LTC2260IUJ-14 - 14-Bit 105Msps Ultralow Power 1.8V ADC | ADI
MPN: LTC2260IUJ-14 ✓ AktifLTC2260IUJ-14 Ringkasan
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous-time analog signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, FPGAs, or software. Within the broader signal chain, the ADC sits between the analog front end (amplifiers, filters, drivers) and the digital back end. Pipelined ADCs like the LTC2260-14 use a multi-stage architecture to achieve high sample rates at moderate resolution while keeping per-stage comparator counts and power dissipation low, making them well suited for high-speed data acquisition, communications, and imaging.
Key features of the LTC2260IUJ-14 include an 800 MHz full-power bandwidth sample-and-hold, selectable input ranges from 1 V P-P to 2 V P-P, an optional data output randomizer to reduce switching spurs, an optional clock duty cycle stabilizer, plus shutdown and nap modes for power management. The serial SPI port allows configuration of output mode, input range, and power-down behavior without external hardware changes.
Architecture-wise, the part is pin-compatible with the 12-bit LTC2260-12 and with the higher/lower-speed LTC2261-14 (125 Msps) and LTC2259-14 (80 Msps) variants, simplifying platform design across resolutions. The ultralow 106 mW dissipation makes it useful for thermally constrained embedded systems and portable instruments.
Typical applications include communications baseband receivers, high-speed imaging and instrumentation, software-defined radios, portable test and measurement, and medical ultrasound front-end boards where 14-bit dynamic range and 105 Msps sample rate offer a strong speed/resolution/power balance.
When designing with this ADC, ensure the analog inputs are driven by a low-noise, low-distortion amplifier capable of settling within one aperture window, and keep the analog/digital ground returns separate to limit coupling. Decouple the analog supply with low-ESR ceramic capacitors close to the AVDD pins to preserve SFDR.
This page synthesizes distributor pricing, parametric drop-in alternatives within the same QFN-40 (6x6) family, and practical design notes that are not consolidated in the manufacturer datasheet alone.
Alternatif penggantian untuk LTC2260IUJ-14 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian LTC2260IUJ-14 (sama faktor bentuk dan footprint) — berbeda di dalam Package, RoHS Status, Input Type, Power-Saving Modes, Sample Rate.
LTC2260CUJ-14#PBF
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
LTC2261IUJ-14#PBF
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC2259IUJ-14#PBF
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC2258IUJ-14#PBF
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC2260IUJ-14#TRPBF
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC2260IUJ-14 Rating Maksimal & Karakteristik Listrik
| Resolusi | 14 bit |
| Sample Rate | 105 Msps |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Supply Voltage (Analog/Digital) | 1.8 V (single supply) |
| Power Consumption | 106 mW at 105 Msps |
| INL (typical) | ±1 LSB |
| DNL (typical) | ±0.3 LSB |
| Transition Noise | 1.2 LSB RMS |
| Missing Codes | None over temperature |
| Input Range (selectable) | 1 V P-P to 2 V P-P |
| Full-Power Bandwidth | 800 MHz |
| Output Modes | CMOS, DDR CMOS, DDR LVDS |
| Output Supply Range | 1.2 V to 1.8 V (CMOS) |
| Configuration Interface | Serial SPI |
| Power-Saving Modes | Shutdown, Nap |
| Optional Features | Data output randomizer, clock duty cycle stabilizer |
| Paket | 40-QFN (6x6 mm) |
| Pin/Package Compatibility | Pin-compatible with LTC2260-12, LTC2261-14, LTC2259-14 |
| Rentang Suhu Kerja | -40 C to +85 C (Industrial, IUJ suffix) |
| Tipe Mounting | Surface Mount |
| Status RoHS | Compliant (#PBF suffix) |
Konfigurasi Pin LTC2260IUJ-14
| Pin produk 1 | GND — Ground |
| Pin produk 2 | AIN+ — Differential analog input positive |
| Pin produk 3 | AIN- — Differential analog input negative |
| Pin produk 4 | VCM — Common-mode voltage output (approx mid-supply) |
| Pin produk 5 | GND — Ground |
| Pin produk 6 | REFH — Reference high decoupling node |
| Pin produk 7 | REFL — Reference low decoupling node |
| Pin produk 8 | GND — Ground |
| Pin produk 9 | AVDD — 1.8 V analog supply |
| Pin produk 10 | GND — Ground |
| Pin produk 11 | CLK+ — Differential clock input positive |
| Pin produk 12 | CLK- — Differential clock input negative |
| Pin produk 13 | OGND — Output driver ground |
| Pin produk 14 | OVDD — Output driver supply (1.2 V to 1.8 V) |
| Pin produk 15 | OE — Output enable (active high) / SDIO for SPI |
| Pin produk 16 | D0-/D0 — Data output bit 0 (DDR mode: negative edge) |
| Pin produk 17 | D0+/NC — Data output bit 0 positive edge (or NC depending on mode) |
| Pin produk 18 | D1-/D1 — Data output bit 1 |
| Pin produk 19 | D1+/NC — Data output bit 1 positive edge |
| Pin produk 20 | D2-/D2 — Data output bit 2 |
| Pin produk 21 | D2+/NC — Data output bit 2 positive edge |
| Pin produk 22 | D3-/D3 — Data output bit 3 |
| Pin produk 23 | D3+/NC — Data output bit 3 positive edge |
| Pin produk 24 | D4-/D4 — Data output bit 4 |
| Pin produk 25 | D4+/NC — Data output bit 4 positive edge |
| Pin produk 26 | D5-/D5 — Data output bit 5 |
| Pin produk 27 | D5+/NC — Data output bit 5 positive edge |
| Pin produk 28 | D6-/D6 — Data output bit 6 |
| Pin produk 29 | D6+/NC — Data output bit 6 positive edge |
| Pin produk 30 | D7-/D7 — Data output bit 7 |
| Pin produk 31 | D7+/NC — Data output bit 7 positive edge |
| Pin produk 32 | D8-/D8 — Data output bit 8 |
| Pin produk 33 | D8+/NC — Data output bit 8 positive edge |
| Pin produk 34 | D9-/D9 — Data output bit 9 |
| Pin produk 35 | D9+/NC — Data output bit 9 positive edge |
| Pin produk 36 | D10-/D10 — Data output bit 10 |
| Pin produk 37 | D10+/NC — Data output bit 10 positive edge |
| Pin produk 38 | D11-/D11 — Data output bit 11 |
| Pin produk 39 | D11+/NC — Data output bit 11 positive edge |
| Pin produk 40 | D12-/D12 — Data output bit 12 |
| Pin produk 41 | D12+/NC — Data output bit 12 positive edge |
| Pin produk 42 | D13-/D13 — Data output bit 13 |
| Pin produk 43 | D13+/NC — Data output bit 13 positive edge |
| Pin produk 44 | OF-/FRAME — Output flag / FRAME indicator |
| Pin produk 45 | CS — SPI chip select (active low) |
| Pin produk 46 | SCK — SPI serial clock |
| Pin produk 47 | SDO — SPI serial data output |
| Pin produk 48 | GND — Exposed pad ground (thermal pad on bottom of QFN) |
Aplikasi Umum
LTC2260IUJ-14 cocok untuk 6 aplikasis: Communications Baseband Receiver, Software-Defined Radio (SDR) Front End, Medical Ultrasound Beamformer, Portable Test & Measurement Instrumentation, High-Speed Imaging & Machine Vision, Industrial Data Acquisition Systems.
Communications Baseband Receiver
The LTC2260IUJ-14 fits baseband digitization of cellular and wireless infrastructure receivers where 14-bit resolution and 105 Msps sampling capture complex I/Q waveforms with adequate dynamic range. Its selectable DDR LVDS outputs and separate 1.2-1.8 V OVDD simplify interfacing to modern FPGAs such as Xilinx and Altera devices without external level translation, while the 106 mW dissipation supports dense multi-channel receiver cards.
Direkomendasikan
Software-Defined Radio (SDR) Front End
The LTC2260IUJ-14's 800 MHz full-power analog bandwidth allows direct undersampling of IF frequencies well above the 52.5 MHz Nyquist limit, enabling wideband SDR capture with a single ADC channel. Its 1.2 LSB RMS transition noise preserves spurious-free dynamic range for narrowband signal extraction, while 106 mW dissipation is friendly to battery-powered SDR platforms and cognitive-radio prototypes.
Direkomendasikan
Medical Ultrasound Beamformer
Ultrasound front-end boards require low-power, high-resolution ADCs to digitize echoes across many channels simultaneously. The LTC2260IUJ-14's 14-bit dynamic range and 106 mW dissipation per channel enable dense channel-count boards without aggressive thermal management, while the pin-compatible LTC2261-14 (125 Msps) and LTC2259-14 (80 Msps) allow tiered channel sampling rates within a single PCB platform.
Direkomendasikan
Portable Test & Measurement Instrumentation
Handheld oscilloscopes, spectrum analyzers, and data-acquisition modules benefit from the LTC2260IUJ-14's 1.8 V single-supply operation and 106 mW dissipation, which together extend battery run-time while preserving 14-bit measurement accuracy. The optional clock duty-cycle stabilizer relaxes FPGA source-synchronous timing margins, allowing lower-cost clocking in field-deployed instruments.
Direkomendasikan
High-Speed Imaging & Machine Vision
Line-scan and area-scan cameras requiring 14-bit pixel depth at high frame rates leverage the LTC2260IUJ-14's 105 Msps capability and DDR LVDS output for fast off-board transfer. The 800 MHz input bandwidth supports CCD/CIS analog front ends with minimal group-delay variation, while shutdown/nap modes reduce power when scan lines are idle, conserving overall system energy budget.
Direkomendasikan
Industrial Data Acquisition Systems
Multi-channel vibration, sonar, and process-control data-acquisition cards benefit from the LTC2260IUJ-14's industrial -40 C to +85 C temperature rating and pin-compatible family, letting one PCB support 80/105/125 Msps configurations. The serial SPI port enables in-system gain and output-mode reconfiguration during factory calibration cycles without hardware changes.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk LTC2260IUJ-14 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | LTC2260CUJ-14#PBF | LTC2261IUJ-14#PBF | LTC2259IUJ-14#PBF | LTC2258IUJ-14#PBF |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 40-QFN (6x6) | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sample Rate | 105 Msps | 105 Msps | 125 Msps | 80 Msps | 65 Msps |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Temperature Grade | Industrial -40 C to +85 C | Commercial 0 C to +70 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C |
| Output Modes | CMOS / DDR CMOS / DDR LVDS | CMOS / DDR CMOS / DDR LVDS | CMOS / DDR CMOS / DDR LVDS | CMOS / DDR CMOS / DDR LVDS | CMOS / DDR CMOS / DDR LVDS |
Diferensiator Kunci
- Pin-compatible with 12-bit and 12/14-bit speed siblings (vsLTC2260IUJ-12 (12-bit))
- Ultralow 106 mW dissipation (vsLTC2261IUJ-14 (125 Msps))
- Selectable 1 V P-P / 2 V P-P input range via SPI (vsLTC2258IUJ-14 (65 Msps))
Catatan Desain
Decouple AVDD with at least 1 x 10 uF bulk + 1 x 0.1 uF X7R ceramic close to each AVDD pin; place OVDD decoupling (1.2-1.8 V) similarly. The 106 mW dissipation across multiple channels quickly accumulates, so plan copper pour under the exposed pad to keep junction temperature within the -40 C to +85 C industrial envelope. Estimated: with theta_JA ~28 C/W for the 6x6 QFN and 106 mW dissipation, junction rise ~3 C above ambient - well within limits but rises proportionally if multiple ADCs are stacked.
Keep analog input traces matched and length-balanced to preserve 800 MHz full-power bandwidth; use 100-ohm differential routing for AIN+/AIN- and CLK+/CLK-. Route digital outputs (DDR LVDS or CMOS) on an inner layer separated by a solid ground plane to limit digital-to-analog coupling. Place the reference decoupling caps (REFH/REFL) within 2 mm of the package to avoid reference-noise degradation of SFDR.
Do not float the OE/CS pin - tie CS low only after configuring output mode via SPI. Mismatched impedance at the analog input causes INL degradation at high input frequencies; verify transformer or amplifier source impedance matches the 1 V P-P / 2 V P-P setting. Driving the analog input outside 0 to AVDD range risks latch-up; clamp with protection diodes for hot-plug-capable front ends.
Informasi Konformitas
#PBF suffix denotes RoHS-compliant / lead-free. REACH SVHC, halogen-free, and conflict-minerals declarations must be obtained from Analog Devices' environmental portal. Part is not AEC-Q100 qualified (industrial, not automotive).
