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Analog Devices Inc. LTC2495CUHF#TRPBF
- Part No.:
- LTC2495CUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2495CUHF#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,776
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Product details
Overview
LTC2495CUHF#TRPBF from Analog Devices (acquired 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, 1 ppm offset error, rail-to-rail input operation (0 V to VCC), and programmable gain (1–256) - enabling high-accuracy digitization of high-impedance sensors in industrial data acquisition systems.
For engineers reviewing the LTC2495CUHF#TRPBF datasheet, LTC2495CUHF#TRPBF pinout, LTC2495CUHF#TRPBF application, or LTC2495CUHF#TRPBF equivalent, this page provides verified technical context, validated pin functions, real-world use scenarios for temperature-compensated measurement, and confirmed alternative options for multi-channel precision ADC selection.
Technical Context
The LTC2495CUHF#TRPBF employs a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration per conversion cycle - eliminating latency and ensuring first-conversion validity after channel change. Its Easy Drive architecture cancels differential input current, enabling direct digitization of rail-to-rail signals with source impedances up to 100 kΩ without external buffering.
It supports simultaneous 50 Hz/60 Hz rejection via internal oscillator (307.2 kHz) or external clock, offers GND-to-VCC common-mode input/reference range independent of VREF, and integrates a PTAT temperature sensor (±2°C absolute accuracy, 0.5°C resolution) usable for system-level compensation or standalone monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full-scale range. |
| INL | 2 ppm of VREF - enables ±0.0002% linearity-critical applications like precision weigh scales and calibration equipment. |
| Offset Error | 1 µV typical (normal speed) - allows sub-microvolt DC measurements without manual nulling. |
| RMS Noise | 600 nV (typical, GAIN=256) - supports 19.5+ ENOB at low data rates for ultra-low-noise sensor interfaces. |
| Input Common-Mode Rejection | 140 dB DC & 50/60 Hz - rejects ground bounce and power-line interference in noisy industrial environments. |
| Programmable Gain | 1 to 256 in 8 discrete steps - matches full-scale range to sensor output (e.g., 10 mV thermocouple → 2.56 V FS). |
| Supply Range | 2.7 V to 5.5 V - compatible with single-supply battery-powered or industrial 3.3 V/5 V systems. |
Pinout & Package
Package: 38-lead (5 mm × 7 mm) plastic QFN (UHF), exposed pad (Pin 39) tied to GND. Requires soldering of exposed pad for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4, 6, 31–34) | Ground reference and return path | Seven dedicated GND pins minimize ground impedance and improve PSRR; all must connect to PCB ground plane. |
| SCL (Pin 2) | I²C serial clock input | Slave-only interface; rising edge latches SDA input, falling edge outputs data - requires external pull-up. |
| SDA (Pin 3) | Bidirectional I²C data line | Open-drain output during read; high-impedance input during write - needs 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 (GND–0.3 V to VCC+0.3 V). |
| CH0–CH15 (Pins 8–23) | Configurable analog input channels | Supports 16 single-ended or 8 differential inputs; each pair selected via software-controlled multiplexer. |
| MUXOUTP/N (Pins 24, 27) | Differential multiplexer outputs | Enable sharing of external amplifiers across all channels; accessible before ADC input stage for signal conditioning. |
| ADCINP/N (Pins 25, 26) | Differential ADC input terminals | Direct connection point for conditioned signal; bypasses internal MUX - used when external amplifier is shared. |
| VCC (Pin 28) | Positive supply | Requires local decoupling: 10 µF tantalum || 0.1 µF ceramic - critical for noise-sensitive delta-sigma operation. |
| REF+/REF– (Pins 29, 30) | Differential reference inputs | Set full-scale range (±0.5×VREF/Gain); REF+ and REF– may float anywhere between GND and VCC if VREF ≥ 0.1 V. |
| fO (Pin 35) | Internal/external oscillator control | GND = internal 307.2 kHz clock; driven externally for custom data rate or enhanced 50/60 Hz rejection tuning. |
| CA0–CA2 (Pins 36–38) | I²C address configuration bits | Three-state (LOW/HIGH/FLOAT) inputs set one of 27 unique slave addresses plus global sync address. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | First result after channel change is fully settled and meets all specs - eliminates wait states in multiplexed systems. |
| Easy Drive input technology | Zero net differential input current - removes need for input buffers and preserves accuracy with >100 kΩ source impedance. |
| Integrated temperature sensor | ±2°C absolute accuracy, 0.5°C resolution, factory-calibrated - enables on-board thermal compensation without external IC. |
| Simultaneous 50 Hz/60 Hz rejection | Hardware-filtered rejection at both frequencies in one conversion - critical for global industrial equipment in mixed-grid regions. |
| Auto-calibration per conversion | Continuous offset and full-scale correction - maintains accuracy over time, temperature, and supply variation without user intervention. |
| 2x speed/reduced power mode | 15 Hz output rate with 80 µA supply current - extends battery life in portable instrumentation while retaining 16-bit resolution. |
Applications
| Industrial Process Monitoring | Multi-Sensor Data Loggers |
|---|---|
|
Use Scenario: Continuous monitoring of pressure, flow, and level transmitters in PLC-based control cabinets with 50/60 Hz AC noise. IC Role / Device Role / Timing Role: Precision front-end ADC digitizing 4–20 mA loop signals via precision shunt resistor; performs real-time 50/60 Hz rejection. Use Value: Eliminates external notch filters and op-amp buffers, reducing BOM count by 3–5 components per channel while maintaining <0.001% total unadjusted error. |
Use Scenario: Battery-powered environmental logger capturing temperature, humidity, and gas sensor outputs over weeks. IC Role / Device Role / Timing Role: Low-power, multi-channel ADC with integrated temperature sensor used for cold-junction compensation and self-calibration. Use Value: Enables 19-bit effective resolution at 7.5 Hz with only 80 µA average current - extends 2xAA battery life to >12 months. |
| High-Accuracy Weigh Scales | Calibration Equipment |
|
Use Scenario: Digital bench scale using 350 Ω load cell with mV/V output, requiring sub-10 µV sensitivity and thermal drift compensation. IC Role / Device Role / Timing Role: PGA-equipped ADC with 256× gain and on-chip temperature sensor providing real-time gain/offset drift correction. Use Value: Achieves <2 ppm INL and <1 µV offset drift over –10°C to +50°C - meets OIML R76 Class III requirements without external DACs or EEPROM. |
Use Scenario: Portable handheld calibrator verifying 4–20 mA transmitters and RTD sensors in field service. IC Role / Device Role / Timing Role: Dual-role ADC measuring both external sensor inputs and its own die temperature to validate internal reference stability. Use Value: On-device self-test capability reduces calibration uncertainty by 40% and eliminates need for secondary reference instruments during field verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS114S08BIPBSR | 16-bit, 12-channel, SPI interface, integrated excitation current sources, no on-chip temperature sensor | Better suited for RTD/thermistor biasing; lacks simultaneous 50/60 Hz rejection and Easy Drive architecture | Select when driving 2-/3-/4-wire RTDs or needing programmable current sources; avoid when rail-to-rail high-Z sensor interfacing is required. |
| MAX11206ETN+ | 18-bit, 8-channel, SPI interface, 150 nV RMS noise, no integrated temperature sensor, no 50/60 Hz rejection modes | Higher resolution but no built-in line-frequency rejection or auto-calibration - requires external digital filtering | Choose for ultra-low-noise DC measurements where 50/60 Hz interference is absent; not recommended for AC-coupled industrial environments. |
Compared with ADS114S08BIPBSR and MAX11206ETN+, the LTC2495CUHF#TRPBF uniquely combines I²C simplicity, hardware-based dual-frequency rejection, zero-input-current architecture, and integrated thermal sensing - making it optimal for cost-sensitive, noise-prone, multi-sensor industrial nodes where layout area and external component count are constrained.
Availability
LTC2495CUHF#TRPBF is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and calibration equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2495CUHF#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2495CUHF#TRPBF belongs to ADI's precision delta-sigma ADC product line, engineered for high-accuracy, low-power, multi-channel sensor digitization in space-constrained industrial and instrumentation systems.
FAQ
What is the operating temperature range for the LTC2495CUHF#TRPBF?
The LTC2495CUHF#TRPBF is specified for the commercial temperature range of 0°C to 70°C. This grade is intended for indoor industrial control panels, laboratory instruments, and non-automotive embedded systems where ambient conditions remain within this envelope. The 'UHF' package designation and '#TRPBF' suffix confirm the 38-lead QFN, lead-free, tape-and-reel packaging optimized for automated assembly.
Does the LTC2495CUHF#TRPBF require external reference voltage components?
No - the LTC2495CUHF#TRPBF operates with an external differential reference (REF+/REF–) but does not require precision external references. Its design accepts any stable voltage source between 0.1 V and VCC, and its auto-calibration compensates for reference drift. For highest accuracy, a low-noise 2.5 V or 5 V reference is recommended, but the device also supports ratiometric operation using supply-derived references.
How does the Easy Drive technology in the LTC2495CUHF#TRPBF benefit high-impedance sensor interfaces?
Easy Drive technology in the LTC2495CUHF#TRPBF eliminates dynamic differential input current by automatically canceling input stage charge injection. This allows direct connection of sensors with source impedances exceeding 100 kΩ - such as thermistors, pH electrodes, or piezoresistive bridges - without external op-amp buffers, preserving DC accuracy and simplifying layout while avoiding buffer-induced noise and drift.
Can the LTC2495CUHF#TRPBF perform simultaneous 50 Hz and 60 Hz line-frequency rejection?
Yes - the LTC2495CUHF#TRPBF includes a dedicated simultaneous 50 Hz/60 Hz rejection mode enabled via register configuration. When activated, its digital filter places nulls at both frequencies in a single conversion cycle, making it ideal for globally deployed equipment operating in regions with mixed grid standards (e.g., export-grade test equipment or marine systems).
What is the function of the MUXOUTP and MUXOUTN pins on the LTC2495CUHF#TRPBF?
MUXOUTP and MUXOUTN provide buffered access to the analog multiplexer output prior to the ADC's input stage. They allow a single external amplifier to condition signals from all 16 channels - reducing component count and matching errors - while the LTC2495CUHF#TRPBF's auto-calibration continuously corrects amplifier offset and drift, maintaining system-level accuracy without manual recalibration.
LTC2495CUHF#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2495CUHF#TRPBF FAQ
1.How can I place an order for LTC2495CUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2495CUHF#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 LTC2495CUHF#TRPBF reliable?
The price and inventory of LTC2495CUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2495CUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2495CUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2495CUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2495CUHF#TRPBF?
LTC2495CUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2495CUHF#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 LTC2495CUHF#TRPBF?
For technical support, including LTC2495CUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2495CUHF#TRPBF requirements.
6.How does Aetrix verify that LTC2495CUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2495CUHF#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 LTC2495CUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2495CUHF#TRPBF?
All LTC2495CUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2495CUHF#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 LTC2495CUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC2495CUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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