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Analog Devices Inc. AD8273ARZ
- Part No.:
- AD8273ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8273ARZ.pdf
- Description:
- IC AUDIO 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:278
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Product details
Overview
AD8273ARZ from Analog Devices is a dual-channel, high-precision difference amplifier with integrated laser-trimmed resistors, configured for gains of ½ or 2 (−6 dB or +6 dB), delivering 0.00025% THD+N at 20 kHz and driving 600 Ω loads - used in high-fidelity ADC driver and instrumentation amplifier applications.
For engineers reviewing the AD8273ARZ datasheet, AD8273ARZ pinout, AD8273ARZ application, or AD8273ARZ equivalent, key selection criteria include guaranteed 77 dB CMRR, ±4000 V HBM ESD rating, 20 V/μs slew rate, and operation across ±2.5 V to ±18 V supplies with industrial −40°C to +85°C temperature range.
Technical Context
The AD8273ARZ implements two independent, matched-resistor-based amplifier channels using internal 12 kΩ and 6 kΩ laser-trimmed thin-film resistors to achieve 0.05% max gain error and 10 ppm/°C max gain drift. Its architecture supports difference, inverting, and noninverting configurations without external components.
Each channel features rail-to-rail output swing limited by ±VS ±1.5 V, 800 ns to 0.01% settling time, and 20 MHz bandwidth at G = ½. Input common-mode range extends to ±3VS − 4.5 V, enabling wide dynamic signal capture in unbalanced supply setups up to 36 V total supply differential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | G = ½ (−6 dB) or G = 2 (+6 dB); fixed via internal trimmed resistors, no external components required |
| THD + N | 0.00025% at 20 kHz, 10 Vp-p, 600 Ω load - enables low-distortion audio and precision measurement signal chains |
| CMRR | 77 dB minimum (referred to input, VCM = ±40 V) - ensures accurate differential signal extraction in noisy environments |
| Slew Rate | 20 V/μs minimum - supports fast transient response in high-speed data acquisition systems |
| Supply Range | ±2.5 V to ±18 V - accommodates both low-voltage portable and high-voltage industrial power rails |
| Offset Voltage | 700 μV maximum (referred to output) - maintains dc accuracy in sensor interface and level-shifting circuits |
| Settling Time | 800 ns to 0.01% (10 V step, CL = 100 pF) - meets timing requirements for multiplexed high-resolution ADC drivers |
Pinout & Package
AD8273ARZ is housed in a 14-lead SOIC_N (narrow-body) package per JEDEC MS-012-AB, with 1.27 mm pitch, 8.75 mm × 4.00 mm body, and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | NC | No connect - must remain unconnected per datasheet; not internally bonded |
| 2 (−INA) | Inverting Input A | Connects to 12 kΩ resistor network for Channel A difference/inverting configuration |
| 3 (+INA) | Noninverting Input A | Connects to 12 kΩ resistor network for Channel A difference/noninverting configuration |
| 4 (−VS) | Negative Supply | Reference for negative rail; supports dual or single-supply operation down to −2.5 V |
| 5 (+INB) | Noninverting Input B | Connects to 12 kΩ resistor network for Channel B difference/noninverting configuration |
| 6 (−INB) | Inverting Input B | Connects to 12 kΩ resistor network for Channel B difference/inverting configuration |
| 8 (REFB) | Reference B | 6 kΩ resistor node tied to positive terminal of Op Amp B - sets gain and common-mode bias point |
| 9 (OUTB) | Output B | Amplified output of Channel B; drives 600 Ω loads with 20 V/μs slew rate |
| 10 (SENSEB) | Sense B | 6 kΩ resistor node tied to negative terminal of Op Amp B - completes feedback path for gain setting |
| 11 (+VS) | Positive Supply | Reference for positive rail; supports up to +18 V; bypassing with 0.1 μF + 10 μF recommended |
| 12 (SENSEA) | Sense A | 6 kΩ resistor node tied to negative terminal of Op Amp A - completes feedback path for Channel A gain |
| 13 (OUTA) | Output A | Amplified output of Channel A; fully independent from Channel B with >130 dB channel separation |
| 14 (REFA) | Reference A | 6 kΩ resistor node tied to positive terminal of Op Amp A - sets gain and common-mode bias for Channel A |
Key Features
| Feature | Design Value |
|---|---|
| Integrated precision resistor network | Laser-trimmed 12 kΩ/6 kΩ ratios enable 0.05% max gain error and 10 ppm/°C max drift - eliminates discrete resistor matching effort |
| Dual independent channels | 130 dB channel separation at 1 kHz ensures minimal crosstalk in multi-signal monitoring systems |
| High ESD robustness | ±4000 V HBM rating protects against handling damage during PCB assembly and field service |
| Flexible supply operation | Operates on ±2.5 V to ±18 V or unbalanced rails (e.g., 0 V/20 V) with ≤36 V total differential - simplifies system power architecture |
| Low-noise, low-distortion performance | 26 nV/√Hz input voltage noise density and 0.00025% THD+N at 20 kHz support 24-bit ADC interfaces and professional audio paths |
Applications
| ADC Drivers | High-Performance Audio |
|---|---|
Use Scenario: Driving SAR or delta-sigma ADC inputs in precision data acquisition systems requiring full-scale analog signals with minimal distortion and offset error. IC Role / Device Role / Timing Role: Difference amplifier configured at G = ½ to condition differential sensor outputs while rejecting common-mode noise before digitization. Use Value: 77 dB CMRR and 0.00025% THD+N preserve SNR and ENOB in 18–24-bit converter systems operating up to 100 kHz. | Use Scenario: Line-level signal conditioning in studio-grade audio interfaces, active crossovers, and digital mixing consoles. IC Role / Device Role / Timing Role: Dual-channel inverting amplifier (G = 2) providing balanced gain staging with ultra-low harmonic distortion. Use Value: 0.0015% THD+N at 100 kHz and 20 V/μs slew rate ensure transparent signal reproduction without audible artifacts. |
| Instrumentation Amplifier Building Blocks | Level Translators |
Use Scenario: Front-end gain stage in modular instrumentation amplifiers where matched gain and CMRR are critical for sensor bridge readout. IC Role / Device Role / Timing Role: Precision difference amplifier (G = 2) with internal resistor matching used as first-stage gain element before programmable gain or filtering. Use Value: 10 ppm/°C gain drift and 700 μV max offset voltage minimize calibration frequency and improve long-term measurement stability. | Use Scenario: Translating ±10 V industrial sensor outputs to 0–5 V or ±2.5 V ranges compatible with microcontroller ADCs or FPGA I/O banks. IC Role / Device Role / Timing Role: Noninverting amplifier (G = 1.5 or 3) with REFA/REFB pins biased to set output common-mode level. Use Value: Input common-mode range extending to ±3VS − 4.5 V allows direct interfacing with high-voltage transducers without external level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8274ARZ | Single-channel version; identical gain options, THD+N, and resistor matching specs but half the channel count and supply current | Suitable for space-constrained or single-signal-path designs where dual-channel capability is unnecessary | Select AD8274ARZ when only one high-precision difference amplifier is needed and board area or power budget is constrained |
| INA149IDR | Higher CMRR (100 dB min), wider input common-mode range (±270 V), but higher THD+N (0.002% at 1 kHz) and no G = ½ option | Better suited for high-voltage isolation amplifier front-ends and industrial motor control current sensing | Choose INA149IDR when extreme common-mode rejection or high-voltage tolerance (>±40 V) is required over ultra-low distortion |
Compared with AD8273ARZ, AD8274ARZ reduces channel count and power use while preserving precision, whereas INA149IDR trades distortion performance for vastly superior CMRR and input voltage range - making each optimal for distinct signal conditioning priorities.
Availability
AD8273ARZ is available at Aetrix Electronics and suitable for precision ADC driver, high-fidelity audio signal chain, and instrumentation amplifier building block applications requiring stable component supply across industrial temperature and voltage ranges.
Supply support for AD8273ARZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD8273ARZ belongs to Analog Devices' precision amplifier product line, designed specifically for low-distortion, high-accuracy differential signal conditioning in test equipment, medical instrumentation, and audio systems.
FAQ
What gain configurations does the AD8273ARZ support without external components?
The AD8273ARZ supports four standard configurations without external components: difference amplifier (G = ½ or 2), inverting amplifier (G = ½ or 2), and noninverting amplifier (G = 1.5 or 3). These rely on its internal laser-trimmed 12 kΩ and 6 kΩ resistor networks. All configurations maintain 0.05% max gain error and 10 ppm/°C max gain drift. The AD8273ARZ datasheet Figure 39–46 details wiring for each mode using only the specified pin connections.
Can the AD8273ARZ operate on single-supply rails, and what are the limitations?
Yes, the AD8273ARZ operates on single-supply rails such as 0 V and +20 V, provided the total supply differential remains ≤36 V. Input common-mode range extends to −3VS + 4.5 V and +3VS − 4.5 V, so with +20 V/0 V supplies, usable input range is approximately −1.5 V to +15.5 V. Output swing is limited to −VS + 1.5 V to +VS − 1.5 V, meaning 1.5 V to 18.5 V in this case. The AD8273ARZ requires proper reference biasing at REFA/REFB pins for single-supply operation.
What is the maximum capacitive load the AD8273ARZ can drive at G = 2?
The AD8273ARZ can drive up to 1200 pF capacitive load at G = 2 while maintaining stability, as confirmed in the datasheet's "Capacitive Load Drive" specification table. This exceeds typical op amp limits and enables direct connection to ADC input capacitors or long PCB traces without external isolation resistors. At G = ½, the limit is 200 pF. Performance degrades beyond these values, showing increased overshoot and settling time - see Figures 24–27 in the AD8273ARZ datasheet for detailed overshoot vs. capacitance curves.
How does the AD8273ARZ achieve its 0.00025% THD+N specification?
The AD8273ARZ achieves 0.00025% THD+N at 20 kHz through a combination of low-noise, high-slew-rate op amp cores (20 V/μs), tightly matched internal thin-film resistors (laser-trimmed to ratio match), and optimized layout minimizing parasitic capacitance at high-impedance nodes. Its internal architecture avoids external resistor mismatches that dominate distortion in discrete implementations. This specification is measured at 10 Vp-p into 600 Ω with ±15 V supplies - the AD8273ARZ maintains sub-0.0015% THD+N even at 100 kHz under same conditions.
Is the AD8273ARZ pin-compatible with other devices in the AD827x family?
No, the AD8273ARZ is not pin-compatible with other AD827x family members. While AD8274ARZ shares identical pinout and package (14-lead SOIC_N), AD8270 and AD8271 use different packages (8-lead SOIC and MSOP) and distinct pin functions. The AD8273ARZ pin configuration - including dedicated SENSEA/SENSEB, REFA/REFB, and dual-channel input/output assignments - is unique to its dual-channel, dual-gain architecture. Always verify pin mapping against the specific device's datasheet before substitution.
AD8273ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Programmable Gain
- Number of Circuits:
- 2
- Output Type:
- Single-Ended
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- -
- 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:
- 14-SOIC
AD8273ARZ FAQ
1.How can I place an order for AD8273ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8273ARZ 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 AD8273ARZ reliable?
The price and inventory of AD8273ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8273ARZ is usually 5 days.
3.What payment methods are accepted for AD8273ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8273ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8273ARZ?
AD8273ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8273ARZ 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 AD8273ARZ?
For technical support, including AD8273ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8273ARZ requirements.
6.How does Aetrix verify that AD8273ARZ is sourced from the original manufacturer or authorized distributors?
All AD8273ARZ 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 AD8273ARZ meets industry standards.
7.What is the process for return or replacement of AD8273ARZ?
All AD8273ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8273ARZ, 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 AD8273ARZ part is unused and in its original packaging.
Return procedure for AD8273ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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