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Analog Devices Inc. LTC6244CMS8#PBF
- Part No.:
- LTC6244CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6244CMS8#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:884
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Product details
Overview
LTC6244CMS8#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 typical input bias current, 1.5μVP-P 0.1Hz–10Hz noise, and operates from 2.8V to 6V single supply - making it ideal for photodiode amplification in precision optical sensing systems.
For engineers reviewing the LTC6244CMS8#PBF datasheet, LTC6244CMS8#PBF pinout, LTC6244CMS8#PBF application, or LTC6244CMS8#PBF equivalent, key selection criteria include its ultra-low input bias current for high-impedance transducer interfaces, guaranteed rail-to-rail output swing within 35mV of rails, and MS8 package compatibility with space-constrained analog front-ends in medical instrumentation and test equipment.
Technical Context
The LTC6244CMS8#PBF employs a folded-cascode input stage with laser-trimmed MOSFETs to achieve low offset voltage (≤100μV) and minimal drift (≤2.5μV/°C), while maintaining full rail-to-rail output swing via a differential drive generator. Its input common-mode range extends to the negative rail, enabling true single-supply operation in sensor interface circuits.
It features low input capacitance (2.1pF common-mode), high CMRR (≥74dB), and robust PSRR (≥75dB), ensuring stability and accuracy in noisy industrial environments. The device is fully specified at 0°C to 70°C for the C-grade MS8 variant and supports ±5V operation only in HV versions - not applicable to this specific part number.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50MHz - enables stable closed-loop operation up to 50MHz at unity gain for fast pulse amplification. |
| Slew Rate | 40V/μs - supports clean 3VP-P output signals up to ~3.2MHz full-power bandwidth without distortion. |
| Input Bias Current | 1pA (typ @ 25°C) - preserves signal integrity in >1GΩ source impedance applications like photodiode amps. |
| 0.1Hz–10Hz Noise | 1.5μVP-P - critical for low-frequency precision measurement where 1/f noise dominates. |
| Output Swing | Rail-to-rail, within 35mV of V+ and V− - maximizes dynamic range in low-voltage (2.8V–6V) systems. |
| Supply Voltage Range | 2.8V to 6V single supply - compatible with Li-ion, 3.3V, and 5V logic domains without level-shifting. |
| Input Offset Voltage | 100μV max (0°C to 70°C) - ensures <0.002% error in 5V full-scale precision gain stages. |
Pinout & Package
Package: 8-Lead Plastic MSOP (MS8), 3mm × 3mm footprint, exposed pad optional (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Drives external load; rail-to-rail swing supports maximum signal headroom. |
| 2 - –IN A | Inverting input A | High-impedance node; 2.1pF input capacitance minimizes phase shift in transimpedance configs. |
| 3 - +IN A | Non-inverting input A | Accepts high-Z sources; common-mode range extends to V− for true single-supply biasing. |
| 4 - V− | Negative supply | Reference for both amplifiers; exposed pad may be tied to V− for thermal improvement. |
| 5 - V+ | Positive supply | Supports 2.8V–6V operation; PSRR ≥75dB rejects supply ripple in mixed-signal PCBs. |
| 6 - OUT B | Amplifier B output | Independent output; channel-to-channel VOS match ≤160μV enables matched dual-path designs. |
| 7 - –IN B | Inverting input B | Electrically isolated from Channel A; enables dual-channel filtering or differential pair buffering. |
| 8 - +IN B | Non-inverting input B | Same specs as +IN A; allows simultaneous processing of two sensor signals with matched DC performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA typ enables accurate amplification of picoamp-level photocurrents without significant DC error. |
| Low 1/f noise | 1.5μVP-P (0.1Hz–10Hz) supports high-resolution DC-coupled measurements in medical ECG/EEG front-ends. |
| Rail-to-rail output | Swings within 35mV of V+ and V− on 2.8V supply - delivers >2.7V output range for optimal ADC utilization. |
| Laser-trimmed input offset | 100μV max over 0°C–70°C eliminates need for external nulling in production calibration. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces component count in gain-of-1 transimpedance amps. |
Applications
| Photodiode Amplification | Active Filter Design |
|---|---|
Use Scenario: Amplifying weak current from Hamamatsu S1227-1010BQ large-area photodiode (CPD = 3000pF) in optical smoke detection. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1MΩ feedback resistor; sets system bandwidth at 350kHz. Use Value: 1pA input bias avoids signal loss; 1.5μVP-P noise ensures SNR > 70dB at 10kHz for reliable particle discrimination. | Use Scenario: 4th-order low-pass filter for anti-aliasing before 16-bit SAR ADC in portable data loggers. IC Role / Device Role / Timing Role: Dual op-amp implementing two 2-pole Sallen-Key stages; each channel handles one filter section. Use Value: 50MHz GBW supports >100kHz filter cutoff with <0.1dB passband ripple; rail-to-rail output drives ADC reference directly. |
| Medical Instrumentation | High-Impedance Transducer Interface |
Use Scenario: Front-end amplifier for dry-electrode EEG acquisition with >100MΩ electrode-skin impedance. IC Role / Device Role / Timing Role: First-stage buffer and gain stage; configured as non-inverting amp with G = 10. Use Value: 2.1pF input capacitance minimizes peaking with high-Z sources; 100μV max VOS reduces baseline drift in long-duration recordings. | Use Scenario: Signal conditioning for piezoresistive pressure sensor with 2kΩ bridge output and mV-level sensitivity. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (dual op-amp in 3-op-amp IA topology); provides gain and common-mode rejection. Use Value: 74dB min CMRR suppresses supply-induced common-mode interference; 40V/μs slew rate preserves transient fidelity in dynamic pressure events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4898-2ARMZ | Higher 1GHz GBW but 2.4nV/√Hz noise at 1kHz; 10x higher supply current (18mA vs 7.4mA); SOIC-8 only. | Better for RF/IF gain stages; unsuitable for battery-powered low-noise DC apps due to power and noise trade-off. | Select only when >100MHz bandwidth is mandatory and power budget allows. |
| OPA2189IDR | Zero-drift architecture; 0.005μV/°C drift vs 2.5μV/°C; but 5.6nV/√Hz noise and 100pA IB limit photodiode use. | Superior for DC-stable thermocouple amps; cannot replace LTC6244CMS8#PBF in high-Z, low-noise AC-coupled sensor paths. | Choose for ultra-low drift in precision weigh scales; avoid where 1/f noise or pA bias current is critical. |
Compared with ADA4898-2ARMZ and OPA2189IDR, the LTC6244CMS8#PBF uniquely balances sub-pA input bias, 1.5μVP-P 1/f noise, and 50MHz bandwidth in an MS8 package - making it irreplaceable for photodiode and high-impedance transducer front-ends requiring both speed and ultra-low leakage.
Availability
LTC6244CMS8#PBF is available at Aetrix Electronics and suitable for photodiode amplification, active filter design, and medical instrumentation requiring stable component supply across extended production cycles.
Supply support for LTC6244CMS8#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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear parts including the LTC6244 series.
The LTC6244 product line was designed specifically for high-speed, low-noise, rail-to-rail op amp applications in precision analog signal chains - especially where ultra-low input bias current and wide supply range are essential.
FAQ
What is the maximum operating temperature range for the LTC6244CMS8#PBF?
The LTC6244CMS8#PBF is rated for operation from 0°C to 70°C (Commercial grade). It is not qualified for industrial (–40°C to 85°C) or automotive temperature ranges - those require the IMS8 or HMS8 variants. Thermal derating is required above 70°C ambient, as θJA = 250°C/W limits junction temperature under sustained load.
Does the LTC6244CMS8#PBF support dual ±5V supplies?
No, the LTC6244CMS8#PBF is specified only for single-supply operation from 2.8V to 6V. The ±5V capability applies exclusively to HV variants (e.g., LTC6244HVCMS8#PBF), which have different internal biasing and absolute maximum ratings. Using ±5V on LTC6244CMS8#PBF exceeds its 7V total supply rating and risks permanent damage.
Can the LTC6244CMS8#PBF drive capacitive loads directly?
The LTC6244CMS8#PBF can drive up to 100pF capacitive load with minimal overshoot (<10%) when series resistance (RS) ≥10Ω is used. Driving >100pF directly causes instability; for larger loads (e.g., ADC inputs), add a 10Ω–50Ω isolation resistor per output as shown in Figure 30 of the datasheet to maintain phase margin.
What is the input common-mode voltage range for the LTC6244CMS8#PBF?
For the LTC6244CMS8#PBF, the input common-mode voltage range extends from V− to (V+ − 1.5V) under normal operation. At 5V supply, this is 0V to 3.5V. Exceeding this range - especially approaching V+ - may cause instability or phase inversion, particularly in unity-gain follower configurations.
Is the exposed pad on the MS8 package of the LTC6244CMS8#PBF electrically connected?
No, the exposed pad on the LTC6244CMS8#PBF MS8 package is not electrically connected to any internal node. It is thermally conductive and may be soldered to a ground or power plane for improved thermal dissipation, but must not be used as a signal or supply connection. Datasheet confirms "PCB connection optional" and no internal bond wire attaches to it.
LTC6244CMS8#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6244CMS8#PBF FAQ
1.How can I place an order for LTC6244CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6244CMS8#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 LTC6244CMS8#PBF reliable?
The price and inventory of LTC6244CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6244CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6244CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6244CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6244CMS8#PBF?
LTC6244CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6244CMS8#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 LTC6244CMS8#PBF?
For technical support, including LTC6244CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6244CMS8#PBF requirements.
6.How does Aetrix verify that LTC6244CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6244CMS8#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 LTC6244CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6244CMS8#PBF?
All LTC6244CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6244CMS8#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 LTC6244CMS8#PBF part is unused and in its original packaging.
Return procedure for LTC6244CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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