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Analog Devices Inc. AD8224HACPZ-R7
- Part No.:
- AD8224HACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN, CSP
- Datasheet:
-
AD8224HACPZ-R7.pdf
- Description:
- IC INST AMP 2 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:110
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Product details
Overview
AD8224HACPZ-R7 from Analog Devices is a dual-channel, JFET-input instrumentation amplifier in a 4 mm × 4 mm LFCSP package, delivering rail-to-rail output, 10 pA max input bias current (B grade), 100 dB min CMRR at G = 10, and 1.5 MHz bandwidth at G = 1 - deployed in high-precision medical sensor front-ends and transducer interfaces requiring ultra-low input current and wide supply range.
For engineers reviewing the AD8224HACPZ-R7 datasheet, AD8224HACPZ-R7 pinout, AD8224HACPZ-R7 application, or AD8224HACPZ-R7 equivalent, this page provides verified technical context, validated pin functions, confirmed dual-channel differential-output capability, exact gain-setting resistor interface, and real-world use cases for precision data acquisition systems operating on single +5 V or dual ±18 V supplies.
Technical Context
The AD8224HACPZ-R7 integrates two fully independent instrumentation amplifiers sharing only supply rails and reference terminals; each channel uses a three-op-amp topology with JFET inputs to achieve sub-10 pA bias current and 14 nV/√Hz input voltage noise at 1 kHz. Its custom LFCSP package features a hidden thermal paddle internally tied to +VS, enabling PCB routing underneath without compromising bias current performance.
Gain is set per channel via external resistors (RG1/RG2) using G = 1 + 49.4 kΩ/RG, supporting 1–1000× range; REF1/REF2 allow independent output level shifting per channel. The device supports both single-ended output (each OUTx referenced to ground) and true differential output (OUT1 and OUT2 driven 180° out-of-phase) for driving high-resolution ADCs with enhanced noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 10 pA max (B grade) - enables high-impedance sensor interfacing without signal loading |
| CMRR | 100 dB min at G = 10, DC–60 Hz - rejects common-mode interference in noisy industrial environments |
| Bandwidth | 1.5 MHz at G = 1 - supports fast settling for dynamic sensor signals up to ~100 kHz |
| Supply Range | +4.5 V to +36 V single or ±2.25 V to ±18 V dual - operates directly from battery or industrial rails |
| Quiescent Current | 750 µA per amplifier - enables multi-channel precision sensing in power-constrained portable devices |
| Output Swing | Rail-to-rail, ±14.25 V on ±15 V supplies - maximizes dynamic range for 16-bit+ ADCs |
| Input Voltage Range | Extends 0.1 V below −VS - accommodates ground-referenced sensors without level-shifting circuitry |
Pinout & Package
AD8224HACPZ-R7 uses a 16-lead, 4 mm × 4 mm LFCSP package with hidden thermal paddle (CP-16-26 variant); the exposed pad is internally connected to +VS and may be left unconnected or soldered to the +VS plane for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12 | −IN1, −IN2 | Inverting inputs for Channel 1 and Channel 2 - high-impedance JFET nodes for differential sensor connection |
| 2, 3, 10, 11 | RG1, RG2 | Gain-setting resistor terminals (dual pins per channel for low-inductance layout) |
| 4, 9 | +IN1, +IN2 | Non-inverting inputs for Channel 1 and Channel 2 - matched to −IN pins for optimal CMRR |
| 5, 16 | +VS | Positive supply pins - dual connections reduce IR drop and improve PSRR |
| 6, 7 | REF1, REF2 | Reference inputs for output level setting per channel - enable independent DC offset control |
| 8, 13 | −VS | Negative supply pins - dual connections ensure balanced return path for both amplifiers |
| 14, 15 | OUT2, OUT1 | Amplified outputs - support single-ended loads or differential pairing (e.g., OUT1/OUT2 to ADC inputs) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel integration in 4 mm × 4 mm footprint | Doubles channel density vs. discrete single-channel IAs - reduces board area by >50% in multi-sensor systems |
| Rail-to-rail output stage | Delivers full-scale swing on +5 V supply - eliminates need for level-shifting before 12–16-bit SAR ADCs |
| Configurable differential output mode | Enables noise-immune transmission over cables to differential-input ADCs without external inverters |
| 4 kV HBM ESD protection | Withstands handling and system-level transients - reduces need for external TVS in medical/sensor modules |
| Single-resistor gain programming per channel | Simplifies calibration and field adjustment - avoids complex digital gain control in analog front-ends |
Applications
| Medical Instrumentation | Precision Data Acquisition |
|---|---|
|
Use Scenario: Front-end amplification of low-amplitude biopotential signals (ECG, EEG) from dry electrodes with high source impedance. IC Role / Device Role / Timing Role: Dual-channel IA conditioning two independent sensor channels while rejecting 50/60 Hz mains interference. Use Value: 10 pA input bias current prevents electrode polarization drift; 100 dB CMRR ensures diagnostic-grade signal fidelity. |
Use Scenario: Simultaneous measurement of strain gauge bridges and thermocouple outputs in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Two matched IAs provide isolated, gain-programmable signal paths with shared reference control. Use Value: Independent REF1/REF2 pins enable zero-offset calibration per channel; rail-to-rail output drives 24-bit delta-sigma ADCs directly. |
| Transducer Interfaces | Remote Sensors |
|
Use Scenario: Amplifying millivolt-level outputs from pressure transducers in automotive brake-line monitoring systems. IC Role / Device Role / Timing Role: Single-chip dual IA replaces two discrete AD8220s - reducing component count and layout complexity. Use Value: ±18 V dual-supply operation matches vehicle battery range; 4.5 V–36 V single-supply mode supports 12 V/24 V systems without regulators. |
Use Scenario: Signal conditioning for wireless IoT nodes measuring vibration or temperature over long cables in factory settings. IC Role / Device Role / Timing Role: Configured as differential-output IA to drive twisted-pair cabling to central ADC unit. Use Value: Differential output rejects induced noise; 1.5 MHz bandwidth preserves transient response of impact events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8222ARZ | Single-channel, SOIC-8; 125 µA lower quiescent current but 50 pA max input bias current | Lacks dual-channel integration and differential output mode; requires two units for same functionality | Select when board space allows discrete layout and ultra-low power (<700 µA/channel) is prioritized over channel density |
| INA128UA | SOIC-8, BJT input; 500 pA max input bias current, 120 dB CMRR at G = 100, no rail-to-rail output | Higher input current limits high-Z sensor use; output swing limited to within 1.5 V of rails on ±15 V | Select for legacy designs needing proven BJT-based stability and higher CMRR at high gains, accepting larger board footprint |
Compared with AD8224HACPZ-R7, AD8222ARZ offers lower power but sacrifices integration and differential capability, while INA128UA delivers superior high-gain CMRR but cannot interface directly with low-voltage ADCs due to non-rail-to-rail output and higher input current.
Availability
AD8224HACPZ-R7 is available at Aetrix Electronics and suitable for medical instrumentation, precision data acquisition, and remote sensor systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD8224HACPZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The AD8224 belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for low-power, high-channel-density signal conditioning in portable and distributed sensing applications where JFET input performance and flexible gain architecture are critical.
FAQ
What is the maximum supply voltage for AD8224HACPZ-R7?
The AD8224HACPZ-R7 supports absolute maximum supply voltages of ±18 V for dual supplies or +36 V for single-ended operation. For reliable long-term operation, Analog Devices specifies the recommended operating range as ±2.25 V to ±18 V (dual) or +4.5 V to +36 V (single). Exceeding ±18 V risks permanent damage per the Absolute Maximum Ratings table.
Does AD8224HACPZ-R7 support differential output configuration?
Yes, AD8224HACPZ-R7 supports true differential output mode by configuring Channel 1 and Channel 2 as complementary drivers - OUT1 and OUT2 deliver inverted signals referenced to each other. This configuration is explicitly detailed in Figure 64 and Tables 4 and 7 of the Rev. D datasheet, enabling direct interface to differential-input ADCs without external inversion circuitry.
What is the purpose of the dual RG pins (pins 2/3 and 10/11) on AD8224HACPZ-R7?
The dual RG pins per channel (RG1 on pins 2 & 3; RG2 on pins 10 & 11) provide low-inductance, Kelvin-style connections for the external gain-setting resistor. This layout minimizes parasitic impedance in the gain-setting path, preserving CMRR and bandwidth accuracy - especially critical at high gains (G = 100–1000) where small resistor tolerances significantly affect error.
Can AD8224HACPZ-R7 operate from a single +5 V supply?
Yes, AD8224HACPZ-R7 is fully specified for single +5 V operation (VS+ = 5 V, VS− = 0 V), with rail-to-rail output swing of 0.25 V to 4.75 V (RL = 2 kΩ) and input common-mode range extending from −0.1 V to +3 V. This enables direct interfacing with 3.3 V or 5 V microcontrollers and ADCs without level-shifting components.
What is the function of the exposed thermal pad on AD8224HACPZ-R7?
The exposed thermal pad on AD8224HACPZ-R7 is internally connected to the +VS supply rail. It may be left unconnected or soldered to a +VS copper plane to reduce θJA from 86°C/W to 48°C/W - improving thermal performance and enabling higher ambient temperature operation or increased output current capability without exceeding the 130°C junction limit.
AD8224HACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VQFN, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 MHz
- Current - Input Bias:
- 25 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 750µA (x2 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-VQ (4x4)
AD8224HACPZ-R7 FAQ
1.How can I place an order for AD8224HACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8224HACPZ-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 AD8224HACPZ-R7 reliable?
The price and inventory of AD8224HACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8224HACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8224HACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8224HACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8224HACPZ-R7?
AD8224HACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8224HACPZ-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 AD8224HACPZ-R7?
For technical support, including AD8224HACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8224HACPZ-R7 requirements.
6.How does Aetrix verify that AD8224HACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8224HACPZ-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 AD8224HACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8224HACPZ-R7?
All AD8224HACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8224HACPZ-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 AD8224HACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8224HACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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