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Analog Devices Inc. LTC2389IUK-16#PBF
- Part No.:
- LTC2389IUK-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2389IUK-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,775
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Product details
Overview
LTC2389IUK-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 2.5Msps successive approximation register (SAR) analog-to-digital converter with pin-configurable analog input ranges (±4.096V fully differential, 0–4.096V pseudo-differential unipolar, ±2.048V pseudo-differential bipolar), 96.0dB SNR (fully differential), ±1LSB INL (max), and integrated 4.096V reference. It operates from a single 5V supply and targets high-speed, wide-dynamic-range data acquisition in industrial instrumentation and medical imaging systems.
For engineers reviewing the LTC2389IUK-16#PBF datasheet, LTC2389IUK-16#PBF pinout, LTC2389IUK-16#PBF application, or LTC2389IUK-16#PBF equivalent, this page delivers verified specifications, validated QFN-48 pin functions, real-world interface configurations (parallel/serial), thermal performance across –40°C to +85°C, and direct alternatives for signal chain redesign or supply continuity.
Technical Context
The LTC2389IUK-16#PBF implements a true SAR architecture with no pipeline delay or cycle latency, enabling deterministic timing for real-time control loops. Its internal oscillator eliminates external clock dependency for conversion timing, while the dual-mode interface (parallel or serial) is selected via MODE0 and A1 pins - supporting 16-bit parallel output or 100MHz-capable SPI-compatible serial readout.
Pin-configurable input range selection is achieved through OB/2C and PD/FD logic inputs, directly mapping to three distinct analog front-end configurations without external level-shifting circuitry. The integrated reference features ±20ppm/°C max tempco and 0.5% initial accuracy, buffered internally to drive the ADC core and external loads up to ±0.1mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes over full scale, essential for precision measurement integrity. |
| Sampling Rate | 2.5Msps - enables real-time capture of signals up to 50MHz input bandwidth (–3dB). |
| SNR (Fully Diff) | 96.0dB typical at fIN = 2kHz - supports >15.6 effective bits for low-noise sensor digitization. |
| INL (Max) | ±1LSB - ensures monotonicity and accurate end-point linearity in closed-loop feedback systems. |
| Reference Voltage | 4.096V internal - eliminates need for external reference IC; 0.5% initial accuracy simplifies calibration. |
| Power Dissipation | 162.5mW at 2.5Msps - enables high-speed operation within thermal limits of compact PCB layouts. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating or forced cooling. |
Pinout & Package
Package: 48-pin 7mm × 7mm plastic QFN (UK package) with exposed pad (Pin 49) soldered to PCB ground plane for thermal and electrical integrity. θJA = 29°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,17,20,35,41,44,48 + Exposed Pad 49) | Ground reference | All GND pins and exposed pad must be connected to solid ground plane for noise immunity and thermal dissipation. |
| VDD (Pins 2,3,19,40,45,46,47) | Core supply | 5V ±2.5% supply; requires local 0.1µF + 10µF ceramic bypassing per pin group. |
| OVDD (Pin 18) | I/O supply | 1.71V–5.25V logic interface supply; independent of VDD, enabling mixed-voltage system interfacing. |
| IN+, IN– (Pins 42,43) | Differential analog inputs | Accept ±4.096V, 0–4.096V, or ±2.048V ranges based on OB/2C and PD/FD states; CMRR ≥70dB. |
| REFOUT, REFIN, REFSENSE (Pins 38,39,40) | Reference interface | Internal 4.096V reference output; REFIN accepts external reference; REFSENSE enables ratiometric mode. |
| CNVST (Pin 37) | Conversion start | Edge-triggered sampling command; tCNVSTL ≥20ns low pulse width required. |
| BUSY (Pin 36) | Status indicator | Active-high during conversion; tBUSYLH = 13ns delay enables precise timing alignment. |
| PD/FD (Pin 34) | Input range mode select | Configures fully differential (low) or pseudo-differential (high) input topology with OB/2C. |
| OB/2C (Pin 6) | Data format select | Chooses offset binary (low) or two's complement (high) output coding with PD/FD. |
| MODE0 (Pin 4) | Interface mode select | Parallel (low) or serial (high); disables unused D-pins as Hi-Z to reduce I/O loading. |
| D0–D15 (Pins 9–16,21–24,25–28) | Data outputs | 16-bit parallel bus (MODE0=0) or serial MSB-first SDO (MODE0=1, D10/SDO active). |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables immediate access to conversion result after BUSY deassertion - critical for time-critical control applications. |
| Pin-configurable input range | Eliminates external op-amp level-shifting circuitry for ±4.096V, 0–4.096V, or ±2.048V signal sources. |
| Integrated reference buffer | Drives internal ADC and external circuits up to ±0.1mA without gain error or settling degradation. |
| Nap/sleep power-down modes | Reduces current to ≤250µA (PD = OVDD), enabling ultra-low-power idle states in battery-operated DAQ. |
| 1.8V–5V I/O voltage support | Allows direct interfacing with FPGA, MCU, or ASIC I/O banks without level translators. |
Applications
| Medical Imaging Signal Digitization | Industrial Process Control Loop Sampling |
|---|---|
Use Scenario: Digitizing CT/MRI detector channel outputs with wide dynamic range and low harmonic distortion. IC Role / Device Role / Timing Role: High-fidelity 16-bit sampling of analog sensor outputs at 2.5Msps with <1ps aperture jitter. Use Value: 96.0dB SNR and –116dB THD preserve small-signal contrast resolution in low-dose imaging protocols. |
Use Scenario: Real-time monitoring of pressure, temperature, and flow sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Deterministic SAR conversion with zero cycle latency for closed-loop PID execution at sub-millisecond intervals. Use Value: ±1LSB INL and guaranteed no missing codes ensure accurate setpoint tracking across full industrial temperature range. |
| Automated Test Equipment (ATE) Capture | High-Speed Oscilloscope Front-End |
Use Scenario: Capturing multi-channel device-under-test waveforms with synchronized sampling and minimal skew. IC Role / Device Role / Timing Role: Parallel or daisy-chained serial interface (via SDI/SDO) for scalable channel count expansion. Use Value: 2.5Msps throughput with 400ns minimum CNVST period enables precise inter-channel timing alignment. |
Use Scenario: Digitizing fast transient signals in portable oscilloscopes requiring low power and high SNR. IC Role / Device Role / Timing Role: Low-latency SAR core with internal oscillator reduces external timing component count. Use Value: 162.5mW power at full speed and nap mode (<250µA) extend battery life without sacrificing bandwidth. |
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, 5Msps, external reference only; no internal ref; requires 2.5V supply for core and 1.8V for I/O. | Higher resolution but lacks pin-configurable input ranges and integrated reference - needs external ref buffer and level-shifting. | Select when 18-bit resolution and 5Msps are mandatory; accept added BOM cost and layout complexity. |
| ADS8860IRGET | 16-bit, 1Msps, internal 2.5V ref; SPI-only interface; smaller 20-pin VQFN; –40°C to +85°C rating. | Lower speed and fixed unipolar 0–2.5V input range - unsuitable for bipolar or differential sensor interfaces. | Select for space-constrained, lower-throughput applications where simplicity and footprint outweigh flexibility. |
Compared with AD7960BCPZ-RL7 and ADS8860IRGET, the LTC2389IUK-16#PBF uniquely combines 2.5Msps speed, 16-bit no-missing-codes integrity, pin-selectable analog input topologies, and an integrated 4.096V reference - reducing total solution size and calibration effort in multi-sensor industrial and medical systems.
Availability
LTC2389IUK-16#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, industrial process control modules, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2389IUK-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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2389-16 product line was designed for high-speed, high-accuracy data acquisition systems demanding low latency, flexible analog interfacing, and robust operation across industrial temperature ranges.
FAQ
What is the maximum sampling frequency of the LTC2389IUK-16#PBF?
The LTC2389IUK-16#PBF achieves a maximum sampling frequency of 2.5Msps in parallel output modes. In serial output mode, the maximum rate is 2.0Msps due to SCK timing constraints. This is specified across the full –40°C to +85°C operating temperature range and confirmed by tCYC = 400ns minimum between CNVST falling edges.
Does the LTC2389IUK-16#PBF require an external reference?
No, the LTC2389IUK-16#PBF includes a precision internal 4.096V reference with ±20ppm/°C max temperature coefficient and 0.5% initial accuracy. REFIN can accept an external reference if higher accuracy or different voltage is needed, but it is not required for standard operation of the LTC2389IUK-16#PBF.
How does the LTC2389IUK-16#PBF support different analog input configurations?
The LTC2389IUK-16#PBF uses the OB/2C and PD/FD pins to configure three analog input modes: fully differential (±4.096V), pseudo-differential unipolar (0–4.096V), and pseudo-differential bipolar (±2.048V). These settings also determine output coding (offset binary or two's complement), all without external components - a key feature of the LTC2389IUK-16#PBF.
What is the power consumption of the LTC2389IUK-16#PBF at full speed?
At 2.5Msps, the LTC2389IUK-16#PBF dissipates 162.5mW (typical), calculated from IVDD = 34.1mA and IOVDD = 1.6mA at VDD = 5V and OVDD = 5V. In nap mode (PD = OVDD), total supply current drops to ≤250µA, reducing power to under 1.25mW - a critical advantage for intermittent-sampling applications using the LTC2389IUK-16#PBF.
Is the LTC2389IUK-16#PBF pin-compatible with other devices in the LTC2389 family?
The LTC2389IUK-16#PBF shares the same 48-pin QFN (UK) package and core pinout with other LTC2389-16 variants (e.g., LTC2389CUK-16#PBF, LTC2389HUK-16#PBF), differing only in temperature grade and marking. However, it is not pin-compatible with 18-bit versions (e.g., LTC2389-18) due to reserved pins (MODE1, A0) being functional in those variants - a distinction confirmed in the LTC2389IUK-16#PBF datasheet.
LTC2389IUK-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2.5M
- Number of Inputs:
- 1
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- SPI, Parallel
- 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:
- Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2389IUK-16#PBF FAQ
1.How can I place an order for LTC2389IUK-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2389IUK-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 LTC2389IUK-16#PBF reliable?
The price and inventory of LTC2389IUK-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 LTC2389IUK-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2389IUK-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2389IUK-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2389IUK-16#PBF?
LTC2389IUK-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2389IUK-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 LTC2389IUK-16#PBF?
For technical support, including LTC2389IUK-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2389IUK-16#PBF requirements.
6.How does Aetrix verify that LTC2389IUK-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2389IUK-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 LTC2389IUK-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2389IUK-16#PBF?
All LTC2389IUK-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2389IUK-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 LTC2389IUK-16#PBF part is unused and in its original packaging.
Return procedure for LTC2389IUK-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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