My Inquiry
My Account
Analog Devices Inc. AD623AR-REEL7
- Part No.:
- AD623AR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD623AR-REEL7.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,391
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD623AR-REEL7 from Analog Devices is a rail-to-rail output, single/dual-supply instrumentation amplifier optimized for low-power precision signal conditioning. It delivers 0.10% gain error at G = 1, 800 kHz bandwidth, 35 nV/√Hz input-referred noise at 1 kHz, and operates from 2.7 V to ±6 V supplies. It is used in thermocouple amplification, medical sensor front-ends, and industrial transducer interfaces where low quiescent current (max 550 µA) and wide input common-mode range (down to −0.15 V on single supply) are critical.
For engineers reviewing the AD623AR-REEL7 datasheet, AD623AR-REEL7 pinout, AD623AR-REEL7 application, or AD623AR-REEL7 equivalent, this page provides verified specifications, functional pin definitions, real-world use cases, and validated alternative parts - all aligned with Rev. G datasheet parameters and SOIC-8 package implementation.
Technical Context
The AD623AR-REEL7 implements a three-op-amp instrumentation architecture with internal laser-trimmed resistors enabling precise gain setting via a single external resistor (RG), supporting gains from 1 to 1000. Its CMRR increases with gain (up to 110 dB at G = 100) and remains stable up to 200 Hz, rejecting line-frequency interference without external filtering.
It features a reference input (REF) that sets output common-mode voltage independently of gain, and supports true rail-to-rail output swing (e.g., 0.2 V to +VS − 0.5 V on 5 V single supply). Input stage allows common-mode voltages 150 mV below ground, enabling direct interfacing with grounded-sensor configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 1000, set by single external resistor RG - eliminates need for matched resistor networks. |
| Input Offset Voltage (RTI) | 25 µV min / 200 µV typ (G = 1) - enables high-resolution DC measurement without nulling circuitry. |
| CMRR @ 60 Hz (G = 100) | 105–110 dB - rejects mains-induced interference in noisy industrial environments. |
| Small-Signal Bandwidth (G = 1) | 800 kHz - supports fast step response in data acquisition systems sampling ≤100 kSPS. |
| Quiescent Current | 305–550 µA - suitable for battery-powered portable instrumentation with multi-day operation. |
| Input Voltage Range (Single Supply) | −0.15 V to +VS − 1.5 V - accepts signals below ground, simplifying thermocouple cold-junction compensation. |
| Output Swing (RL = 10 kΩ) | 0.2 V to +VS − 0.5 V - maximizes dynamic range when driving ADCs with 0–5 V input ranges. |
Pinout & Package
AD623AR-REEL7 is supplied in an 8-lead SOIC package (SOIC_N, 150 mil width), RoHS-compliant and tape-and-reel packaged per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−RG) | Inverting terminal of external gain-setting resistor | Connects to one end of RG; forms precision ratio with internal 50 kΩ resistors to define gain. |
| 2 (−IN) | Inverting input of instrumentation amplifier | Differential input node; high-impedance (2 GΩ || 2 pF) for minimal loading of sensors. |
| 3 (+IN) | Noninverting input of instrumentation amplifier | Primary signal input; matched to −IN for optimal CMRR and offset rejection. |
| 4 (−VS) | Negative supply rail | Accepts 0 V (single supply) or negative voltage (dual supply); supports operation down to −VS = 0 V. |
| 5 (REF) | Output reference voltage input | Sets output common-mode level; driven by DAC or voltage divider to interface with ADC reference rails. |
| 6 (OUTPUT) | Amplified differential output | Rail-to-rail capable; drives 10 kΩ loads directly; no external buffer needed for most 12–16-bit ADCs. |
| 7 (+VS) | Positive supply rail | Supports 2.7–12 V single supply or ±2.5–±6 V dual supply; regulates internal bias generation. |
| 8 (+RG) | Noninverting terminal of external gain-setting resistor | Completes RG connection; gain = 1 + (100 kΩ / RG) - e.g., RG = 100 kΩ → G = 2. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range without level-shifting circuitry, reducing BOM count and layout area. |
| Input common-mode range extends 150 mV below ground | Allows direct connection to grounded thermocouples or bridge sensors without level-shifting op-amps. |
| Gain set with one external resistor | Eliminates precision resistor matching requirements and reduces calibration complexity in production test. |
| Low 35 nV/√Hz input-referred noise at 1 kHz | Preserves signal integrity in low-level sensor applications such as strain gauges and ECG electrodes. |
| 800 kHz bandwidth at G = 1 | Supports accurate amplification of fast transients in vibration monitoring and motor current sensing. |
Applications
| Thermocouple Amplification | Portable ECG Front-End |
|---|---|
|
Use Scenario: Amplifying µV-level thermocouple outputs (e.g., Type K) with cold-junction compensation in HVAC controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain, high CMRR, and sub-200 µV offset to resolve <1°C temperature resolution. Use Value: Eliminates need for external chopper-stabilized amps or auto-zero circuits due to low drift (0.1 µV/°C tempco) and 110 dB CMRR at 60 Hz. |
Use Scenario: Conditioning biopotential signals from dry-electrode ECG leads in wearable monitors. IC Role / Device Role / Timing Role: Low-noise, low-power in-amp capturing 0.5–100 Hz cardiac waveforms while rejecting motion artifacts and EMG interference. Use Value: 35 nV/√Hz noise and 550 µA max IQ enable >8-hour battery life in coin-cell-powered devices without sacrificing SNR. |
| Industrial Bridge Sensor Interface | Low-Power Data Acquisition Channel |
|
Use Scenario: Reading 350 Ω strain-gauge bridges in load cells and pressure transducers within factory automation PLC modules. IC Role / Device Role / Timing Role: Differential amplifier with programmable gain (G = 100–500) and 100 dB PSRR to suppress supply ripple in noisy 24 V DC industrial rails. Use Value: 100 dB PSRR at G = 100 ensures stable readings despite switching regulator noise, avoiding post-acquisition digital filtering. |
Use Scenario: Building modular 16-channel DAQ systems for environmental monitoring using microcontroller-based hosts. IC Role / Device Role / Timing Role: Standalone gain-stage IC with REF pin allowing synchronized output level-setting across multiple channels via shared DAC. Use Value: Pin-compatible SOIC-8 footprint and single-resistor gain scaling simplify PCB design and firmware calibration across channel variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | Higher precision (25 µV max VOS, 0.001% gain error), wider supply (±2.3–±18 V), but higher IQ (1.1 mA). | Better suited for laboratory-grade measurements; less ideal for battery-powered designs. | Select AD8221ARMZ when absolute accuracy and long-term stability outweigh power constraints. |
| INA333AIDR | Lower IQ (50 µA), integrated RG (fixed G = 1–1000), but narrower bandwidth (500 kHz @ G = 1) and reduced CMRR (100 dB @ 60 Hz). | Optimized for ultra-low-power IoT sensors; trade-off includes lower noise floor (25 nV/√Hz) and smaller footprint. | Select INA333AIDR when system-level power budget is <100 µA/channel and gain flexibility is secondary to size. |
Compared with AD623AR-REEL7, AD8221ARMZ offers superior DC accuracy at higher power cost, while INA333AIDR achieves dramatic IQ reduction with modest bandwidth and CMRR trade-offs - making AD623AR-REEL7 the balanced choice for mid-tier industrial and medical signal chains requiring both precision and efficiency.
Availability
AD623AR-REEL7 is available at Aetrix Electronics and suitable for thermocouple amplification, portable biopotential monitoring, and industrial bridge sensor interfacing requiring stable component supply, long-lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for AD623AR-REEL7 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 AD623 belongs to Analog Devices' precision instrumentation amplifier product line, designed specifically for low-power, high-accuracy sensor signal conditioning in medical, industrial, and test equipment applications.
FAQ
What is the maximum gain achievable with AD623AR-REEL7?
The AD623AR-REEL7 supports a gain range of 1 to 1000, set by a single external resistor RG using the formula G = 1 + (100 kΩ / RG). For G = 1000, RG = 100 Ω is required. At this gain, bandwidth reduces to 2 kHz and settling time increases to 20 µs (0.01%), as specified in Table 2 and Table 3 of Rev. G datasheet.
Does AD623AR-REEL7 require external capacitors for stability?
No, the AD623AR-REEL7 is internally compensated and does not require external frequency compensation capacitors. It remains stable under all gain settings and load conditions up to 100 kΩ, as confirmed in the "Stability" section of the Rev. G datasheet and Figure 29's gain-vs-frequency plots.
Can AD623AR-REEL7 operate from a single 3.3 V supply?
Yes, AD623AR-REEL7 operates from single supplies as low as 2.7 V. At +VS = 3.3 V, it maintains rail-to-rail output swing (0.2 V to 2.8 V typical), input common-mode range down to −0.15 V, and full functionality - verified in Table 2 (Single Supply) and Figure 34 of the Rev. G datasheet.
How is the reference input (REF pin) used in AD623AR-REEL7?
The REF pin sets the output common-mode voltage independent of gain. When driven to a fixed voltage (e.g., 1.65 V for 3.3 V systems), it centers the amplified output around that level - essential for interfacing with single-supply ADCs. Input impedance is 100 kΩ ±20%, and gain from REF to OUTPUT is precisely 1 V/V (±0.02%).
What is the thermal performance of AD623AR-REEL7 in SOIC-8 package?
In its 8-lead SOIC package, AD623AR-REEL7 has a junction-to-ambient thermal resistance (θJA) of 155°C/W. At max quiescent current (550 µA) and 5 V supply, power dissipation is ~2.75 mW, resulting in negligible self-heating (<0.5°C rise) - ensuring stable offset and gain behavior across −40°C to +85°C operating range.
AD623AR-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 800 kHz
- Current - Input Bias:
- 17 nA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 375µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD623AR-REEL7 FAQ
1.How can I place an order for AD623AR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD623AR-REEL7 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 AD623AR-REEL7 reliable?
The price and inventory of AD623AR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD623AR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD623AR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD623AR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD623AR-REEL7?
AD623AR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD623AR-REEL7 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 AD623AR-REEL7?
For technical support, including AD623AR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD623AR-REEL7 requirements.
6.How does Aetrix verify that AD623AR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD623AR-REEL7 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 AD623AR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD623AR-REEL7?
All AD623AR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD623AR-REEL7, 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 AD623AR-REEL7 part is unused and in its original packaging.
Return procedure for AD623AR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD623AR-REEL7 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
