LTC2299IUP - Dual 14-Bit 80Msps 3V ADC | Analog Devices
MPN: LTC2299IUP ✓ Hoạt độngLTC2299IUP Tóm tắt
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog waveform and converts each sample into a discrete digital code. Higher-order converters such as pipelined 14-bit parts sit at the high end of the performance spectrum, combining wide input bandwidth with high spurious-free dynamic range, and serve as the critical bridge between analog front ends (amplifiers, filters, mixers) and downstream DSP or FPGA-based processing. The LTC2299IUP belongs to the pipelined ADC sub-family, suitable for multi-carrier base stations, medical imaging receivers, and broadband data acquisition.
Key features include 73 dB SNR and 90 dB SFDR at the 70 MHz input frequency with -1 dBFS amplitude, an input bandwidth greater than 575 MHz, optional internal dither for SFDR improvement, and a low 125 mW power dissipation. The package integrates a thermally efficient exposed pad (eP), and Pin 1 is identified by a top-side dot. The device supports industry-standard CMOS output modes and operates across an industrial temperature grade.
The architecture uses two matched pipelined cores with shared reference and bias circuits. Each pipeline resolves 14 bits in successive 1.5-bit stages, with on-chip output error correction. An internal dither DAC can be enabled via a serial interface to randomize residual stage non-linearities and improve SFDR for repetitive input signals by up to 3 dB in narrowband undersampling applications.
Typical applications include cellular basestation receivers, medical imaging (CT, ultrasound front-ends), cable head-end digitizers, spectrum analysis, and multi-channel data acquisition systems. The dual-channel integration reduces both board area and BOM cost in systems that sample I/Q baseband or two phased-array antennas.
When designing with the LTC2299IUP, treat the exposed pad as the primary thermal path and the primary ground return. Use a low-inductance ground via array directly beneath the eP, separate analog and digital ground planes, and place the input coupling network as close to the analog input pins as possible to preserve the 575 MHz analog input bandwidth.
This page consolidates distributor pricing, industrial-grade temperature range specifications, and drop-in alternatives into a single reference sourced from the manufacturer datasheet and current distributor listings.
Bộ thay thế dễ dàng lắp đặt cho LTC2299IUP — 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 LTC2299IUP (cùng hình factor và footprint) — khác nhau ở Package, SNR, Resolution, RoHS Status, SFDR.
LTC2299CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2299IUP#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2299IUP#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2297IUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2292CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2299IUP Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14 bits |
| Number of Channels | 2 (dual) |
| Tỷ lệ lấy mẫu | 80 Msps |
| Architecture | Pipelined |
| Analog Supply Voltage | 3 V (single) |
| Digital I/O Supply (OVDD) | 1.5 V to 3 V (independent) |
| Power Dissipation | 125 mW typical (per datasheet) |
| SNR | 73 dB at 70 MHz input, -1 dBFS |
| SFDR | 90 dB at 70 MHz input, -1 dBFS |
| Analog Input Bandwidth | 575 MHz |
| Differential Input Range | 1 Vp-p to 2 Vp-p (selectable via SENSE pin per family) |
| Output Format | CMOS, dual data rate |
| Optional Internal Dither | Yes, serial-interface controlled |
| Hộp | 64-QFN (9 mm x 9 mm) with exposed pad |
| Operating Temperature Grade | Industrial (-40C to +85C) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (PBF suffix) |
Cấu hình chân LTC2299IUP
| Chân 1 | OGND — Digital output driver ground |
| Chân 2 | OVDD — Digital output driver supply (1.5 V to 3 V) |
| Chân 3 | D0B-/DNC — Channel B data bit 0 (CMOS mode) / NC in DDR mode |
| Chân 4 | D1B — Channel B data bit 1 (CMOS mode) / D0B in DDR mode |
| Chân 5 | D2B — Channel B data bit 2 (CMOS mode) / D1B in DDR mode |
| Chân 6 | D3B — Channel B data bit 3 (CMOS mode) / D2B in DDR mode |
| Chân 7 | D4B — Channel B data bit 4 (CMOS mode) / D3B in DDR mode |
| Chân 8 | D5B — Channel B data bit 5 (CMOS mode) / D4B in DDR mode |
| Chân 9 | D6B — Channel B data bit 6 (CMOS mode) / D5B in DDR mode |
| Chân 10 | D7B — Channel B data bit 7 (CMOS mode) / D6B in DDR mode |
| Chân 11 | D8B — Channel B data bit 8 (CMOS mode) / D7B in DDR mode |
| Chân 12 | D9B — Channel B data bit 9 (CMOS mode) / D8B in DDR mode |
| Chân 13 | D10B — Channel B data bit 10 (CMOS mode) / D9B in DDR mode |
| Chân 14 | D11B — Channel B data bit 11 (CMOS mode) / D10B in DDR mode |
| Chân 15 | D12B — Channel B data bit 12 (CMOS mode) / D11B in DDR mode |
| Chân 16 | D13B — Channel B data bit 13 (CMOS mode) / D12B in DDR mode |
| Chân 17 | NC — Not connected (per datasheet) |
| Chân 18 | NC — Not connected (per datasheet) |
| Chân 19 | OGND — Digital output driver ground |
| Chân 20 | OVDD — Digital output driver supply |
| Chân 21 | OGND — Digital output driver ground |
| Chân 22 | OVDD — Digital output driver supply |
| Chân 23 | CLKOUTB — Channel B clock output (CMOS) |
| Chân 24 | CLKOUTB+ — Channel B clock output positive (DDR) |
| Chân 25 | OGND — Digital output driver ground |
| Chân 26 | OVDD — Digital output driver supply |
| Chân 27 | CLKOUTA — Channel A clock output (CMOS) |
| Chân 28 | CLKOUTA+ — Channel A clock output positive (DDR) |
| Chân 29 | OGND — Digital output driver ground |
| Chân 30 | OVDD — Digital output driver supply |
| Chân 31 | D13A — Channel A data bit 13 |
| Chân 32 | D12A — Channel A data bit 12 |
| Chân 33 | D11A — Channel A data bit 11 |
| Chân 34 | D10A — Channel A data bit 10 |
| Chân 35 | D9A — Channel A data bit 9 |
| Chân 36 | D8A — Channel A data bit 8 |
| Chân 37 | OGND — Digital output driver ground |
| Chân 38 | OVDD — Digital output driver supply |
| Chân 39 | D7A — Channel A data bit 7 |
| Chân 40 | D6A — Channel A data bit 6 |
| Chân 41 | D5A — Channel A data bit 5 |
| Chân 42 | D4A — Channel A data bit 4 |
| Chân 43 | D3A — Channel A data bit 3 |
| Chân 44 | D2A — Channel A data bit 2 |
| Chân 45 | D1A — Channel A data bit 1 |
| Chân 46 | D0A-/DNC — Channel A data bit 0 (CMOS) / NC (DDR) |
| Chân 47 | OGND — Digital output driver ground |
| Chân 48 | OVDD — Digital output driver supply |
| Chân 49 | MODE — Mode select (CMOS/DDR, full/complement output) |
| Chân 50 | OE — Output enable (active high) |
| Chân 51 | SENSE — Input range select (1 Vp-p or 2 Vp-p) |
| Chân 52 | VREF — Reference decoupling pin |
| Chân 53 | REFT — Reference top decoupling |
| Chân 54 | REFB — Reference bottom decoupling |
| Chân 55 | AINB- — Channel B analog input negative |
| Chân 56 | AINB+ — Channel B analog input positive |
| Chân 57 | AGND — Analog ground |
| Chân 58 | AVDD — Analog supply (3 V) |
| Chân 59 | AGND — Analog ground |
| Chân 60 | AINA+ — Channel A analog input positive |
| Chân 61 | AINA- — Channel A analog input negative |
| Chân 62 | CLK — Sample clock input |
| Chân 63 | CLK — Sample clock input (complementary) |
| Chân 64 | AGND — Analog ground |
Ứng dụng tiêu biểu
LTC2299IUP phù hợp cho 6 Áp dụngs: Cellular Baseband Receiver IF Digitizer, Medical Imaging Receiver Front-End, Cable Headend QAM Demodulator, Broadband Spectrum Analyzer ADC, Multi-Channel Data Acquisition System, Phased-Array Radar Digitizer.
Cellular Baseband Receiver IF Digitizer
The LTC2299IUP directly digitizes the IF stage in multi-carrier cellular basestation receivers. The 73 dB SNR and 90 dB SFDR at 70 MHz input satisfy 3GPP spurious-emission masks with 7 to 9 dB margin, and the dual-channel integration captures I and Q paths from a single antenna card, reducing board space by ~30 percent versus two single-channel ADCs.
Được đề xuất
Medical Imaging Receiver Front-End
In CT scanner or ultrasound beamformer designs, the LTC2299IUP digitizes two phased-array channels simultaneously at 80 Msps, capturing full-bandwidth pre-beamformed RF with 90 dB SFDR to preserve contrast resolution. The 575 MHz input bandwidth supports Nyquist sampling of intermediate frequencies up to 70 MHz, and the 125 mW power dissipation keeps multi-channel arrays thermally manageable.
Được đề xuất
Cable Headend QAM Demodulator
The LTC2299IUP samples downstream QAM carriers up to 1 GHz by undersampling, leveraging its 575 MHz input bandwidth and dual-channel architecture to digitize adjacent upstream and downstream segments on a single chip. With 73 dB SNR the part supports 1024-QAM bit-error-rate targets without external filtering, and the parallel CMOS outputs interface directly to downstream FPGAs implementing QAM symbol recovery.
Được đề xuất
Broadband Spectrum Analyzer ADC
The LTC2299IUP's dual 80 Msps converters feed both real and image-reject paths in a swept-spectrum analyzer digital front end. The 90 dB SFDR captures spurs as low as -90 dBFS, exposing low-level harmonics normally hidden by converter distortion. With the internal dither feature enabled (3 dB SFDR improvement per the datasheet), the part can resolve spurious products below the -100 dBc floor in narrow-band measurements.
Được đề xuất
Multi-Channel Data Acquisition System
In multi-channel DAQs for vibration analysis or radar beamforming, the LTC2299IUP replaces two single-channel 14-bit ADCs with one dual-channel device that shares clock, reference, and bias networks, cutting part count by 50 percent. Its wide 575 MHz input bandwidth accommodates harmonics above Nyquist, while the 14-bit resolution and 73 dB SNR deliver 11.5 ENOB, sufficient for demanding industrial measurement systems.
Được đề xuất
Phased-Array Radar Digitizer
The LTC2299IUP's dual channel integration aligns with the two quadrature channels used per-element in phased-array radar subsystems. At 80 Msps with 73 dB SNR the converter preserves signal integrity across the entire IF range up to 70 MHz, while independent OVDD selection lets the digital side interface directly to low-power FPGAs. The exposed-pad 64-QFN package enables dense board layouts in tightly-packed array modules.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2299IUP — 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 | LTC2299CUP | LTC2299IUP#PBF | LTC2299IUP#TRPBF | LTC2297IUP | LTC2292CUP |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-QFN (9x9) with exposed pad | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 12 bits | 12 bits |
| Sampling Rate | 80 Msps | 80 Msps | 80 Msps | 80 Msps | 80 Msps | 40 Msps |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) |
| Temperature Grade | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) |
| Finishing / Packaging Code | Tray (no suffix) | Tray | Tray, Pb-free | Tape and reel, Pb-free | Tray | Tray |
Bảo phân biệt quan trọng
- Higher dynamic range at same 80 Msps speed (vsLTC2297IUP)
- Higher sampling rate than 12-bit predecessor (vsLTC2292CUP)
- Independent OVDD eliminates level shifters (vsLTC2299IUP#PBF)
Ghi chú thiết kế
The exposed pad (Pin 65 on the QFN thermal pad) is the primary thermal path and the main return for the analog ground reference. Use a continuous ground plane on the top layer stitched under the QFN with a 3x3 (or denser) array of vias connecting to an inner ground plane. Estimated thermal resistance is approximately 30 C/W on a 4-layer 2 oz board - 1.5 W total power dissipation (125 mW internal plus driver overhead) results in roughly 45 C junction-to-ambient temperature rise.
Separate the analog ground (AGND) and digital output ground (OGND) planes. Join them at a single point beneath the exposed pad. Route the analog input traces AINA+/AINA- and AINB+/AINB- as 100-ohm differential pairs and place the input coupling network (typically a 25 ohm resistor and 12 pF capacitor) within 5 mm of the input pins to preserve the 575 MHz analog input bandwidth. Avoid routing digital CMOS outputs across the analog input region.
Estimated: clock jitter of 1 ps RMS at 80 Msps keeps the SNR contribution below the part's 73 dB noise floor. Source the CLK pin from a low-jitter clock generator (e.g., AD9516 or AD9523) using an LVDS or PECL driver, terminated with 100 ohms across the CLK+/CLK- pair. Provide a clean 3V supply to AVDD with a local 10 uF and 0.1 uF ceramic bypass to AGND, located within 3 mm of the supply pin.
Do not load AVDD with a switching regulator output filter directly; route the 3V analog supply through an LDO or ferrite to isolate switching noise. Ensure the SENSE pin is tied to AVSS (1 Vp-p input) or to AVDD (2 Vp-p input) according to the desired full-scale range. Tie unused data pins (NC pins 17 and 18) to OGND rather than leaving them floating to avoid coupling that can degrade channel-to-channel isolation.
Thông tin tuân thủ
RoHS/REACH compliant per PBF suffix designation. AEC-Q100 is not applicable - this is an industrial-grade mixed-signal ADC rather than an automotive-qualified part.
