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Analog Devices Inc. LTC2326HMS-16#PBF
- Part No.:
- LTC2326HMS-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2326HMS-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:597
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Product details
Overview
LTC2326HMS-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 integrates a low-drift 2.048V internal reference, onboard reference buffer, and SPI-compatible serial interface supporting 1.8V–5V I/O logic. Designed for high-voltage industrial data acquisition, it delivers 93.5dB SNR, ±1.5LSB INL max, and guaranteed no missing codes at full resolution.
For engineers reviewing the LTC2326HMS-16#PBF datasheet, LTC2326HMS-16#PBF pinout, LTC2326HMS-16#PBF application, or LTC2326HMS-16#PBF equivalent, key selection criteria include its H-grade (–40°C to +125°C) operation, daisy-chain SPI mode, nap/sleep power management (28mW typical / 300μW sleep), and ±10.24V true bipolar input compatibility with high-impedance sensor interfaces.
Technical Context
The LTC2326HMS-16#PBF employs a charge-redistribution SAR architecture with internal oscillator timing, eliminating external clock dependencies. Its pseudo-differential input stage uses resistor-divider networks to level-shift ±10.24V signals to the ADC core's 0–4.096V range while maintaining common-mode rejection.
Conversion is initiated by a rising edge on CNV; BUSY asserts during acquisition and conversion (tCONV ≤ 3µs). The SPI interface supports both normal mode (RDL/SDI as bus enable) and chain mode (RDL/SDI as SDI), enabling multi-ADC daisy-chaining without additional control lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees full-scale quantization with 65,536 discrete output levels and no missing codes. |
| Sampling Rate | 250ksps - enables real-time capture of signals up to 125kHz Nyquist bandwidth with zero pipeline latency. |
| Input Range | ±10.24V true bipolar - supports direct connection to industrial sensors and transducers without external level-shifting. |
| SNR | 93.5dB (typ) at fIN = 2kHz - ensures high-fidelity digitization of low-distortion analog waveforms in precision instrumentation. |
| INL | ±1.5LSB (max) - limits integral nonlinearity error to <0.023% of full scale, critical for calibration-sensitive applications. |
| Reference | 2.048V internal bandgap (20ppm/°C max drift) with 2× buffered output - provides stable 4.096V reference for ±10.24V input scaling without external components. |
| Power Dissipation | 28mW (typ) at 250ksps - scales with sampling rate via automatic nap mode, reducing thermal load in compact enclosures. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm, 0.65mm pitch), RoHS-compliant, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5V LDO bypass | Internal regulator output requiring 2.2µF ceramic decoupling; powers internal analog circuitry independently of VDD noise. |
| VDD (2) | 5V analog supply | Main analog power rail (4.75–5.25V); must be decoupled with 10µF ceramic capacitor to ensure stable conversion accuracy. |
| GND (3,6,16) | Analog/digital ground | Three dedicated ground pins minimize ground bounce and improve PSRR; require low-inductance PCB connection to common ground plane. |
| IN+ (4) | Pseudo-differential analog input (+) | Accepts true bipolar voltage from –10.24V to +10.24V relative to IN–; input impedance ~2kΩ due to internal resistor divider. |
| IN– (5) | Pseudo-differential analog input (–) | Sense reference point with ±500mV range; must connect to system ground or remote sense point to define common-mode baseline. |
| REFBUF (7) | Buffered reference output | Nominally 4.096V (2× REFIN); decoupled with 47µF ceramic capacitor; can be overdriven externally (2.5–5V) to scale input range. |
| REFIN (8) | Internal reference output / external reference input | 2.048V bandgap output (bypass with 100nF); accepts external reference 1.25–2.4V to adjust REFBUF and input range. |
| CNV (9) | Convert trigger | Rising-edge–sensitive control input; initiates acquisition and conversion sequence; logic levels referenced to OVDD. |
| CHAIN (10) | Daisy-chain mode select | High = chain mode (RDL/SDI becomes SDI); Low = normal mode (RDL/SDI enables SDO); sets serial interface topology. |
| BUSY (11) | Conversion status indicator | Active-high open-drain output signaling ongoing conversion; used for timing synchronization or interrupt generation. |
| RDL/SDI (12) | Serial bus enable / daisy-chain data input | Mode-dependent function: enables SDO in normal mode; receives serial data from upstream ADC in chain mode. |
| SCK (13) | Serial clock input | Master-controlled clock (up to 100MHz) synchronizing data transfer; rising edge clocks out MSB-first 2's complement data on SDO. |
| SDO (14) | Serial data output | Tri-state output delivering 16-bit conversion result or daisy-chain data; compatible with 1.8V–5V host logic levels. |
| OVDD (15) | I/O interface supply | Digital I/O voltage rail (1.71–5.25V); sets logic thresholds for CNV, CHAIN, BUSY, RDL/SDI, SCK, and SDO pins. |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar ±10.24V input | Enables direct interfacing with industrial ±10V sensors and PLC outputs without external op-amp level-shifting circuitry. |
| No cycle latency / zero pipeline delay | Delivers first valid conversion result immediately after CNV edge-critical for closed-loop control and real-time triggering. |
| Daisy-chain SPI mode | Allows cascading multiple LTC2326HMS-16#PBF devices on a single 3-wire bus (SCK, SDO, RDL/SDI), reducing GPIO count and PCB routing complexity. |
| Auto nap mode | Reduces dynamic power proportionally to sampling rate; eliminates need for manual power state management in variable-rate systems. |
| H-grade temperature rating (–40°C to +125°C) | Guarantees full electrical performance across extended industrial and automotive under-hood environments without derating. |
| Onboard 2.048V reference + 2× buffer | Eliminates external reference IC and associated passive components, reducing BOM cost and board area while maintaining 20ppm/°C max drift. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: Digitizing analog current/voltage signals from field transmitters (4–20mA, ±10V) in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary SAR ADC capturing sensor data at 250ksps for real-time loop control and diagnostics. Use Value: ±10.24V input range matches standard industrial signal levels; H-grade operation ensures reliability in cabinet-mounted controllers exposed to ambient heat. |
Use Scenario: High-accuracy monitoring of pressure, temperature, and flow in chemical plant DCS systems. IC Role / Device Role / Timing Role: Precision front-end ADC in distributed I/O modules requiring traceable metrology-grade linearity. Use Value: ±1.5LSB INL and 93.5dB SNR support sub-0.025% measurement uncertainty; integrated reference reduces calibration drift over time. |
| High Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: 16-bit channel-per-chip DAQ cards for oscilloscopes, spectrum analyzers, and vibration testers. IC Role / Device Role / Timing Role: High-throughput ADC with deterministic timing (no latency) for coherent multi-channel sampling. Use Value: Daisy-chain mode enables synchronized sampling across 8+ channels using one SPI controller; 28mW power allows fanless enclosure design. |
Use Scenario: Battery-powered handheld multimeters, insulation testers, and portable power quality analyzers. IC Role / Device Role / Timing Role: Core ADC in space-constrained instruments requiring wide dynamic range and low standby power. Use Value: Sleep mode draws only 300μW, extending battery life between measurements; MSOP package fits within 12mm × 12mm PCB footprints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7616BSTZ | 16-bit, 1MSPS, simultaneous sampling dual 8-channel ADC; requires external reference and higher supply current (43mW). | Targets multi-channel synchronized acquisition; lacks true bipolar ±10.24V input (requires external gain/level shift for ±10V signals). | Select when >250ksps aggregate throughput or simultaneous sampling across ≥2 channels is required; accept added BOM and layout complexity. |
| LTC2325HMS-16#PBF | Pin-compatible 16-bit, 1Msps variant with identical package, pinout, and H-grade rating but higher power (42mW) and no nap mode. | Same industrial operating environment support but optimized for maximum speed rather than power efficiency. | Select when sampling rate >250ksps is mandatory and power budget allows; retain same PCB layout and firmware interface. |
Compared with AD7616BSTZ and LTC2325HMS-16#PBF, the LTC2326HMS-16#PBF uniquely balances 250ksps throughput, ±10.24V direct-input capability, ultra-low 28mW active power, and seamless H-grade operation-making it optimal for cost-sensitive, thermally constrained, single-channel industrial DAQ nodes.
Availability
LTC2326HMS-16#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC2326HMS-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2326-16 product line was designed for precision, high-voltage industrial data acquisition-emphasizing true bipolar input capability, low-power nap/sleep modes, and robust operation from –40°C to +125°C.
FAQ
What is the operating temperature range of the LTC2326HMS-16#PBF?
The LTC2326HMS-16#PBF is rated for continuous operation from –40°C to +125°C (H-grade), with full electrical specifications guaranteed across this range. This makes it suitable for demanding industrial and automotive under-hood applications where ambient temperatures exceed standard commercial or industrial grade limits. The device's internal reference drift remains ≤20ppm/°C over this entire span.
Does the LTC2326HMS-16#PBF require an external reference?
No-the LTC2326HMS-16#PBF includes a factory-trimmed 2.048V internal bandgap reference and a 2× gain reference buffer, enabling immediate operation with ±10.24V input range using only the internal resources. REFIN and REFBUF pins support optional external reference overdrive (1.25–2.4V on REFIN or 2.5–5V on REFBUF) for enhanced accuracy or custom input scaling, but it is not required for basic functionality.
How does the daisy-chain mode work on the LTC2326HMS-16#PBF?
When CHAIN pin is driven high, the LTC2326HMS-16#PBF enters daisy-chain mode: RDL/SDI becomes SDI (serial data input), accepting data from the SDO of the preceding device in the chain. SDO then outputs the concatenated result-first the local 16-bit code, then the upstream code-enabling multiple LTC2326HMS-16#PBF devices to share one SPI bus with minimal control lines. This is confirmed in the Functional Block Diagram and Pin Functions section of the datasheet.
What is the power consumption of the LTC2326HMS-16#PBF during active conversion?
At 250ksps sampling rate with IN+ = –10.24V and IN– = 0V, the LTC2326HMS-16#PBF draws 9.9mA from VDD and 5.6mA from OVDD, totaling 28mW typical power dissipation. Power scales dynamically with sample rate due to automatic nap mode between conversions. In sleep mode, total current drops to 300μW-verified in the Power Requirements table (page 5) of the official datasheet.
Is the LTC2326HMS-16#PBF pin-compatible with other members of the LTC232x family?
Yes-the LTC2326HMS-16#PBF shares identical 16-lead MSOP package, pinout, and functional pin assignments with LTC2325HMS-16#PBF and LTC2327HMS-16#PBF. Differences lie in sampling rate (250ksps vs 1Msps vs 500ksps) and feature set (e.g., nap mode presence), but PCB layout and firmware interface remain fully interchangeable across these variants.
LTC2326HMS-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:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2326HMS-16#PBF FAQ
1.How can I place an order for LTC2326HMS-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2326HMS-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 LTC2326HMS-16#PBF reliable?
The price and inventory of LTC2326HMS-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 LTC2326HMS-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2326HMS-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2326HMS-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2326HMS-16#PBF?
LTC2326HMS-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2326HMS-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 LTC2326HMS-16#PBF?
For technical support, including LTC2326HMS-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2326HMS-16#PBF requirements.
6.How does Aetrix verify that LTC2326HMS-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2326HMS-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 LTC2326HMS-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2326HMS-16#PBF?
All LTC2326HMS-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2326HMS-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 LTC2326HMS-16#PBF part is unused and in its original packaging.
Return procedure for LTC2326HMS-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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