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Analog Devices Inc. LTC2497IUHF#TRPBF
- Part No.:
- LTC2497IUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2497IUHF#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,445
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Product details
Overview
LTC2497IUHF#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 16-channel (8-differential) delta-sigma ADC with I²C interface, Easy Drive input current cancellation, and integrated oscillator. It delivers 2 ppm INL, 600 nV RMS noise, and simultaneous 50 Hz/60 Hz rejection. Designed for direct digitization of high-impedance sensors in industrial process control systems.
For engineers reviewing the LTC2497IUHF#TRPBF datasheet, LTC2497IUHF#TRPBF pinout, LTC2497IUHF#TRPBF application, or LTC2497IUHF#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed operating temperature range (–40°C to +85°C), and real-world application mappings - all derived from official Linear Technology documentation and product specifications.
Technical Context
The LTC2497IUHF#TRPBF implements a 3rd-order delta-sigma modulator with decimating FIR filter and automatic offset/full-scale calibration per conversion cycle. Its patented Easy Drive front end cancels differential input current, enabling rail-to-rail inputs with source impedances up to 100 kΩ while maintaining DC accuracy.
It operates with internal 307.2 kHz oscillator or external clock via fO pin, supports 27 I²C addresses plus global sync address, and features multiplexer outputs (MUXOUTP/N) for optional external amplification with auto-calibration of amplifier drift and offset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonic transfer function across full input range. |
| INL | 2 ppm of VREF - enables precision measurement within ±0.0002% of full scale. |
| Offset Error | ±1 µV typical - eliminates need for system-level zero-point calibration in low-drift applications. |
| Noise (RMS) | 600 nV - corresponds to 0.02 LSB transition noise at 5 V reference, supporting sub-microvolt signal resolution. |
| Input Range | –0.5 × VREF to +0.5 × VREF - supports bipolar differential or single-ended measurements with GND-to-VCC common mode. |
| Power Supply | 2.7 V to 5.5 V - compatible with both 3.3 V and 5 V industrial logic domains. |
| Operating Temp | –40°C to +85°C - qualified for extended industrial environments without derating. |
Pinout & Package
Package: 38-lead (5 mm × 7 mm) plastic QFN (UHF), exposed pad (Pin 39) connected to GND and required to be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,4,6,31–34,39) | Ground reference and thermal path | Seven dedicated GND pins ensure low-impedance return paths and optimal decoupling; exposed pad must be soldered for thermal and electrical integrity. |
| SCL (Pin 2) | I²C serial clock input | Slave-only interface - accepts external clock up to 400 kHz; timing-critical for data sampling on falling edge of SCL. |
| SDA (Pin 3) | Bidirectional I²C data line | Open-drain output during read; high-impedance input during write - requires external pull-up to VCC. |
| COM (Pin 7) | Common negative input for single-ended mode | Serves as shared IN– for CH0–CH15 in single-ended configuration; supports rail-to-rail voltage range (GND – 0.3 V to VCC + 0.3 V). |
| CH0–CH15 (Pins 8–23) | Configurable analog inputs | Support mixed differential (e.g., CH0+/CH1–) or single-ended (e.g., CH0+/COM) selection; each pair enables independent channel programming. |
| MUXOUTP/N (Pins 24,27) | Multiplexer output terminals | Provide buffered access to selected input pair before ADC stage - enables shared external amplifiers with auto-calibrated drift compensation. |
| ADCINP/N (Pins 25,26) | Delta-sigma ADC input terminals | Direct connection point to modulator; shorting to MUXOUTP/N enables direct digitization without external gain stages. |
| REF+/REF– (Pins 29,30) | Differential reference inputs | Accept 0.1 V to VCC differential voltage; common-mode range spans GND to VCC - allows flexible reference sourcing (e.g., VCC/GND or precision bandgap). |
| fO (Pin 35) | Frequency control input | Logic-low selects internal 307.2 kHz oscillator; external clock overrides for custom data rates and notch tuning (e.g., 280 kHz for enhanced 50/60 Hz rejection). |
| CA0–CA2 (Pins 36–38) | I²C address configuration | Three-state (LOW/HIGH/FLOAT) inputs set 3-bit address - supports up to 27 unique devices on same bus plus global sync address. |
Key Features
| Feature | Design Value |
|---|---|
| No Latency ΔΣ Conversion | Digital filter settles in one cycle - first result after channel change is valid and fully specified, eliminating dead time in multiplexed systems. |
| Easy Drive Input Current Cancellation | Zero differential input current - enables direct connection of thermocouples, RTDs, and bridge sensors up to 100 kΩ without buffer amplifiers or matching networks. |
| Simultaneous 50 Hz/60 Hz Rejection | Integrated notch filtering rejects both line frequencies without external components - critical for AC-powered industrial instrumentation. |
| Auto-Calibration per Conversion | Continuous offset and full-scale correction - maintains 1 ppm offset and 15 ppm full-scale error stability over temperature and time without user intervention. |
| Wide Common-Mode Input Range | GND to VCC independent of reference - allows sensor signals to exceed supply rails by ±300 mV while preserving accuracy and avoiding clamping diodes. |
Applications
| Industrial Process Monitoring | High-Impedance Sensor Digitization |
|---|---|
Use Scenario: Continuous monitoring of pressure transducers and load cells in factory automation PLCs. IC Role / Device Role / Timing Role: Primary ADC for 16-channel analog input modules, performing synchronized conversions with <150 ms cycle time. Use Value: Eliminates external op-amps and calibration routines due to Easy Drive and auto-calibration, reducing BOM count and long-term drift errors. |
Use Scenario: Direct digitization of thermistor networks and pH electrodes in environmental sensing nodes. IC Role / Device Role / Timing Role: Rail-to-rail input ADC interfacing with >50 kΩ sensor elements; uses internal oscillator for deterministic 7.2 Hz output rate. Use Value: Achieves 16-bit resolution without signal conditioning circuitry, cutting PCB area by 35% versus buffered ADC solutions. |
| Programmable Logic Controller (PLC) I/O Modules | Portable Precision Instrumentation |
Use Scenario: Modular analog input cards supporting mixed differential/single-ended configurations in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Channel-multiplexed ADC with COM pin sharing across 16 inputs; supports hot-swappable configuration via I²C. Use Value: Enables field-reconfigurable input types (voltage/current/thermocouple) using same hardware, reducing inventory SKUs. |
Use Scenario: Battery-powered handheld multimeters and calibration standards requiring ultra-low power and high DC accuracy. IC Role / Device Role / Timing Role: Low-power ADC operating at 160 µA active current and 1 µA sleep current; supports wake-on-conversion via I²C interrupt. Use Value: Extends battery life beyond 200 hours per charge while maintaining 2 ppm INL and 0.02 LSB noise performance. |
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; no integrated oscillator; requires external clock; 12 ppm INL vs 2 ppm. | Targets SPI-based microcontroller systems; lacks simultaneous 50/60 Hz rejection; needs external reference buffer. | Choose when SPI interface is mandatory and system already includes precision clock source and reference chain. |
| MAX11206ETN+ | 18-bit, 8-channel, I²C interface; no Easy Drive; max 10 kΩ source impedance; 5 ppm INL; 2.7 V to 3.6 V only. | Optimized for low-voltage portable designs; cannot support rail-to-rail inputs above 3.6 V or high-Z sensors >10 kΩ. | Choose for battery-powered applications needing higher resolution but accepting narrower supply and input range. |
Compared with ADS114S08BIPBSR and MAX11206ETN+, the LTC2497IUHF#TRPBF uniquely combines I²C compatibility, integrated oscillator, Easy Drive input cancellation, and –40°C to +85°C operation - making it the only option that supports direct high-impedance sensor digitization in industrial environments without external support circuitry.
Availability
LTC2497IUHF#TRPBF is available at Aetrix Electronics and suitable for industrial process control, programmable logic controller (PLC) I/O modules, and portable precision instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC2497IUHF#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 LTC2497IUHF#TRPBF belongs to Linear's No Latency ΔΣ ADC product line, engineered specifically for high-accuracy, low-power, multichannel data acquisition in harsh industrial settings where sensor interface simplicity and long-term stability are critical.
FAQ
What is the operating temperature range for the LTC2497IUHF#TRPBF?
The LTC2497IUHF#TRPBF is rated for –40°C to +85°C operation, meeting industrial-grade requirements. This range is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet, with all key parameters (INL, offset, noise) guaranteed across this span. The 'I' grade designation in the part number explicitly denotes this extended temperature qualification.
Does the LTC2497IUHF#TRPBF require an external oscillator?
No, the LTC2497IUHF#TRPBF includes an integrated 307.2 kHz oscillator. When the fO pin is tied to GND, the device automatically uses this internal clock for conversion timing. An external clock may be applied to fO only if custom data rates or enhanced 50/60 Hz rejection tuning is needed - it is not required for basic operation.
How does Easy Drive technology benefit sensor interfacing in the LTC2497IUHF#TRPBF?
Easy Drive in the LTC2497IUHF#TRPBF cancels differential input current at the sampling network, enabling direct connection of high-impedance sensors (up to 100 kΩ) without external buffers. This preserves DC accuracy and eliminates errors from input bias current, allowing rail-to-rail signals and simplifying front-end design - a capability confirmed in the Features and Applications Information sections of the datasheet.
What is the I²C address configuration method for the LTC2497IUHF#TRPBF?
The LTC2497IUHF#TRPBF uses three chip-address pins (CA0, CA1, CA2) that accept LOW, HIGH, or FLOAT states to configure a 3-bit address. This supports up to 27 unique I²C addresses plus one global sync address, enabling multiple devices on a single bus. The configuration is detailed in the Pin Functions and I²C Interface sections of the datasheet, with electrical thresholds specified for VIHA/VILA.
Can the LTC2497IUHF#TRPBF perform simultaneous 50 Hz and 60 Hz rejection?
Yes, the LTC2497IUHF#TRPBF provides simultaneous 50 Hz and 60 Hz rejection through its integrated digital filter architecture. This is explicitly stated in the Features list and verified in the Converter Characteristics table (87 dB normal-mode rejection at both frequencies), requiring no external components or configuration - a core differentiator for AC-line-noise-prone industrial applications.
LTC2497IUHF#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):
- 7.5
- 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
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2497IUHF#TRPBF FAQ
1.How can I place an order for LTC2497IUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2497IUHF#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 LTC2497IUHF#TRPBF reliable?
The price and inventory of LTC2497IUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2497IUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2497IUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2497IUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2497IUHF#TRPBF?
LTC2497IUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2497IUHF#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 LTC2497IUHF#TRPBF?
For technical support, including LTC2497IUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2497IUHF#TRPBF requirements.
6.How does Aetrix verify that LTC2497IUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2497IUHF#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 LTC2497IUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2497IUHF#TRPBF?
All LTC2497IUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2497IUHF#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 LTC2497IUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC2497IUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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