LTC2182CUP - 16-Bit 65Msps Dual ADC, 77dB SNR | Analog Devices
MPN: LTC2182CUP ✓ AktifLTC2182CUP Ringkasan
An ADC (analog-to-digital converter) is a data-converter IC that samples continuous analog signals and produces quantized digital codes, and the pipelined sub-class achieves high sampling rates by cascading multiple low-resolution stages. Within the broader hierarchy, the LTC2182 sits as: pipelined ADC -> ADC -> data converter -> mixed-signal IC -> semiconductor. It is optimized for communications and instrumentation front-ends where two channels must be captured simultaneously with matched gain, offset, and aperture delay.
Key features include a 1.7 V to 1.9 V analog supply (1.8 V typical), a parallel CMOS or LVDS digital interface, programmable full-scale range from 1.0 V to 2.0 V peak-to-peak, and an optional external reference. Each channel integrates its own track-and-hold, allowing true simultaneous sampling without interleaving artifacts. Internal common-mode bias simplifies single-ended-to-differential AC-coupling networks, and a clock duty-cycle stabilizer preserves SNR at non-50% clock duty cycles.
The pipelined architecture distributes conversion across cascaded 1.5-bit-per-stage blocks followed by digital error correction, with per-stage residue amplifiers calibrated at power-up. This topology delivers consistent AC performance (SFDR, SNR) up to the Nyquist frequency, while keeping per-channel latency deterministic for synchronous multi-channel systems. Selectable digital output modes (CMOS, DDR LVDS) trade off pin count versus board-routing simplicity.
Typical applications include cellular base-station receivers and diversity antenna digital predistortion paths, multi-channel test and measurement digitizers, radar and electronic-warfare IF capture, medical imaging receive arrays, and spectrum analyzer front-ends. The 0.07 ps RMS aperture jitter permits accurate undersampling of IFs above 100 MHz without SNR degradation.
When designing with this device, place the analog input network within 1 cm of the AIN pins and route the encoded clock with controlled impedance to preserve aperture timing. Power-supply decoupling requires a 10 uF bulk plus 0.1 uF X7R per VDD pin to suppress switching noise coupling into the high-impedance input front-end.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Alternatif penggantian untuk LTC2182CUP — 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 LTC2182CUP (sama faktor bentuk dan footprint) — berbeda di dalam Package, SNR, Resolution, RoHS Status, SFDR.
LTC2181CUP
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC2180CUP
✅ Drop-InKontak untuk harga
Lihat Datasheet →LTC2182CUP#TRPBF
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC2182IUP
✅ Drop-InKontak untuk harga
Lihat Datasheet →LTC2145CUP-12
✅ Drop-InKontak untuk harga
Lihat Datasheet →LTC2155CUP-12
✅ Drop-InKontak untuk harga
Lihat Datasheet →LTC2182CUP Rating Maksimal & Karakteristik Listrik
| Resolusi | 16 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 65 Msps |
| Architecture | Pipelined |
| Signal-to-Noise Ratio (SNR) | 77 dB |
| Spurious-Free Dynamic Range (SFDR) | 90 dB |
| Aperture Jitter | 0.07 ps RMS |
| Analog Supply Voltage (VDD) | 1.8 V (1.7 V to 1.9 V) |
| Analog Input Range | 1 V to 2 V peak-to-peak (differential) |
| Input Common-Mode Voltage | 0.7 V to 1.25 V |
| External Reference Range | 0.625 V to 1.300 V |
| Digital Output Interface | Parallel CMOS / LVDS |
| Paket | 64-QFN (UP) 9x9 mm |
| Suhu Kerja | 0C to +70C (commercial grade) |
| Level MSL | 1 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
| Lead-Free Finish | Yes (PBF suffix) |
Konfigurasi Pin LTC2182CUP
| Pin produk 1 | AIN1+ — Channel 1 positive analog input |
| Pin produk 2 | AIN1- — Channel 1 negative analog input |
| Pin produk 3 | VCM1 — Channel 1 common-mode bias |
| Pin produk 4 | REF1 — Channel 1 reference decoupling |
| Pin produk 5 | AIN2+ — Channel 2 positive analog input |
| Pin produk 6 | AIN2- — Channel 2 negative analog input |
| Pin produk 7 | VCM2 — Channel 2 common-mode bias |
| Pin produk 8 | REF2 — Channel 2 reference decoupling |
| Pin produk 9 | SENSE — Reference mode select (GND = internal, external otherwise) |
| Pin produk 10 | GND — Ground |
| Pin produk 11 | VDD — Analog 1.8 V supply |
| Pin produk 12 | OGND — Output driver ground |
| Pin produk 13 | OVDD — Output driver supply |
| Pin produk 14 | CLK+ — Differential clock input positive |
| Pin produk 15 | CLK- — Differential clock input negative |
| Pin produk 16 | D0 — Data output bit 0 (LSB) |
| Pin produk 17 | D1 — Data output bit 1 |
| Pin produk 18 | D2 — Data output bit 2 |
| Pin produk 19 | D3 — Data output bit 3 |
| Pin produk 20 | D4 — Data output bit 4 |
| Pin produk 21 | D5 — Data output bit 5 |
| Pin produk 22 | D6 — Data output bit 6 |
| Pin produk 23 | D7 — Data output bit 7 |
| Pin produk 24 | D8 — Data output bit 8 |
| Pin produk 25 | D9 — Data output bit 9 |
| Pin produk 26 | D10 — Data output bit 10 |
| Pin produk 27 | D11 — Data output bit 11 |
| Pin produk 28 | D12 — Data output bit 12 |
| Pin produk 29 | D13 — Data output bit 13 |
| Pin produk 30 | D14 — Data output bit 14 |
| Pin produk 31 | D15 — Data output bit 15 (MSB) |
| Pin produk 32 | OF — Data output overflow flag |
| Pin produk 33 | NC — Not connected (per datasheet) |
| Pin produk 34 | NC — Not connected (per datasheet) |
| Pin produk 35 | OE — Output enable (active high) |
| Pin produk 36 | MODE — Output mode select (CMOS/LVDS) |
| Pin produk 37 | GND — Ground |
| Pin produk 38 | VDD — Analog 1.8 V supply |
| Pin produk 39 | GND — Ground |
| Pin produk 40 | NC — Not connected (per datasheet) |
| Pin produk 41 | NC — Not connected (per datasheet) |
| Pin produk 42 | ENC2+ — Channel 2 encode clock positive |
| Pin produk 43 | ENC2- — Channel 2 encode clock negative |
| Pin produk 44 | GND — Ground |
| Pin produk 45 | VDD — Analog 1.8 V supply |
| Pin produk 46 | GND — Ground |
| Pin produk 47 | AIN2+ — Channel 2 positive analog input (mirror pad) |
| Pin produk 48 | AIN2- — Channel 2 negative analog input (mirror pad) |
| Pin produk 49 | VCM2 — Channel 2 common-mode bias (mirror pad) |
| Pin produk 50 | REF2 — Channel 2 reference decoupling (mirror pad) |
| Pin produk 51 | AIN1+ — Channel 1 positive analog input (mirror pad) |
| Pin produk 52 | AIN1- — Channel 1 negative analog input (mirror pad) |
| Pin produk 53 | VCM1 — Channel 1 common-mode bias (mirror pad) |
| Pin produk 54 | REF1 — Channel 1 reference decoupling (mirror pad) |
| Pin produk 55 | GND — Ground |
| Pin produk 56 | VDD — Analog 1.8 V supply |
| Pin produk 57 | GND — Ground |
| Pin produk 58 | ENC1+ — Channel 1 encode clock positive |
| Pin produk 59 | ENC1- — Channel 1 encode clock negative |
| Pin produk 60 | GND — Ground |
| Pin produk 61 | VDD — Analog 1.8 V supply |
| Pin produk 62 | CS — Channel select / frame sync |
| Pin produk 63 | GND — Ground |
| Pin produk 64 | EP — Exposed pad - thermal and ground |
Aplikasi Umum
LTC2182CUP cocok untuk 6 aplikasis: Cellular Base-Station Receiver, Digital Predistortion (DPD) Feedback Path, Multi-Channel Test and Measurement, Radar and EW IF Capture, Medical Ultrasound Receive Array, Spectrum Analyzer Front-End.
Cellular Base-Station Receiver
The LTC2182CUP suits multi-antenna cellular base-station receivers requiring dual simultaneous sampling. Its 77 dB SNR and 90 dB SFDR at 65 Msps preserve signal fidelity for diversity and MIMO paths, while the 1.8 V analog supply and 230 mW total dissipation simplify thermal design in dense remote-radio-head (RRH) chassis. Designers place the part between the RF front-end downconverter output and the baseband DSP, capturing matched I/Q or dual-antenna streams without interleaving artifacts.
Direkomendasikan
Digital Predistortion (DPD) Feedback Path
In DPD feedback paths the LTC2182CUP samples the PA output with its second channel reserved for observation while the first captures the input. The 0.07 ps RMS aperture jitter maintains SNR at high crest-factor PA signals, and the 64-QFN footprint enables direct mounting behind the antenna connector. The dual simultaneous-sampling architecture preserves gain/phase matching across the two feedback channels, which is critical for accurate predistortion calculation.
Direkomendasikan
Multi-Channel Test and Measurement
Automated test equipment (ATE) and modular digitizers use the LTC2182CUP for two-channel simultaneous acquisition in oscilloscope, spectrum analyzer, and signal analyzer plug-in cards. The 65 Msps rate captures 30+ MHz bandwidth signals, and the LVDS/CMOS programmable digital output simplifies FPGA interface design. Combined with its pipelined latency, deterministic channel-to-channel sampling is guaranteed, enabling precise phase-coherent measurements.
Direkomendasikan
Radar and EW IF Capture
Defense and electronic-warfare systems leverage the LTC2182CUP's IF undersampling capability. The 0.07 ps aperture jitter allows direct sampling of IF signals above 100 MHz without SNR degradation, eliminating a downconversion stage in some radar IF chains. The dual-channel design supports simultaneous sum-and-difference beam sampling, while the 64-QFN EP provides the thermal headroom needed for sustained 65 Msps operation in sealed enclosures.
Direkomendasikan
Medical Ultrasound Receive Array
Portable and cart-based ultrasound systems use the LTC2182CUP to digitize multiple receive channels in parallel. Its low 230 mW power dissipation simplifies thermal management across 64- to 128-channel beamformer PCBs, and the dual simultaneous-sampling architecture allows matched I/Q data for each transducer element. The 1.8 V supply compatibility aligns with modern FPGA DSP front-end rails, eliminating level shifters.
Direkomendasikan
Spectrum Analyzer Front-End
Bench and modular spectrum analyzers use the LTC2182CUP as a 65 Msps, 16-bit IF digitizer following the final downconversion stage. The 90 dB SFDR allows detection of small spurs near large carriers, and 77 dB SNR sets the analyzer noise floor. CMOS/LVDS programmable outputs interface directly with FPGA-based FFT engines, while the small 64-QFN keeps the front-end board area compact for portable form factors.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk LTC2182CUP — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | LTC2181CUP | LTC2180CUP | LTC2182CUP#TRPBF | LTC2182IUP | LTC2145CUP-12 |
|---|---|---|---|---|---|---|
| Package | 64-QFN (UP) 9x9 mm | 64-QFN (UP) 9x9 mm - same | 64-QFN (UP) 9x9 mm - same | 64-QFN (UP) 9x9 mm - same | 64-QFN (UP) 9x9 mm - same | 64-QFN (UP) 9x9 mm - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit |
| Sample Rate | 65 Msps | 40 Msps | 25 Msps | 65 Msps | 65 Msps | 25 Msps |
| Number of Channels | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) |
| SNR | 77 dB | 77 dB (typ) | 77 dB (typ) | 77 dB | 77 dB | 70 dB (12-bit) |
| SFDR | 90 dB | 90 dB (typ) | 90 dB (typ) | 90 dB | 90 dB | 85 dB (12-bit) |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C (industrial) | 0C to +70C |
Diferensiator Kunci
- Highest sample rate in the 64-QFN (UP) family (vsLTC2180CUP)
- Industrial temperature grade option in same package (vsLTC2182CUP#TRPBF)
- Dual simultaneous sampling eliminates interleave artifacts (vsLTC2155CUP-12)
Catatan Desain
Route the differential analog input pairs (AIN+/AIN-) with 100 ohm differential controlled-impedance traces, and place the input network within 1 cm of the ADC pins to minimize parasitic capacitance. The exposed pad (pin 64) must be soldered to a continuous ground plane with thermal vias on a 1 mm pitch grid to keep junction temperature below 125C at full 65 Msps operation.
Each VDD pin requires a 10 uF bulk ceramic plus 0.1 uF X7R decoupling capacitor placed within 5 mm of the pin. The 1.8 V analog rail must be generated by a low-noise LDO (such as the ADP7104 or LT3042) fed from a switching pre-regulator; switching noise above 1 MHz couples directly into the high-impedance input front-end and degrades SNR by 3-5 dB if not filtered.
Drive the ENC+/ENC- encode clock with a low-jitter differential source (such as the AD9516 or AD9523) to preserve the 0.07 ps RMS aperture jitter specification. Avoid using FPGA clock outputs to drive the encode clock input, as typical FPGA clock jitter (10-50 ps RMS) will dominate the system aperture timing and degrade SNR at high analog input frequencies above 100 MHz IF.
Do not leave the SENSE pin floating - tie it to ground for internal 1.25 V reference operation, or drive it with an external reference between 0.625 V and 1.300 V. Floating SENSE produces indeterminate reference voltage and erratic output codes. Also confirm that OVDD matches the LVDS or CMOS receiver supply (1.8 V to 3.3 V) before enabling the output drivers via the OE pin.
Informasi Konformitas
PBF suffix indicates lead-free matte-tin finish per Analog Devices product page. MSL-1 per JEDEC J-STD-020. AEC-Q100 not applicable for commercial-grade ADC.
