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Analog Devices Inc. LTC2326CMS-16#PBF
- Part No.:
- LTC2326CMS-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2326CMS-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:166
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Product details
Overview
LTC2326CMS-16#PBF 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 operates from a single 5V supply, integrates a 2.048V low-drift reference and reference buffer, achieves ±1.5LSB INL max and 93.5dB SNR, and targets high-voltage industrial data acquisition systems requiring wide dynamic range and precision.
For engineers reviewing the LTC2326CMS-16#PBF datasheet, LTC2326CMS-16#PBF pinout, LTC2326CMS-16#PBF application, or LTC2326CMS-16#PBF equivalent, key selection considerations include its no-cycle-latency SPI interface, daisy-chain capability, internal conversion clock, 16-lead MSOP package, and guaranteed operation up to 125°C in H-grade variants.
Technical Context
The LTC2326CMS-16#PBF implements a charge redistribution SAR architecture with a 16-bit CDAC and differential comparator. Its pseudo-differential input stage uses resistor divider networks to level-shift ±10.24V signals to the 0–4.096V core ADC range, achieving 7MHz –3dB input linear bandwidth and 4psRMS aperture jitter.
Conversion is initiated by a rising edge on CNV; an internal oscillator eliminates external timing dependencies. The device supports three reference configurations: internal 2.048V reference + 2× buffer (±10.24V range), externally overdriven REFIN (e.g., 1.25V → ±6.25V), or externally overdriven REFBUF (e.g., 5V → ±12.5V), all with programmable OVDD logic levels from 1.71V to 5.25V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization |
| Sampling Rate | 250ksps - enables real-time capture of signals up to ~125kHz Nyquist bandwidth |
| INL (Max) | ±1.5LSB - ensures monotonicity and accurate transfer function across full scale |
| SNR (Typ) | 93.5dB at fIN = 2kHz - supports >15.5 effective bits (ENOB) in narrowband applications |
| Input Range | ±10.24V true bipolar - accommodates legacy industrial sensor outputs without external level-shifting |
| Power Dissipation | 28mW at 250ksps - scales with sampling rate via automatic nap mode between conversions |
| Reference | 2.048V internal bandgap (20ppm/°C max drift) - provides stable scaling without external components |
| Interface | SPI-compatible serial I/O with daisy-chain mode - simplifies multi-channel system design with minimal GPIO usage |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm, 0.65mm pitch), RoHS-compliant, rated for 0°C to 70°C (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5V regulated bypass | On-chip LDO output; requires 2.2µF ceramic capacitor to GND for stability |
| VDD (2) | Main analog supply | 4.75V–5.25V input powering ADC core and reference; bypass with 10µF ceramic |
| GND (3,6,16) | Analog/digital ground | Three dedicated ground pins minimize noise coupling and improve PSRR |
| IN+ (4) | Pseudo-differential analog input | Accepts ±10.24V relative to IN–; drives resistor divider network for level shifting |
| IN– (5) | Common-mode sense reference | ±500mV range w.r.t. GND; ties to remote ground plane or sensor return |
| REFBUF (7) | Buffered reference output | Nominally 4.096V (2× REFIN); decoupled with 47µF ceramic; can be overdriven externally |
| REFIN (8) | Internal reference output / external reference input | 2.048V bandgap output; accepts 1.25V–2.4V external reference via 15kΩ series resistor |
| CNV (9) | Convert trigger | Rising-edge–initiated conversion; powers up ADC and starts acquisition phase |
| CHAIN (10) | Daisy-chain mode select | High = RDL/SDI becomes serial data input for cascaded ADC configurations |
| BUSY (11) | Conversion status indicator | Active-high pulse indicates ongoing conversion; used for timing synchronization |
| RDL/SDI (12) | Serial bus enable / data input | In normal mode: controls SDO tri-state; in chain mode: receives upstream ADC data |
| SCK (13) | Serial clock input | Drives SPI data transfer; supports up to 100MHz clock (10ns period) for rising-edge capture |
| SDO (14) | Serial data output | 2's complement 16-bit result shifted MSB-first on SCK rising edges |
| OVDD (15) | I/O interface supply | 1.71V–5.25V logic supply; sets VIH/VIL thresholds and drives digital I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency | Delivers first valid conversion result immediately after CNV rising edge-no pipeline delay affects real-time control loops |
| True bipolar ±10.24V input | Directly interfaces with ±10V industrial sensors and transducers without external op-amp level-shifting circuitry |
| Single-shot capable reference buffer | Enables precise one-time calibration sequences by stabilizing REFBUF during critical measurement windows |
| Automatic nap mode | Reduces power between conversions proportionally to sample rate-28mW at 250ksps drops to 0.3mW in sleep mode |
| Daisy-chain SPI mode | Allows synchronous readout of multiple LTC2326 devices using one SCK and SDO line-reduces host MCU pin count and PCB routing complexity |
| Guaranteed operation to 125°C | Validated performance across full temperature range supports deployment in harsh environments like motor drives and downhole tools |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: Digitizing 4–20mA current loop outputs and ±10V analog sensor signals in modular PLC I/O modules. IC Role / Device Role / Timing Role: Primary high-precision ADC capturing field signals at 250ksps with deterministic latency for closed-loop response within 4µs. Use Value: Eliminates external signal conditioning for bipolar industrial standards, reducing BOM cost and board area while maintaining ±1.5LSB INL accuracy. | Use Scenario: High-speed monitoring of pressure, temperature, and flow transmitters in distributed control systems (DCS). IC Role / Device Role / Timing Role: Front-end ADC in redundant sensor acquisition nodes, synchronized via BUSY/CNV for time-aligned multi-sensor sampling. Use Value: 93.5dB SNR enables detection of sub-millivolt process anomalies; daisy-chain mode simplifies expansion of channel count without adding SPI peripherals. |
| High Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: 16-channel simultaneous sampling in benchtop oscilloscopes and spectrum analyzers with FFT-based analysis. IC Role / Device Role / Timing Role: Core SAR ADC providing 250ksps throughput per channel with no missing codes for lossless waveform reconstruction. Use Value: Internal 2.048V reference and 4psRMS jitter ensure consistent amplitude accuracy and phase coherence across channels in multi-ADC systems. | Use Scenario: Battery-powered handheld multimeters and portable power quality analyzers requiring precision and low power. IC Role / Device Role / Timing Role: Main ADC operating in nap mode between measurements, activated only on user trigger or scheduled interval. Use Value: 28mW active power and 300μW sleep mode extend battery life while preserving 16-bit resolution and ±10.24V input compatibility. |
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, ±5V input, external reference required, no integrated buffer | Higher resolution/speed but demands external reference design and higher power (43mW) | Select when ENOB >16.5 bits and sampling >1Msps is required; not drop-in due to different pinout and reference architecture |
| LTC2325IMS-16#PBF | Same family, 16-bit, 1Msps, identical ±10.24V range and pinout, but higher power (42mW at 1Msps) | Drop-in speed upgrade path with same layout and firmware interface | Choose for higher throughput where thermal budget allows; shares identical reference, timing, and daisy-chain behavior |
Compared with AD7960BCPZ-RL7, LTC2326CMS-16#PBF offers lower system complexity via integrated reference and buffer, while LTC2325IMS-16#PBF provides a direct speed upgrade with identical footprint and software compatibility-enabling scalable channel density without redesign.
Availability
LTC2326CMS-16#PBF 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 lifecycle support, and guaranteed C-grade temperature performance (0°C to 70°C).
Supply support for LTC2326CMS-16#PBF 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2326CMS-16#PBF belongs to ADI's high-speed precision SAR ADC product line, engineered for industrial automation and test equipment demanding true bipolar input ranges, low latency, and robust operation in electrically noisy environments.
FAQ
What is the maximum sampling rate of the LTC2326CMS-16#PBF?
The LTC2326CMS-16#PBF supports a maximum sampling rate of 250ksps with no cycle latency. At this rate, conversion time is 3µs, acquisition time is 3.46µs, and minimum time between conversions is 4µs. This fixed timing is governed by an internal oscillator, eliminating dependency on external clock sources for basic operation.
Does the LTC2326CMS-16#PBF require an external reference?
No, the LTC2326CMS-16#PBF does not require an external reference. It integrates a factory-trimmed 2.048V bandgap reference with ≤20ppm/°C drift and a single-shot capable 2× reference buffer delivering 4.096V at REFBUF. This enables a standard ±10.24V input range with no external components. External references may be used optionally via REFIN or REFBUF pins for enhanced accuracy.
How does the daisy-chain mode work on the LTC2326CMS-16#PBF?
In daisy-chain mode (CHAIN pin high), the LTC2326CMS-16#PBF accepts serial data on RDL/SDI and shifts its own 16-bit result out on SDO in sequence. Multiple devices are connected SDO→RDL/SDI, sharing one SCK and BUSY line. A single CNV pulse triggers simultaneous sampling, and results are read back in cascaded fashion-reducing host interface requirements for multi-channel systems.
What is the power consumption of the LTC2326CMS-16#PBF in active and sleep modes?
The LTC2326CMS-16#PBF consumes 28mW typical at 250ksps (VDD = 5V, OVDD = 2.5V). In nap mode between conversions, power drops dynamically with sample rate. In sleep mode (CNV held low), total supply current falls to 300μA, reducing power to 0.3mW-ideal for intermittent measurement applications where ultra-low standby power is critical.
Is the LTC2326CMS-16#PBF pin-compatible with other members of the LTC232x family?
Yes, the LTC2326CMS-16#PBF shares identical pinout and package (16-lead MSOP) with LTC2325IMS-16#PBF (1Msps) and LTC2327IMS-16#PBF (500ksps). All support the same reference configurations, SPI interface, and daisy-chain functionality. Firmware and layout are directly reusable across these variants, enabling performance-scaling without hardware redesign.
LTC2326CMS-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC2326CMS-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2326CMS-16#PBF 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#PBF reliable?
The price and inventory of LTC2326CMS-16#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC2326CMS-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2326CMS-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2326CMS-16#PBF?
LTC2326CMS-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2326CMS-16#PBF 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#PBF?
For technical support, including LTC2326CMS-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2326CMS-16#PBF requirements.
6.How does Aetrix verify that LTC2326CMS-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2326CMS-16#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC2326CMS-16#PBF?
All LTC2326CMS-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2326CMS-16#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC2326CMS-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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