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Analog Devices Inc. LTC6362HDD#PBF
- Part No.:
- LTC6362HDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC6362HDD#PBF.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:139
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Product details
Overview
LTC6362HDD#PBF from Analog Devices (acquired Linear Technology) is a precision, low-power, fully differential op amp optimized as a SAR ADC driver. It delivers 1mA supply current, 200µV max input-referred offset voltage, 3.9nV/√Hz input noise, rail-to-rail I/O swing, and 550ns settling to 18-bit (4ppm) accuracy - enabling high-fidelity signal conditioning in battery-powered instrumentation and industrial data acquisition systems.
For engineers reviewing the LTC6362HDD#PBF datasheet, LTC6362HDD#PBF pinout, LTC6362HDD#PBF application, or LTC6362HDD#PBF equivalent, key selection criteria include guaranteed –40°C to 125°C operation, DFN-8 (3mm × 3mm) thermal performance (θJA = 39.7°C/W), shutdown current ≤70µA, and differential output balance ≤–57dB - critical for 16-/18-bit SAR ADC interfacing under thermal stress.
Technical Context
The LTC6362HDD#PBF implements a fully differential architecture with independent common-mode feedback via the VOCM pin, enabling precise output common-mode control independent of input common mode. Its internal resistor divider sets VOCM = 2.475V to 2.525V when floating at 5V supply, and it supports external VOCM overvoltage within 0.5V to 4.5V.
It operates from a single 2.8V to 5.25V supply, features ±260nA max input bias current over temperature, and maintains 34MHz –3dB bandwidth and 180MHz gain-bandwidth product while delivering –116dBc HD2 at 1kHz with 8VP-P output - confirming suitability for low-distortion, wide-dynamic-range ADC driving.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.8V to 5.25V - enables direct interface with Li-ion battery (3.0–4.2V) and 3.3V/5V logic rails without LDO overhead. |
| Supply Current (Active) | 1.06mA typ @ 5V - ensures <1.1mW active power at 5V, critical for multi-channel portable DAQ systems. |
| Input Offset Voltage | 200µV max (–40°C to 125°C) - guarantees ≤0.003% full-scale error in 18-bit (±131k LSB) systems with ±4V differential input range. |
| Input Noise Density | 3.9nV/√Hz - contributes <1.2µV RMS integrated noise (0.1Hz–100kHz), preserving >101dB SNR in precision sensor front-ends. |
| Settling Time (18-bit) | 550ns to 4ppm - meets timing budget for 1.6Msps SAR ADCs like LTC2379-18 without cycle loss. |
| Harmonic Distortion | –116dBc HD2 @ 1kHz, 8VP-P - suppresses even-order distortion critical for differential signal integrity in noisy industrial environments. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive sensors, motor control feedback, and industrial PLC analog inputs. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN with exposed V– pad (Pin 9), θJA = 39.7°C/W, θJC = 45°C/W. Exposed pad must be soldered to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –IN (Pin 1) | Inverting amplifier input | Rail-to-rail input stage accepts signals from V– to V+; differential input voltage limited to ±1.4V by internal back-to-back diodes. |
| VOCM (Pin 2) | Output common-mode reference | Sets VOUTCM = (V+OUT + V–OUT)/2; floating default = 2.5V @ 5V supply; 170kΩ input resistance allows direct tie to ADC reference. |
| V+ (Pin 3) | Positive supply rail | Accepts 2.8V–5.25V; supplies both core amplifier and internal VOCM divider; PSRR >80dB minimizes supply ripple coupling. |
| +OUT (Pin 4) | Positive differential output | Rail-to-rail swing (0.05V to 4.93V @ 5V); ±35mA drive capability supports 1kΩ load; requires series R (10–100Ω) for >10pF capacitive loads. |
| –OUT (Pin 5) | Negative differential output | Complementary to +OUT; matched dynamic performance ensures ≤–57dB output balance for harmonic cancellation. |
| V– (Pin 6 / Exposed Pad 9) | Negative supply rail | Typically 0V; supports negative supplies if (V+ – V–) remains 2.8–5.25V; exposed pad is electrically tied to V– and must be grounded. |
| SHDN (Pin 7) | Shutdown control | Logic-low (≤0.8V) disables amplifier; draws ≤70µA; pull-down must sink ≥4µA for guaranteed shutdown across temp. |
| +IN (Pin 8) | Noninverting amplifier input | Identical rail-to-rail range and protection as –IN; enables single-ended-to-differential conversion with gain set by RI/RF ratio. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply rails for maximum dynamic range - e.g., 0–5V input maps to ±4.95V differential output with 5V supply. |
| Self-biased VOCM pin | Internal 2.475V–2.525V default at 5V eliminates need for external bias network in basic configurations, reducing BOM count and layout area. |
| Low 70µA shutdown current | Extends battery life in intermittent-sampling systems (e.g., wireless sensor nodes), where active time is <1% duty cycle. |
| Differential output balance ≤–57dB | Ensures >99.8% amplitude matching between +OUT and –OUT, suppressing even-order harmonics and improving effective resolution. |
| Input common-mode rejection ≥95dB | Maintains DC accuracy despite ground bounce or supply noise - critical for isolated sensor interfaces and motor current sensing. |
Applications
| Battery-Powered Portable DAQ | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Handheld multimeter or environmental logger acquiring thermocouple, RTD, or bridge sensor outputs at 1.6Msps using LTC2379-18 ADC. IC Role / Device Role / Timing Role: Single-ended-to-differential converter and precision gain stage; provides VOCM-synchronized common-mode level for ADC reference compliance. Use Value: 1mA active current extends 2000mAh Li-ion battery life to >100 hours continuous sampling; 550ns settling enables full 1.6Msps throughput without dead time. | Use Scenario: Motor phase current sensing in servo drives, where shunt voltage must be amplified and digitized amid high dv/dt noise. IC Role / Device Role / Timing Role: High-CMRR differential driver isolating common-mode switching noise; VOCM tied to ADC's internal reference for ratiometric accuracy. Use Value: 95dB CMRR rejects >99.997% of 100V/µs common-mode transients; rail-to-rail I/O accommodates ±200mV shunt signals with 5V supply. |
| High-Resolution Medical Instrumentation | Automotive Under-Hood Sensing |
Use Scenario: ECG front-end amplifying microvolt-level biopotentials before 18-bit SAR conversion in portable monitors. IC Role / Device Role / Timing Role: Ultra-low-noise (3.9nV/√Hz), low-offset (200µV max) preamplifier converting single-ended electrode signals to balanced differential outputs. Use Value: Integrated noise <1.2µV RMS preserves diagnostic SNR; 260nA max input bias avoids electrode polarization errors in high-Z dry-electrode interfaces. | Use Scenario: Exhaust gas oxygen (EGO) sensor interface in engine control units, operating continuously at 125°C ambient. IC Role / Device Role / Timing Role: Precision buffer and level shifter driving ADC inputs; VOCM configured to match downstream ADC's 2.5V reference. Use Value: Guaranteed –40°C to 125°C operation eliminates derating; DFN package's 39.7°C/W θJA enables passive cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential ADC driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4940-1ACPZ-R7 | Higher supply current (3.6mA), wider supply range (3–10V), lower noise (2.9nV/√Hz), but only rated to 105°C. | Preferred for higher-speed (>5Msps) or wider-supply systems; unsuitable for extended-temperature automotive or industrial use. | Select ADA4940-1 if system requires <3nV/√Hz noise and can accommodate higher power; avoid for 125°C environments. |
| THS4561IRGET | Lower cost, 1.7mA supply current, 105°C max rating, higher distortion (–102dBc HD2 @ 1kHz), no VOCM pin (fixed 2.5V CM). | Targeted at cost-sensitive industrial DAQ; lacks VOCM flexibility for ratiometric ADC interfacing. | Choose THS4561 for budget-constrained designs where VOCM control and 125°C operation are non-critical. |
Compared with ADA4940-1 and THS4561, the LTC6362HDD#PBF uniquely balances ultra-low power (1mA), guaranteed 125°C operation, and flexible VOCM control - making it the only option among the three qualified for battery-powered, high-reliability, extended-temperature SAR ADC applications.
Availability
LTC6362HDD#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor signal conditioning, and automotive under-hood sensing requiring stable component supply across extended temperature ranges.
Supply support for LTC6362HDD#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 precision measurement, industrial automation, and communications markets.
The LTC6362HDD#PBF belongs to ADI's precision differential amplifier product line, engineered specifically for low-power, high-resolution SAR ADC driving in thermally demanding environments - emphasizing DC accuracy, noise performance, and robustness over temperature.
FAQ
What is the maximum allowable capacitive load for each output of the LTC6362HDD#PBF?
Each output of the LTC6362HDD#PBF must be isolated from >10pF total capacitance to ground (or >5pF differentially) using a series resistor of 10Ω to 100Ω to prevent peaking or oscillation. This requirement is specified in the Applications Information section and verified in Figure G20 of the datasheet. The LTC6362HDD#PBF's stability is highly dependent on proper output RC damping, especially in PCB layouts with long traces or ADC input capacitance.
Does the LTC6362HDD#PBF require external resistors to set gain, and what is the recommended tolerance?
Yes, the LTC6362HDD#PBF requires external feedback (RF) and gain-setting (RI) resistors to configure gain and common-mode response. For optimal common-mode rejection and harmonic cancellation, 0.1% tolerance or better metal-film resistors are recommended, as mismatch directly degrades output balance and introduces common-mode-to-differential conversion per Equation in Figure F03. The LTC6362HDD#PBF itself contains no internal gain-setting components.
Can the VOCM pin of the LTC6362HDD#PBF be left unconnected, and what voltage does it default to?
Yes, the VOCM pin of the LTC6362HDD#PBF may be left floating, and it will self-bias to 2.475V–2.525V when supplied with 5V (V+ = 5V, V– = 0V). This internal resistor divider is specified in the Electrical Characteristics table (VOCM parameter). However, for ratiometric accuracy with an ADC's reference, direct connection to that reference is preferred - the VOCM pin presents 170kΩ input resistance, compatible with most buffered ADC references.
What is the minimum supply voltage required for full-spec operation of the LTC6362HDD#PBF?
The LTC6362HDD#PBF is fully specified down to 2.8V supply voltage (V+ – V–), with all key parameters - including 200µV max offset, 550ns 18-bit settling, and 34MHz bandwidth - guaranteed over the full –40°C to 125°C range at this minimum rail. Operation below 2.8V is not characterized and may degrade PSRR, CMRR, and output swing.
How does the LTC6362HDD#PBF handle input overvoltage conditions on the +IN and –IN pins?
The LTC6362HDD#PBF protects its +IN and –IN pins with back-to-back diodes limiting differential input voltage to ±1.4V, and with steering diodes clamping each pin to V+ or V–. If either input exceeds the supply rails, input current must be externally limited to <10mA to prevent damage - a requirement explicitly stated in Absolute Maximum Ratings Note 2. This protection enables robust interfacing with multiplexed sensor arrays or fault-prone industrial inputs.
LTC6362HDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 45V/µs
- Gain Bandwidth Product:
- 180 MHz
- -3db Bandwidth:
- 34 MHz
- Current - Input Bias:
- 75 nA
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- -
- 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)
LTC6362HDD#PBF FAQ
1.How can I place an order for LTC6362HDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6362HDD#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 LTC6362HDD#PBF reliable?
The price and inventory of LTC6362HDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6362HDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC6362HDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6362HDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6362HDD#PBF?
LTC6362HDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6362HDD#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 LTC6362HDD#PBF?
For technical support, including LTC6362HDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6362HDD#PBF requirements.
6.How does Aetrix verify that LTC6362HDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6362HDD#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 LTC6362HDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC6362HDD#PBF?
All LTC6362HDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6362HDD#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 LTC6362HDD#PBF part is unused and in its original packaging.
Return procedure for LTC6362HDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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