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Analog Devices Inc. AD8275BRMZ-R7
- Part No.:
- AD8275BRMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8275BRMZ-R7.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
AD8275BRMZ-R7 from Analog Devices is a G = 0.2 precision difference amplifier designed as a level-translating ADC driver for ±10 V industrial signals into +4 V single-supply ADC ranges. It delivers 450 ns settling to 0.001%, 80 dB CMRR, rail-to-rail output swing, and drives 16-bit SAR ADCs such as AD7685 in data acquisition front ends.
For engineers reviewing the AD8275BRMZ-R7 datasheet, AD8275BRMZ-R7 pinout, AD8275BRMZ-R7 application, or AD8275BRMZ-R7 equivalent, key selection criteria include input overvoltage tolerance (±35 V to ±40 V), low gain drift (1 ppm/°C), reference configuration flexibility (shared/split REF1/REF2), and fast settling under capacitive load.
Technical Context
The AD8275BRMZ-R7 implements a laser-trimmed subtractor topology with integrated 50 kΩ/20 kΩ resistor networks to achieve precise 0.2 gain and high common-mode rejection. Its internal 2.5 V bias and complementary input stage extend the input common-mode range beyond supply rails without crossover distortion.
It operates from +3.3 V to +15 V single supply or ±2.5 V dual supply, supports differential-to-single-ended conversion, and features adaptive output stage current sourcing/sinking to suppress kickback from SAR ADC switched-capacitor inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | G = 0.2 (fixed attenuation ratio for ±10 V → +4 V translation) |
| Settling Time | 450 ns to 0.001% (enables sampling with medium-speed 16-bit SAR ADCs) |
| CMRR | 80 dB minimum (rejects common-mode noise in industrial sensor interfaces) |
| Input Overvoltage | +40 V to −35 V (VS = 5 V) - protects against transients without external clamping) |
| Rail-to-Rail Output | Swings within 48 mV of −VS and 100 mV of +VS (maximizes dynamic range into 4 V ADC full scale) |
| Gain Drift | 1 ppm/°C (ensures stable scaling across −40°C to +85°C industrial temperature range) |
| Supply Range | +3.3 V to +15 V (supports wide-system voltage compatibility including 3.3 V and 5 V logic domains) |
Pinout & Package
AD8275BRMZ-R7 is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained industrial PCB layouts and thermal performance (θJA = 135°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF1 | Reference Input | Sets lower reference level; tied to GND or bias point in split-reference configurations |
| 2 - −IN | Inverting Input | Accepts negative-side signal; ESD-protected to ±35 V/±40 V relative to supplies |
| 3 - +IN | Noninverting Input | Accepts positive-side signal; matched impedance with −IN enables high CMRR |
| 4 - −VS | Negative Supply | Ground reference in single-supply operation; must be connected for proper biasing |
| 5 - SENSE | Output Sense Feedback | Must be shorted to OUT pin to enable force-sense output regulation and minimize load-induced errors |
| 6 - OUT | Amplified Output | Drives ADC input directly; rail-to-rail swing supports full-scale utilization of 4 V ADC references |
| 7 - +VS | Positive Supply | Primary power rail; bypass with 0.1 µF ceramic + 10 µF tantalum per datasheet layout guidelines |
| 8 - REF2 | Reference Input | Sets upper reference level; tied to VREF or mid-supply in shared/split configurations |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Precision Resistor Network | Laser-trimmed 50 kΩ/20 kΩ ratios ensure 0.024% gain error and <3 ppm gain nonlinearity |
| Extended Input Voltage Range | −12.3 V to +12 V common-mode (VS = 5 V) enables direct interface to ±10 V sensors without attenuators |
| Fast Settling Under Load | 450 ns to 0.001% with 100 pF capacitive load - meets timing budgets of 1 MSPS+ SAR ADCs |
| Low Offset Drift | 2.5 µV/°C - maintains DC accuracy across temperature in precision measurement systems |
| Single-Supply Operation | Operates from +3.3 V - reduces system power and eliminates need for negative rail in portable instrumentation |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Conditioning ±10 V analog outputs from PLC I/O modules, strain gauge bridges, or thermocouple signal conditioners before digitization. IC Role / Device Role / Timing Role: Level translator and ADC driver that converts bipolar industrial signals to unipolar 0–4 V range compatible with 16-bit SAR ADCs like AD7685. Use Value: Eliminates external resistive dividers and op-amp stages, reducing component count, board area, and calibration drift while maintaining 16-bit linearity. | Use Scenario: Front-end signal conditioning for programmable voltage/current sources and DMMs requiring accurate ±10 V range support. IC Role / Device Role / Timing Role: High-CMRR difference amplifier driving multiplexed ADC channels with fast settling to meet ATE throughput requirements. Use Value: 450 ns settling time and low THD (−112 dB) enable >1 MSPS effective sampling rates without aperture jitter degradation. |
| Instrumentation Amplifier Building Block | High-Voltage Sensor Interface |
Use Scenario: Serving as the gain-and-level-shift stage in modular instrumentation amplifiers for medical or scientific equipment. IC Role / Device Role / Timing Role: Precision G = 0.2 attenuator with user-configurable reference pins (REF1/REF2) enabling flexible output offset control. Use Value: Laser-trimmed resistors and 1 ppm/°C gain drift ensure long-term stability in calibrated instruments without periodic recalibration. | Use Scenario: Interfacing high-voltage battery monitoring circuits (e.g., 400 V EV packs) where isolated ±10 V sensor outputs feed centralized DAQ units. IC Role / Device Role / Timing Role: Robust front-end amplifier with ±35 V input overvoltage protection and rail-to-rail output for safe integration into safety-critical systems. Use Value: Input ESD diodes clamp transients up to ±40 V, eliminating need for external TVS devices and simplifying isolation barrier design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8270ARMZ-R7 | G = 1, 10, 100 selectable; no built-in level translation; requires external REF | Better for high-gain sensor amplification, not direct ±10 V → +4 V translation | Select when variable gain and higher CMRR (100 dB) are needed, but level-shifting must be implemented separately. |
| INA149IDR | G = 1; ±200 V input common-mode range; no integrated REF pins; higher supply current (1.2 mA vs. 2.3 mA) | Superior for ultra-high common-mode rejection in motor drive current sensing, not optimized for ADC driver settling | Choose for >100 V common-mode applications where AD8275BRMZ-R7's ±35 V rating is insufficient. |
Compared with AD8275BRMZ-R7, AD8270ARMZ-R7 offers programmable gain but lacks integrated level translation, while INA149IDR provides wider common-mode range at the cost of slower settling and no on-chip reference architecture - making AD8275BRMZ-R7 uniquely suited for precision 16-bit ADC interfacing with ±10 V inputs.
Availability
AD8275BRMZ-R7 is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, instrumentation amplifier modules, and high-voltage sensor interface designs requiring stable component supply and guaranteed long-term availability.
Supply support for AD8275BRMZ-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 AD8275BRMZ-R7 belongs to Analog Devices' precision difference amplifier product line, engineered specifically for industrial signal conditioning and 16-bit+ data acquisition systems requiring accurate level translation and fast settling.
FAQ
What is the primary function of the AD8275BRMZ-R7 in a signal chain?
The AD8275BRMZ-R7 functions as a G = 0.2 precision difference amplifier that translates ±10 V industrial signals to a +4 V unipolar range compatible with single-supply 16-bit SAR ADCs. Its integrated laser-trimmed resistors, rail-to-rail output, and 450 ns settling time make AD8275BRMZ-R7 ideal for high-accuracy data acquisition front ends without external gain/level-shift components.
Can the AD8275BRMZ-R7 operate from a 3.3 V supply?
Yes, the AD8275BRMZ-R7 supports a wide operating voltage range from +3.3 V to +15 V. At 3.3 V, it maintains rail-to-rail output swing (within 48 mV of −VS and 100 mV of +VS), 80 dB CMRR, and 450 ns settling - enabling compact, low-power industrial sensors and portable instrumentation using AD8275BRMZ-R7 without voltage translation.
How should REF1 and REF2 be configured for a ±10 V to 4.096 V ADC interface?
For ±10 V to 4.096 V translation, configure REF1 to GND and REF2 to 4.096 V (split-reference mode). This sets the output midpoint to 2.048 V, allowing the AD8275BRMZ-R7 to map −10 V → +0.048 V and +10 V → +4.048 V - fully utilizing the 4.096 V ADC reference range. The AD8275BRMZ-R7 datasheet Figure 2 confirms this exact configuration.
Does the AD8275BRMZ-R7 require external resistors for gain setting?
No. The AD8275BRMZ-R7 integrates precision laser-trimmed 50 kΩ and 20 kΩ resistors to fix the gain at exactly G = 0.2. No external gain-setting components are needed - eliminating matching errors, temperature drift, and board space associated with discrete resistor networks. This internal architecture is a core feature of the AD8275BRMZ-R7 design.
What is the purpose of the SENSE pin on the AD8275BRMZ-R7?
Pin 5 (SENSE) on the AD8275BRMZ-R7 is a force-sense feedback terminal that must be shorted to the OUT pin. This connection enables Kelvin sensing to compensate for voltage drop across PCB traces or load connections, ensuring the AD8275BRMZ-R7 regulates its output voltage precisely at the load - critical for maintaining 16-bit accuracy when driving ADC inputs through series resistance or long traces.
AD8275BRMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 25V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 15 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1.9mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3.3 V
- Voltage - Supply Span (Max):
- 15 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8275BRMZ-R7 FAQ
1.How can I place an order for AD8275BRMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8275BRMZ-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 AD8275BRMZ-R7 reliable?
The price and inventory of AD8275BRMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8275BRMZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8275BRMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8275BRMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8275BRMZ-R7?
AD8275BRMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8275BRMZ-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 AD8275BRMZ-R7?
For technical support, including AD8275BRMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8275BRMZ-R7 requirements.
6.How does Aetrix verify that AD8275BRMZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8275BRMZ-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 AD8275BRMZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8275BRMZ-R7?
All AD8275BRMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8275BRMZ-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 AD8275BRMZ-R7 part is unused and in its original packaging.
Return procedure for AD8275BRMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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