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Analog Devices Inc. AD8295BCPZ-R7
- Part No.:
- AD8295BCPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN, CSP
- Datasheet:
-
AD8295BCPZ-R7.pdf
- Description:
- IC INST AMP 3 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:6,969
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Product details
Overview
AD8295BCPZ-R7 from Analog Devices is a precision instrumentation amplifier IC integrating a programmable-gain in-amp (G = 1–1000), two uncommitted op amps, and two matched 20 kΩ resistors in a single 4 mm × 4 mm LFCSP package. It delivers 8 nV/√Hz input voltage noise, 90 dB min CMRR at G = 1, 1.2 MHz −3 dB bandwidth, ±2.3 V to ±18 V dual-supply operation, and supports industrial temperature range (−40°C to +85°C). It is used in high-accuracy Wheatstone bridge signal conditioning for strain gage interfaces.
For engineers reviewing the AD8295BCPZ-R7 datasheet, AD8295BCPZ-R7 pinout, AD8295BCPZ-R7 application, or AD8295BCPZ-R7 equivalent, key selection criteria include its integrated resistor-matched signal chain, differential output capability, RTI offset voltage ≤120 μV (A grade), gain error ≤0.05% at G = 1, and routing-friendly LFCSP layout without thermal slug.
Technical Context
The AD8295BCPZ-R7 implements a three-op-amp instrumentation amplifier architecture with external gain-setting via RG pins, enabling precise gain control from 1 to 1000. Its internal 20 kΩ matched resistor network feeds Op Amp A1's inverting input, supporting accurate G = −1 or G = 2 configurations without external components.
It features fully specified differential output operation, dual independent op amps (A1 with built-in 2:1 divider, A2 standard), and rail-to-rail input common-mode range extending to within 1.9 V of supplies. All functions operate across −40°C to +125°C junction temperature, with performance guaranteed over −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 1000, set by single external resistor - enables flexible front-end scaling without redesigning feedback networks. |
| Input Voltage Noise | 8 nV/√Hz max at 1 kHz - ensures minimal added noise in low-level sensor signal amplification (e.g., microvolt-level bridge outputs). |
| CMRR (G = 1) | 90 dB min (DC to 60 Hz) - rejects large common-mode interference while preserving small differential signals in noisy industrial environments. |
| −3 dB Bandwidth | 1.2 MHz at G = 1 - supports fast transient response in data acquisition systems sampling up to ~200 kSPS with adequate settling. |
| Input Offset Voltage | 120 μV max (A grade, TA = 25°C) - enables sub-0.1% accuracy in 100 mV full-scale bridge measurements without trimming. |
| Supply Range | ±2.3 V to ±18 V - accommodates legacy ±15 V systems and low-voltage ±2.5 V designs without level-shifting circuitry. |
| Package | 16-lead LFCSP_VQ (4 mm × 4 mm, no exposed thermal pad) - maximizes PCB routing area beneath device for dense mixed-signal layouts. |
Pinout & Package
AD8295BCPZ-R7 uses a 16-lead LFCSP_VQ package (4 mm × 4 mm, 0.5 mm pitch, no exposed thermal pad), optimized for compact routing and thermal isolation. Pin numbering follows standard top-view orientation with pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | In-amp negative input | Differential input node; connects directly to bridge leg or transducer terminal requiring high-impedance, low-bias sensing. |
| 2,3 (RG) | Gain-setting resistor terminals | Accepts single external resistor to program gain from 1 to 1000; open-circuit defaults to G = 1. |
| 4 (+IN) | In-amp positive input | Differential input node; paired with Pin 1 for balanced signal acquisition with >100 GΩ input impedance. |
| 5 (−VS) | Negative supply rail | Connects to negative analog supply; supports split-rail operation down to ±2.3 V for ultra-low-power systems. |
| 6 (REF) | Reference input/output | Defines output common-mode level; driven externally for level-shifting or left floating for single-ended output at mid-supply. |
| 7 (A1 OUT) | Op Amp A1 output | Output of first uncommitted op amp; internally connected to R1/R2 divider for precision G = −1 or G = 2 configurations. |
| 8 (A1 R2) | R2 terminal of internal divider | Midpoint connection of 20 kΩ matched resistor pair; enables accurate gain stages without external matching components. |
| 9 (A1 −IN) | A1 inverting input | Connected internally to R1/R2 junction; used with A1 +IN (Pin 11) to configure buffered difference or reference buffer. |
| 10 (A1 R1) | R1 terminal of internal divider | Completes 20 kΩ matched resistor network; ensures <0.03% matching and <1 ppm/°C tracking for stable gain accuracy. |
| 11 (A1 +IN) | A1 noninverting input | Independent op amp input; accepts external signal for post-amplification, filtering, or reference buffering. |
| 12 (A2 OUT) | Op Amp A2 output | Output of second general-purpose op amp; usable as active filter stage, ADC driver, or output buffer with 2 V/μs slew rate. |
| 13 (A2 −IN) | A2 inverting input | Standard op amp inverting node; supports configurable gain, integration, or current-to-voltage conversion. |
| 14 (A2 +IN) | A2 noninverting input | Standard op amp noninverting node; used for unity-gain buffers or high-Z signal routing. |
| 15 (OUT) | In-amp main output | Differential-capable output; supports single-ended or true differential drive into ADC inputs with matched output impedance. |
| 16 (+VS) | Positive supply rail | Connects to positive analog supply; complements Pin 5 for symmetrical or asymmetrical dual-supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated matched 20 kΩ resistors | 0.03% matching and 1 ppm/°C tracking enable precision G = −1 or G = 2 stages without external trimming or calibration. |
| Differential output configuration | Fully characterized differential mode supports direct interface to differential-input SAR or delta-sigma ADCs, reducing EMI susceptibility. |
| No thermal slug in LFCSP | Eliminates solder void risk and frees PCB layer space under device for high-density routing or ground plane continuity. |
| Wide supply range (±2.3 V to ±18 V) | Operates across legacy industrial ±15 V rails and modern low-voltage ±2.5 V systems without external regulators or level shifters. |
| Two uncommitted op amps | Op Amp A1 (with internal divider) and Op Amp A2 provide on-chip signal processing - eliminating 4–6 discrete components per channel. |
Applications
| Wheatstone Bridge Signal Conditioning | Precision Medical Sensor Front End |
|---|---|
Use Scenario: Amplifying low-level differential output (1–10 mV) from load cell or pressure transducer bridges in factory automation systems. IC Role / Device Role / Timing Role: Primary instrumentation amplifier with integrated gain-setting and matched resistors; provides RTI noise ≤8 nV/√Hz and CMRR ≥90 dB to extract weak signals from 10 V common-mode interference. Use Value: Eliminates external gain-resistor matching and reduces board area by 40% vs. discrete in-amp + op amp solutions, while maintaining 0.05% gain accuracy at G = 1. | Use Scenario: Biopotential acquisition (ECG, EMG) requiring high CMRR, low noise, and DC-coupled signal path in portable diagnostic devices. IC Role / Device Role / Timing Role: Front-end in-amp with differential output drives 16-bit+ ADC; op amps condition reference and filter signals on same die to minimize inter-stage drift. Use Value: Integrated 20 kΩ resistors ensure <0.3 ppm/°C gain drift, enabling stable baseline over body-temperature variations without recalibration. |
| Industrial Data Acquisition Channel | Strain Gage Interface Module |
Use Scenario: Modular DAQ system channel card acquiring 4–8 analog inputs with programmable gain and anti-alias filtering. IC Role / Device Role / Timing Role: Signal-chain hub: in-amp sets gain, Op Amp A2 implements 2-pole Sallen-Key low-pass filter, REF pin sets ADC input common-mode. Use Value: Single-chip solution replaces 3 ICs (in-amp + 2 op amps) and 6 precision resistors, cutting BOM cost by ~35% and improving thermal tracking between stages. | Use Scenario: Embedded controller measuring mechanical stress via 350 Ω or 1 kΩ foil strain gages in structural health monitoring nodes. IC Role / Device Role / Timing Role: Precision in-amp with G = 100–500 configured via RG; matched internal resistors eliminate gain error from external tolerance stack-up. Use Value: 0.1% gain error max at G = 100 enables ±0.05% full-scale measurement accuracy without per-unit calibration, reducing test time and NRE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | Single high-precision in-amp only (no op amps or resistors); 10 nV/√Hz noise; MSOP-8 package. | Lacks integrated signal processing blocks - requires external op amps and gain resistors for equivalent functionality. | Choose when only in-amp function is needed and board space allows discrete support components. |
| AD8422ACPZ-R7 | Higher precision (5 nV/√Hz, 0.0005% gain error), but no integrated op amps or resistors; 16-lead LFCSP same footprint. | Requires full external signal chain; superior noise/accuracy trade-off but higher component count and layout complexity. | Prefer for metrology-grade systems where ultimate noise and drift performance outweigh integration benefits. |
Compared with AD8221ARMZ and AD8422ACPZ-R7, the AD8295BCPZ-R7 trades marginal noise/accuracy degradation for significant system-level simplification: it integrates two op amps and matched resistors, reducing component count by ≥7 parts per channel and eliminating resistor matching tolerances in critical gain paths.
Availability
AD8295BCPZ-R7 is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and precision data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD8295BCPZ-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 Wilmington, MA.
The AD8295BCPZ-R7 belongs to Analog Devices' precision instrumentation amplifier product line, designed specifically to reduce system complexity in sensor signal chains by integrating matched resistors and auxiliary op amps alongside the core in-amp.
FAQ
What is the maximum operating temperature range for the AD8295BCPZ-R7?
The AD8295BCPZ-R7 operates over −40°C to +125°C junction temperature. Specified performance (including gain error, CMRR, and offset) is guaranteed from −40°C to +85°C. Data sheets confirm functional operation up to +125°C, with typical characteristics provided through that range in the "Typical Performance Characteristics" section.
Does the AD8295BCPZ-R7 support differential output configuration?
Yes, the AD8295BCPZ-R7 supports fully specified differential output operation. The output stage is characterized for differential mode in Figure 65 and Table 2 of the datasheet, with matched bandwidth (1.2 MHz at G = 1), settling time, and CMRR performance. Pins 15 (OUT) and 6 (REF) form the differential pair when REF is actively driven.
How is gain set on the AD8295BCPZ-R7, and what is the default gain?
Gain on the AD8295BCPZ-R7 is set by connecting a single external resistor between Pins 2 and 3 (RG terminals), using G = 1 + (49.4 kΩ / RG). With RG open-circuited, the device defaults to G = 1. Standard 1% resistor values achieve gains from 1.99 to 991, as tabulated in Table 9 of the datasheet.
What are the key advantages of the internal 20 kΩ matched resistors in the AD8295BCPZ-R7?
The internal 20 kΩ matched resistors in the AD8295BCPZ-R7 provide 0.03% matching and 1 ppm/°C tracking, enabling precision G = −1 or G = 2 configurations using Op Amp A1 without external components. This eliminates resistor tolerance-induced gain error and improves thermal stability over discrete implementations.
Can the AD8295BCPZ-R7 be used with single-supply operation?
Yes, the AD8295BCPZ-R7 supports single-supply operation. Its input common-mode range extends to within 1.9 V of either rail, and the REF pin allows output level-shifting. For example, with +VS = 5 V and −VS = 0 V, driving REF to 2.5 V configures the output for rail-to-rail swing around midscale, compatible with single-ended ADC inputs.
AD8295BCPZ-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:
- 3
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- 1.2 MHz
- Current - Input Bias:
- 200 pA
- Voltage - Input Offset:
- 60 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)
AD8295BCPZ-R7 FAQ
1.How can I place an order for AD8295BCPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8295BCPZ-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 AD8295BCPZ-R7 reliable?
The price and inventory of AD8295BCPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8295BCPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8295BCPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8295BCPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8295BCPZ-R7?
AD8295BCPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8295BCPZ-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 AD8295BCPZ-R7?
For technical support, including AD8295BCPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8295BCPZ-R7 requirements.
6.How does Aetrix verify that AD8295BCPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8295BCPZ-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 AD8295BCPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8295BCPZ-R7?
All AD8295BCPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8295BCPZ-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 AD8295BCPZ-R7 part is unused and in its original packaging.
Return procedure for AD8295BCPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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