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Analog Devices Inc. LTC2495IUHF#TRPBF
- Part No.:
- LTC2495IUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2495IUHF#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
LTC2495IUHF#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 16-channel (8-differential) delta-sigma ADC with integrated PGA, Easy Drive input architecture, I²C interface, and on-chip temperature sensor. It delivers 2 ppm INL, 600 nV RMS noise, and programmable gain up to 256 - enabling direct digitization of rail-to-rail, high-impedance sensors in industrial process monitoring systems.
For engineers reviewing the LTC2495IUHF#TRPBF datasheet, LTC2495IUHF#TRPBF pinout, LTC2495IUHF#TRPBF application, or LTC2495IUHF#TRPBF equivalent, key selection considerations include its no-latency conversion, simultaneous 50/60 Hz rejection, GND-to-VCC common-mode input range, and 38-pin QFN package with exposed thermal pad.
Technical Context
The LTC2495IUHF#TRPBF employs a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration per conversion cycle - eliminating offset and full-scale drift without user intervention. Its Easy Drive architecture cancels differential input current, enabling accurate measurements from sources up to multi-megaohm impedance.
It supports two speed modes: normal (7.5 Hz output rate, 80 µA) and 2× speed (15 Hz, 160–275 µA), with configurable 50 Hz, 60 Hz, or simultaneous 50/60 Hz notch rejection. The internal oscillator runs at 307.2 kHz (±2%); external clocking via fO pin allows precise data rate tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full input range. |
| INL | 2 ppm of VREF - ensures linearity error ≤ ±0.0002% FS, critical for precision instrumentation calibration. |
| Offset Error | ±0.5 µV (typ) - enables sub-microvolt DC measurement stability without external trimming. |
| RMS Noise | 0.6 µV (typ, 1x mode) - supports 19.5+ ENOB at low data rates for high-fidelity sensor digitization. |
| Input Range | GND to VCC common mode - accepts rail-to-rail signals independent of reference voltage selection. |
| Gain Range | Programmable 1× to 256× in 8 steps - matches signal amplitude to ADC full scale without external amplifiers. |
| Temp Sensor | ±2°C absolute accuracy, 0.5°C resolution - provides on-chip thermal compensation without external components. |
Pinout & Package
38-lead (5 mm × 7 mm) plastic QFN package with exposed thermal pad (Pin 39 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,4,6,31–34) | Ground reference | Seven dedicated ground pins minimize ground bounce and improve PSRR; all must connect to low-impedance ground plane. |
| SCL / SDA (Pins 2,3) | I²C serial interface | Standard 2-wire bus; SDA is open-drain requiring external pull-up; supports up to 400 kHz clock rate. |
| CH0–CH15 (Pins 8–23) | Analog multiplexer inputs | Configurable as 16 single-ended or 8 differential channels; support ±0.5·VREF/Gain input range. |
| COM (Pin 7) | Common negative input | Shared IN− for all single-ended configurations; extends flexibility in sensor grounding schemes. |
| MUXOUTP/N (Pins 24,27) | Multiplexer outputs | Enable sharing of external op-amps across all channels; reduce component count in multi-sensor systems. |
| ADCINP/N (Pins 25,26) | ADC analog inputs | Dedicated delta-sigma modulator inputs; accept buffered or direct MUX outputs with minimal loading. |
| REF+/REF− (Pins 29,30) | Differential reference | Set full-scale range independently of supply; VREF ≥ 0.1 V required; supports ratiometric or absolute referencing. |
| fO (Pin 35) | Frequency control | Selects internal oscillator (GND) or external clock source (0.01–1 MHz); determines output data rate and filter null placement. |
| CA0–CA2 (Pins 36–38) | I²C address bits | Three-state (LOW/HIGH/FLOAT) configuration yields 27 unique addresses plus global sync address. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Digital filter settles in one cycle - first result after channel change is fully valid and meets spec, eliminating wait states in multiplexed systems. |
| Easy Drive input technology | Automatic cancellation of differential input current - enables direct connection to >10 MΩ source impedances without accuracy loss. |
| Simultaneous 50/60 Hz rejection | Single-conversion rejection of both power-line frequencies - simplifies EMI mitigation in global industrial deployments. |
| Integrated temperature sensor | On-die PTAT element with 93.5 µV/°C coefficient - provides real-time thermal compensation for offset/gain drift correction. |
| Auto-calibration per conversion | Continuous offset and full-scale correction - removes need for system-level calibration routines or factory trim storage. |
Applications
| Industrial Process Monitoring | Multi-Sensor Data Acquisition |
|---|---|
Use Scenario: Continuous logging of pressure, flow, and level transducers in chemical plant control cabinets. IC Role / Device Role / Timing Role: Primary ADC digitizing 12+ analog sensor outputs with simultaneous 50/60 Hz noise rejection. Use Value: Eliminates external anti-aliasing filters and reduces BOM cost by integrating PGA, temp sensor, and I²C interface in one QFN. | Use Scenario: Modular sensor node aggregating thermocouples, RTDs, and strain gauges in predictive maintenance edge devices. IC Role / Device Role / Timing Role: High-accuracy front-end converter with programmable gain per channel and no-latency switching. Use Value: Enables true multi-sensor synchronization via global I²C address; supports <1 µV offset stability over temperature. |
| Portable Instrumentation | Temperature-Compensated Weighing Systems |
Use Scenario: Battery-powered handheld multimeter measuring mV-level thermocouple outputs and µA-loop signals. IC Role / Device Role / Timing Role: Low-power 16-bit ADC with 80 µA sleep current and 2.7 V operation for extended runtime. Use Value: Delivers 19.5+ ENOB at 7.5 Hz while consuming <0.8 mW - extends battery life without sacrificing resolution. | Use Scenario: Platform scale using load cells with thermal drift compensation in warehouse logistics terminals. IC Role / Device Role / Timing Role: Simultaneous acquisition of load cell differential output and on-chip temperature for real-time gain/offset correction. Use Value: On-die 0.5°C-resolution temperature sensor enables closed-loop compensation without external ICs or NTC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS114S08BIPBSR | 16-bit, 12-channel, SPI interface; integrated PGA and burn-out current sources; no on-chip temp sensor. | Requires SPI host and external temperature sensing for thermal compensation; better suited for high-speed scanning. | Choose when SPI interface and burn-out diagnostics are prioritized over I²C simplicity and integrated thermal sensing. |
| MAX11206ETN+ | 18-bit, 8-channel, I²C interface; 0.5 µV offset; no programmable gain; no integrated temp sensor. | Lacks PGA and on-die temperature sensor - requires external amplification and separate thermal monitoring. | Choose when higher resolution (18-bit) is mandatory and system already includes gain stages and temperature sensing. |
Compared with ADS114S08BIPBSR and MAX11206ETN+, the LTC2495IUHF#TRPBF uniquely integrates I²C, PGA, Easy Drive, simultaneous 50/60 Hz rejection, and calibrated temperature sensing in a single 38-pin QFN - reducing system complexity for medium-speed, multi-sensor industrial nodes.
Availability
LTC2495IUHF#TRPBF is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and multi-sensor data acquisition systems requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for LTC2495IUHF#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2495IUHF#TRPBF belongs to Linear's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in harsh industrial environments where noise immunity, thermal stability, and ease of integration are critical.
FAQ
What is the operating temperature range of the LTC2495IUHF#TRPBF?
The LTC2495IUHF#TRPBF is rated for –40°C to +85°C (industrial grade), as confirmed by its "I" suffix and Absolute Maximum Ratings table. This range supports deployment in factory automation, outdoor metering, and transportation equipment where ambient conditions exceed commercial limits. The device maintains full 16-bit performance and specified INL/offset across this range.
Does the LTC2495IUHF#TRPBF require external components for basic operation?
Yes - the LTC2495IUHF#TRPBF requires a 10 µF tantalum + 0.1 µF ceramic capacitor on VCC (Pin 28), pull-up resistors on SDA/SCL, and proper grounding of all seven GND pins plus the exposed thermal pad (Pin 39). No external reference or amplifier is needed for basic operation due to its integrated PGA, internal oscillator, and flexible reference architecture.
How does the Easy Drive technology in the LTC2495IUHF#TRPBF improve measurement accuracy?
Easy Drive eliminates dynamic input current errors by automatically canceling differential input current through a patented sampling scheme. This allows the LTC2495IUHF#TRPBF to directly digitize signals from high-impedance sources (e.g., pH electrodes, thermistors, unbuffered bridges) without gain/linearity degradation - preserving DC accuracy even with source impedances exceeding 10 MΩ.
Can the LTC2495IUHF#TRPBF perform simultaneous 50 Hz and 60 Hz rejection in a single conversion?
Yes - the LTC2495IUHF#TRPBF supports a dedicated simultaneous 50/60 Hz rejection mode. When enabled, its digital filter places nulls at both frequencies in one conversion cycle (tCONV_1 = 144.1–149.9 ms), making it ideal for globally deployed equipment operating in regions with either power standard - without requiring firmware switching or dual-mode calibration.
What is the function of the fO pin on the LTC2495IUHF#TRPBF?
The fO pin (Pin 35) controls the conversion clock source: tied to GND, it selects the internal 307.2 kHz oscillator; driven externally, it accepts a 10–1000 kHz clock to precisely set output data rate and adjust digital filter nulls. This enables deterministic timing for synchronized multi-device sampling or custom EMI rejection profiles beyond standard 50/60 Hz.
LTC2495IUHF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 15
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- PGA, Selectable Address, Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2495IUHF#TRPBF FAQ
1.How can I place an order for LTC2495IUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2495IUHF#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 LTC2495IUHF#TRPBF reliable?
The price and inventory of LTC2495IUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2495IUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2495IUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2495IUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2495IUHF#TRPBF?
LTC2495IUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2495IUHF#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 LTC2495IUHF#TRPBF?
For technical support, including LTC2495IUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2495IUHF#TRPBF requirements.
6.How does Aetrix verify that LTC2495IUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2495IUHF#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 LTC2495IUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2495IUHF#TRPBF?
All LTC2495IUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2495IUHF#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 LTC2495IUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC2495IUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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