LTC2393CUK-16 - 16-Bit 1Msps SAR ADC 94dB SNR | Analog Devices
MPN: LTC2393CUK-16 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.24 | $16.24 |
| 10 | $14.62 | $146.20 |
| 100 | $12.99 | $1,299.00 |
| 500 | $11.85 | $5,925.00 |
| 1,000 | $10.95 | $10,950.00 |
LTC2393CUK-16 Overview
An SAR ADC is a successive-approximation-register analog-to-digital converter, a class of data converter that uses a binary-search algorithm and an internal capacitive DAC to resolve each sample in a fixed number of clock cycles. In the broader signal-chain hierarchy, SAR ADCs sit between flash converters (faster but lower resolution) and sigma-delta ADCs (higher resolution but slower) and are favored for multiplexed data acquisition, motor control, and instrumentation loops where deterministic latency, moderate resolution, and high throughput are all required.
Key features of the LTC2393CUK-16 include ±5V true bipolar input range with 94dB SNR and 16-bit no-missing-codes, an internal 4.096V reference that can be overdriven by an external reference, and wide 4.5V to 5.5V analog supply operation. The device also offers a flexible digital interface (parallel or serial LVCMOS), a low-drift internal reference, and a per-channel input span of ±VREF centered on common mode.
Architecturally the converter uses a charge-redistribution SAR core that resolves 16 bits in a single conversion cycle, enabling 1Msps throughput with no pipeline delay. The internal reference is a low-noise bandgap with curvature compensation, and the analog input front-end is a true fully-differential switched-capacitor sampler with integrated input transient buffers. This topology makes the part tolerant of source-impedance variation and immune to charge kickback.
Typical applications include high-speed industrial data acquisition, medical imaging front-ends, motor control current sensing, multichannel multiplexed instrumentation, and automated test equipment (ATE) digitizer cards. The wide input range simplifies signal conditioning when interfacing directly to ±10V sensors with external resistor dividers.
When designing with this ADC, place the analog and digital ground planes in a star pattern and decouple the analog supply with a 10uF ceramic plus a 0.1uF capacitor placed within 5mm of the AVdd pin. Source-impedance above 50 ohms will degrade THD, so add a wideband buffer such as the LT6203 directly in front of the inputs.
This page synthesizes distributor pricing, same-family alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate your LTC2393CUK-16 selection and bring-up.
Drop-in alternatives for LTC2393CUK-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 LTC2393CUK-16 (same form factor and footprint) — differing in Package, Resolution, RoHS Status, Input Type, Input Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2393IUK-16
✅ Drop-In✓ In Stock
$10.5 / Unit
View Datasheet →LTC2393CUK-16#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2393CUK-16#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2392CUK-16
✅ Drop-In✓ In Stock
$17.05 / Unit
View Datasheet →LTC2389CUK-16
✅ Drop-In✓ In Stock
$24.96 / Unit
View Datasheet →LTC2389IUK-18
✅ Drop-In✓ In Stock
$45.3 / Unit
View Datasheet →LTC2393CUK-16 Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Inputs | 1 (fully differential) |
| Sample Rate | 1 Msps |
| SNR | 94 dB |
| Input Voltage Range | ±VREF (true bipolar, with ±5V supply) |
| Analog Supply Voltage | 4.5 V to 5.5 V |
| Digital Supply Voltage | 1.71 V to 5.5 V (1.8V/3.3V/5V logic compatible) |
| Internal Reference Voltage | 4.096 V |
| Internal Reference Initial Accuracy | 0.5% (max) |
| Internal Reference Temperature Coefficient | ±20 ppm/°C (max) |
| DNL (Differential Non-Linearity) | 16-bit no-missing-codes |
| Cycle Latency | 0 (no pipeline delay) |
| Digital Interface | Parallel or Serial (SPI-compatible) |
| Operating Temperature | 0°C to +70°C |
| Package | 48-QFN (7x7 mm) - UK |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
LTC2393CUK-16 Pin Configuration
| Pin 1 | IN+ — Positive analog input |
| Pin 2 | IN- — Negative analog input |
| Pin 3 | AGND — Analog ground |
| Pin 4 | REFCOMP — Reference compensation pin |
| Pin 5 | REF — Reference input/output |
| Pin 6 | AGND — Analog ground |
| Pin 7 | AVDD — Analog supply 5V |
| Pin 8 | AGND — Analog ground |
| Pin 9 | AGND — Analog ground |
| Pin 10 | OGND — Output driver ground |
| Pin 11 | OVDD — Output driver supply |
| Pin 12 | D15 — Parallel data bit 15 (MSB) |
| Pin 13 | D14 — Parallel data bit 14 |
| Pin 14 | D13 — Parallel data bit 13 |
| Pin 15 | D12 — Parallel data bit 12 |
| Pin 16 | D11 — Parallel data bit 11 |
| Pin 17 | D10 — Parallel data bit 10 |
| Pin 18 | D9 — Parallel data bit 9 |
| Pin 19 | D8 — Parallel data bit 8 |
| Pin 20 | DGND — Digital ground |
| Pin 21 | OVDD — Output driver supply |
| Pin 22 | D7 — Parallel data bit 7 |
| Pin 23 | D6 — Parallel data bit 6 |
| Pin 24 | D5 — Parallel data bit 5 |
| Pin 25 | D4 — Parallel data bit 4 |
| Pin 26 | D3 — Parallel data bit 3 |
| Pin 27 | D2 — Parallel data bit 2 |
| Pin 28 | D1 — Parallel data bit 1 |
| Pin 29 | D0 — Parallel data bit 0 (LSB) |
| Pin 30 | DGND — Digital ground |
| Pin 31 | BUSY — Conversion in progress indicator |
| Pin 32 | CS — Chip select (active low) |
| Pin 33 | RD — Read strobe (active low) |
| Pin 34 | SCK — Serial clock input |
| Pin 35 | SDO — Serial data output |
| Pin 36 | SER/PAR — Interface mode select |
| Pin 37 | DGND — Digital ground |
| Pin 38 | CNV — Conversion start input |
| Pin 39 | OVDD — Output driver supply |
| Pin 40 | DGND — Digital ground |
| Pin 41 | NC — Not connected |
| Pin 42 | NC — Not connected |
| Pin 43 | NC — Not connected |
| Pin 44 | NC — Not connected |
| Pin 45 | AVDD — Analog supply 5V |
| Pin 46 | AGND — Analog ground (exposed pad) |
| Pin 47 | AGND — Analog ground (exposed pad) |
| Pin 48 | AGND — Analog ground (exposed pad) |
Typical Applications
LTC2393CUK-16 is suitable for 6 applications: Industrial Multichannel Data Acquisition, Medical Imaging Front-Ends, Motor Control Current Sensing, Vibration and Acoustic Analysis, Automated Test Equipment (ATE) Digitizer, Wideband Instrumentation and Oscilloscope Front-End.
Industrial Multichannel Data Acquisition
The LTC2393CUK-16's 1Msps throughput and zero-latency SAR architecture make it ideal for multiplexed industrial data acquisition systems. With 94dB SNR and a true ±5V bipolar input range, it directly digitizes outputs from load cells, strain gauges, and 4-20mA current loops without external level shifting. The 48-QFN (7x7) UK package is footprint-compatible across the LTC239x family, enabling easy speed or resolution migration. Source: Analog Devices LTC2393-16 datasheet application section.
Recommended
Medical Imaging Front-Ends
The 94dB SNR and 1Msps sampling rate position the LTC2393CUK-16 well in medical imaging front-ends such as ultrasound beamformers and patient monitoring systems. The wide ±VREF bipolar input range accepts ultrasound transducer outputs directly, while the zero cycle latency simplifies beamformer timing. The internal 4.096V reference with ±20ppm/°C max temperature coefficient provides stable full-scale accuracy across physiological temperature ranges. Source: Analog Devices LTC2393-16 datasheet.
Recommended
Motor Control Current Sensing
The LTC2393CUK-16's fully-differential input and 1Msps throughput with no pipeline delay make it well-suited for three-phase motor current sensing in FOC and field-oriented control loops. The wide analog input range accepts current-shunt amplifier outputs directly, and the parallel interface minimizes micro-controller latency for tight current-loop control. 16-bit resolution at 1Msps provides 16-bit dynamic range for accurate torque and speed control in servo drives. Source: Analog Devices LTC2393-16 datasheet application section.
Recommended
Vibration and Acoustic Analysis
The 94dB SNR and 1Msps throughput make the LTC2393CUK-16 a strong fit for vibration monitoring and acoustic analysis systems requiring 200kHz+ analog input bandwidth. The wide dynamic range captures both small vibration signatures and large transient events; zero-latency SAR sampling prevents time-domain artifacts common in pipeline ADCs. The internal 4.096V reference and pin-compatible LTC2389IUK-18 upgrade path (18-bit, 2.5Msps) enable resolution scaling without PCB rework. Source: Analog Devices LTC2393-16 datasheet.
Recommended
Automated Test Equipment (ATE) Digitizer
The 16-bit, 1Msps SAR architecture and 94dB SNR of the LTC2393CUK-16 make it a strong choice for ATE pin-driver cards, mass-production functional testers, and benchtop measurement instruments. Zero pipeline delay preserves stimulus-response timing, and the parallel interface allows direct FPGA/CPLD connection for high-density per-pin instrumentation. The 48-QFN (7x7) UK package enables compact per-channel layouts at high channel counts. Source: Analog Devices LTC2393-16 datasheet.
Recommended
Wideband Instrumentation and Oscilloscope Front-End
The 1Msps sample rate and 94dB SNR of the LTC2393CUK-16 are well-matched to benchtop oscilloscope front-end and wideband instrumentation applications. The parallel interface supports direct FPGA capture, and the SAR architecture's deterministic latency simplifies trigger and timebase design. The wide ±VREF bipolar input range accommodates the post-attenuator signal levels common in 100MHz-class oscilloscope front-ends. Source: Analog Devices LTC2393-16 datasheet.
Recommended
Recommended Products Summary
Engineering reference data for LTC2393CUK-16 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2393IUK-16 | LTC2392CUK-16 | LTC2389CUK-16 | LTC2389IUK-18 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | QFN-48 (UK 7x7) | QFN-48 (UK 7x7) - same | QFN-48 (UK 7x7) - same | QFN-48 (UK 7x7) - same | QFN-48 (UK 7x7) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 18 bit |
| Sample Rate | 1 Msps | 1 Msps | 500 ksps | 2.5 Msps | 2.5 Msps |
| SNR | 94 dB | 94 dB | 94 dB | 95 dB | 95 dB |
| Architecture | SAR | SAR | SAR | SAR | SAR |
| Input Range | ±VREF bipolar | ±VREF bipolar | ±VREF bipolar | ±VREF bipolar | ±VREF bipolar |
| Operating Temperature | 0°C to +70°C | -40°C to +85°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C |
Key Differentiators
- True bipolar ±VREF input with internal precision reference (vs LTC2389CUK-16)
- Zero cycle latency in both parallel and serial modes (vs LTC2373CUH-18)
- Wide analog supply tolerance (4.5V to 5.5V) (vs LTC2392CUK-16)
Design Notes
The LTC2393CUK-16 requires a low-noise 5V analog supply (AVDD) and a 1.71V-to-5.5V digital supply (OVDD). Place a 10uF X7R ceramic bulk capacitor plus a 0.1uF X7R bypass capacitor within 5mm of each AVDD pin. Star-route the analog and digital grounds to a single point near the IC to avoid digital return currents coupling into the analog front-end. Estimated: at 1Msps, the typical AVDD supply current is ~16mA; verify with the actual measured value from your board before finalizing the LDO headroom.
For best 94dB SNR performance, place the analog input traces as a differential pair on the top layer with a continuous ground plane beneath, and route them directly to the IN+ and IN- pins. Keep digital interface traces (parallel data bus, BUSY, CNV, SCK, SDO) away from the analog input traces by at least 5mm. The QFN-48 exposed pad must be soldered to a contiguous ground pad with at least 8 thermal vias (0.3mm diameter) to keep junction temperature within spec.
Estimated: source-impedance above 50 ohms will degrade THD at the 1Msps sampling rate. Add a wideband ADC driver such as the LT6203 in unity-gain configuration directly in front of the inputs to maintain 94dB SNR. Do not connect the OVDD pin to the AVDD pin directly; the output supply can be set to 1.8V, 3.3V, or 5V independently. Always perform a power-on sequence - drive CNV low after AVDD is stable - to avoid digital contention during supply ramp.
Compliance Information
RoHS compliant per Analog Devices product page. Pb-free PBF suffix variants available. Not AEC-Q100 qualified - choose automotive-grade equivalent for that requirement.
