode voltage - the latter forced to match the VOCM pin voltage via internal common-mode feedback.
It supports single-supply (3–18 V) and dual-supply (±1.5 V to ±9 V) operation, features rail-to-rail outputs with 0.125 V headroom from rails at +5 V, and maintains 1 ppm/°C gain drift and 200 µV max output offset across −40°C to +125°C - making it suitable for high-accuracy, low-power signal conditioning in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 330 μA at +5 V - enables <1.5 mW power dissipation for ultra-low-power portable systems. |
| Small-Signal Bandwidth | 6 MHz - supports accurate amplification of signals up to ~1 MHz before −3 dB roll-off. |
| Slew Rate | 10 V/μs - ensures faithful reproduction of fast transient signals without slew-induced distortion. |
| THD + N | −102 dB at 10 kHz - meets dynamic range requirements of 16-bit ADCs with minimal harmonic contamination. |
| Output Noise Density | 39 nV/√Hz - contributes <1 LSB error in 16-bit, 100 kSPS systems with typical source impedances. |
| Gain Error | 0.04% max - eliminates need for system-level gain calibration in precision measurement chains. |
| Output Offset | 200 µV max - reduces DC error contribution when driving high-resolution ADCs directly. |
Pinout & Package
AD8476ACPZ-R7 is housed in a 16-lead, 3 mm × 3 mm LFCSP package with exposed paddle (EPAD) requiring soldering to ground plane for thermal and electrical performance. Pin 12 is NC (no internal connection); all −VS pins (13–16) and +VS pins (5–8) must be connected to respective supplies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP (Pins 1, 2) | Positive Input | Differential or single-ended input node; dual pins provide low-impedance path and reduce layout asymmetry. |
| INN (Pins 3, 4) | Negative Input | Complementary input node; matched pairing with INP ensures balanced signal injection. |
| +VS (Pins 5–8) | Positive Supply | Four parallel connections minimize supply impedance and improve PSRR above 100 kHz. |
| −VS (Pins 13–16) | Negative Supply | Four parallel connections ensure stable bias for internal common-mode feedback loop. |
| VOCM (Pin 9) | Output Common-Mode Adjust | Directly sets output common-mode voltage (e.g., 2.5 V for 5 V ADCs); high-impedance (500 kΩ) input. |
| +OUT (Pin 10) | Noninverting Output | Delivers rail-to-rail differential output; 0.1 Ω output impedance enables direct drive of 2 kΩ ADC inputs. |
| −OUT (Pin 11) | Inverting Output | Complementary output; maintains amplitude/phase balance with +OUT up to 1 MHz (−80 dB error). |
| NC (Pin 12) | No Connect | Internally unconnected; recommended to tie to ground to prevent noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range (e.g., 0–5 V or ±2.5 V) with only 125 mV headroom at +5 V supply. |
| VOCM-controlled common-mode level | Allows precise matching of amplifier output common-mode to ADC input requirements without external resistive dividers. |
| Integrated laser-trimmed 10 kΩ resistors | Guarantees 0.04% max gain error and 90 dB min CMRR - eliminating discrete resistor matching tolerances. |
| ±23 V input overvoltage protection | Permits direct interface with industrial sensors or transducers exceeding supply rails without external clamping. |
| 1.0 µs settling to 0.01% | Meets timing budget for 250 kSPS acquisition in 16-bit SAR ADCs without added delay or buffer stages. |
Applications
| Portable Data Acquisition | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered handheld multimeter acquiring thermocouple or RTD signals at ≤250 kSPS. IC Role / Device Role: Single-ended sensor output → differential drive for 16-bit Σ-Δ ADC with VOCM set to 2.5 V. Use Value: 330 μA quiescent current extends battery life; 200 µV offset and 39 nV/√Hz noise preserve 16-bit ENOB. |
Use Scenario: 4–20 mA loop-powered transmitter conditioning bridge sensor output for isolated ADC. IC Role / Device Role: Differential instrumentation amplifier building block with common-mode rejection >90 dB. Use Value: Integrated resistor matching eliminates external trimming; ±23 V overvoltage tolerance protects against field wiring faults. |
| Low-Power Medical Instrumentation | Energy Metering Front End |
|
Use Scenario: Wearable ECG monitor digitizing biopotential signals using low-noise 16-bit SAR ADC. IC Role / Device Role: Low-distortion ADC driver with −128 dB HD3 ensuring clean spectral integrity for HRV analysis. Use Value: 10 V/μs slew rate handles pace spikes without distortion; rail-to-rail output maximizes dynamic range. |
Use Scenario: Polyphase electricity meter measuring voltage/current channels with metrology-grade ADCs. IC Role / Device Role: Precision differential driver for anti-aliasing-filtered voltage inputs prior to 24-bit Σ-Δ converter. Use Value: 1 ppm/°C gain drift maintains accuracy across temperature; 6 MHz bandwidth preserves harmonic content up to 50th. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8475ARMZ | Fixed VOCM (2.048 V), 8-lead MSOP, 350 μA IQ, 5 MHz bandwidth, no VOCM pin. | Best for space-constrained designs where fixed 2.048 V output common-mode matches reference voltage. | Select AD8475ARMZ when VOCM flexibility is unnecessary and PCB area is critical; AD8476ACPZ-R7 preferred when adjustable VOCM is required. |
| LTC6363IMS8E#PBF | Higher power (1.3 mA), 105 MHz bandwidth, 1.5 nV/√Hz noise, ±15 V supplies, no overvoltage protection. | Targets high-speed, high-precision applications (e.g., 18-bit, 1 MSPS) where speed outweighs power constraints. | Select LTC6363IMS8E#PBF only if >10× bandwidth is needed and ±23 V input protection is handled externally; AD8476ACPZ-R7 remains optimal for low-power, robust industrial use. |
Compared with AD8475ARMZ and LTC6363IMS8E#PBF, AD8476ACPZ-R7 uniquely balances ultra-low power (330 μA), precision (200 µV offset, 90 dB CMRR), and ruggedness (±23 V overvoltage) - making it the only choice for battery-powered, field-deployable 16-bit data acquisition where efficiency, accuracy, and reliability are jointly critical.
Availability
AD8476ACPZ-R7 is available at Aetrix Electronics and suitable for portable data acquisition, industrial sensor signal conditioning, and low-power medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD8476ACPZ-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, with design and manufacturing expertise spanning precision amplifiers, data converters, and RF solutions.
The AD8476ACPZ-R7 belongs to Analog Devices' precision fully differential amplifier product line, engineered specifically for low-power, high-accuracy ADC driving in battery-operated and industrial measurement systems demanding rail-to-rail operation and robust input protection.
FAQ
What is the operating supply voltage range for AD8476ACPZ-R7?
The AD8476ACPZ-R7 operates from a single supply of 3 V to 18 V or dual supplies of ±1.5 V to ±9 V. Absolute maximum ratings allow ±10 V supplies, but specified performance is guaranteed only within the operating range. At +5 V single supply, it draws 330 μA and delivers rail-to-rail output swing with 125 mV headroom.
How does the VOCM pin function in AD8476ACPZ-R7?
The VOCM pin on AD8476ACPZ-R7 directly sets the output common-mode voltage (VOUT,cm) to match the ADC's input range - for example, applying 2.5 V yields V+OUT and V−OUT centered at 2.5 V. With 500 kΩ input impedance, it can be driven by a high-impedance reference or left open for midsupply self-biasing.
Can AD8476ACPZ-R7 drive switched-capacitor ADC inputs without external buffering?
Yes - AD8476ACPZ-R7 is explicitly designed to drive switched-capacitor ADC front ends. Its 10 V/μs slew rate, 0.1 Ω output impedance, and 1.0 µs settling to 0.01% enable direct interface with SAR and Σ-Δ ADCs up to 250 kSPS without added op-amp buffers or isolation resistors.
What is the maximum input overvoltage tolerance of AD8476ACPZ-R7?
AD8476ACPZ-R7 withstands input voltages up to +VS + 18 V and −VS − 18 V due to integrated ESD diodes - supporting ±23 V overvoltage protection when operated on ±5 V supplies. This allows direct connection to industrial sensors or transducers without external clamping circuitry.
Is AD8476ACPZ-R7 suitable for driving 16-bit ADCs at 250 kSPS?
Yes - AD8476ACPZ-R7 is characterized for driving 16-bit converters up to 250 kSPS. Its 1.0 µs settling time to 0.01%, −102 dB THD + N at 10 kHz, 200 µV max output offset, and 39 nV/√Hz noise collectively preserve effective number of bits (ENOB) ≥15.5 under typical conditions.
AD8476ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 5 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 330µA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 18 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-WQ (3x3)
AD8476ACPZ-R7 FAQ
1.How can I place an order for AD8476ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8476ACPZ-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 AD8476ACPZ-R7 reliable?
The price and inventory of AD8476ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8476ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8476ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8476ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8476ACPZ-R7?
AD8476ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8476ACPZ-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 AD8476ACPZ-R7?
For technical support, including AD8476ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8476ACPZ-R7 requirements.
6.How does Aetrix verify that AD8476ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8476ACPZ-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 AD8476ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8476ACPZ-R7?
All AD8476ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8476ACPZ-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 AD8476ACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8476ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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