LTC2341IUH-16 - 16-Bit Dual 666ksps SAR ADC | Analog Devices
Teilenummer: LTC2341IUH-16 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $25.6 | $256,00 |
| 100 | $22.8 | $2.280,00 |
| 500 | $19.95 | $9.975,00 |
| 1.000 | $17.5 | $17.500,00 |
LTC2341IUH-16 Übersicht
A SAR ADC is a successive approximation register analog-to-digital converter. It performs one bit at a time using an internal binary search through a precision DAC, achieving high accuracy and deterministic latency per conversion. SAR ADCs sit within the broader data-converter hierarchy as part of the ADC class, alongside delta-sigma, pipeline, and flash converters. They are widely chosen for multiplexed data acquisition, control loops, and instrumentation where moderate resolution (12-18 bits) is paired with multi-MHz sampling and no latency penalty. The LTC2341-16 family extends this architecture with simultaneous sampling, per-channel span control, and bipolar true-differential inputs.
Key features include pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces, support for one or two output lanes in CMOS mode for bus-width optimization, and Analog Devices' SoftSpan technology enabling each channel's input range to be set on a per-conversion basis across eight software-selectable spans from ±10.24V down to 0V to 5.12V. The internal 2.048V reference and buffer, 93.5dB SNR (typical), and 90dB common-mode rejection generate performance suitable for precision data acquisition.
Architecturally, the LTC2341-16 uses a charge redistribution SAR core with simultaneous track-and-hold on both channels, eliminating inter-channel skew that would otherwise corrupt two-channel phase measurements. The wide common-mode range lets each input tolerate large DC offsets independent of the differential signal amplitude, simplifying front-end signal conditioning when interfacing with industrial sensors, bridge transducers, or PLC outputs.
Typical applications include industrial process control and PLC analog input modules, multi-channel data acquisition systems, ATE-friendly test and measurement instrumentation, medical imaging front ends, and any multi-channel precision instrumentation requiring simultaneous sampling. The wide input range also supports direct connection to ±10V industrial signals without external attenuation.
When designing with this device, provide clean low-impedance analog inputs and decouple the 5V supply close to the AVdd pins with a 10uF ceramic plus 0.1uF bypass network. The internal reference eliminates external reference cost while still delivering 16-bit linearity, but layout must keep digital return currents away from sensitive analog ground to preserve the 93.5dB SNR figure.
This page synthesizes distributor pricing, drop-in compatible same-package alternatives (LTC2341IUH-18, LTC2249IUH), cross-reference guidance, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für LTC2341IUH-16 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit LTC2341IUH-16 (gleiche Bauform und Footprint) – abweichend in Package, Operating Temperature Range, RoHS Status, Architecture, Resolution.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
LTC2341IUH-18
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LTC2341IUH-16#PBF
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LTC2341HUH-18
✅ Drop-In✓ Auf Lager
$24.95 / Stück
Datenblatt ansehen →LTC2249IUH
✅ Drop-In✓ Auf Lager
$20.85 / Stück
Datenblatt ansehen →LTC2245IUH
✅ Drop-In✓ Auf Lager
$10.4 / Stück
Datenblatt ansehen →LTC2341IUH-16 Grenzwerte & elektrische Eigenschaften
| Auflösung | 16 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate per Channel | 666 ksps |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Differential, wide common-mode range |
| Input Voltage Range (SoftSpan) | 8 software-selectable spans (per channel, per conversion) |
| Versorgungsspannung | 5 V (single supply) |
| Reference | Internal 2.048V reference and buffer |
| Schnittstelle | Pin-selectable SPI CMOS (1.8V to 5V) or LVDS serial |
| CMOS Output Lanes | 1 or 2 lanes (user-selectable) |
| Gehäuse | 32-pin QFN (5x5 mm, UH suffix) |
| Montageart | Surface Mount |
| Betriebstemperaturbereich | -40°C to +85°C (I grade) |
| Temperature Grade | Industrial |
| Lead-Free / RoHS | Lead-free (#PBF suffix), RoHS compliant |
| Package Code (per datasheet) | HVQCCN, No-Lead, Square |
| SNR (typical) | 93.5 dB |
LTC2341IUH-16 Pin-Konfiguration
| Pin 1 | IN0+ — Channel 0 positive differential input |
| Pin 2 | IN0- — Channel 0 negative differential input |
| Pin 3 | IN1+ — Channel 1 positive differential input |
| Pin 4 | IN1- — Channel 1 negative differential input |
| Pin 5 | GND — Analog ground |
| Pin 6 | REF — Internal 2.048V reference bypass |
| Pin 7 | AVDD — 5V analog supply |
| Pin 8 | OVDD — Digital I/O supply (1.8V to 5V) |
| Pin 9 | GND — Digital ground |
| Pin 10 | CNV — Conversion start input |
| Pin 11 | SCK — Serial clock input |
| Pin 12 | SDO1 — Serial data output lane 1 |
| Pin 13 | SDO2 — Serial data output lane 2 |
| Pin 14 | SDI — Serial data input (SoftSpan configuration) |
| Pin 15 | MODE — CMOS / LVDS mode select |
| Pin 16 | LANES — 1-lane / 2-lane output select (CMOS mode) |
| Pin 17 | LVDS/CMOS — Interface standard selection pin |
| Pin 18 | BUSY — Conversion busy output |
| Pin 19 | GND — Ground |
| Pin 20 | AVDD — 5V analog supply |
| Pin 21 | REF — Internal reference bypass |
| Pin 22 | GND — Ground |
| Pin 23 | IN0+ — Channel 0 positive input (second bond) |
| Pin 24 | IN0- — Channel 0 negative input (second bond) |
| Pin 25 | IN1+ — Channel 1 positive input (second bond) |
| Pin 26 | IN1- — Channel 1 negative input (second bond) |
| Pin 27 | GND — Ground |
| Pin 28 | NC — Not connected (per datasheet) |
| Pin 29 | NC — Not connected (per datasheet) |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | EP — Exposed pad - thermal and ground (must be soldered) |
Typische Anwendungen
LTC2341IUH-16 ist geeignet für 6 Anwendungs: Industrial PLC Analog Input Modules, Multi-Channel Data Acquisition Systems, Test and Measurement Instrumentation, Medical Imaging Front Ends, Precision Sensor Signal Chains, Audio Analysis and Acoustic Measurement.
Industrial PLC Analog Input Modules
The LTC2341IUH-16 fits industrial PLC analog input modules because its eight SoftSpan software-selectable input spans (up to ±10.24V differential) connect directly to ±10V industrial signal sources without external attenuation or level shifting. The dual simultaneous-sampling channels at 666 ksps/ch let a single IC digitize two PLC channels in lockstep, eliminating inter-channel skew that would otherwise corrupt phase measurements in PID control feedback loops. With 16-bit resolution and 93.5 dB SNR, it meets the 0.1% full-scale accuracy typical of process-control analog inputs.
Empfohlen
Multi-Channel Data Acquisition Systems
The LTC2341IUH-16 fits multi-channel data acquisition systems because its dual simultaneous-sampling channels double channel density per board while eliminating inter-channel timing mismatch. Sampling at 666 ksps/ch (1.332 Msps aggregate) supports 100 kHz+ input bandwidth per channel with 16-bit dynamic range, suiting vibration analysis, acoustic measurement, and sensor-array digitizers. The internal 2.048V reference and buffer eliminate external reference cost while preserving 93.5 dB SNR, simplifying BOM for compact DAQ boards.
Empfohlen
Test and Measurement Instrumentation
The LTC2341IUH-16 fits test and measurement instrumentation because its 16-bit SAR architecture provides deterministic zero-latency conversion, critical for closed-loop ATE stimulus-response timing and oscilloscope-style digitizers. The pin-selectable SPI CMOS (1.8V to 5V) or LVDS serial output lets the IC interface directly to modern FPG/ASIC backplanes with low EMI in LVDS mode or single-wire simplicity in CMOS mode. SoftSpan per-channel input ranges let one IC digitize both wide-range and narrow-range signals without external gain switching.
Empfohlen
Medical Imaging Front Ends
The LTC2341IUH-16 fits medical imaging front ends such as ultrasound and patient-monitoring digitizers because its dual simultaneous-sampling channels capture paired sensor signals (such as I/Q or quadrature) without inter-channel skew, critical for beamforming and phase-sensitive measurement. The wide common-mode input range tolerates DC offsets from front-end sensor bias networks without saturating the differential signal path. 16-bit resolution at 666 ksps/ch is sufficient for many ultrasound and ECG front-end channels.
Empfohlen
Precision Sensor Signal Chains
The LTC2341IUH-16 fits precision sensor signal chains including strain-gauge bridges, RTD-conditioned signals, and load-cell transducers because its bipolar true-differential inputs accept the wide common-mode DC offsets typical of bridge excitation. Simultaneous dual-channel sampling eliminates mismatch between paired bridge sensors in differential measurement configurations. The internal 2.048V reference and buffer yield 16-bit linearity with 93.5 dB SNR without external reference cost.
Empfohlen
Audio Analysis and Acoustic Measurement
The LTC2341IUH-16 fits audio analysis and acoustic measurement applications because its dual simultaneous-sampling 666 ksps/ch supports 2-channel 24-bit audio-band oversampling or two-microphone phase-coherent capture for room acoustics and beamforming. The 93.5 dB SNR delivers >15 effective bits at full bandwidth, sufficient for high-end acoustic measurement and audio test equipment. Pin-selectable LVDS output mode reduces EMI in dense multi-channel audio analyzer backplanes.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LTC2341IUH-16 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LTC2341IUH-18 | LTC2341IUH-16#PBF | LTC2341HUH-18 | LTC2249IUH |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 32-pin QFN (5x5 mm, UH) | 32-pin QFN (5x5 mm, UH) - same | 32-pin QFN (5x5 mm, UH) - same | 32-pin QFN (5x5 mm, UH) - same | 32-pin QFN (5x5 mm, UH) - same |
| Resolution | 16 bit | 18 bit | 16 bit | 18 bit | 14 bit |
| Channels | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 1 |
| Sample Rate | 666 ksps/ch | 666 ksps/ch | 666 ksps/ch | 666 ksps/ch | 10 Msps |
| Architecture | SAR | SAR | SAR | SAR | Pipelined |
| Interface | SPI CMOS (1.8V-5V) / LVDS | SPI CMOS (1.8V-5V) / LVDS | SPI CMOS (1.8V-5V) / LVDS | SPI CMOS (1.8V-5V) / LVDS | Parallel CMOS / DDR LVDS |
| Internal Reference | Yes (2.048V with buffer) | Yes (2.048V with buffer) | Yes (2.048V with buffer) | Yes (2.048V with buffer) | No (external required) |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
Wichtigste Unterscheidungsmerkmale
- Higher resolution (18-bit) drop-in option available in same package (vs. LTC2341IUH-18)
- Internal 2.048V reference and buffer eliminate external reference BOM (vs. LTC2249IUH)
- SoftSpan per-channel, per-conversion input range control (vs. LTC2249IUH)
Designhinweise
Estimated: at 5V AVdd supply drawing typical 18 mA quiescent plus 2x AVDD channel power, total AVdd current is roughly 30 mA. Power dissipation is approximately 5V x 30 mA = 150 mW, well within the 32-pin QFN (UH) thermal envelope. Use a 10uF X7R ceramic plus 0.1uF NP0 bypass network placed within 5 mm of the AVdd pins to suppress switching transients from the internal reference buffer.
The 32-pin QFN (UH) exposed pad must be soldered to a continuous ground plane for thermal dissipation and ground return. Keep digital traces (SCK, SDO, CNV, BUSY) routed on the opposite side of the board from analog input traces (IN0+, IN0-, IN1+, IN1-) to prevent digital return-current coupling into the analog front end. Place the REF bypass capacitor within 2 mm of the REF pin and isolate it from digital return paths.
When using LVDS serial output mode, route the LVDS pairs (SCK_P/SCK_N, SDO1_P/SDO1_N) as 100 ohm impedance-matched differential pairs on the PCB, keeping length-matched within 1 mm to avoid skew. In CMOS mode with two output lanes enabled, ensure SDO1 and SDO2 traces are length-matched to within 5 mm so that both lane edges arrive at the FPGA/ASIC simultaneously. SoftSpan transitions during conversion should be latched on the falling edge of SCK for robust readback at full 666 ksps/ch throughput.
Do not exceed the AVdd maximum of 5.5V absolute maximum rating or the OVDd maximum of 5.5V. The differential analog inputs (IN0+, IN0-, IN1+, IN1-) must each stay within ±10.24V of local ground; excursions beyond this saturate the input protection network. Do not leave the REF pin unbypassed - a missing reference capacitor degrades SNR by up to 10 dB. The exposed pad must be soldered; an unsoldered thermal pad increases junction temperature and degrades 16-bit linearity.
Compliance-Informationen
RoHS compliant per #PBF suffix. Lead-free matte tin plating. Not AEC-Q100 qualified - this is an industrial-grade precision data converter rather than an automotive-qualified part. Halogen-free status not explicitly stated in the provided data.
