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Analog Devices Inc. LTC2328IMS-16#PBF
- Part No.:
- LTC2328IMS-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2328IMS-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:124
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Product details
Overview
LTC2328IMS-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 ±1.5 LSB INL (max), 93.5 dB SNR (typ), and an integrated 2.048 V low-drift (20 ppm/°C max) reference with onboard buffer. 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 LTC2328IMS-16#PBF datasheet, LTC2328IMS-16#PBF pinout, LTC2328IMS-16#PBF application, or LTC2328IMS-16#PBF equivalent, key selection criteria include guaranteed 125°C operation (I-grade), SPI-compatible daisy-chain interface supporting 1.8–5 V I/O, zero-cycle latency, internal conversion clock, and 50 mW typical power dissipation at full throughput.
Technical Context
The LTC2328IMS-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 (2 kΩ total impedance) to attenuate and level-shift ±2.5 × VREFBUF signals into the 0–VREFBUF core range, enabling true bipolar operation without external level-shifting circuitry.
Conversion is initiated by a rising edge on CNV; an internal oscillator eliminates external timing dependencies. The device supports two operational modes-normal (RDL/SDI as bus enable) and daisy-chain (RDL/SDI as serial data input)-controlled by the CHAIN pin, with 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 65,536-level quantization across ±10.24 V range. |
| Sampling Rate | 1 Msps - enables real-time capture of signals up to 500 kHz Nyquist bandwidth with zero pipeline delay. |
| INL (Max) | ±1.5 LSB - ensures monotonicity and <0.0023% full-scale linearity error for precision control loop feedback. |
| SNR (Typ) | 93.5 dB - corresponds to ~15.6 effective bits at fIN = 2 kHz, critical for high-fidelity sensor digitization. |
| Reference | Integrated 2.048 V bandgap (20 ppm/°C max drift) with 2× buffered output (4.096 V) - eliminates need for external reference in most industrial designs. |
| Power (1 Msps) | 50 mW typical - scales with sample rate via automatic nap mode, reducing dynamic power in burst-sampling systems. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including PLC backplanes and motor drive cabinets. |
Pinout & Package
Package: 16-lead plastic MSOP (3 mm × 4.9 mm, 0.5 mm pitch), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5 V regulated bypass | Internal LDO output requiring 2.2 µF ceramic decoupling; powers internal analog circuitry independently of VDD noise. |
| VDD (2) | 5 V main supply | 4.75–5.25 V input powering ADC core and reference; requires 10 µF ceramic bypass to GND. |
| GND (3,6,16) | Analog/digital ground | Three dedicated ground pins minimize ground bounce and separate return paths for analog, digital, and reference sections. |
| IN+ (4) | Pseudo-differential analog input | Accepts true bipolar signal relative to IN–; input range ±2.5 × VREFBUF (±10.24 V when VREFBUF = 4.096 V). |
| IN– (5) | Common-mode sense reference | ±500 mV range w.r.t. GND; must connect to system ground or remote sense point to establish common-mode baseline. |
| REFBUF (7) | Buffered reference output | Nominally 4.096 V; decoupled with 47 µF ceramic capacitor; can be overdriven externally (2.5–5 V) when REFIN = 0 V. |
| REFIN (8) | Internal reference output / external reference input | 2.048 V bandgap output (bypass with 100 nF); accepts 1.25–2.4 V external references for enhanced accuracy. |
| CNV (9) | Convert trigger | Rising-edge–activated; initiates acquisition and conversion; logic levels referenced to OVDD. |
| CHAIN (10) | Interface mode selector | Low = normal mode (RDL/SDI = bus enable); high = daisy-chain mode (RDL/SDI = SDI input). |
| BUSY (11) | Conversion status indicator | Active-high open-drain output signaling conversion in progress; synchronized to CNV edge. |
| RDL/SDI (12) | Configurable serial interface pin | Function depends on CHAIN state: bus enable (low) or serial data input (high); supports multi-device daisy chains. |
| SCK (13) | Serial clock input | Accepts 10 ns min period (100 MHz max); controls data shift-out timing on SDO; 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 interface supply | 1.71–5.25 V logic supply; sets voltage thresholds for all digital pins; bypass with 0.1 µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar ±10.24 V input | Enables direct digitization of industrial ±10 V signals (e.g., 4–20 mA transmitters with shunt) without external op-amp level shifting. |
| No cycle latency | Delivers first valid conversion result immediately after CNV rising edge-critical for deterministic real-time control loops. |
| Daisy-chain SPI interface | Allows synchronous sampling of multiple LTC2328IMS-16#PBF devices using one SCK and SDO line, reducing host GPIO count and PCB routing complexity. |
| Auto nap mode | Reduces current draw between conversions proportionally to sample rate-cuts power by >70% at 100 ksps versus continuous 1 Msps operation. |
| Guaranteed 125°C operation (H-grade variant) | Validated performance up to junction temperature of 150°C (θJA = 110°C/W), supporting deployment in high-ambient motor control enclosures. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: Digitizing analog field signals (e.g., 4–20 mA current loops, ±10 V sensor outputs) in modular PLC I/O modules. IC Role / Device Role / Timing Role: Primary high-speed ADC capturing process variables (temperature, pressure, flow) at ≥100 ksps for closed-loop PID execution. Use Value: ±1.5 LSB INL ensures accurate setpoint tracking; integrated reference eliminates calibration drift over temperature in unattended factory deployments. | Use Scenario: High-precision monitoring of chemical reactor parameters (pH, dissolved oxygen, conductivity) in distributed control systems (DCS). IC Role / Device Role / Timing Role: Front-end ADC in isolated analog input cards, interfacing with instrumentation amplifiers and anti-alias filters. Use Value: 93.5 dB SNR enables detection of low-level electrochemical signals; daisy-chain capability simplifies synchronization across multi-channel DCS racks. |
| High Speed Data Acquisition | ATE Test Equipment |
Use Scenario: Portable or benchtop DAQ systems requiring 16-bit resolution and 1 Msps throughput for vibration analysis or power quality monitoring. IC Role / Device Role / Timing Role: Core digitizer in USB/Ethernet-connected DAQ modules, directly interfaced to FPGA or ARM Cortex-M7 microcontroller. Use Value: Zero-latency conversion allows precise timestamping of transient events (e.g., arc flash detection); 50 mW power enables battery-operated field instruments. | Use Scenario: Channel-per-pin digitization in automated test equipment for semiconductor parametric testing and functional validation. IC Role / Device Role / Timing Role: High-accuracy ADC in parallel test heads, capturing device-under-test (DUT) response waveforms with minimal jitter. Use Value: –111 dB THD supports clean spectral analysis of DUT output; internal oscillator removes clock skew between channels in multi-ADC configurations. |
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 input range; requires external reference and separate power supplies for analog/digital sections. | Higher resolution but narrower input range; lacks integrated reference buffer and true bipolar support without external circuitry. | Select when >16-bit resolution and >1 Msps are mandatory, and board space allows external reference and dual-supply design. |
| ADS8860IRGET | 16-bit, 1 Msps, pseudo-differential, ±VREF input; 2.5 V internal reference (25 ppm/°C), no reference buffer; SPI-only interface. | No integrated reference buffer or true bipolar capability; lower SNR (91 dB) and higher INL (±2.5 LSB); rated only to 85°C. | Select for cost-sensitive, non-bipolar applications where external buffering and tighter temperature grading are not required. |
Compared with AD7960BCPZ-RL7 and ADS8860IRGET, the LTC2328IMS-16#PBF uniquely combines ±10.24 V true bipolar input, integrated low-drift reference buffer, and guaranteed 85°C operation in a single 16-lead MSOP-reducing BOM count and layout complexity for industrial voltage-range applications.
Availability
LTC2328IMS-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 across extended temperature ranges and long production lifecycles.
Supply support for LTC2328IMS-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 family was designed specifically for industrial and instrumentation applications demanding high DC accuracy, wide dynamic range, and robust operation in harsh electrical environments-emphasizing integrated references, true bipolar inputs, and extended temperature reliability.
FAQ
What is the maximum operating temperature for the LTC2328IMS-16#PBF?
The LTC2328IMS-16#PBF is specified for operation from –40°C to +85°C (I-grade). Its absolute maximum junction temperature is 150°C, and thermal resistance θJA is 110°C/W. This rating makes the LTC2328IMS-16#PBF suitable for industrial control cabinets and motor drive environments where ambient temperatures exceed commercial grade limits.
Does the LTC2328IMS-16#PBF require an external reference?
No, the LTC2328IMS-16#PBF includes a factory-trimmed 2.048 V bandgap reference with 20 ppm/°C max drift and an integrated 2× reference buffer delivering 4.096 V at REFBUF. This enables a ±10.24 V input range without external components. However, REFIN accepts 1.25–2.4 V external references for improved accuracy, or REFBUF can be overdriven (2.5–5 V) with REFIN grounded.
How does the daisy-chain mode work on the LTC2328IMS-16#PBF?
When the CHAIN pin is high, the LTC2328IMS-16#PBF enters daisy-chain mode: RDL/SDI becomes SDI (serial data input), accepting data from the previous device's SDO. SDO then outputs the concatenated result-first the local 16-bit code, then upstream data. This allows synchronous sampling of multiple LTC2328IMS-16#PBF devices using a single SCK and SDO line, simplifying multi-channel timing.
What is the power consumption of the LTC2328IMS-16#PBF at 1 Msps?
At 1 Msps with IN+ = –10.24 V and IN– = 0 V, the LTC2328IMS-16#PBF draws 14.5 mA from VDD and 10 mA from OVDD, totaling 50 mW typical power dissipation. In nap mode between conversions, current drops to 0.4 mA (42 mW), and in sleep mode it falls to 300 µA (0.3 mW), enabling significant power savings in burst-sampling applications.
Is the LTC2328IMS-16#PBF pin-compatible with other members of the LTC2328 family?
Yes, all LTC2328 variants-including LTC2328CMS-16#PBF (0°C to 70°C), LTC2328IMS-16#PBF (–40°C to 85°C), and LTC2328HMS-16#PBF (–40°C to 125°C)-share identical 16-lead MSOP packaging, pinout, and electrical specifications. Only the temperature grade and part marking differ, allowing drop-in replacement across operating environments without PCB redesign.
LTC2328IMS-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:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2328IMS-16#PBF FAQ
1.How can I place an order for LTC2328IMS-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2328IMS-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 LTC2328IMS-16#PBF reliable?
The price and inventory of LTC2328IMS-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 LTC2328IMS-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2328IMS-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2328IMS-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2328IMS-16#PBF?
LTC2328IMS-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2328IMS-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 LTC2328IMS-16#PBF?
For technical support, including LTC2328IMS-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2328IMS-16#PBF requirements.
6.How does Aetrix verify that LTC2328IMS-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2328IMS-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 LTC2328IMS-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2328IMS-16#PBF?
All LTC2328IMS-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2328IMS-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 LTC2328IMS-16#PBF part is unused and in its original packaging.
Return procedure for LTC2328IMS-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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