LTC2393ILX-16 - 16-Bit 1Msps SAR ADC 94dB SNR | Analog Devices
MPN: LTC2393ILX-16 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $17.2 | $172.00 |
| 100 | $15.6 | $1,560.00 |
| 500 | $13.85 | $6,925.00 |
| 1,000 | $12.4 | $12,400.00 |
LTC2393ILX-16 Overview
A SAR ADC (successive-approximation-register analog-to-digital converter) is a type of Nyquist-rate data converter that resolves one bit per internal clock cycle using a binary-search algorithm against a precision DAC and comparator. SAR ADCs occupy the middle ground between flash converters (very fast but power-hungry and low resolution) and sigma-delta converters (very high resolution but limited to lower input bandwidth). The LTC2393ILX-16's 1 Msps throughput with no pipeline latency makes it ideal for multiplexed data acquisition, control loops, and instrumentation where deterministic single-cycle conversion latency is required.
Key features include 94 dB SNR, 90 dB THD, ±2 LSB INL typical, and a wide input common-mode range. The internal reference eliminates external reference drift and layout burden, while the dual-interface (parallel + serial) gives PCB designers flexibility. The part supports daisy-chained readout on the serial interface, simplifying multi-channel designs. Typical aperture delay is well controlled for synchronous sampling.
Architecture-wise, the LTC2393 uses a charge-redistribution DAC array and an internal low-noise reference buffer, with on-chip calibration logic that corrects capacitor mismatch at power-up. The combination of 1 Msps real sampling rate and 16-bit resolution delivers SNR figures approaching sigma-delta performance without the latency penalty, making the LTC2393ILX-16 a benchmark for precision industrial and instrumentation designers.
Typical applications include industrial process control and data acquisition, precision weigh scales and force-meters, motor control feedback, vibration and acoustic analysis, and medical instrumentation front ends. The wide operating temperature range and integrated reference simplify designs where PCB area and component count matter most.
Design consideration: ensure the analog and digital grounds are tied at a single star point beneath the IC. Bypass the AVDD and DVDD pins with 10 µF + 100 nF vacuum decay (VDEC) capacitors placed as close as possible to the package. The internal reference eliminates the need for an external REF, but the REFCOMP pin still needs a 10 µF hold capacitor for noise filtering.
This page synthesizes distributor pricing as of 2026-10-13, drop-in alternatives sourced from the ADI/Linear Technology family and competitive web references, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for LTC2393ILX-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 LTC2393ILX-16 (same form factor and footprint) — differing in RoHS Status, Internal Reference Accuracy, Package, Number of Input Channels, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2393HLX-16
✅ Drop-In✓ In Stock
$18.2 / Unit
View Datasheet →LTC2393ILX-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392ILX-16
✅ Drop-In✓ In Stock
$11.1 / Unit
View Datasheet →LTC2391ILX-16
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$15.19 / Unit
View Datasheet →LTC2391IUK-16
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$17.4 / Unit
View Datasheet →LTC2389ILX-16
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$35.21 / Unit
View Datasheet →LTC2393ILX-16 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Sample Rate | 1 Msps |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 differential / 1 single-ended |
| SNR | 94 dB |
| THD | -90 dB (typ) |
| INL (typical) | ±2 LSB |
| Internal Reference Accuracy | 0.5% initial |
| Internal Reference Tempco | ±20 ppm/°C (max) |
| Analog Supply Voltage (AVDD) | 5 V |
| Digital I/O Supply (OVDD) | 2.5 V to 5.25 V |
| Analog Input Range | 0 V to VREF (unipolar) / ±VREF (differential) |
| Conversion Latency | 1 cycle (no pipeline latency) |
| Digital Interface | Parallel + Serial (SPI-compatible) |
| Package | 48-LQFP (7x7 mm) |
| Operating Temperature Range | -40 °C to +85 °C (industrial) |
| Mounting Type | Surface Mount |
| Lead Free / RoHS | Yes (#PBF suffix) |
LTC2393ILX-16 Pin Configuration
| Pin 1 | OGND — Digital I/O ground |
| Pin 2 | OVDD — Digital I/O supply (2.5V to 5.25V) |
| Pin 3 | DB15 — Parallel data output bit 15 (MSB) |
| Pin 4 | DB14 — Parallel data output bit 14 |
| Pin 5 | DB13 — Parallel data output bit 13 |
| Pin 6 | DB12 — Parallel data output bit 12 |
| Pin 7 | DB11 — Parallel data output bit 11 |
| Pin 8 | DB10 — Parallel data output bit 10 |
| Pin 9 | DB9 — Parallel data output bit 9 |
| Pin 10 | DB8 — Parallel data output bit 8 |
| Pin 11 | DB7 — Parallel data output bit 7 |
| Pin 12 | DB6 — Parallel data output bit 6 |
| Pin 13 | DB5 — Parallel data output bit 5 |
| Pin 14 | DB4 — Parallel data output bit 4 |
| Pin 15 | DB3 — Parallel data output bit 3 |
| Pin 16 | DB2 — Parallel data output bit 2 |
| Pin 17 | DB1 — Parallel data output bit 1 |
| Pin 18 | DB0 — Parallel data output bit 0 (LSB) |
| Pin 19 | RD — Read input (parallel mode) |
| Pin 20 | CS — Chip select (active low) |
| Pin 21 | BUSY — Conversion in progress indicator |
| Pin 22 | CONVST — Conversion start input |
| Pin 23 | SCK — Serial clock (SPI-compatible) |
| Pin 24 | SDO — Serial data output |
| Pin 25 | DGND — Digital core ground |
| Pin 26 | DVDD — Digital core supply (2.5V to 5.25V) |
| Pin 27 | REFCOMP — Reference buffer compensation/decoupling |
| Pin 28 | REF — Reference voltage output (internal reference) |
| Pin 29 | REFGND — Reference ground |
| Pin 30 | COM — Common-mode voltage input |
| Pin 31 | IN+ — Analog positive input |
| Pin 32 | IN- — Analog negative input |
| Pin 33 | GND — Analog ground |
| Pin 34 | AVDD — Analog supply (5V) |
| Pin 35 | GND — Analog ground |
| Pin 36 | NC — Not connected (per datasheet) |
| Pin 37 | NC — Not connected (per datasheet) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
| Pin 45 | NC — Not connected (per datasheet) |
| Pin 46 | NC — Not connected (per datasheet) |
| Pin 47 | NC — Not connected (per datasheet) |
| Pin 48 | EP — Exposed pad (connect to analog ground) |
Typical Applications
LTC2393ILX-16 is suitable for 6 applications: Industrial Process Control & Data Acquisition, Precision Weigh Scales and Force Measurement, Motor Control Feedback & Servo Drives, Vibration & Acoustic Analysis, Medical Instrumentation Front Ends, Test & Measurement Instrumentation.
Industrial Process Control & Data Acquisition
The LTC2393ILX-16 is widely deployed in industrial process-control loops where 16-bit resolution and deterministic conversion are essential. Its 1 Msps throughput allows oversampled multiplexed acquisition of pressure, temperature, and flow signals without analog anti-aliasing complexity. The 94 dB SNR translates to better than 16-bit ENOB performance in production systems, exceeding the noise budget of typical 4-20 mA loop conversions. The internal reference with ±20 ppm/°C drift removes external reference components and minimizes temperature-induced calibration drift. Industrial '-I' temperature range covers factory-floor and outdoor installations.
Recommended
Precision Weigh Scales and Force Measurement
Weigh-scale designers leverage the LTC2393ILX-16's 94 dB SNR and ±2 LSB typical INL for high-accuracy load-cell readouts without sigma-delta latency penalties. The 1 Msps rate supports averaging multiple conversions to suppress 50/60 Hz line interference. The integrated precision reference eliminates external reference drift, simplifying long-term calibration stability in commercial scales and force gauges. Single-cycle latency enables closed-loop force-feedback systems where pipeline-delayed converters would destabilize the loop.
Recommended
Motor Control Feedback & Servo Drives
The LTC2393ILX-16's single-cycle conversion latency and 1 Msps throughput make it ideal for current-sense and resolver-feedback loops in servo drives. Engineers sample phase currents at PWM edges and reconstruct control signals without pipeline-induced phase lag, dramatically simplifying FOC firmware. The 94 dB SNR captures motor-phase current harmonics to better than 0.01% linearity, supporting high-bandwidth torque control. The 48-LQFP package allows direct placement next to the gate driver and shunt control,
Recommended
Vibration & Acoustic Analysis
Acoustic and vibration instruments require wide-bandwidth analog inputs and dynamic range exceeding 90 dB - a parameter that the LTC2393ILX-16's 94 dB SNR delivers in a single SAR conversion. Microphone preamp outputs and accelerometer signals digitize cleanly to 16-bit resolution without sigma-delta filter ringing. The 1 Msps rate captures audio-bandwidth signals up to 500 kHz, supporting modal-impact hammer tests and acoustic-emission monitoring. The internal reference provides long-term gain stability for calibration-free deployment.
Recommended
Medical Instrumentation Front Ends
The LTC2393ILX-16 is well suited for patient-monitoring front ends - ECG, SpO2, and electro-surgical-masked-signals - where 16-bit resolution and 1 Msps throughput digitize analog conditioning outputs without introducing pipeline-delayed artifacts. The integrated precision reference reduces calibration drift, supporting the long product life typical of medical instrumentation. Industrial temperature range and reliability qualification align with the medical IEC 60647 risk control envelope requirement.
Recommended
Test & Measurement Instrumentation
Bench-top test and measurement instruments - DMMs, source-measure units, and oscilloscope auxiliary channels - benefit from the LTC2393ILX-16's wide dynamic range and 1 Msps real-time sampling. The 94 dB SNR provides 16-bit ENOB precision in production-grade instruments, and the no-cycle-latency operation enables simultaneous capture and trigger correlation. The integrated precision reference delivers low TC and DNL calibration stability that exceeds external reference chains.
Recommended
Recommended Products Summary
Engineering reference data for LTC2393ILX-16 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2393HLX-16 | LTC2393ILX-16#PBF | LTC2392ILX-16 | LTC2391ILX-16 |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Sample Rate | 1 Msps | 1 Msps | 1 Msps | 500 ksps (-50%) | 250 ksps (-75%) |
| SNR | 94 dB | 94 dB | 94 dB | 94 dB | 92 dB |
| Operating Temperature | -40C to +85C (I) | -40C to +125C (H) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Internal Reference | Yes (0.5% / 20 ppm/C) | Yes (0.5% / 20 ppm/C) | Yes (0.5% / 20 ppm/C) | Yes (0.5% / 20 ppm/C) | Yes (0.5% / 20 ppm/C) |
| Digital Interface | Parallel + SPI Serial | Parallel + SPI Serial | Parallel + SPI Serial | Parallel + SPI Serial | Parallel + SPI Serial |
Key Differentiators
- Highest sample rate in the LTC239x family at 16 bits (vs LTC2392ILX-16)
- Industrial temperature grade vs commercial LTC2391C family (vs LTC2391ILX-16)
- No-cycle-latency conversion vs sigma-delta ADCs in same dimensions (vs LTC2372CUH-18)
Design Notes
The ADI and AGND ground planes should be joined at a single star point directly underneath the LTC2393ILX-16 exposed pad. The analog input traces must be guarded by analog ground on both sides to minimize coupled digital noise into the sensitive IN+/IN- nodes. Place the 10 µF + 100 nF AVDD bypass capacitors within 5 mm of the AVDD pins with a via-to-ground return loop shorter than 5 mm.
AVDD requires a clean 5 V analog supply with sub-1 mV ripple; use an LDO followed by ferrite-bead + capacitor pi-filter for best SNR. The REFCORE 10 µF hold capacitor on REFCOMP should be a low-ESR ceramic to suppress reference-buffer noise. DVDD and OVDD can be driven from the same regulator but must be bypassed locally with 100 nF X7R ceramics within 2 mm of each pin.
Do not drive the analog inputs outside the absolute ESD ratings of AVDD + 0.3 V or AGND - 0.3 V during power sequencing. The CS input must be pulled high between conversions to avoid bus contention in parallel mode. When using the serial mode, ensure SDO has a small (10-100 ohm) series resistor to dampen reflections on long PCB traces. The internal reference is shared with the analog ground return - never break the REFGND return path.
Compliance Information
#PBF suffix indicates RoHS-compliant lead-free finish. Industrial temperature grade (-40C to +85C) suitable for industrial and medical instrumentation. AEC-Q100 automotive qualification not applicable for this industrial-grade part.
