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Analog Devices Inc. LTC2051IDD#TRPBF
- Part No.:
- LTC2051IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2051IDD#TRPBF.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,609
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Product details
Overview
LTC2051IDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual zero-drift operational amplifier in an 8-lead 3mm × 3mm DFN package, delivering 3μV max input offset voltage, 30nV/°C max offset drift, and 1.5μVP-P (0.01Hz–10Hz) input-referred noise. It operates from 2.7V single supply or ±5V dual supply and supports rail-to-rail output swing into 2kΩ loads-ideal for precision thermocouple amplification and low-side current sensing.
For engineers reviewing the LTC2051IDD#TRPBF datasheet, LTC2051IDD#TRPBF pinout, LTC2051IDD#TRPBF application, or LTC2051IDD#TRPBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, DFN thermal performance (θJA = 160°C/W), shutdown capability (3μA quiescent per amp), and chopper-stabilized architecture enabling DC-accurate signal conditioning without external trimming.
Technical Context
The LTC2051IDD#TRPBF employs autozeroing with a 7.5kHz internal sampling clock to continuously correct input offset and drift. Its dual-channel architecture shares no internal resources between amplifiers, ensuring independent DC accuracy and noise performance per channel.
It features extended common-mode input range (V– to V+ – 1.3V), high PSRR (130dB typ) and CMRR (130dB typ), and a 3MHz gain-bandwidth product with 2V/μs slew rate-enabling stable closed-loop operation in high-resolution data acquisition front-ends and active filter designs requiring sub-microvolt DC stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max ±3μV - enables direct measurement of mV-level sensor outputs (e.g., thermocouples, strain gauges) without nulling circuitry. |
| Offset Drift | Max ±30nV/°C - ensures <1μV total drift over full –40°C to 85°C operating range, critical for unattended industrial monitoring. |
| Noise (0.01Hz–10Hz) | 1.5μVP-P - supports 20+ bit effective resolution in DC-coupled data acquisition systems. |
| Supply Current (per amp) | 0.75mA typ at 3V - allows dual-channel precision amplification within tight power budgets (e.g., battery-powered instrumentation). |
| Gain-Bandwidth Product | 3MHz - supports stable unity-gain and moderate-gain configurations (e.g., G=100) up to ~30kHz without phase margin loss. |
| Output Swing | Rail-to-rail into 10kΩ; V+ – 0.02V / 15mV above V– - maximizes dynamic range when interfacing with 3.3V or 5V ADCs. |
| Common-Mode Rejection | 130dB typ - rejects >99.9999% of common-mode interference in noisy industrial environments. |
Pinout & Package
Package: 8-lead 3mm × 3mm × 0.8mm plastic DFN (DD) with exposed pad connected to V– (Pin 4). Thermal resistance θJA = 160°C/W with minimal PCB copper; enhanced heat spreading reduces junction temperature in continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Capable of driving 2kΩ load rail-to-rail; high-impedance state during shutdown. |
| 2: –IN A | Inverting input A | Low bias current (±150pA max) minimizes error from high-impedance sources like pH electrodes. |
| 3: +IN A | Non-inverting input A | Extended common-mode range (to V+ – 1.3V) enables direct sensing of signals near supply rails. |
| 4: V– | Negative supply / ground reference | Exposed thermal pad must be soldered to PCB ground plane for thermal and electrical integrity. |
| 5: V+ | Positive supply | Accepts 2.7V to 5.5V single supply or ±5V dual supply; PSRR >120dB maintains accuracy across supply ripple. |
| 6: OUT B | Amplifier B output | Independent output stage; no crosstalk with Channel A in typical layout. |
| 7: –IN B | Inverting input B | Same DC specs as Pin 2; supports differential pair configuration with matched external resistors. |
| 8: +IN B | Non-inverting input B | Enables dual-sensor readout (e.g., two RTDs) with shared supply and reference routing. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Autozeroing at 7.5kHz eliminates long-term drift and 1/f noise, enabling true DC-coupled operation without manual calibration. |
| Rail-to-rail output | Swings within 20mV of either rail into 10kΩ, preserving full ADC input range in 3.3V systems. |
| Shutdown mode | Reduces supply current to 3μA per amplifier (typ), allowing power gating in portable medical devices between measurements. |
| High PSRR/CMRR | 130dB rejection of supply noise and common-mode interference ensures accuracy in electrically noisy factory-floor environments. |
| DFN thermal performance | θJA = 160°C/W enables 750μA/channel operation at 85°C ambient without derating, unlike SO-8 alternatives. |
Applications
| Thermocouple Amplification | Electronic Scales |
|---|---|
Use Scenario: Amplifying microvolt-level J/K-type thermocouple outputs in industrial ovens with ambient temperature swings from –20°C to 70°C. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with cold-junction compensation interface; no AC coupling or drift-induced baseline shift. Use Value: ±3μV offset and ±30nV/°C drift ensure <±0.5°C measurement error over full temperature range without software correction. | Use Scenario: Reading bridge outputs from 350Ω load cells in commercial weighing platforms with 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation front-end; drives ADC reference and input simultaneously. Use Value: 1.5μVP-P noise and rail-to-rail output deliver >20 ENOB at 10SPS, exceeding NTEP Class III requirements. |
| Medical Instrumentation | Strain Gauge Amplifiers |
Use Scenario: Biopotential signal conditioning in portable ECG monitors where battery life and electrode DC offset stability are critical. IC Role / Device Role / Timing Role: First-stage amplifier for Ag/AgCl electrodes; provides high input impedance and ultra-low DC drift. Use Value: Sub-μV drift eliminates baseline wander during 5-minute patient recordings, reducing need for digital high-pass filtering. | Use Scenario: Full-bridge strain gauge readout in structural health monitoring sensors deployed on bridges and wind turbines. IC Role / Device Role / Timing Role: Dual-channel differential amplifier for ratiometric bridge excitation and output scaling. Use Value: Matched channel drift (<100nV/°C inter-channel) ensures stable differential gain over –40°C to 85°C outdoor operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual zero-drift op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2051IMS8#TRPBF | Same core specs but in 8-lead MSOP (3mm × 3mm × 1.1mm); θJA = 190°C/W; no exposed thermal pad. | Less efficient thermal dissipation in high-density layouts; requires larger PCB area for equivalent thermal relief. | Select when legacy MSOP footprint compatibility is required and ambient temperature stays below 70°C. |
| AD8628ARZ-REEL7 | Single 5V-supply zero-drift op amp (not dual); 1μV max offset; 0.5μVP-P noise; SO-8 only. | Requires two devices for dual-channel function; higher board area and BOM count; no shutdown feature. | Select only if single-channel operation suffices and lowest possible noise (0.5μVP-P) outweighs dual-channel integration and power savings. |
Compared with LTC2051IMS8#TRPBF, the LTC2051IDD#TRPBF offers superior thermal performance and smaller footprint; versus AD8628ARZ-REEL7, it delivers integrated dual-channel functionality with shutdown and lower system-level power consumption in space-constrained instrumentation.
Availability
LTC2051IDD#TRPBF is available at Aetrix Electronics and suitable for thermocouple amplification, electronic scales, and medical instrumentation requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for LTC2051IDD#TRPBF 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 technical and manufacturing continuity for all Linear precision analog products.
The LTC2051 series belongs to Linear's zero-drift op amp product line, designed specifically for DC-accurate signal conditioning in high-resolution measurement systems where traditional op amps fail due to drift and 1/f noise.
FAQ
What is the maximum operating temperature range for the LTC2051IDD#TRPBF?
The LTC2051IDD#TRPBF is specified for operation from –40°C to +85°C. This industrial temperature grade is confirmed in the "AVAILABLE OPTIONS" table and applies across all electrical parameters unless otherwise noted. The device's DFN package and internal design support reliable performance at the upper limit without derating, provided PCB thermal design meets θJA = 160°C/W requirements.
Does the LTC2051IDD#TRPBF include a shutdown feature?
No, the LTC2051IDD#TRPBF does not include a shutdown pin. Shutdown functionality is only available in the 10-lead MSOP variants (e.g., LTC2051CMS10#TRPBF). The DD package version has no dedicated SHDN pin; all eight pins are signal or supply terminals. Power control must be implemented externally via supply switching if needed.
What is the input common-mode voltage range of the LTC2051IDD#TRPBF?
The LTC2051IDD#TRPBF supports an input common-mode voltage range from V– to V+ – 1.3V. At 5V supply, this means inputs can swing from 0V to 3.7V; at 3V supply, from 0V to 1.7V. This extended range enables direct interfacing with sensors whose output approaches the positive rail, such as certain bridge configurations and current-sense amplifiers.
How does the LTC2051IDD#TRPBF handle clock feedthrough from its autozeroing circuit?
The LTC2051IDD#TRPBF uses a 7.5kHz autozeroing clock. Residual clock feedthrough is <1μVRMS input-referred at 7.5kHz. To minimize impact, keep source impedances below 10kΩ and use feedback capacitors to limit closed-loop bandwidth-both practices suppress both charge-injection and sampling-capacitor settling artifacts inherent to chopper-stabilized topologies.
Is the exposed pad on the LTC2051IDD#TRPBF package electrically connected?
Yes, the exposed pad on the LTC2051IDD#TRPBF is internally connected to V– (Pin 4). It must be soldered to a PCB thermal pad tied to the system ground plane to ensure proper thermal dissipation (θJA = 160°C/W) and electrical stability. Leaving it floating or connecting it to another net violates the Absolute Maximum Ratings and risks parametric shift or reliability failure.
LTC2051IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Chopper (Zero-Drift)
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 90 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 1mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC2051IDD#TRPBF FAQ
1.How can I place an order for LTC2051IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2051IDD#TRPBF 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 LTC2051IDD#TRPBF reliable?
The price and inventory of LTC2051IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2051IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2051IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2051IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2051IDD#TRPBF?
LTC2051IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2051IDD#TRPBF 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 LTC2051IDD#TRPBF?
For technical support, including LTC2051IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2051IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2051IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2051IDD#TRPBF 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 LTC2051IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2051IDD#TRPBF?
All LTC2051IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2051IDD#TRPBF, 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 LTC2051IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2051IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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