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Analog Devices Inc. AD8270ACPZ-R7
- Part No.:
- AD8270ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WQFN Exposed Pad, CSP
- Datasheet:
-
AD8270ACPZ-R7.pdf
- Description:
- IC OPAMP DIFF 2 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,629
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Product details
Overview
AD8270ACPZ-R7 from Analog Devices is a precision dual-channel difference amplifier with integrated laser-trimmed resistors, configured as a high-accuracy gain-of-1 difference amplifier (G = 1) in its standard configuration. It delivers 15 MHz bandwidth, 30 V/µs slew rate, and 0.08% max gain error across −40°C to +85°C, enabling high-fidelity signal conditioning in industrial instrumentation and test equipment.
For engineers reviewing the AD8270ACPZ-R7 datasheet, AD8270ACPZ-R7 pinout, AD8270ACPZ-R7 application, or AD8270ACPZ-R7 equivalent, this page provides verified specifications, dual-channel pin mapping, gain-configuration flexibility (0.5/1/2), rail-to-rail input operation, and real-world use cases in level translation and encoder interfaces - all confirmed from Analog Devices Rev. A datasheet.
Technical Context
The AD8270ACPZ-R7 integrates two matched, low-distortion op amps with 14 on-die laser-trimmed thin-film resistors (ten 10 kΩ, four 20 kΩ), enabling precise internal gain setting without external components. Its architecture supports three fixed difference amplifier gains (0.5, 1, 2) and over 40 single-ended configurations via pin-strapping.
Each channel operates independently with ±2.5 V to ±18 V dual-supply support (or unbalanced supplies up to 36 V total), 2.5 mA per channel supply current, and true rail-to-rail input voltage range - achieved by internal resistor division that limits voltage seen by core op amps to ≤±1.5 V from rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | 0.08% max gain error ensures <±0.5 mV output error at 1 V input for G = 1, critical for precision measurement front-ends. |
| Bandwidth | 15 MHz at G = 1 enables accurate amplification of fast transients in automated test equipment and encoder signals. |
| Slew Rate | 30 V/µs supports clean 10 V step response in ≤800 ns (0.01% settling), essential for pulse-based sensor interfaces. |
| CMRR | 80 dB min (DC–1 kHz) rejects common-mode noise from motor drives or industrial power supplies. |
| Input Offset Drift | 10 ppm/°C max gain drift and 1.5 µV/°C max offset drift maintain calibration stability over full industrial temperature range. |
| Supply Range | ±2.5 V to ±18 V operation allows compatibility with legacy ±15 V systems and modern low-voltage ±5 V designs. |
| Package | 16-lead 4 mm × 4 mm LFCSP with exposed thermal pad tied to −VS - reduces board area by 50% vs. two discrete difference amps. |
Pinout & Package
AD8270ACPZ-R7 uses a 16-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad (EPAD) internally connected to −VS. The pad must be soldered to −VS plane for optimal thermal performance and mechanical reliability in high-vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 9, 10, 11, 12 |
Differential Input Resistors (10 kΩ each) | Four 10 kΩ resistors per channel connect to internal op amp inputs - enable configurable difference/single-ended topologies via pin wiring. |
| 5, 6, 7, 8 | Reference Resistors (20 kΩ each) | Four 20 kΩ resistors per channel set reference node; used for midsupply biasing or external reference injection in level-shifting applications. |
| 13, 16 | Power Supply Terminals | +VS (Pin 16) and −VS (Pin 13) power both channels; EPAD ties to −VS for thermal conduction and EMI reduction. |
| 14, 15 | Amplifier Outputs | OUTA (Pin 15) and OUTB (Pin 14) deliver buffered, low-impedance outputs capable of ±13.8 V swing into 2 kΩ load at ±15 V supplies. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Laser-Trimmed Resistor Network | 14 on-die resistors (10×10 kΩ, 4×20 kΩ) guarantee ratio matching and eliminate external component tolerance errors in gain-setting networks. |
| Configurable Gain Architecture | Hardware-selectable gains of 0.5, 1, or 2 for difference mode - no external resistors needed - reducing BOM count and layout sensitivity. |
| Rail-to-Rail Input Operation | Accepts input voltages from −VS − 0.4 V to +VS + 0.4 V (limited by ESD diodes), enabling direct interface with sensors operating near supply rails. |
| High Channel Isolation | ≥80 dB channel separation at 100 kHz prevents crosstalk between simultaneous measurements in dual-sensor systems like sine/cosine encoders. |
| Low Power per Channel | 2.5 mA max supply current per amplifier enables dual-channel precision amplification in thermally constrained or battery-backed modules. |
Applications
| Industrial Instrumentation | Level Translation |
|---|---|
|
Use Scenario: Amplifying low-level differential signals from strain gauges or RTD bridges in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Dual-channel difference amplifier conditioning two independent sensor channels simultaneously with matched gain and offset. Use Value: 0.08% gain error and 10 ppm/°C drift ensure <0.1% full-scale error over temperature - eliminating need for per-channel calibration. |
Use Scenario: Converting ±10 V industrial control signals to 0 V to 5 V range for ADC interfacing in data acquisition systems. IC Role / Device Role / Timing Role: Precision level shifter using G = 0.5 configuration referenced to midsupply (e.g., +2.5 V) to shift and scale bipolar inputs. Use Value: 15 MHz bandwidth preserves fast edge integrity during level shifting, avoiding distortion in PWM or pulse-width modulated control loops. |
| Automatic Test Equipment | Sine/Cosine Encoders |
|
Use Scenario: Front-end signal conditioning for high-speed parametric testing of semiconductor devices requiring sub-mV accuracy. IC Role / Device Role / Timing Role: Dual-channel difference amplifier capturing DUT voltage/current sense signals with synchronized sampling. Use Value: 30 V/µs slew rate and 800 ns 0.01% settling time enable accurate capture of transient responses within tight test cycle times. |
Use Scenario: Interfacing resolver or rotary encoder outputs where sine and cosine analog pairs require matched amplification before interpolation. IC Role / Device Role / Timing Role: Dual-channel amplifier processing sin(θ) and cos(θ) signals with identical gain and phase response across both channels. Use Value: ≥80 dB channel separation and <1.5 µV/°C offset drift preserve angular accuracy to <0.05° over temperature in motion control feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8273ARMZ | Single-channel, ±36 V supply range, higher CMRR (90 dB min), but no internal gain selection - requires external resistors. | Better suited for high-common-mode-voltage industrial bus monitoring (e.g., motor phase currents), not dual-channel space-constrained designs. | Select AD8273ARMZ when input CMV exceeds ±15 V or when absolute maximum CMRR is prioritized over channel density. |
| INA149IDR | Single-channel, 200 V/V fixed gain, 100 dB CMRR, 1.5 MHz bandwidth - lower speed, higher precision, no gain flexibility. | Ideal for high-accuracy unidirectional current sensing where gain is fixed and bandwidth <2 MHz suffices. | Choose INA149IDR only for single-ended, ultra-high-CMRR applications where AD8270ACPZ-R7's dual-channel capability and configurability are unnecessary. |
Compared with AD8273ARMZ and INA149IDR, AD8270ACPZ-R7 uniquely combines dual-channel integration, hardware-selectable gains (0.5/1/2), and 15 MHz bandwidth in a 4 mm × 4 mm footprint - making it optimal for space-limited, multi-signal industrial I/O modules requiring matched performance across channels.
Availability
AD8270ACPZ-R7 is available at Aetrix Electronics and suitable for industrial instrumentation, automatic test equipment, and motion control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD8270ACPZ-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 AD8270ACPZ-R7 belongs to Analog Devices' precision difference amplifier product line, designed specifically for high-density, high-accuracy signal conditioning in industrial automation, test & measurement, and encoder interface applications.
FAQ
What is the standard gain configuration of AD8270ACPZ-R7?
The AD8270ACPZ-R7 is not pre-configured to a fixed gain; it supports hardware-selectable difference amplifier gains of 0.5, 1, or 2 via external pin wiring. In its most commonly implemented configuration, AD8270ACPZ-R7 is used at G = 1 with pins 1 and 2 shorted to ground and pins 3 and 4 connected to differential inputs - delivering 0.08% max gain error and 15 MHz bandwidth.
Does AD8270ACPZ-R7 require external resistors for basic difference amplifier operation?
No, AD8270ACPZ-R7 does not require external resistors for standard difference amplifier operation. It integrates 14 laser-trimmed thin-film resistors (ten 10 kΩ, four 20 kΩ) to implement gains of 0.5, 1, or 2 directly. External resistors are only needed for nonstandard single-ended configurations beyond the 40+ supported by internal networks.
What is the role of the exposed thermal pad on AD8270ACPZ-R7?
The exposed thermal pad (EPAD) on AD8270ACPZ-R7 is internally connected to −VS and must be soldered to a −VS copper plane on the PCB. This improves thermal dissipation (reducing θJA from 96°C/W to 57°C/W), enhances mechanical reliability in vibration-prone environments, and lowers EMI susceptibility - especially critical in high-precision industrial signal chains.
Can AD8270ACPZ-R7 operate on single-supply rails?
Yes, AD8270ACPZ-R7 supports single-supply operation (e.g., +5 V and GND) as long as the total supply voltage remains ≤36 V and the negative rail is not driven below −0.3 V. For single-supply use, reference pins (REF1A/REF2A/etc.) are typically tied to midsupply (e.g., +2.5 V) to establish proper common-mode operating point for rail-to-rail input functionality.
How does AD8270ACPZ-R7 achieve rail-to-rail input capability despite internal op amp limitations?
AD8270ACPZ-R7 achieves rail-to-rail input operation through internal resistor division: input signals are attenuated by on-die 10 kΩ networks before reaching the core op amps, limiting their input voltage to ≤±1.5 V from either supply rail. This allows the device to accept inputs from −VS − 0.4 V to +VS + 0.4 V while protecting internal amplifiers - confirmed in Figure 7–12 of the AD8270ACPZ-R7 datasheet.
AD8270ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Programmable Gain
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 450 µV
- Current - Supply:
- 2.3mA (x2 Channels)
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP (4x4)
AD8270ACPZ-R7 FAQ
1.How can I place an order for AD8270ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8270ACPZ-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 AD8270ACPZ-R7 reliable?
The price and inventory of AD8270ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8270ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8270ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8270ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8270ACPZ-R7?
AD8270ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8270ACPZ-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 AD8270ACPZ-R7?
For technical support, including AD8270ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8270ACPZ-R7 requirements.
6.How does Aetrix verify that AD8270ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8270ACPZ-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 AD8270ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8270ACPZ-R7?
All AD8270ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8270ACPZ-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 AD8270ACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8270ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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