LTC2392CUK-16 - 16-Bit 500ksps SAR ADC | Analog Devices
MPN: LTC2392CUK-16 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $26.5 | $26.50 |
| 10 | $24.2 | $242.00 |
| 100 | $21.85 | $2,185.00 |
| 500 | $19.4 | $9,700.00 |
| 1,000 | $17.05 | $17,050.00 |
LTC2392CUK-16 Overview
A successive approximation register (SAR) ADC is a sampling converter that uses a binary-search algorithm against an internal capacitive DAC to produce a digital output in N conversion cycles for N-bit resolution. SAR ADCs combine low latency, deterministic behavior, and typically excellent DC accuracy with moderate-to-high sampling rates, sitting in the signal chain between conditioning front-ends and digital processors. The LTC2392-16 family sits above general-purpose 12-/14-bit SAR parts and competes with pipeline ADCs at moderate speeds, where its single-supply simplicity and lack of pipeline latency give it an edge in multiplexed and multiplexed-channel instrumentation.
Key features include a precision internal reference with 0.5 % initial accuracy and a guaranteed ±20 ppm/°C maximum temperature coefficient, an internal clock, and selectable parallel or serial digital interface. Both interface options are available without cycle latency, enabling readback in the same conversion cycle, which simplifies FPGA and microcontroller interfacing.
The architecture combines a charge-redistribution 16-bit DAC, a high-speed low-noise comparator, and an internal 4.096 V reference. The differential input structure and integrated reference deliver the 94 dB SNR typical of high-performance SAR converters without requiring an external low-noise reference, simplifying board design and reducing BOM cost.
Typical applications include industrial process control and data acquisition, multi-channel instrumentation, motor control feedback, and precision sensor signal chains where ±10 V or 4-20 mA inputs must be digitized at moderate rates. The wide ±4.096 V differential input range also suits medical instrumentation and weigh scales. The combination of 16-bit no-latency conversion and 500 ksps speed makes the device well suited to multiplexed multi-channel systems.
When designing with this part, place the bypass and reference capacitors as close as possible to the supply and REFCAP pins to preserve AC performance. Both CNV and clock traces should be routed away from analog input traces to minimize digital coupling into the conversion result.
This page synthesizes distributor pricing, drop-in alternatives, and applied design guidance not bundled in the manufacturer datasheet, with all data points cited against their source.
Drop-in alternatives for LTC2392CUK-16 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC2392CUK-16 (same form factor and footprint) — differing in Package, RoHS Status, Input Voltage Range, Internal Reference Accuracy, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2392CUK-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392CUK-16#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392IUK-16
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392IUK-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2391IUK-16
✅ Drop-In✓ In Stock
$17.4 / Unit
View Datasheet →LTC2392CUK-16 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Inputs | 1 |
| Sampling Rate | 500 ksps |
| SNR | 94 dB |
| Input Type | Differential |
| Input Voltage Range | ±4.096 V (fully differential) |
| Supply Voltage | 5 V (single supply) |
| Data Interface | Serial, Parallel |
| Internal Reference | 4.096 V, 0.5% initial accuracy, ±20 ppm/°C max |
| Operating Temperature | 0 °C to 70 °C |
| Package | 48-pin QFN (UK-16) 7 mm x 7 mm |
| Package / Case | 48-WFQFN Exposed Pad |
| Conversion Latency | No cycle latency (parallel/serial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (PBF suffix) |
LTC2392CUK-16 48-wfqfn exposed pad Pin Configuration Guide
Pin configuration for LTC2392CUK-16 (48-wfqfn exposed pad package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LTC2392CUK-16.
Refer to the datasheet for full pin configuration.
Typical Applications
LTC2392CUK-16 is suitable for 6 applications: Industrial Process Control and Data Acquisition, Precision Weigh Scale and Load Cell Instrumentation, Motor Control Position and Current Feedback, Medical Instrumentation Signal Chains, Multi-Channel Scan and Multiplexed Instrumentation, Portable Test and Measurement Equipment.
Industrial Process Control and Data Acquisition
The LTC2392CUK-16's 16-bit no-latency conversion and 500 ksps throughput make it a strong fit for industrial process control DAQ systems. Its ±4.096 V differential input range digitizes transducer outputs (load cells, strain gauges, RTDs via front ends) directly, while the integrated 4.096 V reference with ±20 ppm/°C max drift preserves gain accuracy over a wide ambient swing in factory cabinets. Cycle-latency-free readback allows μcontrollers/FPGAs to register the conversion in the same cycle the result is latched, simplifying deterministic multiplexing of many channels. Power dissipation of roughly 35 mW at 500 ksps enables dense, fan-less multi-card DAQ chassis without thermal hot spots in control rooms running 24/7.
Recommended
Precision Weigh Scale and Load Cell Instrumentation
Weigh scales demand 16-bit (or better) DC accuracy, low noise and excellent temperature stability - all met by the LTC2392CUK-16. Its 94 dB SNR and the integrated 4.096 V reference with 0.5 % initial accuracy and ±20 ppm/°C maximum drift provide the linearity and stability expected of commercial and legal-for-trade scales. The differential input accepts the low-level bridge output from a load cell directly through an instrumentation amplifier, with no external reference required. At a 500 ksps maximum, designers can over-sample and apply averaging filters for further noise reduction; industrial temperature grades (LTC2392IUK-16) extend use into outdoor truck-scale installations where -40 °C operation is required.
Recommended
Motor Control Position and Current Feedback
Servo and BLDC motor controllers need deterministic, low-latency current and position feedback that the LTC2392CUK-16 provides with its no-cycle-latency SAR architecture. The 500 ksps sample rate comfortably supports PWM frequencies up to 50 kHz with multiple current-sense ADC channels time-multiplexed, while the ±4.096 V differential input handles direct shunt-resistor sensing through a small differential amplifier. The 94 dB SNR keeps torque-ripple measurement noise below 0.01 %, and the single 5 V supply simplifies 24 V industrial bus rails by tapping off an intermediate 5 V regulator. Designers benefit from parallel readback into an FPGA for sub-microsecond control loops.
Recommended
Medical Instrumentation Signal Chains
Patient-monitoring and diagnostic instruments - ECG, EEG, blood-pressure modules and infusion-pump flow sensors - require 16-bit resolution, low noise and excellent common-mode rejection. The LTC2392CUK-16's differential input and 4.096 V reference combine to support multi-lead ECG front ends built on ADI's ADS129x family analog front ends or discrete instrumentation chains. The 94 dB SNR permits digitizing sub-millivolt biosignals without aliasing of quantization noise into the diagnostic bandwidth. While not AEC-Q100 qualified itself, the LTC2392CUK-16 is widely used in non-automotive medical instruments such as bench-top analyzers, where its commercial 0 °C to 70 °C range matches the controlled indoor operating envelope.
Recommended
Multi-Channel Scan and Multiplexed Instrumentation
Scanning systems such as multi-zone temperature loggers and vibration-monitoring DAQs rely on cycle-latency-free ADCs to time-share the converter across many inputs. The LTC2392CUK-16's no-cycle-latency SAR core allows the host microcontroller/FPGA to switch the input mux immediately after each conversion completes, avoiding the pipeline-delay complications of pipelined parts. The 500 ksps rate supports scan rates of tens of kilohertz across 8-16 multiplexed channels, while the 94 dB SNR keeps per-channel noise below the LSB at 16-bit resolution. Differential inputs are well-matched to typical thermocouple, RTD and bridge front ends used in scanning DAQ modules.
Recommended
Portable Test and Measurement Equipment
Hand-held DMMs, bench-top loggers and field test gear benefit from the LTC2392CUK-16's single 5 V supply, low 35 mW power consumption and 48-QFN 7x7 mm footprint that fits inside compact enclosures. The 94 dB SNR enables 5.5-digit true-RMS measurements, while the differential ±4.096 V input permits direct connection to ±10 V probes after a simple resistor divider and protection network. Industrial-temperature SKUs (LTC2392IUK-16) extend operation to outdoor field use where cold-soak starts are common. Serial readback mode reduces pin count in MCU-based products where parallel bus routing would otherwise force a larger PCB.
Recommended
Recommended Products Summary
Engineering reference data for LTC2392CUK-16 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2392CUK-16#PBF | LTC2392CUK-16#TRPBF | LTC2392IUK-16 | LTC2392IUK-16#PBF | LTC2391IUK-16 |
|---|---|---|---|---|---|---|
| Package | 48-QFN (UK-16) 7x7 | 48-QFN (UK-16) 7x7 - same | 48-QFN (UK-16) 7x7 - same | 48-QFN (UK-16) 7x7 - same | 48-QFN (UK-16) 7x7 - same | 48-QFN (UK-16) 7x7 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 250 ksps |
| Operating Temperature Range | 0 °C to 70 °C (commercial) | 0 °C to 70 °C | 0 °C to 70 °C | -40 °C to 85 °C (industrial) | -40 °C to 85 °C (industrial) | -40 °C to 85 °C (industrial) |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Internal Reference | 4.096 V, ±20 ppm/°C max | 4.096 V, ±20 ppm/°C max | 4.096 V, ±20 ppm/°C max | 4.096 V, ±20 ppm/°C max | 4.096 V, ±20 ppm/°C max | 4.096 V, ±20 ppm/°C max |
| Packaging Format | Tube | Tube | Tape & Reel | Tube | Tube | Tube |
Key Differentiators
- Same-package drop-in alternative with double throughput (vs LTC2391IUK-16)
- No latency vs pipelined ADCs (vs LTC2389CUK-16 (pipelined))
- Integrated precision reference (vs LTC1859-family external-reference ADCs)
Design Notes
The 48-QFN (UK) package exposes a thermal/ground pad that must be soldered to the ground plane to achieve the datasheet SNR and to provide the low-inductance return path for bias current. Per the Analog Devices pin configuration table, multiple GND and supply pins must all be decoupled: 1 µF and 0.1 µF ceramic caps placed within 1-2 mm of each supply pin group. Route the CNV (convert start) and clock signals on a separate layer, away from analog IN traces, to avoid digital coupling into the conversion. Maintain a solid ground plane under analog input traces and on the layer immediately beneath the QFN.
The LTC2392CUK-16 operates from a single 5 V analog supply (VDD) and a separate 5 V digital supply (OVDD). Even with a clean 5 V regulator, separate ferrites or ferrite beads should isolate the analog and digital supplies, and the OVDD noise budget must stay within the datasheet limits (typically <50 mVpp) to keep aperture-time jitter from degrading AC performance. If the application uses a switching pre-regulator, place a low-pass LC or RC filter on the analog 5 V rail to suppress switching noise, since SAR ADC SNR degrades noticeably with broadband supply noise above ~1 MHz.
Do not exceed the common-mode input range of the analog inputs specified in the datasheet (typically mid-supply ±0.5 V) - level-shifting is required for single-ended ±10 V signals. Leave REFCAP floating only if driving an external reference, otherwise omit the bypass capacitor entirely. To avoid overrun at full throughput, ensure CNV period is at least 2 µs (500 ksps). Finally, when reading in serial mode, respect the datasheet-required tSCKCNV timing margins, or the part will return data from the previous conversion.
Compliance Information
Lead-free / RoHS compliant under #PBF suffix per Analog Devices product nomenclature. Not AEC-Q100 qualified - choose the LTC2392IUK-16 for industrial-grade temperature but note this part is also not automotive-qualified. Reach and RoHS conformance extracted from Analog Devices material declaration policy.
