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Analog Devices Inc. LTC2326CMS-16#TRPBF
- Part No.:
- LTC2326CMS-16#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2326CMS-16#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,305
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Product details
Overview
LTC2326CMS-16#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs and true bipolar ±10.24V input range. It features 93.5dB SNR, ±1.5LSB INL max, onboard 2.048V low-drift reference (20ppm/°C), and SPI-compatible serial interface supporting 1.8V–5V I/O. It is used in high-speed industrial data acquisition systems requiring wide dynamic range and DC accuracy.
For engineers reviewing the LTC2326CMS-16#TRPBF datasheet, LTC2326CMS-16#TRPBF pinout, LTC2326CMS-16#TRPBF application, or LTC2326CMS-16#TRPBF equivalent, key selection criteria include guaranteed no missing codes at 16 bits, daisy-chain SPI mode, internal conversion clock, nap/sleep power management (28mW typical / 300μW sleep), and operation up to 125°C for harsh environments.
Technical Context
The LTC2326CMS-16#TRPBF employs a charge redistribution capacitor DAC architecture with resistor divider networks on IN+ and IN– to condition pseudo-differential signals into a 0–VREFBUF range for the core ADC. Its acquisition phase draws current spikes through ~50Ω switch RON and 45pF sampling capacitance, requiring low-impedance drive or buffering for optimal settling and THD.
Conversion timing is fully internal-no external clock required-with fixed 1.9–3μs conversion time and 4μs minimum cycle period. The device supports three reference configurations: internal 2.048V bandgap + 2× buffer (±10.24V range), externally overdriven REFIN (±6.25V to ±12V), or externally overdriven REFBUF (±6.25V to ±12.5V), each altering full-scale input voltage and LSB size.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes-ensures monotonicity and full code coverage for precision measurement. |
| Sampling Rate | 250ksps maximum-supports real-time capture of signals up to 7MHz input bandwidth (–3dB). |
| INL (Max) | ±1.5LSB-limits end-point linearity error to ≤±0.0023% of full scale, critical for calibration-sensitive applications. |
| SNR (Typ) | 93.5dB at fIN = 2kHz-enables >15.5 effective number of bits (ENOB) in high-fidelity signal digitization. |
| Reference Drift | 20ppm/°C max-translates to <±0.2LSB drift over 0°C to 70°C ambient, preserving DC accuracy without recalibration. |
| Power (Active) | 28mW typical at 250ksps-achieves high performance with low thermal load in space-constrained industrial modules. |
| Operating Temp | 0°C to 70°C (C-grade)-validated for commercial and light industrial environments with stable long-term reliability. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm, 0.5mm pitch), RoHS-compliant, tape-and-reel (TRPBF suffix). Thermal resistance θJA = 110°C/W; TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5V regulated supply bypass | Internal LDO output for analog core; requires 2.2µF ceramic cap to GND for noise suppression. |
| VDD (2) | Main analog power supply | 4.75V–5.25V input powering ADC core and reference; bypass with 10µF ceramic to GND. |
| GND (3,6,16) | Analog/digital ground | Three dedicated ground pins minimize ground bounce and improve PSRR in mixed-signal layout. |
| IN+ (4) | Pseudo-differential analog input (+) | Accepts true bipolar input up to ±10.24V when paired with IN–; drives resistor divider network for level shifting. |
| IN– (5) | Pseudo-differential analog input (–) | Common-mode sense node; ±500mV range w.r.t. GND; must connect to ground plane or remote sense point. |
| REFBUF (7) | Reference buffer output | Nominally 4.096V (2× VREFIN); decoupled with 47µF ceramic; can be overdriven externally (2.5V–5V) to set input range. |
| REFIN (8) | Internal reference output / external reference input | 2.048V bandgap output (bypass 100nF); accepts 1.25V–2.4V external reference to scale full-scale range. |
| CNV (9) | Convert trigger input | Rising-edge initiated conversion; powers up ADC and starts acquisition-no external timing circuitry needed. |
| CHAIN (10) | Daisy-chain mode select | High = enables chain mode (RDL/SDI becomes SDI); low = normal mode (RDL/SDI enables SDO bus). |
| BUSY (11) | Conversion status indicator | Active-high open-drain output signaling conversion in progress; synchronized to internal clock. |
| RDL/SDI (12) | Bus enable / serial data input | Mode-dependent: in normal mode, controls SDO tri-state; in chain mode, receives serial data from upstream ADC. |
| SCK (13) | Serial clock input | Accepts 1.8V–5V logic; supports up to 100MHz clock (10ns period); rising edge clocks out MSB-first 2's complement data. |
| SDO (14) | Serial data output | Tri-state CMOS output delivering 16-bit result or daisy-chained data; compatible with standard SPI masters. |
| OVDD (15) | I/O interface supply | 1.71V–5.25V digital supply setting logic thresholds; bypass with 0.1µF ceramic to GND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay or cycle latency | Delivers first valid conversion result after single CNV edge-enables deterministic real-time control loops. |
| Onboard single-shot capable reference buffer | Eliminates need for external op-amp buffer; supports fast wake-up (<200ms) and stable settling for burst-mode acquisition. |
| Programmable nap and sleep modes | Reduces average power from 28mW to 0.3mW during idle-extends battery life in portable instrumentation. |
| True bipolar ±10.24V input range | Directly interfaces with industrial ±10V sensors and PLC outputs without external level-shifting circuitry. |
| Daisy-chain SPI interface | Enables synchronous multi-channel acquisition with single SCK/SCK line-reduces PCB routing complexity and host GPIO count. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: Digitizing analog sensor outputs (e.g., 4–20mA transmitters, thermocouples) in modular PLC backplanes with tight timing constraints. IC Role / Device Role / Timing Role: High-accuracy SAR ADC providing isolated, synchronized sampling of multiple channels via daisy-chain SPI. Use Value: ±1.5LSB INL and 93.5dB SNR ensure sub-0.01% measurement fidelity across temperature, reducing calibration frequency in field-deployed units. | Use Scenario: Closed-loop feedback in chemical reactor temperature/pressure monitoring where DC stability and transient response are critical. IC Role / Device Role / Timing Role: True bipolar ADC capturing both positive and negative process deviations around setpoint with no software offset compensation. Use Value: Internal 2.048V reference with 20ppm/°C drift maintains <±0.2LSB zero-scale error from 0°C to 70°C-minimizing drift-induced control errors. |
| High Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: 32k-point FFT-based spectral analysis in benchtop oscilloscopes and signal analyzers operating at 250ksps. IC Role / Device Role / Timing Role: Low-jitter (4ps RMS aperture) SAR ADC enabling clean 93.5dB SNR and –111dB THD at 2kHz input. Use Value: 7MHz analog input bandwidth and no pipeline latency allow accurate capture of fast transients and harmonics without phase distortion. | Use Scenario: Battery-powered handheld multimeters and portable vibration analyzers requiring high resolution in minimal board area. IC Role / Device Role / Timing Role: Low-power 16-bit ADC with nap/sleep modes and compact MSOP package optimizing energy per sample and footprint. Use Value: 28mW active power and 300μW sleep current extend runtime on coin-cell or Li-ion batteries while maintaining full 16-bit performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7960BCPZ-RL7 | 18-bit, 5Msps, external reference only; no internal buffer or bipolar range scaling; requires external driver and reference. | Higher resolution and speed but demands more support circuitry and layout care; not drop-in compatible. | Select when ENOB >16.5 bits and sampling rate >1Msps are mandatory; avoid if ±10.24V direct interface or low BOM count is required. |
| ADS8860IDRCT | 16-bit, 1MSPS, unipolar 0–VREF input only; no true bipolar capability; lower SNR (91.5dB) and higher power (35mW). | Requires external level-shifting for bipolar signals; less suitable for industrial ±10V sensor interfacing. | Choose for cost-sensitive, high-speed unipolar applications where internal reference and bipolar support are unnecessary. |
Compared with AD7960BCPZ-RL7 and ADS8860IDRCT, the LTC2326CMS-16#TRPBF uniquely integrates true bipolar ±10.24V input, internal reference + buffer, and daisy-chain SPI in a single 16-pin MSOP-reducing system component count, layout complexity, and calibration overhead for industrial DAQ.
Availability
LTC2326CMS-16#TRPBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition requiring stable component supply, long-term manufacturability, and C-grade temperature validation.
Supply support for LTC2326CMS-16#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 LTC2326-16 belongs to Linear's precision SAR ADC product line, designed specifically for industrial and instrumentation applications demanding high DC accuracy, wide dynamic range, and robust operation in noisy, thermally variable environments.
FAQ
What is the absolute maximum input voltage range for LTC2326CMS-16#TRPBF?
The LTC2326CMS-16#TRPBF specifies absolute maximum analog input voltages of –16.5V to +16.5V on IN+, and –0.5V to +0.5V on IN–. However, the functional true bipolar input range is ±10.24V (differential), achieved when using the internal 2.048V reference and 2× buffer. Exceeding recommended operating ranges risks latch-up or permanent damage per Absolute Maximum Ratings.
Does LTC2326CMS-16#TRPBF require an external clock for conversion timing?
No, the LTC2326CMS-16#TRPBF uses an internal oscillator to generate its conversion clock-eliminating the need for an external timing source. A single rising edge on the CNV pin initiates acquisition and conversion autonomously. The typical conversion time is 1.9–3μs, with no pipeline delay or cycle latency, simplifying system timing design.
Can LTC2326CMS-16#TRPBF operate with a 3.3V I/O interface while powered from 5V VDD?
Yes, the LTC2326CMS-16#TRPBF supports independent I/O voltage scaling: VDD is fixed at 4.75–5.25V for analog circuitry, while OVDD may be set to 1.71–5.25V-including 3.3V-to match host microcontroller or FPGA logic levels. All digital pins (CNV, BUSY, SCK, SDO, RDL/SDI, CHAIN) comply with 3.3V thresholds when OVDD = 3.3V.
How does the nap mode reduce power consumption in LTC2326CMS-16#TRPBF?
The LTC2326CMS-16#TRPBF automatically enters nap mode between conversions, reducing supply current from 11.5mA (active) to 0.1mA (nap) at 250ksps-cutting dynamic power by ~90%. This adaptive behavior scales linearly with sampling rate, making it highly efficient for variable-rate acquisition without firmware intervention.
Is LTC2326CMS-16#TRPBF pin-compatible with other members of the LTC2326 family?
Yes, all LTC2326-x variants-including LTC2326IMS-16#TRPBF (I-grade) and LTC2326HMS-16#TRPBF (H-grade)-share identical 16-lead MSOP pinout, electrical interface, and register mapping. Only temperature range and screening differ; the LTC2326CMS-16#TRPBF (C-grade, 0°C to 70°C) can be substituted in designs where extended temperature operation is not required.
LTC2326CMS-16#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2326CMS-16#TRPBF FAQ
1.How can I place an order for LTC2326CMS-16#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2326CMS-16#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 LTC2326CMS-16#TRPBF reliable?
The price and inventory of LTC2326CMS-16#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2326CMS-16#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2326CMS-16#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2326CMS-16#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2326CMS-16#TRPBF?
LTC2326CMS-16#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2326CMS-16#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 LTC2326CMS-16#TRPBF?
For technical support, including LTC2326CMS-16#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2326CMS-16#TRPBF requirements.
6.How does Aetrix verify that LTC2326CMS-16#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2326CMS-16#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 LTC2326CMS-16#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2326CMS-16#TRPBF?
All LTC2326CMS-16#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2326CMS-16#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 LTC2326CMS-16#TRPBF part is unused and in its original packaging.
Return procedure for LTC2326CMS-16#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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