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Analog Devices Inc. LTC6244IMS8#PBF
- Part No.:
- LTC6244IMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6244IMS8#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:849
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Product details
Overview
LTC6244IMS8#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 ±40°C to +85°C operation in an 8-lead MSOP package - ideal for photodiode amplification and precision sensor front-ends.
For engineers reviewing the LTC6244IMS8#PBF datasheet, LTC6244IMS8#PBF pinout, LTC6244IMS8#PBF application, or LTC6244IMS8#PBF equivalent, this page provides verified specifications, package-validated pin functions, real-world use cases in transducer interfacing and active filtering, and two confirmed alternative op amps with documented performance trade-offs.
Technical Context
The LTC6244IMS8#PBF employs a low-noise folded-cascode input stage with laser-trimmed offset, enabling rail-to-rail output swing within 35mV of either supply while maintaining input common-mode range to the negative rail. Its CMOS architecture ensures ultra-low input bias current and 2.1pF input capacitance - critical for high-impedance photodiode and piezoelectric sensor interfaces.
It features internal compensation for unity-gain stability across 2.8V to 6V single-supply or ±2.5V to ±5V dual-supply operation, with guaranteed 50MHz GBW and 330ns settling time to 0.1% for 2V steps. The MS8 package variant is specified over –40°C to +85°C with max 100μV offset and 2.5μV/°C drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50MHz - supports stable closed-loop operation up to 50MHz at unity gain, enabling wideband active filters and fast pulse amplification. |
| Slew Rate | 40V/μs - enables clean reproduction of 10VPP signals up to ~3.2MHz without slewing distortion. |
| Input Bias Current | 1pA (typ @ 25°C) - preserves signal integrity in >1GΩ source impedance applications like photodiode and pH electrode circuits. |
| 0.1Hz–10Hz Noise | 1.5μVP-P - minimizes baseline drift in DC-coupled, low-frequency instrumentation such as medical ECG front-ends. |
| Input Offset Voltage | 100μV (max) - ensures <±0.1% error in 100mV full-scale sensor outputs without external trimming. |
| Supply Range | 2.8V to 6V (single), ±2.5V to ±5V (dual) - operates from Li-ion battery voltage down to brownout threshold with rail-to-rail output. |
| Output Swing | Within 35mV of rails (ISINK/ISOURCE = 1mA) - maximizes dynamic range in low-voltage systems, e.g., 3.3V ADC drivers. |
Pinout & Package
Package: 8-Lead Plastic MSOP (MS8), 3mm × 3mm body, exposed pad optional (connected to V– per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Delivers rail-to-rail output voltage; capable of sourcing/sinking ≥1mA with <35mV saturation. |
| 2 - –IN A | Inverting input A | High-impedance CMOS node; differential input capacitance = 2.1pF, bias current = 1pA. |
| 3 - +IN A | Non-inverting input A | Same electrical characteristics as –IN A; common-mode range extends to V–. |
| 4 - V– | Negative supply / ground reference | Power return path; exposed pad (Pin 9) is internally connected to V– and may be PCB-connected for thermal relief. |
| 5 - V+ | Positive supply | Accepts 2.8V–6V single supply or positive rail of ±2.5V–±5V dual supply; PSRR = 75dB min. |
| 6 - OUT B | Amplifier B output | Independent output identical to OUT A; channel-to-channel offset match ≤160μV (typ). |
| 7 - –IN B | Inverting input B | Matched to –IN A; CMRR = 74dB min, ensuring rejection of shared-mode interference in dual-channel designs. |
| 8 - +IN B | Non-inverting input B | Matched to +IN A; input resistance = 1012Ω, enabling direct connection to high-Z sources. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Operates within 35mV of V+ and V– at 1mA load - preserves >98% of available voltage headroom in 3.3V systems. |
| Ultra-low 1/f noise | 1.5μVP-P (0.1Hz–10Hz) - avoids baseline wander in DC-coupled sensor amplifiers where chopper-stabilized amps introduce switching artifacts. |
| Low input capacitance | 2.1pF common-mode - reduces phase margin degradation when driving capacitive loads (e.g., long cables, ADC inputs) without added isolation resistors. |
| Wide supply range | 2.8V to 6V single supply - supports direct interface with 3.3V microcontrollers and battery-powered portable instruments. |
| Specified –40°C to +85°C | Guaranteed performance across industrial temperature range - eliminates derating concerns in outdoor or under-hood applications. |
Applications
| Photodiode Amplifier | Active Filter Stage |
|---|---|
|
Use Scenario: Amplifying low-level current from Hamamatsu S1227-1010BQ large-area photodiode (CPD = 3000pF) in optical smoke detection. IC Role / Device Role: Transimpedance amplifier with 1MΩ feedback resistor, configured as unity-gain stable inverting stage. Use Value: 1pA input bias current prevents dark-current error; 1.5μVP-P noise ensures sub-10nA resolution at 10Hz bandwidth. |
Use Scenario: 4th-order low-pass filter (10kHz cutoff) for anti-aliasing before 100kSPS SAR ADC in data acquisition system. IC Role / Device Role: Dual op amp implementing two 2nd-order Sallen-Key stages with matched component ratios. Use Value: 50MHz GBW and 40V/μs slew rate maintain filter group delay flatness and step response fidelity up to 10kHz. |
| Medical Instrumentation Front-End | High-Impedance Transducer Interface |
|
Use Scenario: First-stage amplification of dry-electrode EEG signals (source Z > 100MΩ) in wearable neuro-monitor. IC Role / Device Role: Non-inverting buffer with guard-driven shield to minimize leakage-induced offset drift. Use Value: 2.1pF input capacitance and 1012Ω input resistance prevent signal attenuation and phase shift at electrode interface. |
Use Scenario: Signal conditioning for piezoresistive pressure sensor (output 20mV full-scale, ZOUT = 5kΩ) in HVAC control module. IC Role / Device Role: Precision non-inverting amplifier with gain = 100, referenced to ratiometric 2.5V ADC reference. Use Value: 100μV max offset and 2.5μV/°C drift ensure <±0.1% total error over –25°C to +70°C operating range. |
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 2.7nV/√Hz noise (vs. 12nV/√Hz typ for LTC6244IMS8#PBF); 2.5mA supply current (vs. 7.4mA). | Better for >100MHz small-signal AC coupling; less suitable for DC-coupled photodiode amps due to higher noise floor. | Select ADA4898-2ARMZ only when bandwidth >200MHz is required and 1/f noise is not critical. |
| OPA2189IDR | Zero-drift architecture; 0.005μV/°C drift (vs. 2.5μV/°C); 5.6nV/√Hz noise (vs. 12nV/√Hz); 5.6mA supply current. | Superior DC accuracy for <1Hz applications; slower 2.7MHz GBW limits use in >100kHz active filters. | Choose OPA2189IDR for sub-microvolt offset stability over temperature, but avoid where >10MHz signal bandwidth is needed. |
Compared with ADA4898-2ARMZ and OPA2189IDR, the LTC6244IMS8#PBF uniquely balances 50MHz bandwidth, 1pA bias current, and 1.5μVP-P 0.1Hz–10Hz noise - making it optimal for high-Z, wideband, DC-coupled sensor interfaces where neither pure speed nor pure DC precision dominates.
Availability
LTC6244IMS8#PBF is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation front-ends, and active filter designs requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LTC6244IMS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC6244IMS8#PBF belongs to Linear Technology's precision high-speed op amp family, engineered specifically for low-noise, rail-to-rail signal conditioning in demanding sensor, medical, and test equipment applications.
FAQ
What is the maximum supply voltage for the LTC6244IMS8#PBF?
The LTC6244IMS8#PBF has an absolute maximum total supply voltage (V+ to V–) of 7V. It is fully specified for operation from 2.8V to 6V on single supply, or ±2.5V to ±5V on dual supply. Exceeding 6V on single supply or ±5V on dual supply risks permanent damage per Absolute Maximum Ratings.
Does the LTC6244IMS8#PBF support rail-to-rail input common-mode range?
No - the LTC6244IMS8#PBF supports rail-to-rail *output* swing but its input common-mode range extends only to the negative rail (V–) and up to V+ – 1.5V. For example, with 5V supply, valid input range is 0V to 3.5V. Input voltages beyond this range degrade CMRR and may cause instability.
Can the LTC6244IMS8#PBF drive capacitive loads directly?
The LTC6244IMS8#PBF can drive moderate capacitive loads (≤100pF) without external isolation, but larger loads (>200pF) require a series resistor (e.g., 10Ω–50Ω) between output and load to maintain stability. Datasheet Figure 30–32 shows overshoot vs. capacitive load with and without series resistance.
What is the typical input bias current of the LTC6244IMS8#PBF at 85°C?
The LTC6244IMS8#PBF maintains ultra-low input bias current across temperature: 1pA typical at 25°C and ≤75pA maximum at –40°C to +85°C (per Electrical Characteristics table, MS8 package, I-grade). This enables reliable operation in high-impedance circuits even at elevated ambient temperatures.
Is the exposed pad on the MS8 package of the LTC6244IMS8#PBF electrically connected?
Yes - the exposed pad (Pin 9) on the LTC6244IMS8#PBF MS8 package is internally connected to V–. Datasheet Pin Configuration explicitly states "EXPOSED PAD (PIN 9) CONNECTED TO V–", and PCB connection is optional but recommended for improved thermal performance and lower junction temperature.
LTC6244IMS8#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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6244IMS8#PBF FAQ
1.How can I place an order for LTC6244IMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6244IMS8#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 LTC6244IMS8#PBF reliable?
The price and inventory of LTC6244IMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6244IMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6244IMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6244IMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6244IMS8#PBF?
LTC6244IMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6244IMS8#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 LTC6244IMS8#PBF?
For technical support, including LTC6244IMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6244IMS8#PBF requirements.
6.How does Aetrix verify that LTC6244IMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6244IMS8#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 LTC6244IMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6244IMS8#PBF?
All LTC6244IMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6244IMS8#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 LTC6244IMS8#PBF part is unused and in its original packaging.
Return procedure for LTC6244IMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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