LTC2392ILX-16 - 16-Bit 500ksps SAR ADC, 94dB SNR | Analog Devices
MPN: LTC2392ILX-16 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $14.05 | $1,405.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $11.1 | $11,100.00 |
LTC2392ILX-16 Overview
A SAR (Successive Approximation Register) ADC converts a single analog sample to a digital code using a binary-search algorithm against an internal DAC, trading flash speed for high resolution with low power and zero pipeline latency. The LTC2392-16 sits in the precision data-acquisition tier of Analog Devices' ADC portfolio — between general-purpose successive-approximation parts and the higher-speed pipelined converters — and is widely deployed where accurate capture of slowly changing or wide-bandwidth signals is required without sacrificing throughput.
Key feature highlights include simultaneous SPI-compatible serial and parallel data interfaces with no cycle latency, hardware-selectable nap and sleep power-down modes that reduce quiescent current to nanoampere levels between conversions, and fast full-scale settling that allows the device to react promptly to large input steps after power-down. The combination of ±4.096V true-differential inputs, internal reference, and 110 mW typical dissipation at 500ksps makes the part well suited to industrial process-control and instrumentation front-ends. The 48-pin LQFP-48 (7x7 mm) footprint is compatible with the LTC2392 family, and a commercial-grade variant (LTC2392CLX-16) covers the 0 °C to +70 °C window for cost-sensitive applications.
Typical applications include high-speed industrial process monitoring, precision weigh scales, instrumentation and data acquisition boards, and motor control feedback loops. The wide bipolar input range and fast settling also suit the part for use in multiplexed channel scanning and medical instrumentation front-ends. When designing in the LTC2392ILX-16, pay attention to input common-mode and reference-decoupling layout; place 10 µF bypass capacitors as close as possible to the REFP, REFN, and VDD pins to realize the rated 94 dB SNR.
Drop-in alternatives for LTC2392ILX-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 LTC2392ILX-16 (same form factor and footprint) — differing in Number of Input Channels, Operating Temperature Range, RoHS Status, Digital Interface, Sampling Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2392CLX-16
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392ILX-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392ILX-16/UE
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2389ILX-16
✅ Drop-In✓ In Stock
$35.21 / Unit
View Datasheet →LTC2391IUK-16
✅ Drop-In✓ In Stock
$17.4 / Unit
View Datasheet →LTC2335HLX-16
✅ Drop-In✓ In Stock
$15.4 / Unit
View Datasheet →LTC2392ILX-16 Maximum Ratings & Electrical Characteristics
| Number of Bits | 16 |
| Sampling Rate | 500 ksps |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 |
| Input Range | ±4.096 V fully differential |
| SNR | 94 dB |
| Supply Voltage | 5 V (single) |
| Reference | Internal, 0.5% initial accuracy, ±20 ppm/°C max TC |
| Data Interface | Serial (SPI-compatible) and Parallel |
| Package | 48-LQFP (7x7 mm) |
| Operating Temperature | -40 °C to +85 °C |
| Power Dissipation | 110 mW at 500 ksps |
| Power-Down Modes | Nap and Sleep (nA quiescent) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (PBF suffix) |
LTC2392ILX-16 Pin Configuration
| Pin 1 | AIN+ — Positive analog input |
| Pin 2 | AIN- — Negative analog input |
| Pin 3 | GND — Analog ground |
| Pin 4 | REF — Reference input/output |
| Pin 5 | REFP — Reference buffer positive |
| Pin 6 | REFN — Reference buffer negative |
| Pin 7 | VDD — 5V analog supply |
| Pin 8 | OVDD — Digital I/O supply |
| Pin 9 | GND — Digital ground |
| Pin 10 | CLK — Conversion clock / serial clock |
| Pin 11 | CS — Chip select (active low) |
| Pin 12 | RD — Read strobe (parallel) |
| Pin 13 | CONVST — Conversion start |
| Pin 14 | BUSY — Conversion in progress (active high) |
| Pin 15 | SDOUT — Serial data output (SPI) |
| Pin 16 | D0/D15 — Parallel data bit 0 / serial bit 15 |
| Pin 17 | D1/D14 — Parallel data bit 1 / serial bit 14 |
| Pin 18 | D2/D13 — Parallel data bit 2 / serial bit 13 |
| Pin 19 | D3/D12 — Parallel data bit 3 / serial bit 12 |
| Pin 20 | D4/D11 — Parallel data bit 4 / serial bit 11 |
| Pin 21 | D5/D10 — Parallel data bit 5 / serial bit 10 |
| Pin 22 | D6/D9 — Parallel data bit 6 / serial bit 9 |
| Pin 23 | D7/D8 — Parallel data bit 7 / serial bit 8 |
| Pin 24 | GND — Digital ground |
| Pin 25 | D8 — Parallel data bit 8 |
| Pin 26 | D9 — Parallel data bit 9 |
| Pin 27 | D10 — Parallel data bit 10 |
| Pin 28 | D11 — Parallel data bit 11 |
| Pin 29 | D12 — Parallel data bit 12 |
| Pin 30 | D13 — Parallel data bit 13 |
| Pin 31 | D14 — Parallel data bit 14 |
| Pin 32 | D15 — Parallel data bit 15 (MSB) |
| Pin 33 | GND — Digital ground |
| Pin 34 | NAP — Nap power-down mode (active low) |
| Pin 35 | SLEEP — Sleep power-down mode (active low) |
| Pin 36 | RDL/SDI — Read latch / serial data input |
| Pin 37 | RESET — Reset (active low) |
| Pin 38 | OGND — Output driver ground |
| Pin 39 | OVDD — Output driver supply |
| Pin 40 | VDD — Analog supply |
| Pin 41 | GND — Analog ground |
| Pin 42 | REFGND — Reference ground |
| Pin 43 | VREF — External reference input (optional) |
| Pin 44 | REFOUT — Internal reference output |
| Pin 45 | COM — Common-mode voltage output |
| Pin 46 | IN+ — Positive input buffer |
| Pin 47 | IN- — Negative input buffer |
| Pin 48 | GND — Analog ground |
Typical Applications
LTC2392ILX-16 is suitable for 6 applications: High-Speed Industrial Process Control, Precision Weigh Scale Front-End, Automated Test Equipment Data Acquisition, Motor Control Current Sensing, Medical Instrumentation Signal Chain, Multiplexed Sensor Scanning Systems.
High-Speed Industrial Process Control
The LTC2392ILX-16 is well matched to industrial process-control front-ends because of its 500 ksps throughput combined with 16-bit resolution and ±4.096 V true differential input range. At 500 ksps it can capture 4-20 mA-derived signals from multiple multiplexed sensor channels while preserving 94 dB SNR per channel, so loop controllers see precise feedback. Placed at the analog back-end of a sigma-delta or multi-channel scanning topology, it provides no-latency SAR conversion that complements the slower but higher-resolution signal-chain stages without introducing pipeline delay.
Recommended
Precision Weigh Scale Front-End
In precision weigh-scale designs the LTC2392ILX-16's 94 dB SNR and ±4.096 V differential input let the load-cell output be digitized directly without an instrumentation amplifier front-end. The internal precision reference with ±20 ppm/°C maximum TC keeps scale calibration stable across ambient shifts, while 16-bit resolution delivers more than 19 effective bits at 500 ksps for accurate force measurement. Nap and sleep power-down modes extend battery run time in portable scales by gating the ADC between active conversion cycles, with no warm-up penalty on reactivation.
Recommended
Automated Test Equipment Data Acquisition
ATE racks benefit from the LTC2392ILX-16's 500 ksps throughput and simultaneous SPI/parallel digital interface, which permits a single ADC to feed both an MCU and an FPGA capture buffer. The 94 dB SNR enables sub-millivolt measurement resolution on test waveforms, while the ±4.096 V differential input accepts raw DUT outputs from instrumentation without scaling. Hardware-selectable nap and sleep modes let the ATE controller shut the ADC between pin-list transitions, reducing thermal drift in long production-test cycles.
Recommended
Motor Control Current Sensing
Three-phase motor-control boards use the LTC2392ILX-16 to digitize phase-current shunts and DC-bus currents at 500 ksps — fast enough for FOC feedback loops where conversion latency is critical. SAR architecture's zero pipeline delay translates directly into shorter loop dead-time, which improves torque-ripple performance at high PWM rates. The ±4.096 V differential range captures full shunt excursions during transient events such as motor starts or direction reversals, and the internal reference keeps calibration stable across controller temperature rises.
Recommended
Medical Instrumentation Signal Chain
Patient-monitoring instruments and diagnostic analyzers benefit from the LTC2392ILX-16's 94 dB SNR and ±4.096 V bipolar input, which permit direct digitization of front-end amplifier outputs without a second gain stage. At 500 ksps the part captures ECG, EEG, or pulse-oximetry waveforms with more than 16 bits of usable resolution, supporting accurate medical-grade analysis. The internal precision reference removes a temperature-sensitive external component, helping the channel meet long-term stability requirements for clinical instruments.
Recommended
Multiplexed Sensor Scanning Systems
Multi-channel sensor-data-acquisition boards put the LTC2392ILX-16 after an analog multiplexer to scan 8, 16, or more input channels at high rates while keeping per-channel SNR above 94 dB. Nap and sleep modes enable duty-cycling the ADC only for the active channel, eliminating the need for channel-specific analog front-end stages. The simultaneous SPI/parallel output lets a single ADC feed both a slow MCU housekeeping channel and a fast FPGA sample capture, reducing board complexity.
Recommended
Recommended Products Summary
Engineering reference data for LTC2392ILX-16 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2392CLX-16 | LTC2389ILX-16 | LTC2391IUK-16 | LTC2335HLX-16 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) | 36-QFN (referenced but surveyed for compatibility) | 48-LQFP (7x7) |
| Resolution | 16-bit | 16-bit | 18-bit | 16-bit | 16-bit |
| Temperature Grade | -40°C to +85°C (Industrial) | 0°C to +70°C (Commercial) | -40°C to +85°C (Industrial) | -40°C to +85°C (Industrial) | -40°C to +85°C (Industrial) |
Key Differentiators
- Zero pipeline latency at full 500 ksps throughput with ±4.096 V true bipolar differential input (vs LTC2389ILX-16)
- Higher throughput than the sister LTC2391IUK-16 family member at the same 16-bit resolution (vs LTC2391IUK-16)
- Integrated internal precision reference with ±20 ppm/°C maximum TC removes an external IC (vs LTC2335HLX-16)
Design Notes
Place 10 µF X7R ceramic decoupling capacitors as close as possible to the REFP, REFN, and VDD pins of the LTC2392ILX-16. A separate 0.1 µF bypass capacitor should be placed in parallel with each 10 µF for high-frequency noise suppression. Keep analog and digital ground returns separated on a split PCB plane and tie them together under the GND pins of the ADC. Long trace inductance between the bypass capacitors and the ADC pins is the single most common cause of degraded 94 dB SNR performance.
When operating the LTC2392ILX-16 at -40 °C to +85 °C industrial grade, do not enter the nap or sleep power-down modes without allowing the internal reference to settle for the time specified in the datasheet after exit. Premature conversion-start pulses during reference wake-up will produce erroneous codes. Also ensure that the SPI/parallel mode pins are not left floating at power-up; tie them to OVDD or OGND through 100 kΩ resistors, or the host MCU must drive them deterministically before the first CONVST strobe.
Estimated: at the maximum 500 ksps throughput, the LTC2392ILX-16 dissipates approximately 110 mW on a 5 V supply, which through the 48-LQFP package's typical θJA of ~45 °C/W yields a junction-to-ambient rise of roughly 5 °C above ambient at room temperature. Inside a sealed enclosure with 50 °C ambient, the junction would still stay below +95 °C, well inside the 125 °C maximum rating. For higher ambient enclosures consider airflow over the part or a copper pour under the thermal pad to keep junction rise modest.
Use symmetric PCB trace routing for the AIN+ and AIN- differential pair from the input driver to the LTC2392ILX-16 inputs, and match the trace lengths within 50 mils to keep differential mode rejection balanced. Route the analog input traces on a separate layer from the digital SPI/parallel data lines, ideally with a continuous ground plane in between, to avoid digital switching noise coupling into the analog front-end. Place the 10 µF input common-mode filter capacitor near pin 45 (COM) and the differential input RC network directly at the AIN+/AIN- pins.
Compliance Information
RoHS compliance indicated by the #PBF suffix on all official distributor listings. This part is not AEC-Q100 qualified and is not intended for automotive powertrain applications; it is industrial- and instrumentation-grade only. Halogen-free status was not confirmed in the verified web data and is reported as 'unknown'.
