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Analog Devices Inc. LTC6800HDD#PBF
- Part No.:
- LTC6800HDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC6800HDD#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:212
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Product details
Overview
LTC6800HDD#PBF from Analog Devices (formerly Linear Technology) is a precision rail-to-rail input/output instrumentation amplifier optimized for high-accuracy signal conditioning in harsh industrial and automotive environments. It delivers 116dB CMRR independent of gain, ≤100µV input offset voltage, <250nV/°C offset drift, and operates from –40°C to 125°C on a 2.7V–5.5V supply. It is used in thermocouple amplification, strain gauge interfaces, and high-resolution data acquisition where DC precision and temperature stability are critical.
For engineers reviewing the LTC6800HDD#PBF datasheet, LTC6800HDD#PBF pinout, LTC6800HDD#PBF application, or LTC6800HDD#PBF equivalent, key selection criteria include guaranteed offset drift over full temperature range, rail-to-rail common-mode input capability up to supply rails, internal zero-drift architecture, DFN package thermal performance, and compatibility with low-source-impedance sensor bridges requiring minimal external components.
Technical Context
The LTC6800HDD#PBF employs charge-balanced sampled-data techniques to translate differential input voltage into a single-ended signal, which is then amplified by an internal zero-drift op amp. Its CMRR remains stable at 116dB across gain settings and common-mode voltages from rail-to-rail, with no degradation below 100mV from rails except above 70°C.
Gain is set externally via two resistors connected to RG and REF pins, supporting unity to high gain configurations. Input bias current is integrated and specified at ≤10nA, while internal sampling frequency is fixed at 3kHz - enabling precise low-frequency measurement without aliasing concerns in static or slowly varying sensor applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CMRR | 116dB typical, independent of gain - ensures rejection of common-mode noise even at high gains and full rail-to-rail input range. |
| Input Offset Voltage | ±100µV max - enables accurate measurement of µV-level signals from sensors like thermocouples or strain gauges. |
| Offset Drift | ±250nV/°C max (–40°C to 85°C) - guarantees stable DC accuracy across wide ambient temperature swings. |
| Supply Range | 2.7V to 5.5V - supports direct operation from 3.3V or 5V system rails without LDO overhead. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive, industrial motor control, and battery management systems. |
| Output Swing | Rail-to-rail (20mV low, 4.98V high @ 5V supply) - maximizes dynamic range for ADC interfacing with minimal headroom loss. |
| Supply Current | 1.3mA max - balances precision performance with moderate power consumption in always-on monitoring circuits. |
Pinout & Package
The LTC6800HDD#PBF is housed in an 8-lead 3mm × 3mm × 0.8mm plastic DFN package (DD) with exposed pad internally connected to V–. This package provides enhanced thermal dissipation and compact footprint for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC (Pin 1) | No-connect terminal | Must remain unconnected; no internal function or bond wire. |
| –IN (Pin 2) | Inverting input | Differential input node; accepts rail-to-rail common-mode voltage up to supply rails. |
| +IN (Pin 3) | Noninverting input | Differential input node; matched to –IN for optimal CMRR and input bias cancellation. |
| V– (Pin 4) | Negative supply | Ground reference for internal circuitry and output swing; connects to exposed thermal pad. |
| REF (Pin 5) | Reference voltage input | Sets output common-mode level; defines zero point for amplified differential signal. |
| RG (Pin 6) | Inverting input of internal op amp | Connects external feedback resistor to set closed-loop gain; enables programmable gain configuration. |
| OUT (Pin 7) | Amplifier output | Single-ended rail-to-rail output; drives ADC inputs or downstream signal chains directly. |
| V+ (Pin 8) | Positive supply | Primary power rail; requires 0.1µF ceramic bypass capacitor placed between V+ and V– with shortest possible trace. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from V– to V+, eliminating need for level-shifting in single-supply sensor interfaces. |
| Zero-drift internal amplifier core | Enables long-term DC stability and eliminates 1/f noise - critical for precision weighing and medical instrumentation. |
| Guaranteed CMRR over temperature | 113dB min (–40°C to 125°C) ensures consistent noise immunity in automotive under-hood environments. |
| Internal 3kHz sampling clock | Fixed-frequency switched-capacitor front-end simplifies anti-aliasing filter design and avoids external clock dependencies. |
| Low input bias current mismatch | Integrated input offset current ≤3nA ensures minimal error from source resistance imbalance in bridge circuits. |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying microvolt-level Seebeck voltage from K-type thermocouples in furnace temperature monitoring systems operating from –40°C to 125°C ambient. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing gain, offset compensation, and common-mode rejection before 16-bit SAR ADC digitization. Use Value: ±100µV offset and <250nV/°C drift enable ±0.5°C measurement accuracy over full industrial temperature range without calibration. |
Use Scenario: Reading Wheatstone bridge outputs from load cells in industrial electronic scales with 0.01% full-scale resolution requirement. IC Role / Device Role / Timing Role: Differential-to-single-ended converter with programmable gain, referenced to stable internal VREF for ratiometric accuracy. Use Value: 116dB CMRR rejects bridge excitation noise and EMI; rail-to-rail input accommodates bridge common-mode shift during overload conditions. |
| High-Resolution Data Acquisition | Medical Instrumentation Front-End |
|
Use Scenario: Signal conditioning stage in portable battery-powered DAQ modules measuring pH electrodes, RTDs, and other low-level analog sensors. IC Role / Device Role / Timing Role: Low-power, high-precision gain block with minimal external components - only RG and REF resistors required for gain setting. Use Value: 1.3mA supply current and 2.7V minimum operation extend battery life; zero-drift architecture maintains calibration integrity over months of field use. |
Use Scenario: Biopotential signal amplification in ECG/EMG patient monitors requiring FDA-compliant DC accuracy and safety isolation. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier providing high CMRR, low noise, and galvanic isolation interface compatibility. Use Value: Input-referred noise of 2.5µVP-P (DC–10Hz) and <10nA input bias current minimize electrode polarization errors and motion artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2053IMS8#PBF | Lower offset (10µV max), lower drift (50nV/°C), but limited to 125°C max junction temperature and MS8-only packaging. | Better DC specs but narrower temp range; not qualified for 125°C ambient automotive use cases. | Select LTC2053IMS8#PBF only when ambient temperature stays ≤85°C and ultra-low offset is prioritized over extended temperature qualification. |
| LT1167CS8#PBF | Higher supply current (1.3mA vs 1.2mA), fixed 10/100 gain options, no rail-to-rail input - requires level-shifting for single-supply operation. | Requires additional external circuitry for rail-to-rail input support; less suitable for direct sensor-to-ADC interfaces. | Choose LT1167CS8#PBF when gain is fixed and board space allows level-shifting components; avoid when minimizing BOM count is critical. |
Compared with LTC2053IMS8#PBF and LT1167CS8#PBF, the LTC6800HDD#PBF uniquely combines guaranteed 125°C operation, rail-to-rail input, and 116dB CMRR independent of gain - making it the only option qualified for high-temperature, low-component-count, high-precision sensor front-ends without external support circuitry.
Availability
LTC6800HDD#PBF is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, and high-resolution data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6800HDD#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 continues its legacy of high-performance analog ICs. The company specializes in precision signal conditioning, power management, and data conversion solutions for demanding industrial, automotive, and medical applications.
The LTC6800HDD#PBF belongs to Linear's precision instrumentation amplifier product line, designed specifically for DC-critical sensor interfaces where offset, drift, CMRR, and temperature robustness outweigh raw speed requirements.
FAQ
What is the maximum operating temperature range for the LTC6800HDD#PBF?
The LTC6800HDD#PBF is fully specified and guaranteed functional from –40°C to 125°C ambient temperature. This rating is explicitly confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section, where parameters marked with "l" apply across this full range. The device uses the H-grade temperature qualification, making it suitable for under-hood automotive and industrial control applications.
Does the LTC6800HDD#PBF require an external clock source?
No, the LTC6800HDD#PBF does not require an external clock. It incorporates an internal 3kHz sampling clock used in its charge-balanced switched-capacitor front-end. This eliminates timing dependency on external sources and simplifies system design - no clock routing, synchronization, or jitter concerns are introduced when using the LTC6800HDD#PBF in precision DC measurement applications.
Can the LTC6800HDD#PBF operate with a 3.3V supply?
Yes, the LTC6800HDD#PBF operates from 2.7V to 5.5V, so it functions correctly with a nominal 3.3V supply. At 3.3V, the output swing is guaranteed to be ≥3.0V high and ≤20mV low (referenced to V–), preserving >90% of full-scale dynamic range for interfacing with 3.3V ADCs. Supply current remains within 1.3mA specification across this voltage range.
How is gain configured on the LTC6800HDD#PBF?
Gain on the LTC6800HDD#PBF is set externally using two resistors: one between RG (Pin 6) and OUT (Pin 7), and another between RG and REF (Pin 5). The gain equation is G = 1 + R2/R1, where R2 connects RG to OUT and R1 connects RG to REF. This architecture mirrors traditional op-amp feedback, allowing flexible gain selection from unity upward without requiring special programming interfaces.
Is the DFN package of the LTC6800HDD#PBF thermally enhanced?
Yes, the DD package of the LTC6800HDD#PBF features an exposed metal pad on the underside that is internally connected to V–. When soldered to a PCB copper pour tied to the system ground plane, this pad significantly improves thermal resistance (θJA = 160°C/W), enabling reliable operation at elevated ambient temperatures and higher quiescent power dissipation without derating.
LTC6800HDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.3mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC6800HDD#PBF FAQ
1.How can I place an order for LTC6800HDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6800HDD#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 LTC6800HDD#PBF reliable?
The price and inventory of LTC6800HDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6800HDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6800HDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6800HDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6800HDD#PBF?
LTC6800HDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6800HDD#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 LTC6800HDD#PBF?
For technical support, including LTC6800HDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6800HDD#PBF requirements.
6.How does Aetrix verify that LTC6800HDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6800HDD#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 LTC6800HDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6800HDD#PBF?
All LTC6800HDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6800HDD#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 LTC6800HDD#PBF part is unused and in its original packaging.
Return procedure for LTC6800HDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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