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Analog Devices Inc. LTC2326HMS-16#TRPBF
- Part No.:
- LTC2326HMS-16#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2326HMS-16#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,242
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Product details
Overview
LTC2326HMS-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 integrates a 2.048V low-drift (20ppm/°C max) 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 no missing codes at full resolution.
For engineers reviewing the LTC2326HMS-16#TRPBF datasheet, LTC2326HMS-16#TRPBF pinout, LTC2326HMS-16#TRPBF application, or LTC2326HMS-16#TRPBF equivalent, key selection criteria include guaranteed operation to +125°C, daisy-chain mode support, zero-cycle latency, internal conversion clock, and nap/sleep power management (28mW typical / 300μW sleep).
Technical Context
The LTC2326HMS-16#TRPBF employs a charge redistribution capacitor DAC (CDAC) architecture with resistor divider networks on IN+ and IN– to level-shift and attenuate ±10.24V inputs to the 0–4.096V core ADC range. Acquisition uses a 45pF sampling capacitor and ~50Ω switch on-resistance, enabling 7MHz –3dB input linear bandwidth and 1µs full-scale transient response.
Conversion timing is governed by an internal oscillator (tCONV = 1.9–3µs), eliminating external clock dependencies. The control logic supports two operational modes: normal (RDL/SDI as bus enable) and chain (RDL/SDI as serial data input), with BUSY indicating conversion status and SDO outputting 2's complement data MSB-first on SCK rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes and full dynamic range quantization of ±10.24V input. |
| Sampling Rate | 250ksps - enables real-time capture of signals up to 125kHz Nyquist frequency. |
| INL (Max) | ±1.5LSB - ensures monotonicity and ≤0.023% full-scale linearity error across temperature. |
| SNR (Typ) | 93.5dB at fIN = 2kHz - corresponds to effective resolution >15.2 bits in high-fidelity measurement. |
| Supply | Single 5V VDD (4.75–5.25V) + independent 1.71–5.25V OVDD - decouples analog and digital power domains. |
| Operating Temp | –40°C to +125°C - qualified for harsh industrial and automotive under-hood environments. |
| Power (Active) | 28mW at 250ksps - scales with sample rate via automatic nap mode between conversions. |
| Reference | Integrated 2.048V bandgap (20ppm/°C max) + 2× buffer → 4.096V REFBUF - enables ±10.24V input without external components. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm, 0.5mm pitch), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5V LDO bypass | Stabilizes internal 2.5V supply; requires 2.2µF ceramic capacitor to GND for noise suppression. |
| VDD (2) | Analog power supply | Primary 5V supply (4.75–5.25V); must be bypassed with 10µF ceramic capacitor 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 ±10.24V relative to IN–; input impedance ~2.083kΩ; clamped ±16.5V absolute max. |
| IN– (5) | Pseudo-differential analog input (–) | Common-mode sense node; ±0.5V range w.r.t. GND; ties to remote ground or system reference plane. |
| REFBUF (7) | Reference buffer output | Nominally 4.096V; supports external overdrive (2.5–5V); requires 47µF ceramic decoupling. |
| REFIN (8) | Internal reference output / external reference input | 2.048V bandgap output (bypass with 100nF); accepts 1.25–2.4V external reference for enhanced accuracy. |
| CNV (9) | Convert trigger | Rising-edge initiated conversion; powers up ADC and starts acquisition phase; logic referenced to OVDD. |
| CHAIN (10) | Mode selector | High = daisy-chain mode (RDL/SDI becomes SDI); Low = normal mode (RDL/SDI enables SDO). |
| BUSY (11) | Conversion status indicator | Active-high open-drain signal; asserts at CNV↑, deasserts when conversion result is ready on SDO. |
| RDL/SDI (12) | Serial bus control / data input | Function depends on CHAIN state; enables SDO output or receives daisy-chain input data. |
| SCK (13) | Serial clock input | Drives SPI timing; supports up to 100MHz (10ns period); logic levels referenced to OVDD. |
| SDO (14) | Serial data output | 2's complement 16-bit result; outputs MSB first on SCK rising edge; tri-state controlled by RDL/SDI. |
| OVDD (15) | Digital I/O supply | Configurable 1.71–5.25V supply for all digital pins; enables interfacing with 1.8V/2.5V/3.3V/5V controllers. |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar ±10.24V input | Enables direct digitization of high-voltage sensor outputs (e.g., strain gauges, RTDs with gain) without external level-shifting. |
| No pipeline delay / zero cycle latency | Delivers first valid conversion result immediately after CNV edge-critical for deterministic real-time control loops. |
| Daisy-chain SPI mode | Allows synchronous readout of multiple LTC2326HMS-16#TRPBF devices using single SCK/SDO lines-reduces MCU GPIO count and PCB routing complexity. |
| Auto nap mode | Reduces current draw between conversions; power dissipation scales linearly with sampling rate-extends battery life in portable instrumentation. |
| Guaranteed 125°C operation | Qualified across full temperature range per H-grade spec-supports deployment in motor drives, power inverters, and downhole tools. |
| Onboard 2.048V reference + buffer | Eliminates need for external precision reference ICs and associated passive filtering-reduces BOM cost and board area by ~30%. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
|
Use Scenario: High-accuracy voltage monitoring of 4–20mA loop transmitters, thermocouple amplifiers, and isolation amplifier outputs in PLC backplanes. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing ±10.24V field signals with 250ksps throughput and deterministic CNV-triggered sampling. Use Value: 93.5dB SNR and ±1.5LSB INL ensure <0.025% measurement uncertainty over full industrial temperature range. |
Use Scenario: Closed-loop feedback acquisition in servo drives, pressure/flow controllers, and chemical dosing systems requiring sub-LSB stability. IC Role / Device Role / Timing Role: Real-time analog front-end ADC with zero-latency conversion for PID execution cycles synchronized to CNV edge. Use Value: Auto nap mode reduces thermal drift during idle periods; 20ppm/°C reference drift maintains calibration integrity at 125°C ambient. |
| High Speed Data Acquisition | ATE Test Equipment |
|
Use Scenario: Modular DAQ modules capturing transient waveforms from vibration sensors, acoustic emission detectors, and partial discharge monitors. IC Role / Device Role / Timing Role: High-fidelity digitizer with 7MHz input bandwidth and 1µs full-scale settling-enabling accurate FFT-based spectral analysis. Use Value: 32k-point FFT at 250ksps yields 7.6Hz bin resolution; 93.5dB SNR supports >15-bit ENOB for precision diagnostics. |
Use Scenario: Channel-per-pin digitization in semiconductor ATE systems requiring simultaneous sampling across multiple DUT interfaces. IC Role / Device Role / Timing Role: Synchronized multi-device acquisition using daisy-chain SPI mode and common CNV clock distribution. Use Value: Identical tCONV (1.9–3µs) and tBUSYLH (13ns) across units ensures <5ns inter-channel skew-critical for parametric test repeatability. |
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 |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, single-ended input only; external reference required; no integrated buffer; 1.8V-only I/O. | Higher speed but lacks true bipolar input and on-chip reference-requires additional signal conditioning and reference circuitry. | Select when sampling rate >250ksps is mandatory and system already provides precision ±10.24V signal conditioning and reference. |
| AD7616BSTZ | 16-bit, dual 1MSPS, true bipolar ±10.24V, but uses sigma-delta architecture; 125°C rating; requires external reference. | Higher channel count and oversampling capability, but sigma-delta latency (~10µs) prevents use in real-time control loops. | Select for multi-channel, lower-noise, lower-power applications where deterministic latency is not critical (e.g., environmental monitoring). |
Compared with ADS8860IDRCT and AD7616BSTZ, the LTC2326HMS-16#TRPBF uniquely combines 250ksps SAR speed, integrated ±10.24V bipolar front-end, on-chip reference/buffer, and guaranteed 125°C operation-making it optimal for space-constrained, high-reliability industrial control nodes where component count and thermal robustness are prioritized over raw throughput or channel density.
Availability
LTC2326HMS-16#TRPBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition modules requiring stable component supply across extended temperature ranges.
Supply support for LTC2326HMS-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2326 family was designed specifically for high-accuracy, high-voltage industrial data acquisition-emphasizing low drift, wide temperature operation, and minimal external component count in space-constrained embedded systems.
FAQ
What is the maximum operating temperature of the LTC2326HMS-16#TRPBF?
The LTC2326HMS-16#TRPBF is rated for continuous operation from –40°C to +125°C (H-grade), with thermal shutdown protection and guaranteed performance across this full range. Its 20ppm/°C reference drift and ±1.5LSB INL specification are validated at +125°C, making it suitable for motor drive control, power converter monitoring, and other high-ambient-temperature applications where standard industrial-grade ADCs fail.
Does the LTC2326HMS-16#TRPBF require an external reference?
No, the LTC2326HMS-16#TRPBF includes a factory-trimmed 2.048V bandgap reference and a 2× gain reference buffer, delivering 4.096V at REFBUF to support the ±10.24V input range without external components. REFIN can be overdriven with a higher-accuracy external reference (1.25–2.4V) if improved initial accuracy or lower drift is needed, but it is not required for basic operation.
How does the daisy-chain mode work on the LTC2326HMS-16#TRPBF?
When CHAIN pin is driven high, the LTC2326HMS-16#TRPBF enters daisy-chain mode: RDL/SDI becomes SDI (serial data input), accepting data from the SDO of the preceding device. SDO then outputs the concatenated result-first 16 bits from upstream device, followed by local 16-bit result-enabling synchronous readout of multiple converters using one SCK and one SDO line, reducing controller resource usage.
What power savings does the nap mode provide in the LTC2326HMS-16#TRPBF?
In nap mode, the LTC2326HMS-16#TRPBF reduces supply current from 11.5mA (active) to 0.1mA between conversions, cutting average power proportionally to duty cycle. At 250ksps, active time is ~3µs per conversion, resulting in ~0.075% duty cycle and average current of ~8.6mA. This dynamic scaling extends battery life in portable instrumentation and lowers thermal load in dense PCB layouts.
Can the LTC2326HMS-16#TRPBF interface directly with a 1.8V microcontroller?
Yes, the LTC2326HMS-16#TRPBF supports 1.8V–5V logic levels via its independent OVDD supply pin. When OVDD = 1.8V, all digital pins (CNV, CHAIN, BUSY, RDL/SDI, SCK, SDO) operate at 1.8V logic thresholds (VIH = 1.44V, VIL = 0.36V), enabling seamless connection to low-voltage MCUs without level shifters-while maintaining full analog performance from the separate 5V VDD supply.
LTC2326HMS-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:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2326HMS-16#TRPBF FAQ
1.How can I place an order for LTC2326HMS-16#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2326HMS-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 LTC2326HMS-16#TRPBF reliable?
The price and inventory of LTC2326HMS-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 LTC2326HMS-16#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2326HMS-16#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2326HMS-16#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2326HMS-16#TRPBF?
LTC2326HMS-16#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2326HMS-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 LTC2326HMS-16#TRPBF?
For technical support, including LTC2326HMS-16#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2326HMS-16#TRPBF requirements.
6.How does Aetrix verify that LTC2326HMS-16#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2326HMS-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 LTC2326HMS-16#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2326HMS-16#TRPBF?
All LTC2326HMS-16#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2326HMS-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 LTC2326HMS-16#TRPBF part is unused and in its original packaging.
Return procedure for LTC2326HMS-16#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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