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Analog Devices Inc. LTC6244HMS8#PBF
- Part No.:
- LTC6244HMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6244HMS8#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:334
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Product details
Overview
LTC6244HMS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, unity-gain stable CMOS operational amplifier optimized for low-noise, high-speed signal conditioning. It delivers 50MHz gain bandwidth, 40V/μs slew rate, 1pA input bias current, 1.5μVP-P 0.1Hz–10Hz noise, and operates from 2.8V to 6V supplies - making it ideal for photodiode amplification in precision medical and scientific instrumentation.
For engineers reviewing the LTC6244HMS8#PBF datasheet, LTC6244HMS8#PBF pinout, LTC6244HMS8#PBF application, or LTC6244HMS8#PBF equivalent, key selection criteria include guaranteed 125°C operation, MS8 package thermal performance (θJA = 250°C/W), channel-to-channel matching specs (e.g., ≤160μV VOS match), and low-input-capacitance (2.1pF common-mode) critical for transimpedance stability.
Technical Context
The LTC6244HMS8#PBF employs a folded-cascode input stage with laser-trimmed MOSFETs to achieve ultra-low offset and drift, while its differential drive generator enables true rail-to-rail output swing within 35mV of either supply rail. Input common-mode range extends to the negative rail, supporting single-supply sensor interfaces.
Its architecture integrates internal compensation capacitor CM to maintain 50MHz GBW without external components, and features reverse-biased ESD diodes (4kV HBM) on all pins. The device is fully specified over –40°C to +125°C, with guaranteed performance including 2.5μV/°C max VOS drift and 75dB min PSRR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50MHz - supports stable closed-loop operation up to 50MHz at unity gain, enabling fast pulse amplification and active filter design. |
| Slew Rate | 40V/μs - ensures faithful reproduction of 10V-step signals in under 250ns, critical for high-fidelity data acquisition front-ends. |
| Input Bias Current | 1pA (typ @ 25°C) - minimizes voltage error in high-impedance photodiode or piezoelectric sensor interfaces (>1GΩ source resistance). |
| 0.1Hz–10Hz Noise | 1.5μVP-P - enables DC-coupled, low-frequency measurement without significant 1/f noise corruption, e.g., in EEG or strain gauge bridges. |
| Input Capacitance | 2.1pF (common-mode) - reduces phase margin degradation in transimpedance amplifiers, allowing stable operation with >1nF photodiode capacitance. |
| Supply Range | 2.8V to 6V - supports battery-powered portable instruments and industrial 3.3V/5V systems without level-shifting circuitry. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive sensing, downhole oil/gas tools, and industrial motor control feedback loops. |
Pinout & Package
The LTC6244HMS8#PBF is housed in an 8-lead plastic MSOP (MS8) package with exposed pad (not electrically connected). Thermal resistance θJA = 250°C/W enables operation at full spec without forced airflow in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Rail-to-rail swing (≤35mV from rails); drives 10kΩ load with <100μV error at 1mA sink/source. |
| 2 - –IN A | Inverting input A | Differential pair gate node; 2.1pF common-mode capacitance affects TIA stability and high-frequency CMRR. |
| 3 - +IN A | Non-inverting input A | Matches –IN A in offset and drift; laser-trimmed for ≤160μV channel-to-channel VOS match. |
| 4 - V– | Negative supply | Reference for internal biasing; exposed pad may be connected to V– for improved thermal performance. |
| 5 - V+ | Positive supply | Accepts 2.8V–6V; PSRR ≥75dB ensures immunity to digital supply noise in mixed-signal PCBs. |
| 6 - OUT B | Amplifier B output | Electrically isolated from OUT A; enables dual-path signal processing (e.g., differential photodiode pairs). |
| 7 - –IN B | Inverting input B | Matched to –IN A; CMRR ≥74dB (0–3.5V VCM) maintains accuracy in single-supply configurations. |
| 8 - +IN B | Non-inverting input B | Independent high-impedance node; supports separate sensor inputs without crosstalk (≥70dB channel separation @ 1MHz). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA typ enables direct connection to >1GΩ sensors (e.g., pH electrodes, piezoresistive MEMS) without guard rings or leakage compensation. |
| Rail-to-rail output swing | Swings to within 35mV of V+ and V–, maximizing dynamic range in low-voltage (3V) systems and reducing headroom loss in battery-powered designs. |
| Laser-trimmed input offset | Max 125μV over –40°C to +125°C ensures minimal DC error in precision integrators and programmable gain amplifier (PGA) reference paths. |
| Low 1/f noise | 1.5μVP-P (0.1–10Hz) allows accurate DC-coupled amplification of slow biological signals (e.g., ECG baseline) without chopper-induced artifacts. |
| High CMRR & PSRR | ≥74dB CMRR and ≥75dB PSRR suppress common-mode interference from noisy digital supplies and ground loops in industrial I/O modules. |
Applications
| Photodiode Amplification | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from large-area Hamamatsu S1227-1010BQ photodiode (CPD = 3000pF) in UV/VIS spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 1MΩ feedback resistor; sets system bandwidth (350kHz) and noise floor (291nV @ 10kHz). Use Value: 1pA input bias prevents dark-current error; 2.1pF input capacitance stabilizes loop with 3000pF diode capacitance per Analog Devices' TA01a reference design. | Use Scenario: Front-end amplification of low-amplitude bio-signals (e.g., EEG, EMG) in portable diagnostic devices. IC Role / Device Role / Timing Role: DC-coupled, low-noise preamplifier with gain ≥100V/V; handles sub-μV signals with minimal 1/f noise contribution. Use Value: 1.5μVP-P 0.1–10Hz noise preserves signal integrity; rail-to-rail output maximizes ADC utilization in 3.3V-powered systems. |
| Active Filter Design | High-Impedance Transducer Interface |
Use Scenario: 4th-order low-pass anti-aliasing filter for 1MSPS SAR ADCs in data acquisition systems. IC Role / Device Role / Timing Role: Dual op-amp implementing two 2-pole MFB stages; GBW ≥50MHz ensures flat passband response to 100kHz. Use Value: Unity-gain stability eliminates need for external compensation; 40V/μs slew rate prevents distortion on 10VP-P step inputs. | Use Scenario: Signal conditioning for high-output-impedance piezoelectric accelerometers in structural health monitoring. IC Role / Device Role / Timing Role: Charge amplifier with FET-input emulation; converts high-Z charge output to low-Z voltage with minimal loading. Use Value: 1pA bias current avoids discharge of sensor's inherent capacitance; 125°C rating supports deployment in engine compartments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4898-2ARMZ | Higher 1GHz GBW but 2.6nV/√Hz input noise (vs. 8–12nV/√Hz for LTC6244HMS8#PBF); 2.5mA supply current per amp (vs. 7.4mA). | Better for RF/IF gain blocks; less suitable for low-frequency precision due to higher broadband noise. | Select ADA4898-2ARMZ when >100MHz small-signal bandwidth is required; LTC6244HMS8#PBF preferred for sub-100kHz low-noise DC-coupled apps. |
| OPA2189IDR | Zero-drift architecture (0.005μV/°C drift vs. 2.5μV/°C); higher 1.2pA bias current; lower 5.2MHz GBW. | Superior long-term DC stability; unsuitable for >5MHz AC-coupled signal chains due to chopping artifacts. | Choose OPA2189IDR for microvolt-level DC accuracy over temperature; LTC6244HMS8#PBF for wideband analog front-ends requiring speed + low 1/f noise. |
Compared with ADA4898-2ARMZ and OPA2189IDR, the LTC6244HMS8#PBF uniquely balances 50MHz bandwidth, 1.5μVP-P 0.1–10Hz noise, and 1pA bias current - making it optimal for high-speed, high-impedance sensor interfaces where both precision and bandwidth are simultaneously critical.
Availability
LTC6244HMS8#PBF is available at Aetrix Electronics and suitable for photodiode amplification, medical instrumentation, and active filter design requiring stable component supply across extended temperature ranges.
Supply support for LTC6244HMS8#PBF 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6244 product line was designed by ADI's Linear Technology division specifically for demanding low-noise, high-speed precision applications - including optical sensing, medical diagnostics, and test equipment - where rail-to-rail output, ultra-low bias current, and wide temperature operation are essential.
FAQ
What is the maximum operating temperature specification for the LTC6244HMS8#PBF?
The LTC6244HMS8#PBF is rated for continuous operation from –40°C to +125°C ambient temperature, with full electrical specifications guaranteed across this range. Its MS8 package has a junction-to-ambient thermal resistance (θJA) of 250°C/W, requiring appropriate PCB copper area for thermal management at elevated temperatures.
Does the LTC6244HMS8#PBF support single-supply operation?
Yes, the LTC6244HMS8#PBF supports true single-supply operation from 2.8V to 6V. Its input common-mode range extends to the negative rail (V–), and its rail-to-rail output swings within 35mV of both supply rails - enabling use in 3.3V or 5V systems without level-shifting circuitry.
What is the typical input bias current of the LTC6244HMS8#PBF at 125°C?
The LTC6244HMS8#PBF maintains exceptionally low input bias current across temperature: 1pA typical at 25°C and ≤2pA maximum at +125°C (per Electrical Characteristics table on page 6 of the datasheet), ensuring minimal error in high-impedance sensor interfaces even under extreme thermal conditions.
Can the LTC6244HMS8#PBF drive capacitive loads directly?
The LTC6244HMS8#PBF is not unity-gain stable into heavy capacitive loads. For loads >100pF, external series resistance (e.g., 10–50Ω) is recommended at the output to prevent peaking or oscillation - as validated in Figure G30–G32 of the datasheet. Stability with photodiode capacitance is achieved via proper transimpedance layout and feedback network design.
How does the LTC6244HMS8#PBF compare to the LTC6244HV variant?
The LTC6244HMS8#PBF is the standard-voltage version (2.8V–6V supply), while the LTC6244HVHMS8#PBF supports ±5V operation (±2.5V to ±5.25V). Both share identical noise, bandwidth, and bias current specs, but the HV variant adds extended common-mode input range (–5V to +3.5V) and higher short-circuit current (40–55mA vs. 20–25mA).
LTC6244HMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 35V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 6.25mA (x2 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6244HMS8#PBF FAQ
1.How can I place an order for LTC6244HMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6244HMS8#PBF 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 LTC6244HMS8#PBF reliable?
The price and inventory of LTC6244HMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6244HMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6244HMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6244HMS8#PBF transactions.
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4.How is shipping managed for LTC6244HMS8#PBF?
LTC6244HMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6244HMS8#PBF 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 LTC6244HMS8#PBF?
For technical support, including LTC6244HMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6244HMS8#PBF requirements.
6.How does Aetrix verify that LTC6244HMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6244HMS8#PBF 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 LTC6244HMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6244HMS8#PBF?
All LTC6244HMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6244HMS8#PBF, 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 LTC6244HMS8#PBF part is unused and in its original packaging.
Return procedure for LTC6244HMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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