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Analog Devices Inc. LTC2435-1CGN#TRPBF
- Part No.:
- LTC2435-1CGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2435-1CGN#TRPBF.pdf
- Description:
- IC ADC 20BIT SIGMA-DELTA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,765
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Product details
Overview
LTC2435-1CGN#TRPBF from Analog Devices (formerly Linear Technology) is a 20-bit micropower delta-sigma ADC with differential input and reference, 13.75Hz output rate, simultaneous 50Hz/60Hz line-frequency rejection (>87dB), 3ppm INL, and 0.8ppm RMS noise. It operates from 2.7V to 5.5V, supports GND-to-VCC common-mode ranges on both input and reference, and targets precision sensor digitization in industrial instrumentation and weigh scales.
For engineers reviewing the LTC2435-1CGN#TRPBF datasheet, LTC2435-1CGN#TRPBF pinout, LTC2435-1CGN#TRPBF application, or LTC2435-1CGN#TRPBF equivalent, this page delivers verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative options for high-accuracy, low-power DC measurement systems requiring stable line-frequency immunity without external clock components.
Technical Context
The LTC2435-1CGN#TRPBF implements a no-latency delta-sigma architecture with integrated decimating FIR filter and auto-calibrating modulator. Its digital filter provides simultaneous 50Hz/60Hz ±2% notch rejection when FO = GND, achieving ≥87dB normal-mode rejection across 49Hz–61.2Hz.
It uses an internal oscillator (no external components required) and supports flexible 3-wire SPI/MICROWIRE interface with SCK as bidirectional clock. Input and reference common-mode voltages are independently configurable from GND to VCC, enabling true ratiometric remote sensing and wide-range transducer interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit with no missing codes - guarantees monotonicity and full-scale fidelity for precision DC measurements. |
| INL | 3ppm of VREF - enables sub-1μV linearity error at 5V reference, critical for 6½-digit DVMs and strain-gage bridges. |
| RMS Noise | 0.8ppm of VREF - translates to ~4μV RMS at 5V ref, supporting 19.5+ effective bits at 13.75Hz output rate. |
| Line Rejection | >87dB over 49Hz–61.2Hz - ensures robust operation in global AC-powered industrial environments without external filtering. |
| Supply Current | 200μA active, 4μA sleep - allows battery-powered portable instrumentation with multi-year runtime. |
| Input Range | ±0.5VREF differential, GND-to-VCC common mode - accommodates direct connection to unbuffered bridge sensors and thermocouples. |
| Reference Range | 0.1V to VCC differential - supports flexible ratiometric configurations using internal LDOs or external references. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 0.150" width, SO-8 footprint compatible, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 7, 8, 9, 10, 15, 16) | Ground reference | Seven dedicated ground pins internally tied for low-impedance return paths, mandatory for noise-sensitive 20-bit performance. |
| VCC (Pin 2) | Positive supply | 2.7V–5.5V single supply; requires local 10μF tantalum + 0.1μF ceramic decoupling for stable conversion accuracy. |
| REF+ / REF– (Pins 3, 4) | Differential reference inputs | Accept 0.1V–VCC differential voltage; common-mode range independent of input, enabling remote sensing topologies. |
| IN+ / IN– (Pins 5, 6) | Differential analog inputs | Support ±0.5VREF full-scale range with GND–VCC common-mode tolerance - eliminates need for input level-shifting amplifiers. |
| FO (Pin 14) | Frequency control | Configures notch behavior: GND enables simultaneous 50Hz/60Hz rejection (LTC2435-1); VCC or external clock selects alternate modes. |
| CS (Pin 11) | Chip select | Active-low enable: LOW wakes ADC and initiates data output; HIGH forces auto-sleep (4μA) and holds last result in static register. |
| SDO (Pin 12) | Serial data output | Three-state output delivering 24-bit conversion result; high-Z when CS = HIGH, synchronized to SCK falling edge. |
| SCK (Pin 13) | Serial clock | Bidirectional: output in internal-clock mode (17.5kHz), input in external-clock mode - mode auto-detected at power-up or CS fall. |
Key Features
| Feature | Design Value |
|---|---|
| No latency delta-sigma conversion | Single-cycle settling enables true multiplexed sensor scanning without inter-channel crosstalk or filter delay artifacts. |
| Simultaneous 50Hz/60Hz rejection | Hardware-configured (FO = GND) notch eliminates need for software-based digital filtering or region-specific design variants. |
| Full-scale auto-calibration per cycle | Compensates for gain drift due to temperature, supply, and aging - maintains <10ppm gain error stability over time. |
| GND-to-VCC common-mode flexibility | Allows direct interface to grounded or floating sensors (e.g., load cells, RTDs) without external biasing or rail-splitting networks. |
| 20-bit resolution in SSOP-16 | SO-8 footprint compatibility enables drop-in upgrade from legacy 16-bit converters without PCB redesign. |
Applications
| Weight Scales | Direct Temperature Measurement |
|---|---|
Use Scenario: High-precision platform scales measuring 0.1g increments in factory floor environments with 50/60Hz AC lighting and motor noise. IC Role / Device Role / Timing Role: Direct digitizer for mV-level bridge outputs; performs ratiometric conversion referenced to excitation voltage. Use Value: 87dB simultaneous line-frequency rejection ensures stable readings without shielding or synchronous sampling firmware. | Use Scenario: Industrial RTD or thermistor circuits in HVAC controllers where ambient temperature must be resolved to ±0.01°C. IC Role / Device Role / Timing Role: Precision analog front-end with programmable reference and wide common-mode input range. Use Value: GND-to-VCC input common-mode support enables direct connection to 2-/3-wire RTD configurations without op-amp buffers. |
| Strain Gage Transducers | 6-Digit DVMs |
Use Scenario: Structural health monitoring systems using bonded foil strain gages exposed to variable AC mains interference. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC with integrated oscillator and auto-calibration for long-term stability. Use Value: 3ppm INL and 0.8ppm RMS noise deliver sub-1μV resolution needed for microstrain detection in civil engineering applications. | Use Scenario: Benchtop digital voltmeters requiring 6½-digit accuracy (1ppm) and guaranteed linearity across full scale. IC Role / Device Role / Timing Role: Core measurement engine with differential reference and no-latency output for real-time display updates. Use Value: Full-scale calibration every cycle eliminates gain drift errors that degrade DVM accuracy during extended warm-up periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit resolution, 4kSPS max, integrated PGA and reference; requires external clock for line rejection. | Higher resolution but lacks hardware-configurable simultaneous 50/60Hz notch; needs firmware-based digital filtering for AC immunity. | Select for systems needing >20-bit resolution and programmable gain, accepting added software complexity for line rejection. |
| LTC2440IGN#TRPBF | 24-bit, 7.5Hz output, 110dB 50/60Hz rejection (single-frequency), higher noise (1.5ppm RMS). | Superior line rejection at single frequency but cannot reject both 50Hz and 60Hz simultaneously; slower update rate. | Select when operating in fixed-region deployments (e.g., EU-only or US-only) where single-frequency notch suffices and lower noise is secondary. |
Compared with ADS124S08IPW and LTC2440IGN#TRPBF, the LTC2435-1CGN#TRPBF uniquely delivers hardware-enforced dual-line-frequency rejection in a 20-bit, ultra-low-power package-making it optimal for globally deployed, battery-operated instrumentation where firmware simplicity and AC noise immunity are prioritized over maximum bit depth.
Availability
LTC2435-1CGN#TRPBF is available at Aetrix Electronics and suitable for weight scales, industrial process control, and portable instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC2435-1CGN#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, including high-performance delta-sigma ADCs for demanding measurement applications.
The LTC2435-1CGN#TRPBF belongs to Linear's No Latency ΔΣ™ ADC family, designed specifically for high-accuracy, low-power DC measurement systems where line-frequency interference, thermal drift, and layout simplicity are critical constraints.
FAQ
What is the key functional difference between LTC2435-1CGN#TRPBF and LTC2435CGN#TRPBF?
The LTC2435-1CGN#TRPBF provides simultaneous 50Hz and 60Hz line-frequency rejection (>87dB) when FO = GND, whereas the LTC2435CGN#TRPBF offers >110dB rejection at either 50Hz or 60Hz individually-selected by tying FO to VCC (50Hz) or GND (60Hz). This makes the LTC2435-1CGN#TRPBF ideal for globally deployed equipment without region-specific configuration.
Does LTC2435-1CGN#TRPBF require external components for its oscillator function?
No. The LTC2435-1CGN#TRPBF integrates a precision internal oscillator requiring no external crystals, capacitors, or resistors. This eliminates BOM cost and layout area while ensuring consistent 13.75Hz output rate and guaranteed 49Hz–61.2Hz line rejection when FO = GND.
What is the maximum allowable reference voltage range for LTC2435-1CGN#TRPBF?
The LTC2435-1CGN#TRPBF accepts a differential reference voltage (VREF = REF+ – REF–) from 0.1V to VCC. For example, with VCC = 5V, VREF may be set anywhere from 0.1V to 5.0V - enabling flexible ratiometric designs using internal LDOs, DACs, or precision external references.
How does the LTC2435-1CGN#TRPBF achieve no-latency operation in multiplexed systems?
The LTC2435-1CGN#TRPBF performs full-scale auto-calibration every conversion cycle and outputs data corresponding exactly to the most recent completed conversion - with zero filter settling delay. This one-to-one correspondence eliminates inter-channel timing skew and enables reliable scanning of multiple sensors without post-processing compensation.
What is the significance of seven GND pins on the LTC2435-1CGN#TRPBF SSOP package?
The seven dedicated GND pins (Pins 1, 7–10, 15, 16) are internally connected to minimize ground impedance and separate analog/digital return currents. This layout reduces noise coupling and preserves 0.8ppm RMS noise performance - all seven must be soldered to a solid ground plane for specified 20-bit accuracy.
LTC2435-1CGN#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2435-1CGN#TRPBF FAQ
1.How can I place an order for LTC2435-1CGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2435-1CGN#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 LTC2435-1CGN#TRPBF reliable?
The price and inventory of LTC2435-1CGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2435-1CGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2435-1CGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2435-1CGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2435-1CGN#TRPBF?
LTC2435-1CGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2435-1CGN#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 LTC2435-1CGN#TRPBF?
For technical support, including LTC2435-1CGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2435-1CGN#TRPBF requirements.
6.How does Aetrix verify that LTC2435-1CGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2435-1CGN#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 LTC2435-1CGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2435-1CGN#TRPBF?
All LTC2435-1CGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2435-1CGN#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 LTC2435-1CGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC2435-1CGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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