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Analog Devices Inc. LTC2440CGN#TRPBF
- Part No.:
- LTC2440CGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2440CGN#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,613
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Product details
Overview
LTC2440CGN#TRPBF from Analog Devices (formerly Linear Technology) is a 24-bit no-latency delta-sigma ADC with differential inputs, programmable speed/resolution (6.9 Hz to 3.5 kHz), 5 ppm INL, 5 µV offset, and integrated oscillator. It operates from 4.5 V to 5.5 V and delivers 200 nVRMS noise at 6.9 Hz with simultaneous 50/60 Hz rejection - ideal for high-precision weight scales and auto-ranging DVMs.
For engineers reviewing the LTC2440CGN#TRPBF datasheet, LTC2440CGN#TRPBF pinout, LTC2440CGN#TRPBF application, or LTC2440CGN#TRPBF equivalent, key selection criteria include selectable output rate/noise trade-off, autosleep current down to 25 µA, differential reference support (0.1 V to VCC), and pin compatibility with LTC2410 in narrow 16-lead SSOP.
Technical Context
The LTC2440CGN#TRPBF uses a proprietary delta-sigma architecture enabling real-time speed/resolution reconfiguration without latency or settling delay. Each conversion cycle includes automatic offset and full-scale calibration, ensuring stability across temperature, supply voltage, and time.
It supports both internal and external clocking via EXT and fO pins, offers 32-bit serial output (3 status + 24 data + 5 sub-LSB bits), and features true differential analog input (–0.5·VREF to +0.5·VREF) with GND-to-VCC common-mode range on IN+/IN– and REF+/REF–.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and unambiguous digital representation of analog input. |
| INL | ±5 ppm of VREF - enables 0.0005% linearity accuracy critical for metrology-grade measurements. |
| Offset Error | ≤5 µV (–40°C to 85°C) - eliminates need for system-level offset trimming in precision sensor interfaces. |
| Noise (RMS) | 200 nV at 6.9 Hz (with 50/60 Hz rejection); 2 µV at 880 Hz - allows flexible trade-off between resolution and throughput. |
| Supply Range | 4.5 V to 5.5 V - compatible with standard 5 V logic and industrial power rails. |
| Output Rate | Programmable from 6.9 Hz to 3.5 kHz - supports applications from slow thermal sensing to fast multiplexed data acquisition. |
| Power (Sleep) | 25 µA at 6.9 Hz output rate - enables ultra-low-power operation in battery-powered instrumentation. |
Pinout & Package
Narrow 16-lead SSOP (GN package), RoHS-compliant, lead-free finish. Four ground pins (1, 8, 9, 16) ensure low-impedance return paths and optimal decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1, 8, 9, 16) | Ground reference | All four pins must be connected to PCB ground plane; internal connection ensures stable reference and minimizes ground bounce. |
| VCC (2) | Positive supply | Requires local 10 µF tantalum + 0.1 µF ceramic bypass to GND (Pin 1) for noise-sensitive delta-sigma operation. |
| REF+ / REF– (3, 4) | Differential reference inputs | Accept 0.1 V to VCC differential voltage; common-mode range spans GND to VCC, enabling flexible reference sourcing. |
| IN+ / IN– (5, 6) | Differential analog inputs | Bipolar input range = ±0.5·VREF; absolute voltage range = GND – 0.3 V to VCC + 0.3 V - supports wide common-mode signal conditioning. |
| SDI (7) | Speed/resolution select | Logic LOW = 880 Hz / 2 µVRMS; HIGH = 6.9 Hz / 200 nVRMS + 50/60 Hz rejection; also accepts serial programming for 10-speed modes. |
| CS (11) | Chip select | Active LOW enables SDO and wakes ADC from sleep; rising edge during data transfer aborts output and starts new conversion. |
| SDO (12) | Serial data output | 3-state output; delivers 32-bit frame (status + 24-bit result + 5 sub-LSBs); high-Z when CS = HIGH. |
| SCK (13) | Serial clock | Bidirectional: output in internal mode (EXT = HIGH), input in external mode (EXT = LOW); controls data timing on falling edge. |
| fO (14) | Frequency control | Connect to GND or VCC to enable internal oscillator; eliminates need for external crystal or clock source. |
| BUSY (15) | Conversion status | Active LOW indicates conversion complete and data ready; remains LOW during sleep and data output states. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Each output corresponds precisely to its associated conversion - enables seamless multiplexing and real-time speed switching without settling errors. |
| Per-cycle auto-calibration | Continuous offset and full-scale correction every conversion - ensures long-term stability without user intervention or external calibration routines. |
| Autosleep power management | Reduces average current to 25 µA at 6.9 Hz output rate - extends battery life in portable test equipment and field instruments. |
| Differential reference flexibility | Supports 0.1 V to VCC differential reference with GND-to-VCC common-mode range - simplifies design with single-supply op-amps or ratiometric sensors. |
| Pin compatibility with LTC2410 | Direct drop-in replacement in existing layouts using same 16-lead SSOP footprint - reduces redesign effort and qualification time. |
Applications
| Weight Scales | Auto-Ranging DVMs |
|---|---|
|
Use Scenario: High-resolution load cell measurement in commercial and industrial weighing systems requiring <10 ppm linearity and drift immunity. IC Role / Device Role / Timing Role: Primary 24-bit ADC capturing differential bridge outputs; provides calibrated, no-latency digital values synchronized to mechanical sampling intervals. Use Value: 5 ppm INL and <5 µV offset eliminate factory calibration steps; 200 nVRMS noise at 6.9 Hz enables 200,000-count resolution without external filtering. |
Use Scenario: 6½-digit benchtop digital multimeter with automatic range switching and AC/DC voltage/current measurement. IC Role / Device Role / Timing Role: Core metrology ADC handling multiple input ranges; selects optimal speed/resolution per range via SDI or serial interface. Use Value: Programmable 6.9 Hz to 3.5 kHz output rate allows matching conversion bandwidth to range settling time; 50/60 Hz rejection ensures clean readings in noisy lab environments. |
| Direct Temperature Measurement | High-Speed Data Acquisition |
|
Use Scenario: Precision thermistor or RTD readout in environmental monitoring and medical devices where self-heating and drift must be minimized. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC interfacing directly to 2-/3-/4-wire sensor configurations; uses differential reference to reject common-mode thermal gradients. Use Value: 200 nVRMS noise and 0.0005% INL translate to <0.01 °C resolution with platinum RTDs; autosleep reduces thermal loading on sensitive sensors. |
Use Scenario: Multiplexed sensor array acquisition in industrial PLCs or test fixtures requiring >1 kSPS aggregate throughput with 24-bit fidelity. IC Role / Device Role / Timing Role: High-speed delta-sigma ADC operating at 3.5 kHz with 21 µVRMS noise; leverages no-latency architecture for deterministic channel switching. Use Value: 3.5 kHz output rate enables 1 ms per channel for 10-channel systems; pin-compatible upgrade path from LTC2410 maintains legacy hardware investment. |
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 |
|---|---|---|---|
| ADS1256IDBT | 24-bit, 30 kSPS max, SPI interface, external reference required, no built-in 50/60 Hz rejection | Higher speed but requires external notch filter or firmware averaging for power-line rejection | Choose for higher throughput where external filtering is acceptable; not pin-compatible. |
| LTC2410CGN#TRPBF | 24-bit, fixed 7.5 Hz output, 1 µVRMS noise, no SDI programmability, identical pinout and package | Lower noise floor at fixed rate; lacks speed/resolution flexibility and 50/60 Hz rejection | Choose for cost-sensitive, fixed-rate applications where programmability is unnecessary. |
Compared with ADS1256IDBT and LTC2410CGN#TRPBF, the LTC2440CGN#TRPBF uniquely combines programmable speed/resolution, integrated 50/60 Hz rejection, and pin compatibility with LTC2410 - offering design flexibility without layout change or external components.
Availability
LTC2440CGN#TRPBF is available at Aetrix Electronics and suitable for weight scales, auto-ranging DVMs, direct temperature measurement, and high-speed data acquisition requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC2440CGN#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 continues to develop and support its precision analog portfolio, including high-performance delta-sigma ADCs.
The LTC2440CGN#TRPBF belongs to Linear's No Latency ΔΣ ADC family, designed specifically for metrology-grade applications demanding zero-latency conversion, per-cycle calibration, and flexible noise/speed optimization without sacrificing accuracy.
FAQ
What is the operating temperature range for the LTC2440CGN#TRPBF?
The LTC2440CGN#TRPBF is specified for the commercial temperature range of 0°C to 70°C. Its electrical characteristics - including ±5 ppm INL, ≤5 µV offset, and 200 nVRMS noise at 6.9 Hz - are guaranteed across this full range. The 'C' grade suffix in the part number explicitly denotes this temperature rating.
Does the LTC2440CGN#TRPBF require an external crystal or clock source?
No, the LTC2440CGN#TRPBF includes an integrated oscillator. When the fO pin is tied to GND or VCC, the device uses its internal clock - eliminating external timing components. External clocks (0.1–12 MHz) are optional and enabled by driving fO with an external oscillator signal.
How does the LTC2440CGN#TRPBF achieve 50/60 Hz rejection without external filters?
The LTC2440CGN#TRPBF achieves simultaneous 50/60 Hz rejection through its proprietary delta-sigma modulator architecture and digital filter design optimized for the 6.9 Hz output rate. This rejection is intrinsic to the selected speed/resolution mode and requires no external hardware or firmware configuration.
Can the LTC2440CGN#TRPBF interface directly with a microcontroller SPI port?
Yes, the LTC2440CGN#TRPBF supports standard 3-wire or 4-wire SPI-compatible serial communication. In external SCK mode (EXT = LOW), it functions as a standard SPI slave with CS, SCK, SDI, and SDO lines - requiring only level-compatible logic and proper timing adherence per the datasheet's tLESCK/tHESCK specs.
What is the significance of the 'TRPBF' suffix in LTC2440CGN#TRPBF?
The '#TRPBF' suffix indicates tape-and-reel packaging (TR), lead-free finish (P), and RoHS compliance (F). The 'GN' denotes the narrow 16-lead SSOP package. This full ordering code ensures traceable, production-ready delivery of the commercial-grade LTC2440CGN#TRPBF variant.
LTC2440CGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 3.5k
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2440CGN#TRPBF FAQ
1.How can I place an order for LTC2440CGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2440CGN#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 LTC2440CGN#TRPBF reliable?
The price and inventory of LTC2440CGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2440CGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2440CGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2440CGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2440CGN#TRPBF?
LTC2440CGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2440CGN#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 LTC2440CGN#TRPBF?
For technical support, including LTC2440CGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2440CGN#TRPBF requirements.
6.How does Aetrix verify that LTC2440CGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2440CGN#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 LTC2440CGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2440CGN#TRPBF?
All LTC2440CGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2440CGN#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 LTC2440CGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC2440CGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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