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Analog Devices Inc. AD8222HBCPZ-R7
- Part No.:
- AD8222HBCPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN, CSP
- Datasheet:
-
AD8222HBCPZ-R7.pdf
- Description:
- IC INST AMP 2 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
AD8222HBCPZ-R7 from Analog Devices is a dual-channel, precision instrumentation amplifier in a 4 mm × 4 mm LFCSP package, delivering 126 dB minimum CMRR at G = 100, 8 nV/√Hz input voltage noise at 1 kHz, and 60 µV max input offset voltage (B grade). It operates from ±2.3 V to ±18 V supplies, draws ≤2.2 mA total quiescent current, and targets high-accuracy sensor signal conditioning in multichannel medical and industrial systems.
For engineers reviewing the AD8222HBCPZ-R7 datasheet, AD8222HBCPZ-R7 pinout, AD8222HBCPZ-R7 application, or AD8222HBCPZ-R7 equivalent, this page provides verified technical context, validated pin functions, confirmed dual-channel DC/ac performance specs, and real-world application mappings for ECG front-ends, bridge sensor interfaces, differential ADC drivers, and remote sensing systems.
Technical Context
The AD8222HBCPZ-R7 implements a classic 3-op-amp architecture with current-feedback input stages, enabling gain-bandwidth product increase with gain-unlike voltage-feedback amplifiers. Each channel uses matched transistor pairs (Q1/Q2) and precision resistors (R1/R2 = 24.7 kΩ) to achieve stable gain via external RG resistor per channel (G = 1 + 49.4 kΩ/RG).
It supports both single-ended and differential output configurations. In differential mode, it delivers balanced outputs with ≥80 dB output balance up to 10 kHz and maintains ≥100 dB CMRR at 4 kHz (G = 100), enabling robust rejection of wideband interference in noisy environments such as remote sensor cabling or industrial plant floors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 via single external resistor per channel - enables flexible signal scaling without redesigning feedback networks. |
| CMRR (G = 100) | 126 dB min (DC–60 Hz), ≥100 dB at 4 kHz - ensures reliable rejection of line harmonics and common-mode noise in ECG and bridge measurements. |
| Input Offset Voltage | 60 µV max (B grade, −40°C to +85°C) - reduces calibration burden in precision strain gage and medical instrumentation. |
| Input Voltage Noise | 8 nV/√Hz at 1 kHz, 0.25 µV p-p (0.1 Hz–10 Hz) - preserves low-frequency signal integrity for biopotential and slow-varying sensor outputs. |
| Bandwidth (G = 100) | 140 kHz - supports fast settling (13 µs to 0.001%) for high-resolution data acquisition at >10 kSPS. |
| Supply Range | ±2.3 V to ±18 V - accommodates both low-voltage portable medical devices and high-voltage industrial process controllers. |
| Quiescent Current | 2.2 mA max (both channels) - enables dual-channel precision amplification within tight power budgets for battery-operated systems. |
Pinout & Package
AD8222HBCPZ-R7 is packaged in a 16-lead LFCSP (CP-16-19, no thermal pad), 4 mm × 4 mm footprint. The exposed pad is internally connected to −VS and must be tied to the negative supply plane per datasheet Figure 2 and Table 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| −IN1, −IN2 | Negative input terminals (Channel 1 & 2) | Differential input nodes referenced to respective +IN pins; require matched source impedances for optimal CMRR. |
| +IN1, +IN2 | Positive input terminals (Channel 1 & 2) | High-impedance (100 GΩ || 2 pF) inputs accepting signals up to ±VS − 1.2 V (G = 1, ±5 V–±18 V supplies). |
| RG1, RG2 | Gain-setting resistor terminals (per channel) | Each pair accepts one external resistor to set gain (G = 1 + 49.4 kΩ/RG); open-circuit defaults to G = 1. |
| REF1, REF2 | Reference inputs (Channel 1 & 2) | Set output common-mode level; driven to ground for single-ended outputs or to mid-supply for rail-to-rail ADC interfacing. |
| OUT1, OUT2 | Amplifier outputs (Channel 1 & 2) | Capable of driving 2 kΩ loads with ±VS − 1.4 V swing (G = 100, ±5 V–±18 V); support differential output configuration. |
| +VS, −VS | Power supply rails | Accept ±2.3 V to ±18 V; −VS connects internally to exposed pad - must be soldered to PCB −VS plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel density | Two independent instrumentation amps in 4 mm × 4 mm LFCSP - doubles channel count vs. discrete single-channel solutions without area penalty. |
| Adjustable common-mode output | Independent REF1/REF2 pins allow per-channel output level-shifting - enables direct interface to single-supply SAR ADCs without external level-shift circuitry. |
| Differential output capability | Configurable as single-channel differential output - improves noise immunity over long cables and matches fully-differential ADC inputs without external baluns. |
| High CMRR over frequency | ≥80 dB CMRR maintained to 4 kHz at G = 1 - eliminates need for aggressive external filtering in 50/60 Hz–rich industrial environments. |
| Low drift performance | 0.3 µV/°C max input offset drift (B grade) - minimizes thermal-induced errors in uncalibrated temperature-varying applications like structural health monitoring. |
Applications
| ECG Signal Conditioning | Wheatstone Bridge Interface |
|---|---|
Use Scenario: Amplifying microvolt-level differential cardiac signals from electrode pairs in 12-lead ECG systems with high common-mode interference from power lines and RF sources. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier providing simultaneous, matched gain and filtering for limb and chest leads. Use Value: 126 dB CMRR at G = 100 and 0.25 µV p-p 0.1–10 Hz noise preserve diagnostic waveform fidelity without post-acquisition digital correction. |
Use Scenario: Reading small resistance changes (≤10 mΩ) in load cells or pressure sensors under mechanical stress, where excitation voltage drift and thermal EMFs dominate error budget. IC Role / Device Role / Timing Role: Precision front-end amplifier converting bridge differential output into clean, amplified voltage for 24-bit sigma-delta ADC conversion. Use Value: 60 µV max input offset and 0.3 µV/°C drift reduce zero-point calibration frequency in industrial weighing systems operating across −40°C to +85°C. |
| Differential ADC Driver | Remote Sensor Signal Transmission |
Use Scenario: Driving the fully-differential input of high-resolution ADCs (e.g., AD7768, ADS127L01) in vibration analysis or power quality analyzers requiring >100 dB SNR. IC Role / Device Role / Timing Role: Configured in differential-output mode to deliver balanced, low-noise analog signals directly to ADC inputs. Use Value: Differential outputs suppress even-order harmonics and common-mode noise pickup, enabling >110 dB effective number of bits (ENOB) at 10 kSPS. |
Use Scenario: Transmitting sensor outputs (e.g., thermocouple, RTD) over 10+ meter twisted-pair cables in factory automation, where EMI from VFDs and contactors corrupts single-ended signals. IC Role / Device Role / Timing Role: Instrumentation amplifier with differential output stage acting as noise-immune line driver. Use Value: ≥80 dB output balance up to 10 kHz ensures minimal common-mode-to-differential conversion in cable, preserving signal integrity without shielded cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARZ | Single-channel, same gain architecture and noise (8 nV/√Hz), but lacks second channel and REF2 pin; 8-lead SOIC package. | Suitable only for single-sensor systems; requires two units for dual-channel operation, increasing board area and cost. | Select when only one channel is needed and SOIC layout compatibility is required; not drop-in for AD8222HBCPZ-R7 due to pin count and channel count mismatch. |
| INA128UA | Single-channel, higher input bias current (500 pA typ vs. 0.2 nA max), lower CMRR (120 dB min at G = 100), wider 16-lead SOIC package. | Lower precision for ultra-low-offset applications; less suitable for medical-grade ECG where sub-100 nV/√Hz noise and <100 µV offset are critical. | Consider for cost-sensitive industrial sensor interfaces where B-grade AD8222HBCPZ-R7 performance exceeds requirements; not pin-compatible or functionally identical. |
Compared with AD8222HBCPZ-R7, AD8221ARZ offers identical per-channel performance but requires duplication for dual-channel use, while INA128UA trades precision and noise for lower cost-making AD8222HBCPZ-R7 the optimal choice for space-constrained, high-channel-density medical and test equipment.
Availability
AD8222HBCPZ-R7 is available at Aetrix Electronics and suitable for ECG front-ends, Wheatstone bridge sensor interfaces, and differential ADC driver circuits requiring stable component supply, full industrial temperature range (−40°C to +85°C), and RoHS-compliant packaging.
Supply support for AD8222HBCPZ-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, with design centers worldwide and decades of expertise in precision signal conditioning.
The AD8222HBCPZ-R7 belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for multichannel, low-noise, high-CMRR sensor signal extraction in medical diagnostics, industrial process control, and test instrumentation.
FAQ
What is the maximum gain achievable with AD8222HBCPZ-R7?
The AD8222HBCPZ-R7 supports gains from 1 to 10,000 using a single external resistor per channel, calculated as G = 1 + 49.4 kΩ/RG. For G = 10,000, RG = 4.94 Ω is required; however, practical implementation limits gain by resistor tolerance, thermal drift, and noise-B-grade AD8222HBCPZ-R7 achieves verified 126 dB CMRR at G = 100 and maintains ≥80 dB CMRR up to 4 kHz even at G = 1.
Does AD8222HBCPZ-R7 support differential output configuration?
Yes, AD8222HBCPZ-R7 can be configured as a single-channel differential output instrumentation amplifier using its internal architecture. This mode leverages both OUT1 and OUT2 pins to generate complementary outputs, achieving ≥80 dB output balance up to 10 kHz-ideal for driving differential-input ADCs or transmitting signals over noisy environments without external baluns.
What is the recommended power supply decoupling for AD8222HBCPZ-R7?
Per Analog Devices' layout guidelines, AD8222HBCPZ-R7 requires 10 µF tantalum or ceramic capacitors on +VS and −VS pins, placed within 1 cm of the device, plus 0.1 µF ceramic capacitors in parallel. The exposed pad must be soldered to the −VS plane to ensure thermal stability and low-impedance return path-omitting this connection degrades PSRR and increases thermal drift in AD8222HBCPZ-R7 operation.
How does AD8222HBCPZ-R7 handle input overvoltage conditions?
AD8222HBCPZ-R7 features ESD diodes on REF1 and REF2 pins, limiting reference input voltage to within ±0.3 V of supply rails. Input pins (±IN1/±IN2) tolerate differential voltages up to ±VS and common-mode voltages from −VS to +VS. However, sustained overvoltage beyond absolute maximum ratings (±18 V supply, ±VS input) may cause permanent damage-external clamping or series resistors are advised for field-deployed AD8222HBCPZ-R7 in harsh environments.
Is AD8222HBCPZ-R7 compatible with single-supply operation?
Yes, AD8222HBCPZ-R7 operates on single supplies (e.g., +5 V and ground) by tying −VS to ground and applying appropriate bias to REF1/REF2. Its input common-mode range extends to −VS + 1.9 V (e.g., +1.9 V with +5 V supply), and output swing reaches −VS + 1.1 V, enabling direct interfacing with 3.3 V or 5 V single-supply ADCs when reference pins are set to mid-supply-verified in AD8222HBCPZ-R7 datasheet Figure 8 and Table 2.
AD8222HBCPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VQFN, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 7 MHz
- -3db Bandwidth:
- 1.2 MHz
- Current - Input Bias:
- 200 pA
- Voltage - Input Offset:
- 60 µV
- Current - Supply:
- 900µA (x2 Channels)
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-VQ (4x4)
AD8222HBCPZ-R7 FAQ
1.How can I place an order for AD8222HBCPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8222HBCPZ-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 AD8222HBCPZ-R7 reliable?
The price and inventory of AD8222HBCPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8222HBCPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8222HBCPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8222HBCPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8222HBCPZ-R7?
AD8222HBCPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8222HBCPZ-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 AD8222HBCPZ-R7?
For technical support, including AD8222HBCPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8222HBCPZ-R7 requirements.
6.How does Aetrix verify that AD8222HBCPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8222HBCPZ-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 AD8222HBCPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8222HBCPZ-R7?
All AD8222HBCPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8222HBCPZ-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 AD8222HBCPZ-R7 part is unused and in its original packaging.
Return procedure for AD8222HBCPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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