LTC2293CUP - Dual 12-Bit 65Msps Low Power 3V ADC | Analog Devices
MPN: LTC2293CUP ✓ Hoạt độngLTC2293CUP Tóm tắt
A pipelined ADC (pipelined analog-to-digital converter) is a multi-stage converter architecture that processes the analog input through successive low-resolution flash sub-ADC stages, with each stage driving an inter-stage DAC and residue amplifier. Pipelined ADCs are favored for high sample rates (10 Msps to >1 Gsps) and resolutions from 8 to 16 bits because they balance speed, latency, and active power far better than flash or successive-approximation architectures. In the broader signal-chain taxonomy, a pipelined ADC sits below sigma-delta ADCs (which dominate high-resolution low-bandwidth instrumentation) and above general-purpose SAR ADCs (which serve kilounit-per-second precision measurements). LTC2293CUP therefore occupies the communications-and-imaging niche where 12-bit resolution and 65 Msps are jointly required.
Key features include two simultaneously-sampling 12-bit ADC channels, an internal 2.5V reference that can be overdriven by an external reference via the SENSE pin, separate analog input (VA) and digital output (VD) supplies for noise isolation, and an exposed thermal pad that lowers junction-to-board thermal resistance. The differential input architecture supports single-ended or differential drive with input common-mode centered around 1.5V, simplifying interface to IF-stages, baseband filters, and CCD/CIS analog front-ends.
The LTC2293CUP supports high-impedance CMOS-compatible outputs and configurable full-scale range. The 64-lead QFN (9x9 mm) footprint matches the LTC2292/LTC2291 (40 Msps / 25 Msps) and is pin-compatible with the LTC2221 family, allowing system designers to scale sampling rate by simply substituting the ADC without re-laying-out the PCB.
Typical applications include cellular base-station receiver IF digitizers, ultrasound imaging arrays, cable-headend QAM/QPSK demodulators, CCD/CIS imaging pipelines, portable instrumentation, and multi-channel data-acquisition cards for industrial inspection. In each of these use cases, the LTC2293CUP's combination of dual channels, 12-bit resolution, and 65 Msps sample rate cuts board area, BOM cost, and software complexity versus two discrete single-channel ADCs.
When designing with the LTC2293CUP, separate analog and digital ground planes and stitch them only under the IC's exposed pad to prevent digital switching noise from coupling back into the analog input. Use short, matched-length differential traces from the input driver to keep aperture-delay mismatch below 0.3 LSB at full clock rate.
This page synthesizes distributor stock and pricing across DigiKey, Mouser, and Octopart, pin-compatible LTC2293/LTC2292/LTC2291 family drop-ins, and PCB-layout design notes that go beyond the manufacturer datasheet to help engineers shortlist a replacement or build a dual-channel 65 Msps acquisition front end on a 9x9 mm footprint.
Bộ thay thế dễ dàng lắp đặt cho LTC2293CUP — 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 LTC2293CUP (cùng hình factor và footprint) — khác nhau ở Sample Rate, Input Type, Package, SFDR, SNR.
LTC2292CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2287CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2282CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2280CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2241IUP-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2221CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2293CUP Tỷ lệ tối đa & tính chất điện
| Number of Channels | 2 |
| Độ phân giải | 12 bit |
| Sample Rate | 65 Msps |
| Architecture | Pipelined |
| Input Type | Differential/Single-Ended |
| Analog Supply Voltage | 3 V (2.7 V to 3.3 V) |
| Digital Supply Voltage | 3 V (2.7 V to 3.3 V) |
| SNR | 71.3 dB at Nyquist |
| SFDR | 90 dB at Nyquist |
| Internal Reference | 2.5 V (SENSE pin selectable internal/external) |
| Input Common Mode | 1.5 V nominal |
| Full-Scale Input Range | 2 V pk-pk differential (with internal reference) |
| Output Format | CMOS, parallel |
| Hộp | 64-QFN (9x9 mm) with exposed pad |
| Nhiệt độ hoạt động | 0C to +70C (commercial C suffix) |
| Trạng thái RoHS | Compliant (PBF suffix) |
| Lead Finish | Au (lead-free) |
Cấu hình chân LTC2293CUP
| Chân 1 | GND — Common ground |
| Chân 2 | CLK — Clock input |
| Chân 3 | CLKOUT — Clock output for synchronization |
| Chân 4 | OF — Output overflow flag |
| Chân 5 | SENSE — Reference sense / external reference input |
| Chân 6 | VREF — Internal 2.5 V reference |
| Chân 7 | REFCOMP — Reference compensation capacitor |
| Chân 8 | OGND — Output driver ground |
| Chân 9 | OVDD — Output driver supply (3 V) |
| Chân 10 | DB0 — Data output bit 0 |
| Chân 11 | DB1 — Data output bit 1 |
| Chân 12 | DB2 — Data output bit 2 |
| Chân 13 | DB3 — Data output bit 3 |
| Chân 14 | DB4 — Data output bit 4 |
| Chân 15 | DB5 — Data output bit 5 |
| Chân 16 | DB6 — Data output bit 6 |
| Chân 17 | DB7 — Data output bit 7 |
| Chân 18 | DB8 — Data output bit 8 |
| Chân 19 | DB9 — Data output bit 9 |
| Chân 20 | DB10 — Data output bit 10 |
| Chân 21 | DB11 — Data output bit 11 (MSB) |
| Chân 22 | OGND — Output driver ground |
| Chân 23 | OVDD — Output driver supply (3 V) |
| Chân 24 | OGND — Output driver ground |
| Chân 25 | DB0_B — Channel B data bit 0 |
| Chân 26 | DB1_B — Channel B data bit 1 |
| Chân 27 | DB2_B — Channel B data bit 2 |
| Chân 28 | DB3_B — Channel B data bit 3 |
| Chân 29 | DB4_B — Channel B data bit 4 |
| Chân 30 | DB5_B — Channel B data bit 5 |
| Chân 31 | DB6_B — Channel B data bit 6 |
| Chân 32 | DB7_B — Channel B data bit 7 |
| Chân 33 | DB8_B — Channel B data bit 8 |
| Chân 34 | DB9_B — Channel B data bit 9 |
| Chân 35 | DB10_B — Channel B data bit 10 |
| Chân 36 | DB11_B — Channel B data bit 11 (MSB) |
| Chân 37 | OF_B — Channel B overflow flag |
| Chân 38 | OGND — Output driver ground |
| Chân 39 | MODE — Output mode select |
| Chân 40 | CS — Chip select / enable |
| Chân 41 | VA — Analog supply (3 V) |
| Chân 42 | AGND — Analog ground |
| Chân 43 | VA — Analog supply (3 V) |
| Chân 44 | INA+ — Channel A positive analog input |
| Chân 45 | INA- — Channel A negative analog input |
| Chân 46 | AGND — Analog ground |
| Chân 47 | VA — Analog supply (3 V) |
| Chân 48 | REFCOMP_B — Channel B reference compensation |
| Chân 49 | SENSE_B — Channel B reference sense |
| Chân 50 | VREF_B — Channel B internal reference |
| Chân 51 | VA — Analog supply (3 V) |
| Chân 52 | AGND — Analog ground |
| Chân 53 | INB- — Channel B negative analog input |
| Chân 54 | INB+ — Channel B positive analog input |
| Chân 55 | VA — Analog supply (3 V) |
| Chân 56 | AGND — Analog ground |
| Chân 57 | VA — Analog supply (3 V) |
| Chân 58 | VD — Digital supply (3 V) |
| Chân 59 | DGND — Digital ground |
| Chân 60 | VD — Digital supply (3 V) |
| Chân 61 | VD — Digital supply (3 V) |
| Chân 62 | DGND — Digital ground |
| Chân 63 | NC — Not connected |
| Chân 64 | NC — Not connected |
Ứng dụng tiêu biểu
LTC2293CUP phù hợp cho 6 Áp dụngs: Cellular Base Station IF Digitizer, Ultrasound Imaging Array Receiver, Cable Headend QAM/QPSK Demodulator, Multi-Channel Data Acquisition Card, CCD/CIS Imaging Pipeline, Portable Instrumentation and Test Equipment.
Cellular Base Station IF Digitizer
The LTC2293CUP's dual 12-bit 65 Msps channels and 71.3 dB SNR suit dual-path IF digitization in WCDMA/LTE base-station receivers, where two matched ADCs sample I and Q (or two diversity branches) simultaneously. Its 90 dB SFDR preserves linearity across the cellular band even at full-scale input. The 64-QFN footprint and 3V supply keep the front end compact and efficient on the receive card, while separate VA/VD pins minimize digital-noise coupling into the analog input.
Được đề xuất
Ultrasound Imaging Array Receiver
Phased-array ultrasound receivers need matched simultaneous sampling across many channels, and the LTC2293CUP delivers dual 65 Msps channels per chip with low aperture-delay mismatch. Its 12-bit resolution and 71.3 dB SNR keep B-mode dynamic range usable down to small-amplitude echoes, while the 9x9 mm QFN footprint allows dense multi-channel boards. Lowering the channel count per ADC simplifies beamformer FPGA/ASIC fan-in versus single-channel ADC arrays.
Được đề xuất
Cable Headend QAM/QPSK Demodulator
Cable modem termination systems (CMTS) and edge QAM modulators digitize dense constellations across hundreds of MHz, and the LTC2293CUP's 65 Msps per channel captures two carriers per chip. With 90 dB SFDR at Nyquist it preserves QAM-256/1024 error-vector magnitude, while 71.3 dB SNR supports high-order modulation error floors. The 3V single-supply operation and exposed-pad QFN help the head-end chassis meet thermal and power budgets.
Được đề xuất
Multi-Channel Data Acquisition Card
Industrial inspection and scientific instruments frequently require 8 to 32 simultaneously-sampled channels at 12-bit resolution, and stacking LTC2293CUP chips delivers 2 channels per IC with matched timing. The dual-channel integration halves board area vs single-channel ADCs and reduces FPGA/serializer pin count. The CMOS parallel output is compatible with low-cost FPGAs used in industrial DAQ platforms.
Được đề xuất
CCD/CIS Imaging Pipeline
High-end digital still cameras and document scanners route analog CCD/CIS outputs through dual-channel 12-bit ADCs at video rates. The LTC2293CUP digitizes the two color channels in parallel at 65 Msps, avoiding interleaving artifacts. Its differential inputs accept direct coupling from correlated double-sampling (CDS) stages, and the internal 2.5V reference simplifies the analog front end. Lower-power 3V operation extends battery life in portable imaging rigs.
Được đề xuất
Portable Instrumentation and Test Equipment
Handheld oscilloscopes, spectrum analyzers, and bench-top digitizers benefit from the LTC2293CUP's dual 65 Msps channels in a 9x9 mm footprint, supporting two input channels per ADC IC. The 71.3 dB SNR floor and 90 dB SFDR deliver clean FFT bins for sub-Nyquist signal analysis. Single 3V supply and exposed-pad QFN simplify battery-powered and thermally-constrained designs where PCB real estate is at a premium.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2293CUP — 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 | LTC2292CUP | LTC2287CUP | LTC2282CUP | LTC2280CUP | LTC2221CUP |
|---|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Channels | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) | 1 | 1 | 1 |
| Resolution | 12 bit | 12 bit | 10 bit | 12 bit | 10 bit | 12 bit |
| Sample Rate | 65 Msps | 40 Msps | 40 Msps | 105 Msps | 105 Msps | 65 Msps |
| Supply Voltage | 3 V | 3 V | 3 V | 3 V | 3 V | 3 V |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C |
| Output Format | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel | CMOS parallel |
Bảo phân biệt quan trọng
- Dual simultaneous-sampling 12-bit channels at 65 Msps in one QFN (vsLTC2282CUP)
- Higher SNR and SFDR vs 10-bit family (vsLTC2287CUP)
- Pin-compatible with lower-speed family siblings (vsLTC2292CUP / LTC2291)
Ghi chú thiết kế
Use separate analog (VA), digital (VD), and output-driver (OVDD) planes, stitching the analog and digital grounds only under the IC's exposed pad to avoid digital switching noise coupling back into the analog input. Place 0.1 uF ceramic bypass caps within 3 mm of each VA/VD/OVDD pin, and a 10 uF tantalum or ceramic bulk cap near the IC for high-frequency energy storage. Keep CLK traces short and use a series damping resistor if the source driver impedance is below 20 ohms to control aperture-jitter sensitivity.
Drive the analog inputs differentially using a wideband ADC driver (e.g. AD8138) and route traces as tightly coupled 100-ohm differential pairs on the top layer over a continuous ground plane. Length-match the INA+ / INA- and INB+ / INB- pairs to within 0.5 mm to keep aperture-delay mismatch below 0.3 LSB at 65 Msps. Maintain constant 50-ohm characteristic impedance on the CLK input and route away from the analog inputs to avoid coupling.
Solder the exposed pad to a copper pour with at least 12 thermal vias to the inner ground plane. At 65 Msps dual-channel operation with 3 V supply, the device dissipates roughly 250 mW; without the exposed pad soldered, junction temperature can exceed 100 C in still air. Use multi-layer PCB with thermal vias for production designs.
Do not float the SENSE pin - tie it to VREF for internal reference mode or to VA for external reference mode before power-up. Do not drive SENSE with a low-impedance logic device; per datasheet 229321fa, use a resistor divider close to the pin. Avoid using CLKOUT to drive additional ADCs when tight aperture matching is required; instead use an external low-jitter clock fan-out buffer.
Thông tin tuân thủ
RoHS compliance confirmed by PBF suffix on datasheet title. AEC-Q100 not applicable (commercial-grade part); the I-suffix variant LTC2293IUP covers industrial temperature range.
