My Inquiry
My Account
Analog Devices Inc. LTC2328IMS-18#PBF
- Part No.:
- LTC2328IMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2328IMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,034
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2328IMS-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1 Msps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs, ±10.24V true bipolar input range, 95 dB SNR (typ), and ±5 LSB INL (max). It operates from a single 5 V supply, integrates a low-drift 2.048 V internal reference and reference buffer, and targets high-precision industrial data acquisition systems requiring wide dynamic range and DC accuracy.
For engineers reviewing the LTC2328IMS-18#PBF datasheet, LTC2328IMS-18#PBF pinout, LTC2328IMS-18#PBF application, or LTC2328IMS-18#PBF equivalent, key selection considerations include guaranteed 18-bit no-missing-codes operation, daisy-chain SPI interface compatibility across 1.8–5 V logic levels, internal conversion clock eliminating external timing constraints, and −40°C to +85°C industrial temperature rating.
Technical Context
The LTC2328IMS-18#PBF implements a charge-redistribution SAR architecture with a 2.048 V factory-trimmed bandgap reference buffered to 4.096 V, enabling ±10.24 V input range via 2.5× scaling. Its pseudo-differential front-end uses resistor-divider networks (2 kΩ input impedance) and clamped ESD protection, supporting common-mode rejection up to 66 dB at 500 kHz.
Conversion is initiated by a rising edge on CNV, with fixed 460–527 ns conversion time set by an internal oscillator-eliminating pipeline delay and cycle latency. The device supports both normal mode (RDL/SDI as bus enable) and daisy-chain mode (RDL/SDI as serial data input), with SDO output in 2's complement format synchronized to SCK rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit-guaranteed no missing codes over full temperature range. |
| Sampling Rate | 1 Msps-enables real-time capture of signals up to 500 kHz Nyquist bandwidth. |
| SNR | 95 dB (typ) at fIN = 2 kHz-supports >15.5 effective bits for precision measurement. |
| INL | ±5 LSB (max)-ensures monotonicity and < ±0.002% full-scale linearity error. |
| Input Range | ±10.24 V true bipolar-matches standard industrial sensor outputs without external level-shifting. |
| Reference | 2.048 V internal bandgap (20 ppm/°C max drift)-reduces BOM count and improves thermal stability vs. external references. |
| Power Dissipation | 50 mW (typ) at 1 Msps-scales with sampling rate; drops to 300 µW in sleep mode. |
Pinout & Package
Package: 16-lead plastic MSOP (3 mm × 4.9 mm, 0.65 mm pitch), rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5 V LDO bypass | Internal regulator output; requires 2.2 µF ceramic capacitor to GND for stable 2.5 V supply to analog core. |
| VDD (2) | 5 V analog supply | Main power rail (4.75–5.25 V); bypassed with 10 µF ceramic capacitor to minimize switching noise. |
| GND (3,6,16) | Analog/digital ground | Three dedicated ground pins reduce ground bounce and improve PSRR in mixed-signal layout. |
| IN+ (4) | Pseudo-differential analog input | Accepts ±10.24 V differential swing relative to IN−; input impedance modeled as 2 kΩ + 45 pF. |
| IN− (5) | Common-mode sense reference | Fixed ±500 mV range w.r.t. GND; must connect to system ground plane or remote sense point. |
| REFBUF (7) | Buffered reference output | Nominally 4.096 V; decoupled with 47 µF ceramic capacitor; can be overdriven externally (2.5–5 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 reference for improved accuracy. |
| CNV (9) | Convert trigger | Rising-edge–sensitive control input; initiates acquisition and conversion sequence with no setup/hold timing required. |
| CHAIN (10) | Daisy-chain mode select | High = enables RDL/SDI as serial data input for multi-ADC cascading; low = RDL/SDI acts as SDO bus enable. |
| BUSY (11) | Conversion status indicator | Active-high open-drain output signaling conversion progress; synchronous with internal clock, not SCK. |
| RDL/SDI (12) | Serial bus control / data input | Mode-dependent: bus enable (CHAIN = low) or SDI (CHAIN = high); supports 1.8–5 V logic levels. |
| SCK (13) | Serial clock input | Drives SDO output timing; supports up to 100 MHz (10 ns period); rising-edge–sampled data transfer. |
| SDO (14) | Serial data output | 2's complement 18-bit result shifted MSB-first on SCK rising edges; tri-state when RDL = low or CHAIN = low. |
| OVDD (15) | I/O interface supply | Digital I/O voltage rail (1.71–5.25 V); sets logic thresholds for all digital pins; bypassed with 0.1 µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay or cycle latency | Enables deterministic real-time control loops with sub-microsecond conversion turnaround. |
| Onboard single-shot capable reference buffer | Eliminates need for external op-amp buffer; supports fast wake-up (<200 ms) after sleep mode. |
| SPI-compatible daisy-chain mode | Reduces host GPIO count and simplifies PCB routing for multi-channel synchronized sampling. |
| Auto-nap between conversions | Dynamic power scaling reduces average current draw proportionally to actual sample rate. |
| Guaranteed operation to 85°C | Validated performance across full industrial temperature range without derating. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-accuracy analog input modules acquiring 4–20 mA current loop signals and ±10 V sensor outputs in factory automation cabinets. IC Role / Device Role / Timing Role: Primary ADC digitizing bipolar industrial voltage standards with guaranteed monotonicity and minimal gain drift. Use Value: Eliminates external signal conditioning for ±10.24 V range, reducing component count while maintaining 18-bit integrity across temperature. | Use Scenario: Distributed I/O systems monitoring pressure, temperature, and flow transmitters in oil & gas refineries. IC Role / Device Role / Timing Role: Precision SAR ADC providing synchronized, low-latency sampling for closed-loop feedback control. Use Value: 1 Msps throughput with no latency enables real-time derivative calculations and predictive maintenance algorithms. |
| High Speed Data Acquisition | ATE |
Use Scenario: Modular DAQ cards capturing transient waveforms from vibration sensors and acoustic emission detectors. IC Role / Device Role / Timing Role: High-SNR ADC delivering 95 dB SNR at 2 kHz for spectral analysis and harmonic distortion measurement. Use Value: Integrated 2.048 V reference with 20 ppm/°C drift ensures calibration stability across environmental test chambers. | Use Scenario: Automated test equipment validating high-resolution DACs and precision amplifiers using FFT-based error analysis. IC Role / Device Role / Timing Role: Reference-grade ADC serving as golden standard for INL/DNL metrology with traceable 18-bit resolution. Use Value: Guaranteed ±5 LSB INL and no missing codes allow direct comparison against DUT specifications without interpolation. |
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 |
|---|---|---|---|
| AD7606C-18 | 8-channel simultaneous sampling; integrated analog front-end with PGA; 225 mW typical power at 1 MSPS. | Targeted at multi-channel systems requiring channel-to-channel isolation; lacks daisy-chain SPI mode. | Select when simultaneous sampling across ≥2 channels is required and board space permits larger LQFP package. |
| ADS8860 | Single-ended inputs only; 1 MSPS; 92.5 dB SNR; 1.8 V supply; no internal reference. | Optimized for low-voltage, battery-powered instrumentation; requires external reference and driver. | Select for portable applications where 5 V supply and bipolar input are unnecessary and ultra-low power is critical. |
Compared with AD7606C-18 and ADS8860, the LTC2328IMS-18#PBF uniquely combines true bipolar pseudo-differential input, integrated 2.048 V reference with buffer, daisy-chain capability, and MSOP packaging-making it optimal for space-constrained, single-channel industrial DAQ where ±10.24 V compliance and minimal external components are prioritized.
Availability
LTC2328IMS-18#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-18#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 LTC2328IMS-18#PBF belongs to ADI's precision SAR ADC product line, engineered specifically for industrial and instrumentation applications demanding high DC accuracy, wide dynamic range, and robust operation in harsh environments.
FAQ
What is the operating temperature range of the LTC2328IMS-18#PBF?
The LTC2328IMS-18#PBF is specified for operation from −40°C to +85°C (Industrial grade). This is confirmed in the Absolute Maximum Ratings table and Order Information section, where "IMS" denotes the Industrial temperature grade. It maintains full performance-including ±5 LSB INL, 95 dB SNR, and 1 Msps throughput-across this entire range without derating.
Does the LTC2328IMS-18#PBF require an external reference?
No, the LTC2328IMS-18#PBF does not require an external reference. It integrates a factory-trimmed 2.048 V bandgap reference and a buffered 4.096 V output (REFBUF), enabling its standard ±10.24 V input range. REFIN and REFBUF pins support optional external reference overdrive for enhanced accuracy or different input ranges, but the internal reference is fully functional out-of-box.
How does the daisy-chain mode work on the LTC2328IMS-18#PBF?
Daisy-chain mode is enabled by pulling the CHAIN pin high. In this mode, RDL/SDI becomes a serial data input, allowing multiple LTC2328IMS-18#PBF devices to be cascaded. The SDO of the upstream device connects to the RDL/SDI of the downstream device, and a single SCK synchronizes all conversions. BUSY remains individual per device, while SDO outputs propagate results sequentially on the shared bus.
What is the power consumption of the LTC2328IMS-18#PBF during active conversion?
At 1 Msps sampling rate with IN+ = −10.24 V and IN− = 0 V, the LTC2328IMS-18#PBF draws 14.5 mA from VDD and 10 mA from OVDD, totaling 50 mW typical power dissipation. Power scales linearly with sample rate in nap mode, and drops to 300 µW in sleep mode-verified in the Power Requirements table under IVDD, IOVDD, and PD columns.
Is the LTC2328IMS-18#PBF pin-compatible with other members of the LTC2328 family?
Yes, the LTC2328IMS-18#PBF shares identical pinout and footprint with LTC2328CMS-18#PBF (Commercial) and LTC2328HMS-18#PBF (High Temp). All variants use the same 16-lead MSOP package and functionally identical pin assignments, differing only in temperature grade and associated AC/DC specifications-enabling drop-in replacement during design-in or qualification phases.
LTC2328IMS-18#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:
- 18
- 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-18#PBF FAQ
1.How can I place an order for LTC2328IMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2328IMS-18#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-18#PBF reliable?
The price and inventory of LTC2328IMS-18#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-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2328IMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2328IMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2328IMS-18#PBF?
LTC2328IMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2328IMS-18#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-18#PBF?
For technical support, including LTC2328IMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2328IMS-18#PBF requirements.
6.How does Aetrix verify that LTC2328IMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2328IMS-18#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-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2328IMS-18#PBF?
All LTC2328IMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2328IMS-18#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-18#PBF part is unused and in its original packaging.
Return procedure for LTC2328IMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2328IMS-18#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
