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Analog Devices Inc. AD8290ACPZ-R7
- Part No.:
- AD8290ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-UFQFN Exposed Pad, CSP
- Datasheet:
-
AD8290ACPZ-R7.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:694
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Product details
Overview
AD8290ACPZ-R7 from Analog Devices is a precision CMOS sensor amplifier with integrated programmable current excitation source, fixed gain of 50 V/V, 120 dB CMRR, ±100 pA input bias current, and operation from 2.6 V to 5.5 V supply - designed for bridge-based pressure, temperature, and strain gage sensing in portable instrumentation.
For engineers reviewing the AD8290ACPZ-R7 datasheet, AD8290ACPZ-R7 pinout, AD8290ACPZ-R7 application, or AD8290ACPZ-R7 equivalent, this device delivers verified low-noise signal conditioning (0.75 µV p-p, 0.1–10 Hz), factory-trimmed excitation current (300–1300 µA), and industrial-temperature operation (−40°C to +85°C) in a space-constrained 3.0 mm × 3.0 mm LFCSP package.
Technical Context
The AD8290ACPZ-R7 integrates a current-mode correction instrumentation amplifier and a precision 0.9 V-referenced current source. Its autocorrection topology enables 120 dB CMRR and 0.75 µV p-p 0.1–10 Hz input-referred noise while rejecting 1/f drift across temperature.
Excitation current is set by an external RSET resistor (692 Ω to 3 kΩ), delivering 300–1300 µA with ±1.0% accuracy and ±50 ppm/°C drift. The output stage includes internal 10 kΩ series resistance and supports antialiasing filtering via CF1/CF2 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 50 V/V - eliminates external gain-setting components and ensures stable, repeatable amplification for bridge output signals. |
| CMRR | 120 dB - rejects common-mode interference from noisy environments, critical for high-accuracy bridge measurements. |
| Input Bias Current | ±100 pA - minimizes voltage error across high-impedance sensor bridges (e.g., 6 kΩ max), preserving signal fidelity. |
| Excitation Current Range | 300 µA to 1300 µA - programmable via RSET to match sensor requirements without external current sources. |
| Supply Voltage Range | 2.6 V to 5.5 V - supports single-supply battery-powered systems (e.g., 3.3 V or 3.6 V Li-ion) and dual-supply configurations. |
| Quiescent Current | 1.2 mA + 2× excitation current - enables ultra-low-power operation in portable devices; drops to 0.5 µA in shutdown mode. |
| Output Offset Voltage | 865–935 mV at 25°C - internally referenced to 0.9 V, simplifying ADC interfacing with ratiometric or fixed-reference systems. |
| Small-Signal Bandwidth | 0.25 kHz - optimized for DC and low-frequency sensor outputs (e.g., pressure/strain), with external RC filtering support. |
Pinout & Package
AD8290ACPZ-R7 uses a 16-lead, 3.0 mm × 3.0 mm × 0.55 mm lead-free LFCSP package with exposed paddle (floating, not connected). Pin 17 (exposed pad) is NC and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 9, 12, 16 | No Connect (NC) | Must be tied to GND per datasheet; floating NCs risk instability or ESD susceptibility. |
| 2 | VCC | Positive power supply input - requires 0.1 µF bypass capacitor to GND (Pin 10) for noise suppression. |
| 3 | ENBL | Enable/disable logic control - high = active (1.2 mA + 2× IEXC); low = shutdown (≤10 µA). |
| 4 | VOUT | Amplifier output node - connects to 6.8 nF CFILTER for clock feedthrough reduction; high-impedance when disabled. |
| 5, 6 | CF2 / CF1 | Filter capacitor terminals - form 235 Hz antialiasing RC filter with internal 100 kΩ and external 68 nF capacitor. |
| 10 | GND | Ground reference - serves as return path for excitation current, RSET, and bypass capacitors. |
| 11 | RSET | Excitation current programming node - connects one end of RSET (692 Ω–3 kΩ) to GND (Pin 10) to set IEXC = 0.9 V / RSET. |
| 13 | IOUT | Current source output - delivers programmable excitation to sensor bridge; requires 0.1 µF CBRIDGE to GND for noise filtering. |
| 14, 15 | VINN / VINP | Differential input terminals - accept bridge output signals; high impedance (50 MΩ || 1 pF) minimizes loading error. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Excitation Source | Eliminates discrete current source ICs or op-amp circuits, reducing BOM count and layout area in sensor front-ends. |
| Autocorrection Amplifier Topology | Reduces 1/f noise and offset drift, enabling <0.75 µV p-p noise (0.1–10 Hz) and ±50 µV/°C offset TC over −40°C to +85°C. |
| Programmable Excitation Accuracy | ±1.0% initial accuracy and ±50 ppm/°C drift ensure stable bridge drive across temperature without calibration. |
| Low-Power Shutdown Mode | 0.5 µA quiescent current allows duty-cycled operation in battery-powered IoT sensors without sacrificing wake-up speed (5 ms start-up). |
| Single-Supply Compatibility | Operates down to 2.6 V with rail-to-rail output swing (0.075 V to VCC − 0.075 V), supporting direct interface to 3.3 V microcontrollers and ADCs. |
| Internal 0.9 V Reference | Provides stable output offset level independent of external references, simplifying ratiometric ADC designs and reducing component count. |
Applications
| Pressure Sensor Bridge | Temperature Sensor Interface |
|---|---|
Use Scenario: Signal conditioning for Honeywell HPX050AS or Fujikura FGN-615PGSR pressure transducers in handheld medical or industrial gauges. IC Role / Device Role / Timing Role: Provides matched excitation current (e.g., 300 µA) and high-CMRR amplification (G = 50) to convert mV-level bridge output into robust analog voltage. Use Value: Enables sub-0.1% full-scale error over temperature without external trimming, meeting ISO 80601 medical device accuracy requirements. | Use Scenario: Interfacing platinum RTD (e.g., PT100) or thermistor bridges in portable environmental monitors. IC Role / Device Role / Timing Role: Supplies precise, low-drift excitation current and amplifies differential voltage with minimal self-heating error. Use Value: Achieves <0.05°C measurement resolution using 24-bit sigma-delta ADCs, supported by 0.75 µV p-p low-frequency noise performance. |
| Strain Gage Load Cell | Portable Battery-Powered Instrumentation |
Use Scenario: Weighing modules in handheld scales or torque sensors in cordless tools. IC Role / Device Role / Timing Role: Drives 350 Ω or 1 kΩ Wheatstone bridges and conditions microvolt-level outputs with high PSR (>120 dB). Use Value: Maintains 16-bit effective resolution under varying supply conditions (2.6–5.5 V), eliminating need for LDO regulation in cost-sensitive designs. | Use Scenario: Low-power data loggers for field-deployed structural health monitoring or agricultural sensors. IC Role / Device Role / Timing Role: Enables burst-mode operation: ENBL-driven shutdown between readings reduces average current to <1 µA. Use Value: Extends CR2032 battery life beyond 2 years at 1-sample-per-minute duty cycle, validated per datasheet shutdown current spec (0.5 µA typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensor amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA333AIDGKR | Fixed gain options include 50 V/V; no integrated excitation source - requires external current source or DAC. | Suitable for existing designs with separate excitation; lacks single-chip drive/sense integration. | Select if gain flexibility (1–1000 V/V) or lower quiescent current (50 µA) outweighs need for integrated excitation. |
| AD8420ARMZ | Fixed G = 50; higher supply range (2.7–36 V); no excitation source; 100 dB CMRR (vs. 120 dB). | Better suited for industrial 24 V systems; lacks low-voltage portability and excitation programmability. | Select for wide-supply industrial bridges where excitation is provided externally and 120 dB CMRR is not required. |
Compared with INA333AIDGKR and AD8420ARMZ, AD8290ACPZ-R7 uniquely combines precision excitation current generation, 120 dB CMRR, and sub-1 µA shutdown in a 3 mm × 3 mm package - making it the only single-chip solution for portable, battery-operated bridge sensor systems requiring both drive and sense functionality.
Availability
AD8290ACPZ-R7 is available at Aetrix Electronics and suitable for portable instrumentation, industrial pressure transmitters, and battery-powered environmental sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD8290ACPZ-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 AD8290ACPZ-R7 belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for integrated sensor signal conditioning in space- and power-constrained applications such as portable medical devices and industrial IoT endpoints.
FAQ
What is the exact gain setting and tolerance of the AD8290ACPZ-R7?
The AD8290ACPZ-R7 has a factory-trimmed fixed gain of exactly 50 V/V, with a guaranteed gain error of ±0.5% (typical) and ±1.0% (max) over temperature and supply voltage. This eliminates external gain resistors and ensures consistent signal scaling across production units without calibration.
How is the excitation current programmed on the AD8290ACPZ-R7?
The excitation current on the AD8290ACPZ-R7 is set by connecting an external resistor RSET between Pin 11 (RSET) and Pin 10 (GND). The current is calculated as IEXC = 0.9 V / RSET, supporting 300–1300 µA with RSET values from 692 Ω to 3 kΩ. AD8290ACPZ-R7's internal 0.9 V reference ensures accuracy independent of supply voltage.
Does the AD8290ACPZ-R7 support dual-supply operation?
Yes, the AD8290ACPZ-R7 supports dual-supply operation (e.g., ±1.8 V). In this mode, GND pins become the negative supply reference, and specifications shift accordingly - e.g., input range becomes −1.6 V to +1.6 V (for ±1.8 V), output offset inverts to −935 mV to −865 mV, and ENBL logic thresholds adjust relative to the negative rail.
What is the purpose of the CF1 and CF2 pins on the AD8290ACPZ-R7?
The CF1 and CF2 pins on the AD8290ACPZ-R7 connect to opposite ends of an external 68 nF capacitor that forms a 235 Hz antialiasing filter with an internal 100 kΩ resistor. This filter suppresses high-frequency noise and clock feedthrough from the auto-zero amplifier, ensuring clean output for ADC sampling at ≤100 Hz.
Can the AD8290ACPZ-R7 drive low-impedance loads directly?
No - the AD8290ACPZ-R7 output includes a built-in 10 kΩ series resistor (R3) to isolate the internal amplifier from capacitive loads and reduce clock feedthrough. For low-impedance or high-speed loads, use the CF2 pin to access the internal amplifier output before this resistor, then add an external buffer if needed.
AD8290ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-UFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 250 kHz
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- -
- Current - Supply:
- 1.2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.6 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-UQ (3x3)
AD8290ACPZ-R7 FAQ
1.How can I place an order for AD8290ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8290ACPZ-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 AD8290ACPZ-R7 reliable?
The price and inventory of AD8290ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8290ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8290ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8290ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8290ACPZ-R7?
AD8290ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8290ACPZ-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 AD8290ACPZ-R7?
For technical support, including AD8290ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8290ACPZ-R7 requirements.
6.How does Aetrix verify that AD8290ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8290ACPZ-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 AD8290ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8290ACPZ-R7?
All AD8290ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8290ACPZ-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 AD8290ACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8290ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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