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Analog Devices Inc. AD8293G160BRJZ-R7
- Part No.:
- AD8293G160BRJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
AD8293G160BRJZ-R7.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,967
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Product details
Overview
AD8293G160BRJZ-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), and rail-to-rail output. It operates from 1.8 V to 5.5 V, delivers 0.7 μV p-p input-referred noise (0.01 Hz–10 Hz), and achieves 140 dB typical CMR for high-accuracy current sensing in portable medical instruments.
For engineers reviewing the AD8293G160BRJZ-R7 datasheet, AD8293G160BRJZ-R7 pinout, AD8293G160BRJZ-R7 application, or AD8293G160BRJZ-R7 equivalent, key selection considerations include its B-grade 20 μV max offset voltage, 0.3 μV/°C max drift, 500 Hz filter-limited bandwidth, dual-output architecture (OUT and ADC OUT), and SOT-23-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AD8293G160BRJZ-R7 uses a current-mode correction topology with internal auto-zeroing, enabling continuous offset correction across −40°C to +85°C. Its architecture integrates R1, R2, and R3 to eliminate external gain-setting components and support two-pole filtering with only C2 and C3.
It features a buffered REF pin (10 pA input current) that maintains 140 dB CMR without external op-amp buffering, and employs a 60 kHz internal clock for autocorrection-requiring proper 0.1 μF supply bypassing to suppress clock feedthrough at the OUT and ADC OUT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 160 - eliminates gain-setting resistor tolerance errors and layout sensitivity |
| Input Offset Voltage | 3 μV to 20 μV (B grade) - enables sub-μV-level dc accuracy in strain gauge and thermocouple amplification |
| Offset Drift | 0.02 μV/°C to 0.3 μV/°C - ensures stable baseline over industrial temperature range without recalibration |
| CMR | 110 dB to 140 dB - rejects common-mode interference in noisy motor control or battery-monitoring environments |
| Noise (0.01–10 Hz) | 0.7 μV p-p - supports high-resolution dc measurements in portable ECG or pressure sensor front-ends |
| Supply Range | 1.8 V to 5.5 V - allows direct interface with Li-ion batteries and low-voltage microcontrollers |
| Output Type | Rail-to-rail - maximizes dynamic range into 12-bit+ ADCs without level-shifting circuitry |
| Filter Bandwidth | 500 Hz (with C2 = 680 pF, C3 = 39 nF) - provides antialiasing for 1-kSPS data acquisition systems |
Pinout & Package
AD8293G160BRJZ-R7 is housed in an 8-lead halogen-free, Pb-free SOT-23 (RJ-8) package measuring 2.90 mm × 1.60 mm × 1.30 mm, optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting input terminal | True differential input node; accepts signals up to VCC − 1.7 V common-mode range |
| 2 (GND) | Ground reference | Primary return path for supply current and signal reference; must be low-impedance |
| 3 (REF) | Reference voltage input | Level-shifts output DC bias; 10 pA input current enables direct resistor-divider or precision reference drive |
| 4 (ADC OUT) | Filtered output with 5 kΩ series resistor | Connects directly to ADC input with external C3 for antialiasing; reduces switching ripple vs. OUT |
| 5 (FILT) | Filter capacitor connection | Node for C2 placement; forms primary pole with internal R2 (320 kΩ) to limit autocorrection noise |
| 6 (OUT) | Direct instrumentation amplifier output | Unfiltered, low-impedance output for post-processing or high-bandwidth monitoring |
| 7 (+VS) | Positive supply rail | Accepts 1.8 V–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 ensures optimal CMR performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated filter resistors (R1/R2/R3) | Reduces external component count by ≥3 resistors; enables 2-pole filtering with only two capacitors |
| B-grade 20 μV max offset | Supports <100 ppm system-level error in 16-bit current-sensing applications without trimming |
| Dual-output architecture (OUT + ADC OUT) | Enables simultaneous high-fidelity signal monitoring and filtered ADC interfacing on single device |
| Buffered REF pin (10 pA) | Eliminates need for external op-amp buffer, saving PCB area and cost in multi-channel sensor systems |
| 60 kHz autocorrection clock | Provides continuous offset/drift correction while maintaining 0.7 μV p-p low-frequency noise performance |
| SOT-23-8 footprint | Matches industry-standard 8-lead SOT-23 land pattern; compatible with automated assembly and reflow |
Applications
| Current Sensing | Strain Gauge Amplification |
|---|---|
Use Scenario: Measuring bidirectional motor phase current via shunt resistor in battery-powered power tools. IC Role / Device Role / Timing Role: Precision in-amp conditions mV-level shunt voltage with 160× gain and 500 Hz antialiasing before 12-bit SAR ADC. Use Value: 20 μV offset enables ±1% full-scale accuracy at 100 mV shunt drop; rail-to-rail output drives ADC without external level shift. |
Use Scenario: Amplifying Wheatstone bridge output from load-cell-based industrial weighing platform. IC Role / Device Role / Timing Role: Front-end in-amp rejects bridge common-mode voltage while delivering low-noise, dc-stable signal to sigma-delta ADC. Use Value: 140 dB CMR suppresses 60 Hz line noise; 0.3 μV/°C drift limits thermal error to <0.05% over −40°C to +85°C operating range. |
| Thermocouple Amplifiers | Portable Medical Instruments |
Use Scenario: Cold-junction compensation and amplification of K-type thermocouple outputs in handheld temperature calibrators. IC Role / Device Role / Timing Role: Low-noise, zero-drift in-amp rejects thermocouple lead noise and provides stable dc gain for microvolt-level ΔT measurement. Use Value: 0.7 μV p-p (0.01–10 Hz) noise floor resolves <0.1°C increments; REF pin simplifies cold-junction reference implementation. |
Use Scenario: Front-end signal conditioning for disposable ECG electrodes in wearable cardiac monitors. IC Role / Device Role / Timing Role: Single-supply in-amp acquires high-CMR biopotential signals while minimizing power and board area. Use Value: 1.3 mA supply current extends battery life; SOT-23-8 footprint enables compact 3-lead ECG analog front-end integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8237ARMZ-R7 | Pin-compatible SOT-23-8, 100 V/V fixed gain, 25 μV max offset (A grade), no integrated filter resistors | Requires external RG and RC filter components; lacks R1/R2/R3 integration | Select when higher gain accuracy (0.05% gain error) is prioritized over component count reduction |
| INA333AIDRGT | 10-lead VSSOP, 10–1000 V/V programmable gain, 25 μV max offset, no integrated filter network | Requires external gain resistors and separate antialiasing filter design; larger footprint | Select when variable gain or wider supply range (1.8 V–5.5 V) with enhanced PSR (110 dB) is required |
Compared with AD8293G160BRJZ-R7, AD8237ARMZ-R7 offers tighter gain error but increases BOM count and layout complexity, while INA333AIDRGT provides gain flexibility at the cost of larger size and no integrated filtering-making AD8293G160BRJZ-R7 optimal for high-volume, space-constrained, fixed-gain sensor signal chains.
Availability
AD8293G160BRJZ-R7 is available at Aetrix Electronics and suitable for current sensing, strain gauge amplification, thermocouple conditioning, and portable medical instrumentation requiring stable component supply across industrial temperature ranges.
Supply support for AD8293G160BRJZ-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.
The AD8293Gxx family was designed specifically for ultra-low-power, space-constrained precision sensor signal conditioning-emphasizing integrated filtering, zero-drift stability, and simplified reference architecture for portable and battery-operated systems.
FAQ
What is the maximum input common-mode voltage range for AD8293G160BRJZ-R7?
The AD8293G160BRJZ-R7 supports an input common-mode voltage range from 0 V to VCC − 1.7 V. At VCC = 5 V, this yields a usable range of 0 V to 3.3 V; at VCC = 2.7 V, it is 0 V to 1.0 V. This specification is confirmed in Table 2 and Table 3 of the AD8293G80/AD8293G160 Rev. 0 datasheet under Input Voltage Range.
Does AD8293G160BRJZ-R7 require external gain-setting resistors?
No, AD8293G160BRJZ-R7 does not require external gain-setting resistors. It integrates R1 = 4 kΩ and R2 = 320 kΩ internally to achieve its fixed gain of 160. This eliminates gain error due to external resistor tolerance and layout parasitics, as explicitly stated in the General Description and Applications Information sections of the datasheet.
How is the 500 Hz filter bandwidth implemented in AD8293G160BRJZ-R7?
The 500 Hz filter bandwidth in AD8293G160BRJZ-R7 is achieved using two cascaded poles: a primary pole formed by internal R2 (320 kΩ) and external C2 (680 pF), and a secondary pole formed by internal R3 (5 kΩ) and external C3 (39 nF). This configuration is detailed in Table 8 and Figure 19 of the datasheet, and is validated for B-grade operation across −40°C to +85°C.
Can AD8293G160BRJZ-R7 operate from a 1.8 V supply?
Yes, AD8293G160BRJZ-R7 is fully specified to operate from 1.8 V to 5.5 V. Electrical characteristics including CMR, PSR, and offset drift are guaranteed across this full range per Tables 2 and 3. The 1.8 V minimum enables direct use with single-cell Li-ion or alkaline battery systems without regulation.
What is the purpose of the FILT pin on AD8293G160BRJZ-R7?
The FILT pin on AD8293G160BRJZ-R7 connects to the internal node between R2 and the output stage, allowing placement of external capacitor C2 to form the primary low-pass filter pole. As described in the Output Filtering section, this capacitor suppresses autocorrection clock feedthrough and sets the dominant filter frequency-critical for achieving the specified 0.7 μV p-p noise performance.
AD8293G160BRJZ-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
AD8293G160BRJZ-R7 FAQ
1.How can I place an order for AD8293G160BRJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8293G160BRJZ-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 AD8293G160BRJZ-R7 reliable?
The price and inventory of AD8293G160BRJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8293G160BRJZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8293G160BRJZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8293G160BRJZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8293G160BRJZ-R7?
AD8293G160BRJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8293G160BRJZ-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 AD8293G160BRJZ-R7?
For technical support, including AD8293G160BRJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8293G160BRJZ-R7 requirements.
6.How does Aetrix verify that AD8293G160BRJZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8293G160BRJZ-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 AD8293G160BRJZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8293G160BRJZ-R7?
All AD8293G160BRJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8293G160BRJZ-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 AD8293G160BRJZ-R7 part is unused and in its original packaging.
Return procedure for AD8293G160BRJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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