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Analog Devices Inc. LTC2328CMS-16#PBF
- Part No.:
- LTC2328CMS-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2328CMS-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,462
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Product details
Overview
LTC2328CMS-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 1 Msps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs and true bipolar ±10.24V input range. It features 93.5 dB SNR, ±1.5 LSB INL (max), and an integrated 2.048 V low-drift (20 ppm/°C max) reference. Designed for high-voltage industrial data acquisition, it operates from a single 5 V supply and delivers no missing codes at 16 bits.
For engineers reviewing the LTC2328CMS-16#PBF datasheet, LTC2328CMS-16#PBF pinout, LTC2328CMS-16#PBF application, or LTC2328CMS-16#PBF equivalent, key selection criteria include guaranteed 125°C operation (H-grade variant), SPI-compatible daisy-chain interface supporting 1.8–5 V I/O, internal conversion clock eliminating external timing, and automatic nap mode reducing power to 42 mW at 1 Msps.
Technical Context
The LTC2328CMS-16#PBF implements a charge redistribution SAR architecture with a 16-bit CDAC and differential comparator. Its pseudo-differential front-end uses resistor divider networks (2 kΩ total impedance per input) to level-shift ±2.5 × VREFBUF signals into the ADC core's 0–VREFBUF range, enabling true bipolar operation without external signal conditioning.
Conversion is initiated by a rising edge on CNV; the internal oscillator sets tCONV = 460–527 ns with zero cycle latency. The SPI-compatible serial interface supports both normal mode (RDL/SDI as bus enable) and daisy-chain mode (RDL/SDI as SDI), with SDO outputting 2's complement data MSB-first synchronized to SCK rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees full 65,536-level quantization with no missing codes across temperature. |
| Sampling Rate | 1 Msps - enables real-time capture of signals up to 500 kHz (Nyquist) with deterministic timing. |
| SNR | 93.5 dB (typ) at fIN = 2 kHz - supports >15.5 ENOB for precision measurement in noisy industrial environments. |
| INL | ±1.5 LSB (max) - ensures monotonicity and accurate end-point linearity for closed-loop control feedback. |
| Input Range | ±10.24 V true bipolar - directly interfaces with ±10 V industrial sensors and PLC analog I/O without level-shifting circuitry. |
| Reference | Integrated 2.048 V bandgap (20 ppm/°C max drift) with buffered 4.096 V output - eliminates external reference component count and layout sensitivity. |
| Power | 50 mW (typ) at 1 Msps; 300 µW in sleep mode - scales dynamically with sampling rate for energy-constrained portable instrumentation. |
Pinout & Package
Package: 16-lead plastic MSOP (3 mm × 4.9 mm, 0.5 mm pitch), RoHS-compliant, rated for 0°C to 70°C operating temperature (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5 V regulated bypass | On-chip LDO output requiring 2.2 µF ceramic decoupling; powers internal analog circuitry independently of main VDD. |
| VDD (2) | 5 V analog supply | Main 4.75–5.25 V supply for ADC core; requires 10 µF ceramic bypass to GND for noise immunity. |
| GND (3, 6, 16) | Analog/digital ground | Three dedicated ground pins minimize ground bounce and improve PSRR; must be connected to low-impedance ground plane. |
| IN+ (4) | Pseudo-differential analog input (+) | Accepts ±10.24 V relative to IN–; input impedance modeled as 2 kΩ + 45 pF; clamped to ±16.5 V absolute max. |
| IN– (5) | Pseudo-differential analog ground sense (–) | Reference point for IN+; limited to ±0.5 V range vs. GND; ties to remote sensor ground or system AGND. |
| REFBUF (7) | Reference buffer output | Nominally 4.096 V (2× REFIN); externally overdrivable 2.5–5 V; requires 47 µF ceramic decoupling for stability. |
| REFIN (8) | Internal reference output / buffer input | Nominally 2.048 V bandgap; overdrivable 1.25–2.4 V; bypassed with 100 nF ceramic to reduce noise and drift. |
| CNV (9) | Convert trigger input | Rising-edge–sensitive; initiates acquisition and conversion; logic levels referenced to OVDD. |
| CHAIN (10) | Daisy-chain mode select | Low = normal mode (RDL/SDI = bus enable); high = chain mode (RDL/SDI = SDI input for cascaded ADCs). |
| BUSY (11) | Conversion status indicator | Active-high open-drain output; asserts at CNV↑, deasserts when 16-bit result is ready on SDO. |
| RDL/SDI (12) | Serial bus control / data input | Function depends on CHAIN state; in chain mode, accepts MSB-first daisy-chain data from upstream ADC. |
| SCK (13) | Serial clock input | Drives SDO output timing; supports up to 100 MHz (10 ns period); logic levels referenced to OVDD. |
| SDO (14) | Serial data output | 2's complement 16-bit result shifted MSB-first on SCK rising edges; tri-state controlled by RDL/SDI in normal mode. |
| OVDD (15) | I/O digital supply | 1.71–5.25 V logic supply; sets voltage thresholds for all digital pins; bypassed with 0.1 µF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay or cycle latency | Enables deterministic real-time control loops with immediate access to conversion results after BUSY deasserts. |
| True bipolar ±10.24 V input range | Directly digitizes industrial ±10 V sensor outputs and actuator feedback without external op-amp level shifting. |
| Onboard single-shot capable reference buffer | Eliminates need for external buffer amplifier; supports fast wake-up (200 ms) and stable settling for burst-mode acquisition. |
| SPI-compatible daisy-chain mode | Allows synchronous sampling of multiple LTC2328CMS-16#PBF devices using one SCK and shared CNV, reducing controller GPIO count. |
| Automatic nap mode between conversions | Reduces dynamic power by >50% at 1 Msps versus continuous operation; current scales linearly with sample rate. |
| Guaranteed operation to 125°C (H-grade variants) | Validated performance across extended temperature range supports deployment in motor drives and downhole equipment. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: Digitizing ±10 V analog inputs from pressure, temperature, and flow transmitters in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary high-speed ADC interfacing directly to field sensors via twisted-pair wiring; provides synchronized 16-bit samples to FPGA-based control engine. Use Value: Eliminates external signal conditioning and reference components, reducing BOM cost and PCB area while maintaining <±0.01% FSR accuracy over 0–70°C. |
Use Scenario: High-fidelity monitoring of reactor vessel parameters (pressure, coolant temp, neutron flux) in distributed control systems. IC Role / Device Role / Timing Role: Precision data acquisition node in redundant safety-critical loops; operates continuously at 1 Msps with deterministic latency for alarm triggering. Use Value: 93.5 dB SNR and ±1.5 LSB INL ensure detection of sub-millivolt process anomalies; 125°C H-grade support enables cabinet-mounted deployment near heat sources. |
| High Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: 16-channel simultaneous-sampling DAQ card for oscilloscope-grade waveform capture in automated test equipment (ATE). IC Role / Device Role / Timing Role: Channel ADC in multi-device daisy-chain configuration; synchronized by common CNV and SCK to achieve <100 ps inter-channel skew. Use Value: Zero-latency conversion and internal clocking remove external timing jitter sources; SPI daisy-chain reduces host interface complexity versus parallel bus architectures. |
Use Scenario: Battery-powered handheld multimeter or power quality analyzer requiring high DC accuracy and AC spectral fidelity. IC Role / Device Role / Timing Role: Core ADC in low-power measurement front-end; enters sleep mode (<300 µW) between manual trigger events to extend battery life. Use Value: Integrated 2.048 V reference with 20 ppm/°C drift ensures calibration stability across ambient temperature swings; 50 mW active power enables >8-hour runtime on Li-ion cell. |
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, 5 Msps, ±5 V unipolar input; requires external reference and driver; no integrated reference buffer. | Higher resolution but narrower input range; suited for lab-grade instruments where ±5 V suffices and external precision references are acceptable. | Select AD7960BCPZ-RL7 only if 18-bit resolution and 5 Msps throughput outweigh added BOM cost, layout complexity, and lack of true bipolar support. |
| ADS8860IDRCT | 16-bit, 1 Msps, pseudo-differential, ±5 V input; internal reference (2.5 V); 92 dB SNR; 125°C rated; 16-pin WQFN. | Lower input range and SNR; smaller 3 mm × 3 mm package; lower power (25 mW); TI's MSP430-compatible interface. | Choose ADS8860IDRCT for space-constrained designs needing lower power and simpler layout, accepting ±5 V range limitation and 1.5 dB SNR trade-off. |
Compared with AD7960BCPZ-RL7 and ADS8860IDRCT, the LTC2328CMS-16#PBF uniquely combines true ±10.24 V bipolar input, integrated reference buffer, and daisy-chain capability in a single 16-lead MSOP-reducing system-level design effort for industrial voltage-range applications without sacrificing speed or resolution.
Availability
LTC2328CMS-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 (0°C to 70°C) performance.
Supply support for LTC2328CMS-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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2328-16 product line was developed by Linear Technology to address high-voltage, high-speed industrial data acquisition needs-emphasizing true bipolar input capability, integrated precision references, and robust SPI interfaces for factory automation and test equipment.
FAQ
What is the maximum operating temperature for the LTC2328CMS-16#PBF?
The LTC2328CMS-16#PBF is specified for 0°C to 70°C operation (C-grade). For extended temperature ranges, Analog Devices offers the LTC2328IMS-16#PBF (–40°C to 85°C) and LTC2328HMS-16#PBF (–40°C to 125°C). The LTC2328CMS-16#PBF itself is not characterized or guaranteed beyond 70°C.
Does the LTC2328CMS-16#PBF require an external reference?
No, the LTC2328CMS-16#PBF includes an integrated 2.048 V low-drift bandgap reference and a buffered 4.096 V output, enabling direct ±10.24 V bipolar operation without external components. External references may be used via REFIN or REFBUF pins for enhanced accuracy or different input ranges, but are not required for basic functionality.
How does the daisy-chain mode work on the LTC2328CMS-16#PBF?
In daisy-chain mode (CHAIN pin high), the RDL/SDI pin becomes a serial data input, allowing the LTC2328CMS-16#PBF to accept SDO data from an upstream ADC. Multiple LTC2328CMS-16#PBF devices can be cascaded on a single SPI bus, sharing CNV and SCK, with SDO of the last device returning the combined 16-bit results in sequence.
What is the power consumption of the LTC2328CMS-16#PBF during conversion?
The LTC2328CMS-16#PBF consumes 50 mW (typical) at 1 Msps with ±10.24 V input. Power scales with sampling rate due to automatic nap mode: at 100 ksps, dissipation drops to ~5 mW. In sleep mode, it draws only 300 µW, making the LTC2328CMS-16#PBF suitable for intermittent high-precision measurement tasks.
Can the LTC2328CMS-16#PBF interface with 1.8 V microcontrollers?
Yes, the LTC2328CMS-16#PBF supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels via its OVDD pin. When OVDD = 1.8 V, all digital inputs (CNV, CHAIN, RDL/SDI, SCK) recognize 0.2 × OVDD and 0.8 × OVDD thresholds, and SDO outputs are compatible with 1.8 V receivers-enabling seamless integration with ultra-low-voltage MCUs without level shifters.
LTC2328CMS-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):
- 1M
- 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:
- -
LTC2328CMS-16#PBF FAQ
1.How can I place an order for LTC2328CMS-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2328CMS-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 LTC2328CMS-16#PBF reliable?
The price and inventory of LTC2328CMS-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 LTC2328CMS-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2328CMS-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2328CMS-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2328CMS-16#PBF?
LTC2328CMS-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2328CMS-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 LTC2328CMS-16#PBF?
For technical support, including LTC2328CMS-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2328CMS-16#PBF requirements.
6.How does Aetrix verify that LTC2328CMS-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2328CMS-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 LTC2328CMS-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2328CMS-16#PBF?
All LTC2328CMS-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2328CMS-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 LTC2328CMS-16#PBF part is unused and in its original packaging.
Return procedure for LTC2328CMS-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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