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Analog Devices Inc. LTC6244HVHDD#PBF
- Part No.:
- LTC6244HVHDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC6244HVHDD#PBF.pdf
- Description:
- IC CMOS 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:355
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Product details
Overview
LTC6244HVHDD#PBF from Analog Devices (acquired Linear Technology) is a dual, high-speed, rail-to-rail output CMOS operational amplifier optimized for low-noise, high-precision signal conditioning in ±5V supply systems. It delivers 50MHz gain bandwidth, 40V/μs slew rate, 1pA input bias current, 1.5μVP-P (0.1Hz–10Hz) noise, and 100μV max input offset voltage over –40°C to +125°C - enabling photodiode amplification, charge-coupled signal processing, and medical instrumentation front-ends.
For engineers reviewing the LTC6244HVHDD#PBF datasheet, LTC6244HVHDD#PBF pinout, LTC6244HVHDD#PBF application, or LTC6244HVHDD#PBF equivalent, key selection criteria include its HV-rated ±5V operation, DFN-8 (3mm × 3mm) package with exposed pad, guaranteed 125°C junction temperature, and low-input-capacitance (2.1pF common-mode) architecture suitable for high-impedance transducer interfaces.
Technical Context
The LTC6244HVHDD#PBF employs a folded-cascode input stage with laser-trimmed MOSFETs to achieve ultra-low input bias current and low 1/f noise. Its differential drive generator enables rail-to-rail output swing within 35mV of either supply rail under load, while maintaining unity-gain stability without external compensation.
Designed for high-voltage operation, it supports total supply voltages up to 12V (±5.25V), extends input common-mode range to the negative rail (V–), and guarantees performance across –40°C to +125°C - distinguishing it from standard LTC6244 variants rated only to 85°C or lower supply ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 50MHz - enables stable closed-loop operation at ≥10MHz with moderate gain (e.g., G = 5) in precision wideband filters or active anti-aliasing stages. |
| Slew Rate | 40V/μs - supports full-scale 3VP-P output at ≥1.9MHz without slewing distortion in fast-settling data acquisition paths. |
| Input Offset Voltage | 100μV max - ensures ≤0.02% gain error in 500mV full-scale sensor signal chains without trimming. |
| 0.1Hz–10Hz Noise | 1.5μVP-P - preserves DC accuracy and low-frequency resolution in photodiode or strain gauge amplifiers with integration times >100ms. |
| Input Bias Current | 1pA typ at 25°C - minimizes voltage error across >1GΩ source impedances (e.g., piezoelectric sensors or high-R feedback networks). |
| Supply Range | ±2.5V to ±5.25V - allows direct interfacing with bipolar analog front-ends (e.g., ADC drivers, level-shifting DAC outputs) without external regulators. |
| Input Capacitance | 2.1pF common-mode - reduces phase shift and peaking in capacitive transducer (e.g., MEMS mic, pyroelectric) interfaces. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN (LCGD), exposed thermal pad connected to V–.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Rail-to-rail capable; sinks/source up to 10mA; requires local 0.1μF bypass near pin. |
| 2: –IN A | Inverting input A | High-impedance node; sensitive to PCB leakage; guard ring recommended for <1pA applications. |
| 3: +IN A | Non-inverting input A | Matches –IN A in offset and drift; differential input capacitance is 3.5pF. |
| 4: V– | Negative supply | Reference for exposed pad; must be low-impedance; connects internally to ESD diodes. |
| 5: V+ | Positive supply | Accepts up to +5.25V; decoupling critical due to 9.3mA total supply current (4.65mA per amp). |
| 6: OUT B | Amplifier B output | Electrically isolated from OUT A; channel-to-channel crosstalk < –100dB at 1MHz. |
| 7: –IN B | Inverting input B | Matched to –IN A (max 1165μV offset difference); enables precision differential gain stages. |
| 8: +IN B | Non-inverting input B | Same layout-sensitive routing requirements as +IN A; shares same ESD protection structure. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Within 35mV of V+ and V– at 1mA load - maximizes dynamic range in low-supply (±2.5V) medical battery-powered systems. |
| Ultra-low input bias current | 1pA typical at 25°C - eliminates significant error in >10GΩ feedback networks used in electrometer-grade pH or ion-selective electrode circuits. |
| Low 1/f noise | 1.5μVP-P (0.1Hz–10Hz) - enables stable DC-coupled amplification of slow-varying biopotentials (ECG, EEG) without chopper-induced artifacts. |
| High CMRR | 80dB min (–5V ≤ VCM ≤ 3.5V) - rejects common-mode interference in single-ended sensor bridges referenced to noisy digital grounds. |
| Extended temperature grade | Specified from –40°C to +125°C - supports under-hood automotive sensing, industrial motor control feedback, and downhole oilfield electronics. |
Applications
| Photodiode Amplifier | Charge-Coupled Amplifier |
|---|---|
Use Scenario: Amplifying weak current from large-area Hamamatsu S1227-1010BQ photodiode (CPD = 3000pF) in optical smoke detection. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1MΩ feedback; sets system bandwidth (350kHz) and noise floor (291nV at 10kHz). Use Value: 1pA input bias avoids saturation from dark current; 2.1pF input capacitance minimizes peaking with high-CPD sources. | Use Scenario: Buffering and amplifying charge packets from CCD imaging arrays in portable X-ray detectors. IC Role / Device Role / Timing Role: Low-noise, fast-settling (330ns @ 0.1%) follower driving 100pF+ sampling capacitors. Use Value: 40V/μs slew rate prevents droop during rapid charge transfer; rail-to-rail swing preserves full CCD output range. |
| Medical Instrumentation Front-End | High-Impedance Transducer Amplifier |
Use Scenario: First-stage amplification of microvolt-level EEG signals in dry-electrode wearable headsets. IC Role / Device Role / Timing Role: DC-coupled, low-noise non-inverting amplifier (G = 100) with active guarding. Use Value: 1.5μVP-P 0.1Hz–10Hz noise ensures baseline stability; 125°C rating supports internal device self-heating. | Use Scenario: Signal conditioning for piezoresistive pressure sensors in HVAC differential-pressure monitoring. IC Role / Device Role / Timing Role: High-input-impedance buffer (Zin > 1012Ω) isolating Wheatstone bridge from ADC input. Use Value: 1pA bias current prevents >1mV offset error across 1GΩ bridge elements; ±5V operation matches industrial supply rails. |
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 2.9nV/√Hz input noise (vs. 12nV/√Hz typ for LTC6244HVHDD#PBF); 2.2pA IB; operates on ±5V but not specified to 125°C. | Better for RF/IF gain blocks; unsuitable for precision DC-coupled medical sensors requiring sub-2μVP-P low-f noise. | Select ADA4898-2ARMZ only when bandwidth >100MHz is mandatory and low-frequency noise is secondary. |
| OPA211IDR | Lower 1.1nV/√Hz noise but 2.5pA IB; 45MHz GBW; rated only to 105°C; requires ≥±2.25V supplies (not ±5V optimized). | Preferred for ultra-low-noise audio preamps; lacks HV robustness and extended temp grade for harsh environments. | Choose OPA211IDR for battery-powered audio where power efficiency and voltage noise dominate; avoid for ±5V industrial or automotive use. |
Compared with ADA4898-2ARMZ and OPA211IDR, the LTC6244HVHDD#PBF uniquely balances 50MHz bandwidth, 1.5μVP-P low-frequency noise, 1pA bias, ±5V operation, and full –40°C to +125°C qualification - making it the only option qualified for high-reliability, wide-temperature, high-impedance sensor signal chains.
Availability
LTC6244HVHDD#PBF is available at Aetrix Electronics and suitable for photodiode amplification, medical instrumentation front-ends, and high-impedance transducer signal conditioning requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC6244HVHDD#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 family was designed by Linear Technology (now ADI) specifically for precision, high-speed, low-noise amplification in demanding sensor interface and instrumentation applications - emphasizing rail-to-rail output, ultra-low input bias, and robust high-voltage operation.
FAQ
What is the maximum supply voltage rating for the LTC6244HVHDD#PBF?
The LTC6244HVHDD#PBF supports a total supply voltage of up to 12V, corresponding to ±5.25V operation. This distinguishes it from standard LTC6244 variants (e.g., LTC6244HDD#PBF), which are limited to 7V (±3.5V). Absolute maximum ratings specify V+ to V– = 12V, with indefinite short-circuit capability when thermally managed.
Does the LTC6244HVHDD#PBF support rail-to-rail input common-mode voltage?
No - the LTC6244HVHDD#PBF features rail-to-rail *output* swing but has an input common-mode range extending from V– to V+ – 1.5V. At ±5V supplies, this means the input can go as low as –5V but only as high as +3.5V. Exceeding this upper limit may cause instability or phase inversion, especially in unity-gain configurations.
What is the guaranteed operating temperature range for the LTC6244HVHDD#PBF?
The LTC6244HVHDD#PBF is fully specified and guaranteed over –40°C to +125°C ambient temperature. This high-temperature qualification is confirmed in the "ORDER INFORMATION" table (LTC6244HVHDD#PBF → –40°C to 125°C) and electrical characteristics sections labeled "(LTC6244HVH)", making it suitable for under-hood automotive, industrial motor control, and downhole electronics applications.
How does the input bias current of the LTC6244HVHDD#PBF behave over temperature?
The LTC6244HVHDD#PBF exhibits 1pA typical input bias current at 25°C, rising to ≤2pA at 125°C per the "ELECTRICAL CHARACTERISTICS" table on page 8. This low, stable IB is enabled by CMOS input architecture and reverse-biased ESD diodes - critical for preserving accuracy in high-impedance sensor interfaces where IB-induced errors scale linearly with source resistance.
Is the exposed thermal pad on the LTC6244HVHDD#PBF's DFN package required to be connected?
Yes - the exposed pad (Pin 9, labeled "EXPOSED PAD (PIN 9) CONNECTED TO V–") must be soldered to a PCB copper pour tied to V– for thermal and electrical integrity. The datasheet specifies θJA = 43°C/W *only* when the pad is properly connected; omitting this connection degrades thermal performance and risks exceeding the 150°C absolute maximum junction temperature under load.
LTC6244HVHDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 40V/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):
- 5.25 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC6244HVHDD#PBF FAQ
1.How can I place an order for LTC6244HVHDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6244HVHDD#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 LTC6244HVHDD#PBF reliable?
The price and inventory of LTC6244HVHDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6244HVHDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6244HVHDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6244HVHDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6244HVHDD#PBF?
LTC6244HVHDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6244HVHDD#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 LTC6244HVHDD#PBF?
For technical support, including LTC6244HVHDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6244HVHDD#PBF requirements.
6.How does Aetrix verify that LTC6244HVHDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6244HVHDD#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 LTC6244HVHDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6244HVHDD#PBF?
All LTC6244HVHDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6244HVHDD#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 LTC6244HVHDD#PBF part is unused and in its original packaging.
Return procedure for LTC6244HVHDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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