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Analog Devices Inc. LTC2435-1IGN#TRPBF
- Part No.:
- LTC2435-1IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2435-1IGN#TRPBF.pdf
- Description:
- IC ADC 20BIT SIGMA-DELTA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
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Product details
Overview
LTC2435-1IGN#TRPBF from Analog Devices (formerly Linear Technology) is a 20-bit micropower delta-sigma ADC with differential input and reference, single-cycle settling, 87dB simultaneous 50Hz/60Hz normal-mode rejection, 3ppm INL, and 0.8ppm RMS noise-designed for high-precision industrial sensor digitization in weight scales and strain gage transducers.
For engineers reviewing the LTC2435-1IGN#TRPBF datasheet, LTC2435-1IGN#TRPBF pinout, LTC2435-1IGN#TRPBF application, or LTC2435-1IGN#TRPBF equivalent, key selection factors include its dual-line-frequency rejection mode, GND-to-VCC common-mode input/reference flexibility, internal oscillator operation, 16-pin SSOP package, and 13.75Hz output rate with no external timing components required.
Technical Context
The LTC2435-1IGN#TRPBF implements a decimating FIR filter with auto-calibration architecture that achieves simultaneous 49Hz–61.2Hz notch rejection without external clocking-enabled by FO pin grounded to select the dual-frequency mode. Its modulator operates at ~139.8kHz, yielding a 13.75Hz data rate and 24-bit serial output via SPI-compatible 3-wire interface.
It supports fully independent common-mode voltage settings: VINCM and VREFCM each adjustable from GND to VCC, enabling ratiometric remote sensing and direct bridge transducer interfacing. DC common-mode rejection exceeds 120dB, and power supply rejection reaches 120dB at 50/60Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit no missing codes-guarantees monotonicity and full-scale accuracy across temperature. |
| INL | 3ppm of VREF-enables 6½-digit DVM-level linearity without system calibration. |
| RMS Noise | 0.8ppm of VREF (4µV RMS @ 5V ref)-supports sub-1µV resolution in low-drift applications. |
| Output Rate | 13.75Hz-optimized for simultaneous 50Hz/60Hz line rejection with single conversion settling. |
| Supply Current | 200µA active, 4µA auto-sleep-enables battery-powered instrumentation with >1-year runtime. |
| Common-Mode Rejection | 120dB DC, 87dB over 49–61.2Hz-rejects shared-noise interference in noisy industrial environments. |
| Reference Range | 0.1V to VCC-allows flexible ratiometric sensing with any external reference or direct VCC referencing. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 0.150" wide, SO-8 footprint compatible, –40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7, 8, 9, 10, 15, 16) | Ground reference | Seven dedicated ground pins internally tied-require low-impedance connection to PCB ground plane for optimal noise immunity and decoupling. |
| VCC (Pin 2) | Positive supply | 2.7V–5.5V single supply; requires 10µF tantalum + 0.1µF ceramic bypass close to pin. |
| REF+ / REF– (Pins 3, 4) | Differential reference inputs | Accept 0.1V–VCC differential range; VREFCM independently set from GND to VCC for remote sensing. |
| IN+ / IN– (Pins 5, 6) | Differential analog inputs | Support –0.5VREF to +0.5VREF differential range; VINCM independently set from GND to VCC. |
| FO (Pin 14) | Frequency control | Grounded to enable simultaneous 50Hz/60Hz rejection mode; VCC selects 50Hz-only (LTC2435), external clock enables user-defined notch. |
| CS (Pin 11) | Chip select | Active-low; initiates data output and wakes ADC from sleep; HIGH maintains 4µA auto-sleep state. |
| SDO (Pin 12) | Serial data output | Three-state output; delivers 24-bit conversion result MSB-first on falling SCK edge; Hi-Z when CS = HIGH. |
| SCK (Pin 13) | Serial clock | Bidirectional: outputs internal clock during data transfer (if pulled high at power-up), or accepts external clock. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 50Hz/60Hz rejection | FO = GND configures digital filter nulls across 49–61.2Hz-eliminates need for site-specific line frequency selection. |
| No-latency conversion | Single-cycle settling ensures each 24-bit output corresponds exactly to the most recent analog sample-critical for multiplexed sensor arrays. |
| Full-scale auto-calibration per cycle | Continuous internal gain calibration maintains <10ppm full-scale drift over time, temperature, and supply variation-no external recalibration needed. |
| GND-to-VCC common-mode flexibility | Independent VINCM and VREFCM ranges allow direct interfacing to unbuffered bridge sensors, thermocouples, and remote references without level-shifting circuitry. |
| Micropower sleep mode | 4µA quiescent current with CS = HIGH-enables ultra-low-power wake-on-event architectures in portable test equipment. |
Applications
| Weight Scales | Strain Gage Transducers |
|---|---|
Use Scenario: High-resolution load cell measurement in commercial and industrial weighing systems with AC mains noise. IC Role / Device Role / Timing Role: Direct digitizer of mV-level bridge outputs with simultaneous 50Hz/60Hz rejection and ratiometric reference tracking. Use Value: Eliminates external notch filters and calibration routines-reduces BOM count and improves long-term zero stability beyond 0.5ppm/°C. |
Use Scenario: Precision force and pressure sensing in hydraulic monitoring and structural health systems. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC capturing microvolt-level differential signals from 4-wire Wheatstone bridges. Use Value: 3ppm INL and 120dB DC CMRR enable ±0.001% full-scale accuracy without trimming-reducing factory calibration time by >40%. |
| Direct Temperature Measurement | 6-Digit DVMs |
Use Scenario: Cold-junction compensation and RTD readout in multi-channel temperature controllers. IC Role / Device Role / Timing Role: Ratiometric digitizer accepting PT100/PT1000 excitation and reference on same VCC rail. Use Value: 0.1V–VCC reference range and independent VREFCM support direct 2-/3-/4-wire RTD configurations-no external op-amps or references required. |
Use Scenario: Benchtop digital multimeters requiring stable 6½-digit resolution under varying line conditions. IC Role / Device Role / Timing Role: Core ADC engine delivering calibrated 20-bit results with <1µV RMS noise and 13.75Hz update rate. Use Value: Internal oscillator and auto-calibration ensure consistent 6.5-digit performance across global markets-no regional firmware variants needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit, 4kSPS, integrated PGA and sensor bias, but requires external clock for 50/60Hz rejection; no simultaneous dual-line rejection. | Preferred for multi-channel, programmable-gain sensor hubs-not optimized for fixed-rate, ultra-low-noise single-channel digitization. | Select when system needs on-chip PGA, burnout current, or multiple analog inputs; avoid if simultaneous 50/60Hz rejection and minimal external components are mandatory. |
| LTC2440IGN#TRPBF | 24-bit, 15Hz output, 110dB 50/60Hz rejection (single-frequency only), higher noise (1.5ppm), larger 20-pin SSOP package. | Better for legacy designs requiring higher resolution at expense of dual-frequency flexibility and board space. | Choose only if 24-bit resolution outweighs size, power, and dual-line-frequency requirements-LTC2435-1IGN#TRPBF offers superior integration in same footprint. |
Compared with ADS124S08IPW and LTC2440IGN#TRPBF, the LTC2435-1IGN#TRPBF uniquely delivers simultaneous 50Hz/60Hz rejection in a compact 16-pin SSOP with lowest noise and smallest active current-making it optimal for cost-sensitive, globally deployed precision sensor nodes where layout area and power are constrained.
Availability
LTC2435-1IGN#TRPBF is available at Aetrix Electronics and suitable for weight scales, strain gage transducers, and 6-digit DVMs requiring stable component supply, long-term calibration integrity, and global line-frequency compatibility.
Supply support for LTC2435-1IGN#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 LTC2435-1IGN#TRPBF belongs to Linear's No Latency ΔΣ™ precision ADC family-engineered for direct sensor digitization in industrial instrumentation, test equipment, and metrology systems demanding uncompromised linearity and noise performance.
FAQ
What is the primary function of the FO pin on the LTC2435-1IGN#TRPBF?
The FO (Frequency Control) pin on the LTC2435-1IGN#TRPBF determines the digital filter's notch frequency configuration. When FO is grounded, the LTC2435-1IGN#TRPBF enters simultaneous 50Hz/60Hz rejection mode across 49–61.2Hz-enabling global deployment without hardware or firmware changes. This differs from the standard LTC2435, which uses FO = VCC for 50Hz-only or FO = GND for 60Hz-only rejection.
Does the LTC2435-1IGN#TRPBF require external passive components for line-frequency rejection?
No, the LTC2435-1IGN#TRPBF does not require external passive components for line-frequency rejection. Its integrated oscillator and fixed-decimation FIR filter provide guaranteed ≥87dB normal-mode rejection from 49Hz to 61.2Hz when FO = GND-eliminating crystals, capacitors, or RC networks needed by competing ADCs to achieve comparable AC noise immunity.
How does the LTC2435-1IGN#TRPBF achieve single-cycle settling time?
The LTC2435-1IGN#TRPBF achieves true single-cycle settling through its No Latency ΔΣ™ architecture: each conversion completes in one full filter period (≈73ms), and the resulting 24-bit output corresponds precisely to that input sample-with no pipeline delay, redundant samples, or post-processing latency. This enables deterministic timing for multiplexed multi-sensor systems without software synchronization overhead.
What is the maximum allowable reference voltage range for the LTC2435-1IGN#TRPBF?
The LTC2435-1IGN#TRPBF accepts a differential reference voltage (VREF = REF+ − REF−) from 0.1V up to VCC, with REF+ and REF− each independently biased anywhere between GND and VCC. This allows direct ratiometric operation using VCC as reference, or precise remote sensing with externally buffered references-without violating absolute input limits or degrading INL performance.
Can the LTC2435-1IGN#TRPBF operate from a 3.3V supply while maintaining full 20-bit performance?
Yes, the LTC2435-1IGN#TRPBF is fully specified from 2.7V to 5.5V, including all key parameters-3ppm INL, 0.8ppm RMS noise, 120dB DC CMRR, and 87dB 50/60Hz rejection-at 3.3V. Electrical Characteristics tables confirm typical and max values hold across the entire supply range, making it suitable for mixed-voltage industrial systems and battery-powered instruments.
LTC2435-1IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 20
- Sampling Rate (Per Second):
- 13.75
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2435-1IGN#TRPBF FAQ
1.How can I place an order for LTC2435-1IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2435-1IGN#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 LTC2435-1IGN#TRPBF reliable?
The price and inventory of LTC2435-1IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2435-1IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2435-1IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2435-1IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2435-1IGN#TRPBF?
LTC2435-1IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2435-1IGN#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 LTC2435-1IGN#TRPBF?
For technical support, including LTC2435-1IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2435-1IGN#TRPBF requirements.
6.How does Aetrix verify that LTC2435-1IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2435-1IGN#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 LTC2435-1IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2435-1IGN#TRPBF?
All LTC2435-1IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2435-1IGN#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 LTC2435-1IGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC2435-1IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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