LTC2263IUJ-14 - 14-Bit 25Msps Dual ADC | Analog Devices
MPN: LTC2263IUJ-14 ✓ Hoạt độngLTC2263IUJ-14 Tóm tắt
An ADC (analog-to-digital converter) is a mixed-signal semiconductor that samples continuous analog input voltages and produces discrete digital codes at a fixed sample rate; pipelined ADCs use a cascade of low-resolution stages to achieve high throughput at modest power, making them the workhorse architecture for communications, imaging, and instrumentation. The LTC2263IUJ-14 belongs to the power-management-and-conversion family and specifically to the pipelined ADC sub-class, integrating two simultaneously-sampling converters, internal reference, and LVDS drivers in one IC. Its 1.8 V single-supply operation simplifies power-tree design and pairs naturally with LVDS-capable FPGAs.
Key features of the LTC2263IUJ-14 include 73.4 dB SNR, 90 dB SFDR (typical), 25 Msps per-channel sample rate, serial LVDS output with 2-lane or 1-lane option, internal bandgap reference, low power dissipation (typical 60 mW per channel at 25 Msps), and an operating temperature range of -40°C to +85°C (I-grade). The exposed pad on the QFN-40 package provides a low thermal-resistance path (θJA of approximately 33°C/W), enabling compact multi-channel designs without external heatsinking.
Typical applications for the LTC2263IUJ-14 include high-speed data acquisition, communications receivers, digital oscilloscopes, medical imaging front-ends, multi-channel software-defined radio (SDR), and portable instrumentation. Its dual simultaneous-sampling architecture is especially suited to I/Q baseband, diversity receivers, and time-interleaved measurement systems where channel-to-channel phase coherence is critical.
When designing with this ADC, maintain a multilayer PCB with an unbroken internal ground plane beneath the device, drive each analog input differentially for best SFDR, and decouple the 1.8 V supply with 1 µF and 0.1 µF ceramics placed within a few millimetres of the supply pins. The exposed pad must be soldered to a low-impedance ground plane to achieve the rated thermal and electrical performance.
Bộ thay thế dễ dàng lắp đặt cho LTC2263IUJ-14 — 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 LTC2263IUJ-14 (cùng hình factor và footprint) — khác nhau ở Package, Number of Channels, Resolution, RoHS Status, Sample Rate.
LTC2263CUJ-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2264IUJ-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2265IUJ-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2260IUJ-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2262IUJ-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2258IUJ-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2263IUJ-14 Tỷ lệ tối đa & tính chất điện
| Manufacturer | Analog Devices (formerly Linear Technology) |
| Part Number | LTC2263IUJ-14 |
| Description | 14-Bit, 25 Msps, Low Power Dual ADC |
| Độ phân giải | 14 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 25 Msps per channel |
| Architecture | Pipelined |
| Điện áp cung cấp | 1.8 V single supply |
| INL (Typical) | ±1 LSB |
| DNL (Typical) | ±0.3 LSB |
| Transition Noise | 1.2 LSB RMS |
| Missing Codes | None over temperature |
| Digital Output | Serial LVDS (2-lane or 1-lane mode) |
| Analog Input | Differential (recommended) |
| Khoảng nhiệt độ hoạt động | -40°C to +85°C (I-grade) |
| Hộp | 40-QFN (6x6 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (#PBF suffix) |
Cấu hình chân LTC2263IUJ-14
| Chân 1 | AIN1+ — Channel 1 analog input, positive (differential) |
| Chân 2 | AIN1- — Channel 1 analog input, negative (differential) |
| Chân 3 | AVDD1 — 1.8V analog supply for channel 1 |
| Chân 4 | AVSS1 — Analog ground for channel 1 |
| Chân 5 | REF — Internal reference decoupling |
| Chân 6 | REFT — Reference top decoupling |
| Chân 7 | REFB — Reference bottom decoupling |
| Chân 8 | AVDD — Analog 1.8V supply |
| Chân 9 | AVSS — Analog ground |
| Chân 10 | OGND — Output driver ground |
| Chân 11 | OVDD — LVDS output driver 1.8V supply |
| Chân 12 | FRAME — Frame synchronization output |
| Chân 13 | DCO — DDR LVDS data clock output |
| Chân 14 | DAO+ — Channel 1 LVDS data output, positive |
| Chân 15 | DAO- — Channel 1 LVDS data output, negative |
| Chân 16 | DBO+ — Channel 2 LVDS data output, positive |
| Chân 17 | DBO- — Channel 2 LVDS data output, negative |
| Chân 18 | MODE — 1-lane / 2-lane mode select |
| Chân 19 | OF — Output format select |
| Chân 20 | CS — Chip select / SPI serial interface |
| Chân 21 | SCK — Serial interface clock |
| Chân 22 | SDO — Serial interface data output |
| Chân 23 | SDI — Serial interface data input |
| Chân 24 | OGND — Output driver ground |
| Chân 25 | CLK+ — Sample clock input, positive |
| Chân 26 | CLK- — Sample clock input, negative |
| Chân 27 | AVDD2 — Analog 1.8V supply for channel 2 |
| Chân 28 | AVSS2 — Analog ground for channel 2 |
| Chân 29 | AIN2- — Channel 2 analog input, negative |
| Chân 30 | AIN2+ — Channel 2 analog input, positive |
| Chân 31 | AVSS — Analog ground |
| Chân 32 | AVDD — Analog 1.8V supply |
| Chân 33 | NC — Not connected |
| Chân 34 | NC — Not connected |
| Chân 35 | NC — Not connected |
| Chân 36 | NC — Not connected |
| Chân 37 | NC — Not connected |
| Chân 38 | NC — Not connected |
| Chân 39 | NC — Not connected |
| Chân 40 | AVDD — Analog 1.8V supply |
Ứng dụng tiêu biểu
LTC2263IUJ-14 phù hợp cho 6 Áp dụngs: Multi-Channel Data Acquisition, Communications Receiver Baseband, Digital Oscilloscope Front-End, Medical Imaging Front-End, Software Defined Radio (SDR), Portable Test & Measurement.
Multi-Channel Data Acquisition
The LTC2263IUJ-14 is purpose-built for multi-channel data acquisition systems where two simultaneously-sampled signals must be digitized with channel-to-channel phase coherence. Its dual 25 Msps, 14-bit channels with ±1 LSB INL and 1.2 LSB RMS transition noise provide enough dynamic range for instrumentation-class front-ends. The serial LVDS output (2-lane or 1-lane mode) reduces FPGA pin count, and the 1.8 V single supply simplifies the power tree. Place the ADC close to the analog front-end, use a multilayer PCB with unbroken ground plane, and drive inputs differentially with a low-jitter clock to extract maximum SNR across the 12.5 MHz Nyquist band.
Được đề xuất
Communications Receiver Baseband
In digital communications receivers, the LTC2263IUJ-14 simultaneously digitizes the I and Q baseband outputs of a quadrature demodulator with phase-locked sampling. Its 73 dB SNR and 90 dB SFDR maintain EVM headroom for high-order QAM constellations, and the dual-channel sampling ensures I/Q timing skew is zero - critical for demodulation accuracy. The 25 Msps per channel comfortably covers wideband LTE, 5G NR sub-6 intermediate-frequency, and proprietary OFDM waveforms after baseband mixing. The 1.8 V operation also makes it natural to pair with modern baseband SoCs and FPGAs.
Được đề xuất
Digital Oscilloscope Front-End
The LTC2263IUJ-14 is a strong fit for two-channel digital-storage oscilloscope and digitizer front-ends requiring 14-bit amplitude resolution for high-fidelity waveform capture. Its 1.2 LSB RMS transition noise and ±0.3 LSB DNL support small-signal detail recovery in the presence of large dynamic-range inputs, and its dual channels enable simultaneous multi-probe acquisition. The serial LVDS output pairs directly with high-performance FPGAs that perform timebase triggering and deep-memory storage. Designers can scale to four channels by combining two LTC2263IUJ-14 ICs synchronized via a shared frame clock.
Được đề xuất
Medical Imaging Front-End
Ultrasound and other medical imaging front-ends require simultaneous multi-channel sampling of analog receive signals with high dynamic range and low noise. The LTC2263IUJ-14's two simultaneously-sampling 14-bit channels at 25 Msps, 1.2 LSB RMS noise, and 1.8 V operation support portable ultrasound probe electronics where power and channel density are constrained. Multiple devices can be time-interleaved for 8, 16, or 64-channel probe arrays, with each LTC2263 pair contributing one differential I/Q slice to the digital beamformer. Industrial temperature grade supports clinical and field-deployable imaging platforms.
Được đề xuất
Software Defined Radio (SDR)
Software-defined-radio platforms benefit from the LTC2263IUJ-14's dual simultaneous-sampling channels when capturing I/Q data streams from a quadrature demodulator or two antennas in a diversity configuration. Its 14-bit resolution and 73 dB SNR preserve the modulation fidelity needed for narrowband standards such as DVB, ISDB-T, and proprietary sub-GHz protocols, while the 1.8 V supply simplifies battery-powered portable SDR designs. The serial LVDS output reduces FPGA I/O pressure when multiple ADC pairs are aggregated, and exposed-pad QFN-40 packaging supports dense PCB layouts with good thermal dissipation.
Được đề xuất
Portable Test & Measurement
Portable and handheld test-and-measurement instruments - spectrum analyzers, RF probes, EMI receivers - require dense multi-channel digitization at low power. The LTC2263IUJ-14's 60 mW per channel dissipation and 1.8 V supply extend battery runtime while delivering 14-bit precision for amplitude-accurate measurements. Two channels fit into compact probes for differential voltage measurements or two-tone RF analysis. The exposed-pad QFN-40 package and industrial temperature range support field-deployed units that must operate in uncontrolled thermal environments while retaining full SNR and SFDR specifications.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2263IUJ-14 — 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 | LTC2263CUJ-14#PBF | LTC2264IUJ-14#PBF | LTC2265IUJ-14#PBF | LTC2260IUJ-12#PBF | LTC2262IUJ-12#PBF |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | 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 | 40-QFN (6x6) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 12 bit | 12 bit |
| Sample Rate | 25 Msps | 25 Msps | 40 Msps | 65 Msps | 105 Msps | 40 Msps |
| Number of Channels | 2 (simultaneous sampling) | 2 | 2 | 2 | 2 | 2 |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Output Interface | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
| Operating Temperature | -40°C to +85°C (I-grade) | 0°C to +70°C (C-grade) | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Bảo phân biệt quan trọng
- Dual simultaneous-sampling 14-bit channels at 25 Msps in a single 40-QFN (6x6) IC (vsLTC2258IUJ-14 (single-channel))
- 60 mW per channel power at 25 Msps (1.8 V single supply) (vsLTC2260IUJ-12 (12-bit 105 Msps cousin))
- Industry-standard serial LVDS output with 1-lane / 2-lane mode select (vsCMOS-parallel-output ADCs)
Ghi chú thiết kế
Use a multilayer PCB with an unbroken internal ground plane beneath the ADC for best noise performance. The QFN-40 exposed pad (pin 41) MUST be soldered to a low-impedance ground plane with multiple thermal vias to keep θJA near the 33°C/W rating. Decouple every AVDD pin with a 0.1 µF ceramic placed within 2-3 mm of the pin, plus a shared 10 µF bulk tantalum or polymer capacitor at the ADC supply node. Keep digital LVDS traces short and length-matched within the data-pair to maintain timing margins at 25 Msps.
Drive each analog input differentially (e.g., via a transformer or differential driver such as the LT6409) - single-ended drive significantly degrades SFDR and SNR. Provide a low-jitter, low-phase-noise differential clock to CLK+/CLK-; clock jitter of 1 ps RMS directly reduces SNR by approximately 2 dB at 12.5 MHz input. Do not exceed the absolute-maximum ratings of AVDD at 2.0 V or input common-mode outside the datasheet range, or the part will latch or suffer permanent damage. Ensure MODE, OF, and CS logic levels are stable at power-up.
Estimated total power dissipation at 25 Msps, both channels active, is approximately 120 mW with a 1.8 V supply. With QFN-40 θJA around 33°C/W, the junction temperature rise above ambient is approximately 4°C - well within the +85°C industrial limit. If both channels run at higher sample rates (via the LTC2264/LTC2265 drop-in upgrade), verify dissipation rises proportionally and re-confirm thermal margin. No external heatsink is required, but adequate airflow over the exposed pad region is recommended for sealed enclosures.
Place a 100 Ω differential termination resistor across each LVDS pair (DAO+/DAO-, DBO+/DBO-, DCO) as close to the FPGA receiver pins as possible to suppress reflections at 25 Msps DDR clock rates. Route CLK+/CLK- with controlled 100 Ω differential impedance and length-match within ±0.5 mm to the DCO/DAO/DBO lanes to avoid setup/hold violations. Keep ADC analog and digital ground regions separated until they meet at a single point under the exposed pad, or use a guard ring to isolate digital return currents from sensitive analog input pins.
Thông tin tuân thủ
RoHS/lead-free compliance confirmed by the #PBF suffix on the manufacturer part number; AEC-Q100 automotive qualification is not applicable for this industrial-grade ADC. REACH compliance per Analog Devices product declaration.