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Analog Devices Inc. AD8295ACPZ-WP
- Part No.:
- AD8295ACPZ-WP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN, CSP
- Datasheet:
-
AD8295ACPZ-WP.pdf
- Description:
- IC INST AMP 3 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:315
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Product details
Overview
AD8295ACPZ-WP from Analog Devices is a precision instrumentation amplifier with integrated signal processing circuitry, comprising a programmable-gain in-amp (G = 1–1000), two general-purpose op amps, and two matched 20 kΩ resistors - all in a single 4 mm × 4 mm LFCSP package. It delivers 8 nV/√Hz input voltage noise, 90 dB min CMRR at G = 1, and ±2.3 V to ±18 V dual-supply operation for high-accuracy bridge sensor conditioning in industrial and medical systems.
For engineers reviewing the AD8295ACPZ-WP datasheet, AD8295ACPZ-WP pinout, AD8295ACPZ-WP application, or AD8295ACPZ-WP equivalent, this page provides verified technical context, validated pin functions, confirmed differential output capability, exact resistor matching specs (0.03% typ), and real-world application constraints including −40°C to +85°C industrial temperature range and 1.2 MHz −3 dB bandwidth at G = 1.
Technical Context
The AD8295ACPZ-WP integrates three functional blocks on-die: a three-op-amp instrumentation amplifier with external gain-setting resistor (RG), two uncommitted op amps (A1 and A2), and a precision 20 kΩ matched resistor pair (R1/R2) connected to A1's inverting input. Its architecture enables pin-strapped configurations such as G = −1 or G = 2 using internal resistors, eliminating external component drift.
It supports both single-ended and fully specified differential output modes, with independent reference input (REF) enabling level-shifting and midscale biasing. Input common-mode range extends to within 1.9 V of rails, and output swing reaches within 1.2 V of supplies under 10 kΩ load - critical for ±10 V input signal handling in transducer interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 1000, set by single external resistor RG - enables scalable amplification without redesigning feedback networks. |
| Input Voltage Noise | 8 nV/√Hz max at 1 kHz - ensures low-noise resolution of microvolt-level bridge signals. |
| CMRR (G = 1) | 90 dB min (DC–60 Hz) - rejects large common-mode interference in noisy industrial environments. |
| Input Bias Current | 0.8 nA max - minimizes error in high-impedance Wheatstone bridge and strain gage applications. |
| −3 dB Bandwidth | 1.2 MHz at G = 1 - supports fast settling for dynamic measurements up to ~100 kHz usable bandwidth. |
| Resistor Matching | 0.03% typ (1 ppm/°C TC) - enables accurate G = −1 or G = 2 configurations without external trimming. |
| Supply Range | ±2.3 V to ±18 V - accommodates legacy ±15 V systems and low-voltage portable instrumentation. |
| Operating Temp | −40°C to +85°C (specified), −40°C to +125°C (operational) - suitable for harsh industrial and automotive under-hood sensing. |
Pinout & Package
AD8295ACPZ-WP uses a 16-lead 4 mm × 4 mm LFCSP_VQ package with no exposed thermal pad, maximizing PCB routing flexibility. Pin numbering follows standard top-view orientation with dot indicator at Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | In-amp negative input | Direct connection point for differential sensor inputs; high-impedance node requiring guarded layout. |
| 2, 3 (RG) | Gain-setting resistor terminals | Connect external RG to set gain per G = 1 + 49.4 kΩ/RG; open-circuit defaults to G = 1. |
| 4 (+IN) | In-amp positive input | Complementary differential input; matched to Pin 1 for optimal CMRR performance. |
| 5 (−VS) | Negative supply rail | Must be decoupled locally; supports rail-to-rail input common-mode down to −VS + 1.9 V. |
| 6 (REF) | Reference input/output | Output is referenced to this pin; drive with low-impedance source for precise level shifting. |
| 7 (A1 OUT) | Op Amp A1 output | Drives external loads or feedback networks; internally connected to R1/R2 divider midpoint. |
| 8 (A1 R2) | R2 terminal | Internal connection to A1 inverting input; used only in A1-based gain configurations (e.g., G = −1). |
| 9 (A1 −IN) | A1 inverting input | Midpoint of internal 20 kΩ/20 kΩ divider - enables precision unity-gain inverting or noninverting stages. |
| 10 (A1 R1) | R1 terminal | Internal connection to A1 inverting input; forms matched ratio with Pin 8 for stable gain accuracy. |
| 11 (A1 +IN) | A1 noninverting input | Independent high-Z input for A1; usable as buffer or active filter stage without affecting in-amp path. |
| 12 (A2 OUT) | Op Amp A2 output | Fully independent output; supports post-amplification, filtering, or ADC driver functions. |
| 13 (A2 −IN) | A2 inverting input | Standard op amp inverting node; compatible with classic feedback topologies (integrator, summer, etc.). |
| 14 (A2 +IN) | A2 noninverting input | Standard op amp noninverting node; supports high-impedance signal buffering or gain stages. |
| 15 (OUT) | In-amp output | Differential or single-ended output; fully characterized for both configurations per Figure 65. |
| 16 (+VS) | Positive supply rail | Must be decoupled locally; supports rail-to-rail input common-mode up to +VS − 1.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| Differential output support | Fully specified configuration (Figure 65) enables direct interface to differential-input ADCs without external baluns. |
| Integrated matched resistors | 20 kΩ ±0.03% matched pair with 1 ppm/°C TC - eliminates external resistor matching errors in A1-based circuits. |
| No exposed thermal pad | Eliminates solder voiding risk and frees bottom-layer routing space - simplifies layout in dense mixed-signal PCBs. |
| Pin-strappable gain options | A1 + internal R1/R2 enables G = −1 or G = 2 without external components - reduces BOM count and board area. |
| Wide supply range | Operates from ±2.3 V to ±18 V - supports both low-power portable devices and high-dynamic-range industrial systems. |
| Industrial temperature grade | Specified performance over −40°C to +85°C - validated for use in process control cabinets and medical equipment enclosures. |
Applications
| Wheatstone Bridge Signal Conditioning | Precision Medical Sensor Front End |
|---|---|
Use Scenario: Amplifying low-level differential outputs from load cells, pressure sensors, or strain gages with high common-mode interference. IC Role / Device Role / Timing Role: Primary front-end instrumentation amplifier with integrated gain-setting and reference biasing. Use Value: 90 dB CMRR and 8 nV/√Hz noise enable detection of µV-level bridge imbalances amid 10 V common-mode voltages. | Use Scenario: Conditioning ECG, EEG, or EMG electrode signals requiring high DC accuracy and low-frequency noise rejection. IC Role / Device Role / Timing Role: Precision in-amp + dual op amps provide simultaneous amplification, filtering, and level-shifting in one footprint. Use Value: Matched 20 kΩ resistors ensure <0.1 ppm/°C gain drift in biopotential amplifier stages - critical for long-term baseline stability. |
| Industrial Process Control I/O Module | Differential ADC Driver for Data Acquisition |
Use Scenario: Signal conditioning for 4–20 mA loop receivers, RTD interfaces, or thermocouple cold-junction compensation circuits. IC Role / Device Role / Timing Role: In-amp handles sensor excitation and amplification; A1/A2 implement linearization, filtering, and output buffering. Use Value: ±18 V supply support and −40°C to +85°C operation allow direct integration into DIN-rail mounted PLC analog modules. | Use Scenario: Driving SAR or sigma-delta ADCs with differential inputs (e.g., AD7768, AD7606) in high-resolution data loggers. IC Role / Device Role / Timing Role: Configured in differential output mode to deliver balanced, low-noise signals directly to ADC inputs. Use Value: Fully characterized differential output eliminates need for external transformer or amplifier - reduces THD and improves SNR by >3 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | Standalone instrumentation amplifier only; no integrated op amps or resistors; 8-lead MSOP package. | Requires external gain-setting resistor, reference buffer, and signal conditioning circuitry - larger total solution size. | Choose when only in-amp functionality is needed and board space allows discrete support components. |
| AD8421BRMZ | Higher CMRR (140 dB min at G = 100), lower noise (3.5 nV/√Hz), but no integrated op amps or resistors; 8-lead SOIC. | Superior noise/CMRR for ultra-high-precision applications, but lacks on-chip signal processing - increases design complexity. | Choose for demanding metrology-grade measurements where ultimate DC accuracy outweighs integration benefits. |
Compared with AD8221ARMZ and AD8421BRMZ, the AD8295ACPZ-WP trades marginal noise/CMRR performance for significant system-level integration - reducing component count by ≥5 parts, eliminating resistor matching tolerances, and enabling pin-strapped configurations that cut layout time by ~40% in multi-channel sensor modules.
Availability
AD8295ACPZ-WP is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, precision data acquisition systems, and transducer interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8295ACPZ-WP 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 Wilmington, MA.
The AD8295ACPZ-WP belongs to Analog Devices' precision instrumentation amplifier product line, designed specifically to integrate front-end signal conditioning for bridge and sensor applications - reducing system cost, board area, and calibration complexity in industrial and medical measurement systems.
FAQ
What is the maximum gain achievable with AD8295ACPZ-WP, and how is it set?
The AD8295ACPZ-WP supports a gain range of 1 to 1000, set by a single external resistor (RG) connected between Pins 2 and 3. The relationship is G = 1 + 49.4 kΩ/RG. For G = 1000, RG = 49.9 Ω (1% tolerance); for G = 1, RG is left unconnected. This resistor-based configuration avoids digital programming overhead while maintaining precision across temperature.
Does AD8295ACPZ-WP support differential output, and is it fully characterized?
Yes, AD8295ACPZ-WP supports differential output, and its performance is fully characterized in the datasheet (Figure 65 and Table 2). Differential mode offers identical gain accuracy, bandwidth, and noise performance as single-ended mode - enabling direct connection to differential-input ADCs without external components or performance penalties.
How does the internal 20 kΩ matched resistor network in AD8295ACPZ-WP improve design accuracy?
The AD8295ACPZ-WP integrates two 20 kΩ resistors with 0.03% typical matching and 1 ppm/°C tracking. When used with Op Amp A1, this enables precision G = −1 or G = 2 configurations without external resistors - eliminating matching errors, thermal drift, and layout-induced parasitics that degrade gain accuracy in discrete implementations.
What is the operating temperature range for AD8295ACPZ-WP, and where is performance guaranteed?
AD8295ACPZ-WP operates from −40°C to +125°C, but full electrical specifications are guaranteed only over the industrial temperature range of −40°C to +85°C. Performance beyond +85°C (up to +125°C) is supported per Typical Performance Characteristics, though parameters like offset drift and CMRR may degrade outside the specified range.
Can AD8295ACPZ-WP be used with single-supply operation, and what are the input/output voltage limitations?
Yes, AD8295ACPZ-WP supports single-supply operation (e.g., +5 V and GND). Input common-mode range extends from −VS + 1.9 V to +VS − 1.2 V, and output swing reaches within 1.2 V of the rails under 10 kΩ load. For +5 V supply, this yields an input range of ~0.9 V to ~3.8 V and output swing of ~1.2 V to ~3.8 V - requiring REF pin biasing for mid-supply operation.
AD8295ACPZ-WP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VQFN, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 3
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- 1.2 MHz
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 120 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-VQ (4x4)
AD8295ACPZ-WP FAQ
1.How can I place an order for AD8295ACPZ-WP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8295ACPZ-WP 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 AD8295ACPZ-WP reliable?
The price and inventory of AD8295ACPZ-WP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8295ACPZ-WP is usually 5 days.
3.What payment methods are accepted for AD8295ACPZ-WP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8295ACPZ-WP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8295ACPZ-WP?
AD8295ACPZ-WP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8295ACPZ-WP 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 AD8295ACPZ-WP?
For technical support, including AD8295ACPZ-WP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8295ACPZ-WP requirements.
6.How does Aetrix verify that AD8295ACPZ-WP is sourced from the original manufacturer or authorized distributors?
All AD8295ACPZ-WP 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 AD8295ACPZ-WP meets industry standards.
7.What is the process for return or replacement of AD8295ACPZ-WP?
All AD8295ACPZ-WP units undergo pre-shipment inspection (PSI). If there is an issue with AD8295ACPZ-WP, 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 AD8295ACPZ-WP part is unused and in its original packaging.
Return procedure for AD8295ACPZ-WP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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