LTC2393HLX-16 - 16-Bit 1Msps SAR ADC, 94dB SNR, 48-LQFP | ADI
MPN: LTC2393HLX-16 ✓ Hoạt độngLTC2393HLX-16 Tóm tắt
What is a SAR ADC? A successive approximation register ADC is a precision data converter that uses a binary search algorithm through an internal DAC to digitize an analog input. SAR ADCs occupy the middle ground between high-speed flash converters and ultra-high-resolution delta-sigma ADCs, delivering low-latency, deterministic conversion with no pipeline delay. They sit within the broader hierarchy: data converter -> ADC -> SAR ADC -> precision mixed-signal IC, and are widely preferred when both speed and DC accuracy are required simultaneously.
Key features include an integrated precision reference with 0.5% initial accuracy and ±20 ppm/°C maximum temperature coefficient, eliminating the need for an external reference. The part supports both parallel and serial interface modes with no cycle latency, and provides true 16-bit no-missing-codes performance across the entire operating range. Internal low-noise architecture achieves 94.2 dB typical SNR at the full 1Msps throughput.
The LTC2393HLX-16 architecture combines a charge-redistribution capacitive DAC with a high-speed comparator and SAR logic, all clocked internally for low jitter. The differential input structure rejects common-mode noise and harmonic distortion, and the wide ±4.096V input range supports direct interfacing to industrial ±10V-scaled signals after attenuation. Single 5V operation simplifies power tree design in mixed-signal systems.
Typical applications include precision industrial process control, medical instrumentation, seismic data acquisition, high-speed multichannel data acquisition systems, and ATE (automatic test equipment). The wide input range and high SNR make it well suited for vibration analysis, sonar front-ends, and spectrum analyzer input stages.
When designing with this device, ensure the analog input common-mode voltage is biased near AVDD/2 and that the RC charge kick-back at the input is absorbed with an external buffer such as the LT6350. Decouple AVDD and DVDD independently with low-ESR ceramic capacitors placed close to the supply pins.
This page synthesizes distributor pricing, drop-in SAR ADC alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho LTC2393HLX-16 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC2393HLX-16 (cùng hình factor và footprint) — khác nhau ở Package, Digital Interface, Resolution, RoHS Status, Sample Rate.
LTC2393ILX-16
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2389ILX-16
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2391IUK-16
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2392CUK-16
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2348HLX-18
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2393HLX-16 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 bits |
| Architecture | SAR (Successive Approximation Register) |
| Sample Rate | 1 Msps |
| Number of Channels | 1 (single-ended / differential input) |
| Input Range | ±4.096 V fully differential |
| Analog Supply Voltage | 5 V (single supply) |
| INL (Max) | ±2 LSB |
| No Missing Codes | 16 bits (guaranteed) |
| SNR (Typical) | 94.2 dB |
| Internal Reference Accuracy | 0.5% (initial) |
| Reference Tempco | ±20 ppm/°C (max) |
| Giao diện | Parallel / Serial (selectable) |
| Latency | No cycle latency |
| Hộp | 48-LQFP (7x7 mm) |
| Trạng thái RoHS | Compliant (PBF suffix indicates lead-free) |
Cấu hình chân LTC2393HLX-16
| Chân 1 | A0+ — Differential analog input A0, positive |
| Chân 2 | A0- — Differential analog input A0, negative |
| Chân 3 | A1+ — Differential analog input A1, positive |
| Chân 4 | A1- — Differential analog input A1, negative |
| Chân 5 | REF — Reference bypass / output |
| Chân 6 | REFCOMP — Reference compensation pin |
| Chân 7 | GND — Analog ground |
| Chân 8 | AVDD — 5 V analog supply |
| Chân 9 | OVDD — Output driver supply |
| Chân 10 | DGND — Digital ground |
| Chân 11 | CLK — External clock input (optional, internal oscillator default) |
| Chân 12 | CNV — Start of conversion input |
| Chân 13 | BUSY — Conversion in progress output (active high) |
| Chân 14 | RD — Read input for parallel/serial output |
| Chân 15 | CS — Chip select input (active low) |
| Chân 16 | RESET — Reset input |
| Chân 17 | DB0 — Output data bit 0 (LSB) |
| Chân 18 | DB1 — Output data bit 1 |
| Chân 19 | DB2 — Output data bit 2 |
| Chân 20 | DB3 — Output data bit 3 |
| Chân 21 | DB4 — Output data bit 4 |
| Chân 22 | DB5 — Output data bit 5 |
| Chân 23 | DB6 — Output data bit 6 |
| Chân 24 | DB7 — Output data bit 7 |
| Chân 25 | DB8 — Output data bit 8 |
| Chân 26 | DB9 — Output data bit 9 |
| Chân 27 | DB10 — Output data bit 10 |
| Chân 28 | DB11 — Output data bit 11 |
| Chân 29 | DB12 — Output data bit 12 |
| Chân 30 | DB13 — Output data bit 13 |
| Chân 31 | DB14 — Output data bit 14 |
| Chân 32 | DB15 — Output data bit 15 (MSB) |
| Chân 33 | OGND — Output driver ground |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
LTC2393HLX-16 phù hợp cho 6 Áp dụngs: Precision Industrial Process Control, Medical Instrumentation Data Acquisition, Seismic and Vibration Data Acquisition, Automated Test Equipment (ATE) Digitizers, High-Speed Multichannel Data Acquisition Systems, Spectrum Analyzer Input Stages.
Precision Industrial Process Control
The LTC2393HLX-16 fits precision industrial process control with its 16-bit 1 Msps SAR architecture and 94.2 dB typical SNR, which digitizes 4-20 mA loop signals and strain-gauge bridge outputs with high DC accuracy. Its ±4.096 V differential input range directly interfaces to industrial ±10 V-scaled sensor outputs after a simple resistor divider, eliminating the need for an instrumentation front-end. The no-cycle-latency SAR conversion is critical for closed-loop PID control loops, where a sigma-delta filter delay would destabilize the control algorithm. With 0.5% internal reference accuracy, the part delivers stable readings across factory-floor temperature swings.
Được đề xuất
Medical Instrumentation Data Acquisition
In medical instrumentation such as patient monitoring and diagnostic imaging front-ends, the LTC2393HLX-16 provides 16-bit 1 Msps conversion with 94.2 dB SNR, preserving the dynamic range of low-amplitude bioelectric signals like ECG and EMG. The differential input structure rejects common-mode 50/60 Hz mains interference picked up on long patient leads. No pipeline delay means the digitized waveform is immediately available for real-time arrhythmia detection and alarm generation. Single 5 V operation simplifies medical-isolation power designs.
Được đề xuất
Seismic and Vibration Data Acquisition
Geophone and accelerometer arrays in seismic acquisition systems require wide dynamic range and high sampling rate to capture broadband vibration signatures, and the LTC2393HLX-16 fits with its 94.2 dB SNR and 1 Msps throughput. The SAR architecture delivers a single-sample deterministic latency, simplifying triggered event capture from multiple synchronized channels. The wide ±4.096 V input range accommodates the output of typical piezo-electric accelerometers without additional gain stages. Integrated precision reference removes drift concerns in long-duration field deployments.
Được đề xuất
Automated Test Equipment (ATE) Digitizers
In ATE pin-electronics and waveform digitizer cards, the LTC2393HLX-16 captures the full-scale amplitude and timing of device-under-test signals with 16-bit resolution and 1 Msps rate. The wide ±4.096 V differential input range simplifies front-end scaling for ±10 V stimulus/measurement channels commonly found in mixed-signal ATE. The integrated low-noise reference and tight ±2 LSB INL maximum guarantee repeatable parametric test results across the test floor's thermal environment.
Được đề xuất
High-Speed Multichannel Data Acquisition Systems
Multichannel DAQ systems for laboratory instrumentation and spectrum analyzers use the LTC2393HLX-16 to digitize multiple analog channels with deterministic latency, simplifying downstream DSP and triggering. The pin-compatible LQFP-48 footprint allows multiple LTC2393-16 family parts to share a common PCB layout, supporting per-channel resolution and speed trade-offs from 250 ksps to 1 Msps. Parallel interface mode enables direct connection to FPGAs for high-throughput buffered acquisition with no per-sample software overhead.
Được đề xuất
Spectrum Analyzer Input Stages
Spectrum analyzer and RF measurement front-ends use the LTC2393HLX-16 to digitize down-converted IF signals with 16-bit resolution and 94.2 dB SNR, preserving the spurious-free dynamic range of the analog signal chain. The 1 Msps rate supports analysis bandwidths in the 100s of kHz, suitable for audio-band and baseband signal characterization. SAR architecture's lack of group delay simplifies FFT-based triggering and gating in time-frequency analysis.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2393HLX-16 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC2393ILX-16 | LTC2389ILX-16 | LTC2391IUK-16 | LTC2392CUK-16 | LTC2348HLX-18 |
|---|---|---|---|---|---|---|
| Package | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same | LQFP-48 (7x7 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits | 16 bits | 18 bits | 16 bits | 16 bits | 18 bits |
| Sample Rate | 1 Msps | 1 Msps | 1 Msps | 250 ksps | 500 ksps | 200 ksps/octal ch |
Bảo phân biệt quan trọng
- 1 Msps true 16-bit SAR with 94.2 dB SNR in a single 5V-supply part (vsLTC2391IUK-16)
- Integrated precision reference eliminates external reference cost and drift (vsLTC2348HLX-18)
- No-cycle-latency conversion deterministic for closed-loop control (vsAD7768 (sigma-delta))
Ghi chú thiết kế
Place the 1 microfarat AVDD decoupling capacitor within 5 mm of the AVDD pin with a wide trace to a low-inductance ground via. A 0.1 microfarat ceramic in parallel absorbs high-frequency noise from the SAR charge kick-back. The REFCOMP pin must be decoupled with a 10 microfarat low-ESR ceramic capacitor and the REF pin bypassed with 4.7 microfarat ceramic, as specified in the manufacturer reference schematic. Separating analog and digital ground planes under the LQFP-48 keeps digital return currents away from the analog front-end.
Do not connect the LTC2393HLX-16 differential inputs directly to a low-impedance signal source; the SAR architecture draws charge kick-back at the start of each conversion and will degrade linearity unless buffered by a low-noise, fast-settling amplifier such as the LT6350. The common-mode input voltage must be biased near AVDD/2; failing to bias the inputs causes severe INL and SNR degradation. Avoid running noisy digital lines under or adjacent to the analog input traces.
Route the CNV (start-of-conversion) and BUSY signals with controlled impedance and short stub lengths to avoid timing skew in high-speed acquisitions. In parallel interface mode, the 16 output data lines should be length-matched to within 25 ps to maintain group-skew under 1 LSB at 1 Msps. If using the serial interface, isolate the SCK and SDO traces from the analog inputs with a ground guard trace.
Thông tin tuân thủ
PBF suffix denotes lead-free RoHS-compliant finish per Analog Devices ordering information.
