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Analog Devices Inc. AD8293G160ARJZ-R7
- Part No.:
- AD8293G160ARJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
AD8293G160ARJZ-R7.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,503
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Product details
Overview
AD8293G160ARJZ-R7 from Analog Devices is a precision zero-drift instrumentation amplifier with fixed gain of 160, integrated filter resistors (R1 = 4 kΩ, R2 = 320 kΩ, R3 = 5 kΩ), rail-to-rail output, and 0.7 μVp-p (0.01 Hz to 10 Hz) input-referred noise. It operates from 1.8 V to 5.5 V single supply and delivers 140 dB typical CMR for high-accuracy current sensing in portable medical instruments.
For engineers reviewing the AD8293G160ARJZ-R7 datasheet, AD8293G160ARJZ-R7 pinout, AD8293G160ARJZ-R7 application, or AD8293G160ARJZ-R7 equivalent, this page provides verified technical context, validated pin functions, confirmed filter architecture, real-world use-value metrics, and two rigorously cross-checked alternative parts for strain gauge and thermocouple amplifier designs.
Technical Context
The AD8293G160ARJZ-R7 uses a current-mode correction topology with internal auto-zeroing, enabling continuous offset correction at 60 kHz and eliminating 1/f noise dominance below 10 Hz. Its dual-output structure-OUT (direct amplifier output) and ADC OUT (5 kΩ series resistor)-supports antialiasing filtering without external gain-setting components.
It integrates all three filter resistors (R1, R2, R3) and achieves 500 Hz system bandwidth using only two external capacitors (C2 = 680 pF, C3 = 39 nF). The buffered REF pin draws just 0.01 nA, permitting direct connection to resistor dividers or low-noise references without CMR degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 160 - eliminates external gain resistors and associated matching errors |
| Input Offset Voltage (B Grade) | 3 μV max - enables sub-100 μV total error in 10 mV full-scale current-sense applications |
| Offset Drift | 0.3 μV/°C max - ensures <1.5 μV drift over 0°C to 70°C industrial range |
| Noise (0.01–10 Hz) | 0.7 μVp-p - supports dc-coupled thermocouple amplification without baseline wander |
| CMR | 140 dB typical - rejects >100 V common-mode interference in motor-current feedback loops |
| Supply Range | 1.8 V to 5.5 V - compatible with Li-ion battery-powered portable ECG front-ends |
| Output Drive | Rail-to-rail - delivers full 0–5 V swing into 10 kΩ load for direct ADC interfacing |
Pinout & Package
AD8293G160ARJZ-R7 is housed in an 8-lead halogen-free, Pb-free SOT-23 (RJ-8) package with 0.65 mm pitch and 2.90 mm × 1.60 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting input terminal | True differential input node; accepts −1.7 V to VCC − 1.7 V common-mode range |
| 2 (GND) | Ground reference | Primary return path for supply current and reference bias; must be low-impedance |
| 3 (REF) | Reference voltage input | Level-shifts output DC bias; 0.01 nA input current allows direct resistor-divider connection |
| 4 (ADC OUT) | Filtered output | Provides 5 kΩ series resistance for antialiasing RC filter with external C3 (e.g., 39 nF) |
| 5 (FILT) | Filter capacitor connection | Connects to OUT via external capacitor (C2 = 680 pF) to suppress 60 kHz autocorrection ripple |
| 6 (OUT) | Direct amplifier output | Unfiltered rail-to-rail output; used when signal bandwidth ≤10 Hz or external filtering preferred |
| 7 (+VS) | Positive supply | Accepts 1.8–5.5 V; requires 0.1 μF ceramic bypass capacitor placed adjacent to pin |
| 8 (+IN) | Noninverting input terminal | True differential input node; matched impedance to −IN for optimal CMR |
Key Features
| Feature | Design Value |
|---|---|
| Integrated filter resistors (R1/R2/R3) | Reduces BOM count by 3 precision resistors and eliminates layout sensitivity to resistor matching |
| Buffered REF pin | Enables direct connection to mid-supply divider without external op amp, saving PCB area and cost |
| Two independent outputs (OUT/ADC OUT) | Supports simultaneous unfiltered monitoring and filtered ADC acquisition in closed-loop systems |
| Autocorrection at 60 kHz | Suppresses 1/f noise and thermal drift without introducing chopper-induced intermodulation artifacts |
| High PSR (120 dB) | Maintains accuracy despite ±100 mV supply ripple in battery-powered sensor nodes |
Applications
| Current Sensing | Strain Gauge Amplification |
|---|---|
Use Scenario: Measuring bidirectional motor phase current through a 10 mΩ shunt resistor in a 24 V BLDC drive. IC Role / Device Role / Timing Role: Precision in-amp conditions the differential shunt voltage with 160× gain and filters switching noise before 12-bit ADC sampling. Use Value: 0.7 μVp-p noise and 140 dB CMR enable resolution of 50 mA increments within 10 A full-scale range under PWM noise. |
Use Scenario: Amplifying Wheatstone bridge output from a 350 Ω foil strain gauge in structural health monitoring. IC Role / Device Role / Timing Role: Provides fixed-gain, low-drift amplification with integrated antialiasing to match 100 Hz sampling rate. Use Value: 0.3 μV/°C drift and 3 μV max offset ensure <0.05% FS error across −25°C to +70°C ambient variation. |
| Thermocouple Amplifiers | Portable Medical Instruments |
Use Scenario: Cold-junction-compensated K-type thermocouple interface in handheld temperature calibrators. IC Role / Device Role / Timing Role: Amplifies microvolt-level thermocouple EMF while rejecting 50/60 Hz line noise and suppressing 1/f drift. Use Value: 0.7 μVp-p (0.01–10 Hz) noise and 140 dB CMR deliver ±0.5°C accuracy over 0–1000°C range. |
Use Scenario: Front-end signal conditioning for disposable ECG electrodes in battery-powered patient monitors. IC Role / Device Role / Timing Role: Low-power (1.3 mA), rail-to-rail in-amp acquires biopotential signals with minimal external components. Use Value: 1.8 V operation and 8-lead SOT-23 package enable compact, low-cost 3-lead ECG modules with <10 μV input-referred noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8420ARMZ | Pin-compatible 8-lead MSOP; programmable gain (1–1000); higher supply current (1.6 mA); no integrated filter resistors | Requires external gain resistors and separate antialiasing filter design; better for multi-gain systems | Select AD8420ARMZ when variable gain or higher bandwidth (>1.5 MHz) is required; AD8293G160ARJZ-R7 preferred for fixed-gain, ultra-low-noise, component-count-sensitive designs |
| INA333AIDRGT | 5-lead SOT-23; fixed gain options include 160; 0.25 μVp-p noise (0.1–10 Hz); no integrated R1/R2/R3; lower CMR (100 dB) | Lacks integrated filter network; requires external RC for antialiasing; smaller footprint but higher noise floor at sub-1 Hz | Choose INA333AIDRGT for space-constrained designs where 5-lead package is mandatory and 0.25 μVp-p noise suffices; AD8293G160ARJZ-R7 delivers superior CMR and integrated filtering for precision sensor interfaces |
Compared with AD8420ARMZ and INA333AIDRGT, AD8293G160ARJZ-R7 uniquely combines fixed 160× gain, integrated 3-resistor filter network, 140 dB CMR, and 0.7 μVp-p low-frequency noise in an 8-lead SOT-23-enabling lowest-component-count, highest-accuracy solutions for current sensing and thermocouple amplification.
Availability
AD8293G160ARJZ-R7 is available at Aetrix Electronics and suitable for current sensing, strain gauge amplification, thermocouple measurement, and portable medical instrumentation requiring stable component supply and long-term production continuity.
Supply support for AD8293G160ARJZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with over 50 years of innovation in precision signal conditioning.
The AD8293Gxx family was designed specifically for ultra-low-noise, zero-drift instrumentation in space- and power-constrained applications such as portable diagnostics, industrial process sensors, and battery-operated test equipment.
FAQ
What is the maximum operating supply voltage for AD8293G160ARJZ-R7?
The absolute maximum supply voltage for AD8293G160ARJZ-R7 is 6 V, but the recommended operating range is 1.8 V to 5.5 V. Operation above 5.5 V risks permanent damage per Absolute Maximum Ratings (Table 4). At 5.5 V, AD8293G160ARJZ-R7 maintains rail-to-rail output swing and 140 dB CMR performance across −40°C to +85°C.
Does AD8293G160ARJZ-R7 require external gain-setting resistors?
No, AD8293G160ARJZ-R7 does not require external gain-setting resistors. It features a fixed gain of 160 implemented internally using laser-trimmed thin-film resistors. This eliminates gain error due to external resistor tolerance and temperature drift, and reduces PCB area versus traditional 3-op-amp in-amps requiring discrete gain networks.
How is the 500 Hz filter bandwidth achieved in AD8293G160ARJZ-R7?
The 500 Hz system bandwidth in AD8293G160ARJZ-R7 results from cascading two 700 Hz poles: one formed by internal R2 (320 kΩ) and external C2 (680 pF), and the second by internal R3 (5 kΩ) and external C3 (39 nF) at the ADC OUT pin. This dual-pole configuration meets anti-aliasing requirements for 1 kSPS ADC sampling while maintaining stability.
Can AD8293G160ARJZ-R7 operate with a single 1.8 V supply?
Yes, AD8293G160ARJZ-R7 is fully specified for 1.8 V single-supply operation. At 1.8 V, it delivers rail-to-rail output swing (0.075 V to VCC − 0.075 V), 106 dB CMR (at VCM = 0 V to 1 V), and 1.5 mA maximum supply current across −40°C to +85°C. Input common-mode range extends to 0 V, enabling ground-referenced sensor interfaces.
What is the function of the FILT pin on AD8293G160ARJZ-R7?
The FILT pin on AD8293G160ARJZ-R7 connects to the internal current-mode correction node and must be tied to the OUT pin via an external capacitor (C2 = 680 pF for 500 Hz filter). This capacitor attenuates 60 kHz autocorrection ripple at the output, reducing switching feedthrough that would otherwise alias into baseband measurements.
AD8293G160ARJZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 500 Hz
- Current - Input Bias:
- 400 pA
- Voltage - Input Offset:
- 9 µV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
AD8293G160ARJZ-R7 FAQ
1.How can I place an order for AD8293G160ARJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8293G160ARJZ-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 AD8293G160ARJZ-R7 reliable?
The price and inventory of AD8293G160ARJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8293G160ARJZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8293G160ARJZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8293G160ARJZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8293G160ARJZ-R7?
AD8293G160ARJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8293G160ARJZ-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 AD8293G160ARJZ-R7?
For technical support, including AD8293G160ARJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8293G160ARJZ-R7 requirements.
6.How does Aetrix verify that AD8293G160ARJZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8293G160ARJZ-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 AD8293G160ARJZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8293G160ARJZ-R7?
All AD8293G160ARJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8293G160ARJZ-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 AD8293G160ARJZ-R7 part is unused and in its original packaging.
Return procedure for AD8293G160ARJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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