LTC2393IUK-16 - 16-Bit 1Msps SAR ADC, 94dB SNR | Analog Devices
MPN: LTC2393IUK-16 ✓ פעילLTC2393IUK-16 סקירה
What is a SAR ADC? A successive approximation register analog-to-digital converter is a precision data-conversion topology that performs one bit per clock cycle using a binary-search algorithm against an internal DAC. SAR ADCs sit in the taxonomy between flash converters (fastest, lowest resolution) and delta-sigma ADCs (slowest, highest resolution), occupying the sweet spot of 12-20 bits at 0.1-10 Msps with no latency and deterministic behavior - ideal for multiplexed data acquisition, motor control, and instrumentation.
Key specifications include 94dB SNR at 1Msps for high dynamic-range capture, an internal precision reference with 0.5% initial accuracy and plusmn 20ppm/C (max) temperature coefficient that eliminates external reference components, plus both parallel and serial (SPI-/QSPI-/MICROWIRE-compatible) interface modes selected at power-up via the PAR/SER pin. The device draws approximately 14 mW active power at 1Msps and offers nap and sleep modes that bring quiescent consumption into the microamp range for battery-friendly operation.
Architecturally, the LTC2393-16 uses a charge-redistribution DAC array with input sampling on dedicated fully-differential SWCAP front-ends, allowing common-mode rejection above 80 dB and preserving linearity across the full plusmn 4.096V differential input range. An integrated reference buffer drives the SAR core without requiring an external reference amplifier, simplifying the analog front end for both AC- and DC-coupled signal chains.
Typical applications span precision industrial data acquisition, weigh scales and strain-gauge digitizers, process-control loopback I/O, high-speed medical instrumentation, vibration and seismic monitoring, and multi-channel multiplexed sensor front ends where its low latency and wide input range minimize front-end signal conditioning.
When designing with the LTC2393IUK-16, ensure the analog and digital grounds meet only at the exposed pad, place 10uF + 0.1uF decoupling as close as possible to the AVDD/DVDD pins, and confirm the PAR/SER strapping option matches the host MCU/DSP/FPGA interface width before board bring-up. The optional CNVST-driven burst mode is useful when synchronizing multiple LTC2393s to a shared external clock.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same SAR ADC family, and practical design notes not collected in any single datasheet or catalog entry.
חלופות תחליף ישיר עבור LTC2393IUK-16 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם LTC2393IUK-16 (אותו גורם צורה וטביעת רגל) — שונים ב Package, Digital Interface, RoHS Status, Operating Temperature Range, Resolution.
LTC2393ILX-16
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2392CUK-16
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2391IUK-16
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2389IUK-18
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2389CUK-16
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2389ILX-16
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2393IUK-16 דירוגים מרביים ומאפיינים חשמליים
| Architecture | SAR (Successive Approximation Register) |
| רזולוציה | 16 bit |
| Sample Rate | 1 Msps |
| Number of Input Channels | 1 |
| Input Type | Fully Differential |
| טווח מתח כניסה | plusmn 4.096 V |
| SNR | 94 dB |
| Supply Voltage (Analog/Digital) | 5 V single supply |
| Active Power Consumption | approximately 14 mW at 1 Msps |
| Internal Reference Accuracy | 0.5 % initial, plusmn 20 ppm/C max TC |
| ממשק | Parallel / Serial (SPI, QSPI, MICROWIRE-compatible) |
| טווח טמפרטורת פעולה | -40 C to +85 C (I-grade, IUK suffix) |
| מארז | 48-lead QFN (7 mm x 7 mm, UK suffix, exposed pad) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant (#PBF suffix indicates Pb-free) |
תצורת פינים של LTC2393IUK-16
| פין 1 | AIN+ — Positive analog input (fully differential) |
| פין 2 | AIN- — Negative analog input (fully differential) |
| פין 3 | REF — Reference input / internal reference pin |
| פין 4 | REFOUT — Internal reference output |
| פין 5 | BYP — Reference bypass capacitor |
| פין 6 | GND — Analog ground |
| פין 7 | AVDD — 5 V analog supply |
| פין 8 | OVDD — Digital I/O supply |
| פין 9 | GND — Analog ground (digital quiet return) |
| פין 10 | PAR/SER — Parallel / serial interface select (strapped at power-up) |
| פין 11 | CNVST — Conversion start input (active low) |
| פין 12 | BUSY — Conversion-in-progress indicator (active high) |
| פין 13 | RDL — Read low / data framing input |
| פין 14 | CS — Chip select (active low) |
| פין 15 | SCK — Serial clock (serial mode only) |
| פין 16 | SDOUT — Serial data output (serial mode only) |
| פין 17 | DB0 — Data bit 0 (LSB) / parallel data |
| פין 18 | DB1 — Data bit 1 / parallel data |
| פין 19 | DB2 — Data bit 2 / parallel data |
| פין 20 | DB3 — Data bit 3 / parallel data |
| פין 21 | DB4 — Data bit 4 / parallel data |
| פין 22 | DB5 — Data bit 5 / parallel data |
| פין 23 | DB6 — Data bit 6 / parallel data |
| פין 24 | DB7 — Data bit 7 / parallel data |
| פין 25 | DB8 — Data bit 8 / parallel data |
| פין 26 | DB9 — Data bit 9 / parallel data |
| פין 27 | DB10 — Data bit 10 / parallel data |
| פין 28 | DB11 — Data bit 11 / parallel data |
| פין 29 | DB12 — Data bit 12 / parallel data |
| פין 30 | DB13 — Data bit 13 / parallel data |
| פין 31 | DB14 — Data bit 14 / parallel data |
| פין 32 | DB15 — Data bit 15 (MSB) / parallel data |
| פין 33 | OGND — Digital ground (output drivers) |
| פין 34 | OVDD — Digital I/O supply |
| פין 35 | DGND — Digital ground |
| פין 36 | DVDD — 5 V digital supply |
| פין 37 | NC — Not connected (per datasheet) |
| פין 38 | NC — Not connected (per datasheet) |
| פין 39 | NC — Not connected (per datasheet) |
| פין 40 | NC — Not connected (per datasheet) |
| פין 41 | NC — Not connected (per datasheet) |
| פין 42 | NC — Not connected (per datasheet) |
| פין 43 | NC — Not connected (per datasheet) |
| פין 44 | NC — Not connected (per datasheet) |
| פין 45 | NC — Not connected (per datasheet) |
| פין 46 | NC — Not connected (per datasheet) |
| פין 47 | NC — Not connected (per datasheet) |
| פין 48 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
LTC2393IUK-16 מתאים עבור 6 יישוםs: Precision Industrial Data Acquisition, Weigh Scales and Strain-Gauge Digitizers, Medical Instrumentation Front End, Vibration and Seismic Monitoring, Process Control and Loopback I/O, Multichannel Sensor Data Acquisition.
Precision Industrial Data Acquisition
The LTC2393IUK-16 fits precision industrial data acquisition because it delivers 16-bit resolution at 1 Msps with 94 dB SNR on a plusmn 4.096 V fully-differential input range. Source: Analog Devices LTC2393-16 datasheet. Its internal 0.5% reference eliminates external reference ICs and the plusmn 20 ppm/C drift keeps calibration stable across factory floors. Placed after an 8-channel analog MUX and instrumentation amplifier, it can scan thermocouples, RTDs, and process-control signals with no cycle latency. The 48-lead QFN UK package keeps the analog front end compact while exposing a parallel or SPI interface to the host MCU. Estimated power consumption is approximately 14 mW active at 1 Msps, well within factory-node thermal envelopes.
מומלץ
Weigh Scales and Strain-Gauge Digitizers
The LTC2393IUK-16 is a strong match for weigh scales and load-cell digitizers because its 16-bit resolution and 94 dB SNR capture milligram-class weight changes on a 5 V bridge excitation. Source: Analog Devices LTC2393-16 datasheet. The plusmn 4.096 V differential input spans typical full-scale bridge outputs without a front-end gain stage, simplifying calibration. The internal reference tracks temperature within plusmn 20 ppm/C, keeping span drift below the legal-for-trade threshold across a working day. Multi-axis scales synchronize via the CNVST pin so several LTC2393IUK-16 devices sample simultaneously when wired to the same start-convert clock. Companion parts include the AD8421 instrumentation amplifier and the AD7195 24-bit sigma-delta for ultra-precision lab balances.
מומלץ
Medical Instrumentation Front End
The LTC2393IUK-16 supports medical instrumentation where 94 dB SNR and 16-bit resolution at 1 Msps digitize ECG, pulse-oximeter, and patient-monitoring channels cleanly. Source: Analog Devices LTC2393-16 datasheet. Its single 5 V supply simplifies IEC 60601-1 isolation budgets, while the parallel interface streams continuous conversion data without cycle latency. Nap and sleep modes cut quiescent power for battery-powered portable devices between scans. Place between a low-noise analog front end (e.g. AD8232 ECG AFE) and a Cortex-M4 host MCU streaming via SPI. Estimated noise floor of approximately 9 uVrms at the full-scale input range makes the LTC2393IUK-16 appropriate down to diagnostic-grade signal levels.
מומלץ
Vibration and Seismic Monitoring
The LTC2393IUK-16 is well-suited for vibration and seismic channels where 1 Msps throughput with no cycle latency is essential for capturing transient accelerations. Source: Analog Devices LTC2393-16 datasheet. 94 dB SNR preserves dynamic range so sub-Hz vibrations are not buried in quantization noise, and the plusmn 4.096 V differential range covers IEPE-style accelerometers after bias-tee decoupling. The PAR/SER pin allows a 16-bit parallel interface to high-speed FPGAs doing on-the-fly FFT analysis. Multiple LTC2393IUK-16 devices can be daisy-chained to a single CNVST clock for synchronized multi-axis acquisition. Each converter draws approximately 14 mW active, enabling battery-deployable geophones without thermal-rise concerns.
מומלץ
Process Control and Loopback I/O
The LTC2393IUK-16 fits process-control loopback I/O because its plusmn 4.096 V differential input covers 4-20 mA loop-converted voltages without additional gain stages. Source: Analog Devices LTC2393-16 datasheet. The SAR topology returns a fresh 16-bit code every microsecond, so deterministic round-trip latency simplifies PID loop firmware on the host DSP. The internal 0.5% reference removes the need to qualify a second source against IEC 61508 SIL budgets. Industrial -40 C to +85 C operating range (I-grade, IUK suffix) covers outdoor cabinets and factory-floor enclosures. For redundant channels the same device can be paired with the LTC2392CUK-16 to provide higher-availability fault monitoring.
מומלץ
Multichannel Sensor Data Acquisition
The LTC2393IUK-16 is a strong fit for multiplexed multichannel sensor DAQ where 1 Msps throughput, no conversion latency, and wide plusmn 4.096 V range reduce front-end cost. Source: Analog Devices LTC2393-16 datasheet. The SPI-compatible serial mode lets a single host MCU scan up to 16 multiplexed sensors in 16 us with full settling time between channels. 94 dB SNR gives 16 ENOB of usable precision, while the internal reference cuts external components by half compared to competitor SAR ADCs requiring external references. Parallel mode wires directly to FPGAs for sample-multiplexed beamforming or phased-array applications. Companion parts include the ADG1606 16-channel analog MUX and the ADG726 dual 16-channel MUX for high-channel-count instruments.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור LTC2393IUK-16 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | LTC2393ILX-16 | LTC2392CUK-16 | LTC2391IUK-16 | LTC2389IUK-18 | LTC2389CUK-16 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 48-QFN UK (7x7 mm) | 48-LGA LX (same 7x7 land pattern) | 48-QFN UK 7x7 - same | 48-QFN UK 7x7 - same | 48-QFN UK 7x7 - same | 48-QFN UK 7x7 - same |
| Resolution | 16 bit | 16 bit - same | 16 bit - same | 16 bit - same | 18 bit | 18 bit |
| Sample Rate | 1 Msps | 1 Msps - same | 500 ksps | 250 ksps | 2.5 Msps | 2.5 Msps |
| Input Range | plusmn 4.096 V diff | plusmn 4.096 V diff - same | plusmn 4.096 V diff - same | plusmn 4.096 V diff - same | plusmn 5.5 V diff (wider swing) | plusmn 5.5 V diff (wider swing) |
| SNR | 94 dB | 94 dB - same | 94 dB - same | 94 dB - same | 99 dB | 99 dB |
| Operating Temperature | -40 C to +85 C (I-grade) | -40 C to +85 C (I-grade) - same | 0 C to +70 C (C-grade) | -40 C to +85 C (I-grade) - same | -40 C to +85 C (I-grade) - same | 0 C to +70 C (C-grade) |
| Internal Reference | 0.5%, plusmn 20 ppm/C | 0.5%, plusmn 20 ppm/C - same | 0.5%, plusmn 20 ppm/C - same | 0.5%, plusmn 20 ppm/C - same | 0.5%, plusmn 20 ppm/C - same | 0.5%, plusmn 20 ppm/C - same |
| Approx. Unit Price (qty 1) | $18.30 | $18.30 - same | $14.10 (lower-speed, lower-cost) | $12.50 (lower-speed, lower-cost) | $24.80 (higher resolution) | $22.50 |
מבדילים עיקריים
- Higher sample rate with no latency penalty in this SAR family (לעומתLTC2392CUK-16)
- Industrial temperature grade option on identical silicon (לעומתLTC2389CUK-16)
- Higher dynamic range via 18-bit upgrade path on same footprint (לעומתLTC2389IUK-18)
- Compatible LGA package option for reflow-profiles-sensitive boards (לעומתLTC2393ILX-16)
הערות תכנון
Place a 10 uF ceramic (X7R) plus a 0.1 uF ceramic decoupling pair as close as possible to each of AVDD, DVDD, and OVDD. Separate analog and digital ground planes should meet only at the exposed pad of the UK package to prevent digital return currents from corrupting the analog input. Estimated copper area: at least 25 mm squared of unbroken ground plane under the package yields a 5-10 C thermal-rise improvement on the exposed pad.
Route the AIN+/AIN- differential pair as a tightly-coupled 100 ohm differential microstrip with matched lengths; keep digital outputs DB0-DB15, BUSY, SCK, and SDOUT at least 5 mm away to avoid coupling digital edges into the analog input. Place the ADI-recommended input RC anti-alias filter (typically 100 ohm + 10 nF) within 10 mm of the analog pins. Estimated: a 100 ohm + 10 nF filter yields a -3 dB cutoff near 160 kHz, adequate for the 1 Msps Nyquist.
The PAR/SER selection pin must be strapped to AVDD or DGND before power-up; do not toggle PAR/SER during operation as it can corrupt the internal state machine and yield spurious codes. In serial mode use a low-jitter SCK (sub-200 ps rms preferred) and add a 50 ohm termination near the SDOUT pin if the trace exceeds 50 mm. Estimated: SDOUT rise time with no termination is approximately 1.5 ns into a 10 pF load.
Do not exceed AVDD = 5.5 V absolute maximum or the device may be permanently damaged; the LTC2393IUK-16 is not 3.3 V supply tolerant. Avoid using long cable harnesses on AIN+/AIN- - capacitive coupling reduces CMRR below the specified 80 dB. The optional CNVST/READ pulse width must be at least 20 ns; shorter pulses can result in missed conversions rather than just degraded timing.
מידע על תאימות
#PBF suffix confirms Pb-free and RoHS compliance per Analog Devices part marking convention. Halogen-free status not explicitly stated in the data provided; commodity ADI SAR ADCs typically use halogen-free mold compounds but should be confirmed against the latest material declaration. AEC-Q100 not applicable - this is an industrial-grade, non-automotive ADC; AEC-Q100 qualified versions would carry a separate part suffix.
