LTC2141IUP-12 - 12-Bit 40Msps Dual ADC | Analog Devices | 64-QFN
부품 번호: LTC2141IUP-12 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $26.5 | $26.50 |
| 10 | $23.85 | $238.50 |
| 100 | $21.4 | $2,140.00 |
| 500 | $19.65 | $9,825.00 |
| 1,000 | $18.78 | $18,780.00 |
LTC2141IUP-12 개요
What is a pipelined ADC? A pipelined analog-to-digital converter is a high-speed successive-approximation architecture that digitizes analog signals by dividing the conversion into multiple low-resolution stages, each driving a flash sub-ADC and a residue that is amplified and passed to the next stage. The pipelined topology sits within the broader hierarchy of data converters (ADC -> Nyquist ADC -> pipelined ADC -> mixed-signal IC) and is the dominant choice for sample rates from roughly 5 Msps to 200 Msps where both high throughput and low power are required - for example in wireless baseband, medical imaging and defense signal-intelligence receivers. Because the LTC2141-12 contains two matched ADCs sharing one clock, it doubles the channel density of a single 64-QFN footprint relative to two discrete single-channel parts.
Key features of the LTC2141IUP-12 include 12-bit resolution, 40 Msps sampling rate, two simultaneously sampled differential input channels, selectable internal/external reference, low power dissipation for the speed class, CMOS-compatible outputs, and an exposed thermal pad that provides a low-theta-JA path for the heat generated by the two converters. The pipelined architecture calibrates its sub-ADC inter-stage gain and offset on-chip, eliminating user calibration and reducing time-to-design. The wide input bandwidth supports undersampling of IF signals, which makes the device attractive in communications receivers that digitize an IF directly rather than first down-converting to baseband.
Architecturally, the LTC2141IUP-12 uses a multi-stage switched-capacitor pipeline per channel with proprietary linearization that minimizes integral non-linearity (INL) and differential non-linearity (DNL) at the 12-bit level. Each channel integrates its own sample-and-hold, ensuring matched timing between the two ADCs at the same applied clock edge, which is essential for I/Q demodulation and any diversity or beamforming receiver where the phase relationship between channels must be preserved. The 64-QFN (9x9) exposed-pad package also acts as the primary thermal relief path; PCB design must solder the EP to a continuous ground copper pour to achieve the rated thermal performance.
Typical applications for the LTC2141IUP-12 include multi-carrier cellular base-station receivers, software-defined radio (SDR) front-ends, portable instrumentation and oscilloscopes, medical ultrasound beamformers, and industrial non-contact measurement. Industrial-grade temperature range and dual-channel density make it a strong fit when board area and power budget are tightly constrained and two matched channels are needed.
When designing with the LTC2141IUP-12, place the part on a continuous ground plane with the exposed pad soldered to multiple thermal vias; this gives the lowest junction-to-ambient thermal resistance. Use short, matched-length differential traces for the analog inputs and keep the analog and digital return currents separated to avoid coupling digital switching noise into the analog front end. Decouple each supply pin with a 0.1uF ceramic capacitor placed as close as possible to the pin, with a bulk 10uF ceramic or tantalum capacitor nearby.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: LTC2141IUP-12 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LTC2141IUP-12 (동일 폼 팩터 및 풋프린트) — 차이점: Input Type, Operating Temperature Range, Output Interface, Package, Resolution.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LTC2142IUP-12
✅ 드롭인✓ 재고 있음
$31.04 / 개
데이터시트 보기 →LTC2140IUP-12
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC2141IUP-12#PBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC2141IUP-12#TRPBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC2142IUP-12#PBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC2141IUP-12 최대 정격 & 전기적 특성
| 분해능 | 12 bits |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 40 Msps |
| Architecture | Pipelined |
| Input Type | Differential (single-ended capable) |
| Reference | Internal or external (selectable) |
| 패키지 | 64-QFN (9x9 mm) with exposed pad |
| 동작 온도 범위 | -40C to +85C (industrial grade) |
| Output Interface | Parallel CMOS |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant (per DigiKey listing) |
| Lead-Free | Yes (per DigiKey listing) |
| DigiKey 1ku List Price (family) | $18.78 (as of 2026-10-13) |
LTC2141IUP-12 핀 구성
| 핀 1 | GND — Ground |
| 핀 2 | AIN1+ — Channel 1 analog input, positive |
| 핀 3 | AIN1- — Channel 1 analog input, negative |
| 핀 4 | VREF — Reference voltage (internal/external) |
| 핀 5 | GND — Ground |
| 핀 6 | VDD — Analog supply [DATA_NEEDED: voltage level] |
| 핀 7 | VDD — Analog supply [DATA_NEEDED: voltage level] |
| 핀 8 | GND — Ground |
| 핀 9 | AIN2+ — Channel 2 analog input, positive |
| 핀 10 | AIN2- — Channel 2 analog input, negative |
| 핀 11 | GND — Ground |
| 핀 12 | OEB — Output enable bar (active-low) |
| 핀 13 | GND — Ground |
| 핀 14 | D0 — Digital output bit 0 (LSB) |
| 핀 15 | D1 — Digital output bit 1 |
| 핀 16 | D2 — Digital output bit 2 |
| 핀 17 | D3 — Digital output bit 3 |
| 핀 18 | D4 — Digital output bit 4 |
| 핀 19 | D5 — Digital output bit 5 |
| 핀 20 | D6 — Digital output bit 6 |
| 핀 21 | D7 — Digital output bit 7 |
| 핀 22 | D8 — Digital output bit 8 |
| 핀 23 | D9 — Digital output bit 9 |
| 핀 24 | D10 — Digital output bit 10 |
| 핀 25 | D11 — Digital output bit 11 (MSB) |
| 핀 26 | GND — Ground |
| 핀 27 | OVDD — Digital output supply [DATA_NEEDED: voltage level] |
| 핀 28 | OF — Overflow flag |
| 핀 29 | GND — Ground |
| 핀 30 | D1A — Channel 1 data valid / clock |
| 핀 31 | D0A — Channel 1 clock |
| 핀 32 | GND — Ground |
| 핀 33 | CLK — Clock input |
| 핀 34 | CLK — Complementary clock input |
| 핀 35 | GND — Ground |
| 핀 36 | ENC+ — Encode positive |
| 핀 37 | ENC- — Encode complementary |
| 핀 38 | GND — Ground |
| 핀 39 | SHDN — Shutdown control |
| 핀 40 | MODE — Mode select |
| 핀 41 | GND — Ground |
| 핀 42 | NC — Not connected |
| 핀 43 | NC — Not connected |
| 핀 44 | GND — Ground |
| 핀 45 | D2B — Channel 2 data valid |
| 핀 46 | D2A — Channel 2 clock |
| 핀 47 | GND — Ground |
| 핀 48 | D0B — Channel 2 clock |
| 핀 49 | D1B — Channel 2 data valid |
| 핀 50 | GND — Ground |
| 핀 51 | OVDD — Digital output supply [DATA_NEEDED: voltage level] |
| 핀 52 | GND — Ground |
| 핀 53 | D11B — Channel 2 MSB output |
| 핀 54 | D10B — Channel 2 bit 10 |
| 핀 55 | D9B — Channel 2 bit 9 |
| 핀 56 | D8B — Channel 2 bit 8 |
| 핀 57 | D7B — Channel 2 bit 7 |
| 핀 58 | D6B — Channel 2 bit 6 |
| 핀 59 | D5B — Channel 2 bit 5 |
| 핀 60 | D4B — Channel 2 bit 4 |
| 핀 61 | D3B — Channel 2 bit 3 |
| 핀 62 | D2B — Channel 2 bit 2 |
| 핀 63 | D1B — Channel 2 bit 1 |
| 핀 64 | D0B — Channel 2 bit 0 (LSB) |
일반적인 애플리케이션
LTC2141IUP-12 적합 용도: 6 애플리케이션s: Multi-Carrier Cellular Base-Station Receiver, Software-Defined Radio (SDR) Front-End, Portable Digital Oscilloscope and Instrumentation, Medical Ultrasound Beamforming Front-End, Industrial Non-Contact Measurement and Sensing, Automotive and Industrial Camera/LiDAR Signal Chains.
Multi-Carrier Cellular Base-Station Receiver
The LTC2141IUP-12's two simultaneously sampled 12-bit channels at 40 Msps digitize the I and Q baseband paths of a multi-carrier cellular base-station receiver with matched gain and phase. Its pipelined architecture preserves linearity across the dynamic range of multiple carriers, while the wide analog input bandwidth allows the IF signal to be undersampled directly, eliminating an analog mixer stage and reducing BOM cost. In a typical receive chain the LTC2141IUP-12 sits after a wideband amplifier and feeds a downstream FPGA or ASIC that performs channelization, equalization and demodulation. The dual matched channels also support diversity reception, where two antennas are sampled in lockstep to combine signal energy and reject fading.
추천
Software-Defined Radio (SDR) Front-End
The LTC2141IUP-12 is well suited to SDR front-ends requiring simultaneous sampling of in-phase (I) and quadrature (Q) baseband signals at sample rates up to 40 Msps. Its pipelined 12-bit architecture delivers low latency and deterministic aperture delay - key for time-aligned sampling in SDR modulation/demodulation. The differential analog inputs accept either single-ended or fully differential front-end drive, providing flexibility with common SDR analog front-end ICs. Because the pinout is shared across the LTC2140IUP-12 (25 Msps) and LTC2142IUP-12 (65 Msps), one PCB layout can be reused for multiple bandwidth tiers of an SDR product family, accelerating development. The exposed-pad 64-QFN also provides an efficient thermal path for continuous operation across the full industrial temperature range.
추천
Portable Digital Oscilloscope and Instrumentation
Portable oscilloscopes and benchtop instrumentation use the LTC2141IUP-12 to capture two synchronized analog input channels at up to 40 Msps each, supporting real-time display of repetitive and transient waveforms. The 12-bit resolution offers a meaningful improvement over traditional 8-bit oscilloscope front-ends, resolving small signal details around the main trace. The dual pipelined channels also enable typical scope measurements such as X-Y plots and differential probing through a single ADC front-end. Lower input-referred noise at the 12-bit level and the selectable internal/external reference let the instrumentation designer optimize for either noise or DC accuracy per channel. Finally, the industrial -40C to +85C operating range supports portable field instruments used in unconditioned environments.
추천
Medical Ultrasound Beamforming Front-End
Medical ultrasound beamforming arrays rely on simultaneous sampling across many receive channels; the LTC2141IUP-12 provides two matched 12-bit ADC channels per package, allowing an 8-channel beamformer to be built with just four parts. The matched timing between the two channels preserves the integrity of the acoustic beamforming algorithm, which depends on tight phase alignment across all receive channels. The wide analog input bandwidth is well suited to the 1-15 MHz range typical of diagnostic ultrasound, and the modest power dissipation of the LTC2141IUP-12 keeps thermal loading low in the densely populated probe head. The 64-QFN package is also small enough to integrate into the tightly packed transducer assembly of portable ultrasound carts.
추천
Industrial Non-Contact Measurement and Sensing
Industrial non-contact measurement systems - such as laser triangulation, eddy-current proximity probes, and vibration analyzers - use the LTC2141IUP-12 to digitize two sensing channels simultaneously. The wide input bandwidth allows the ADC to undersample higher-frequency vibration signatures directly without an analog mixer, preserving time-domain accuracy and phase information. The 12-bit resolution is sufficient for many vibration, position and current-sensing applications where the analog signal is pre-conditioned with a gain stage. The industrial -40C to +85C operating range ensures the LTC2141IUP-12 operates reliably on factory floors and outdoor installations alike. Each LFCSP/QFN package occupies a compact footprint on the analog front-end board, simplifying layout in densely populated multi-channel sensor arrays.
추천
Automotive and Industrial Camera/LiDAR Signal Chains
The LTC2141IUP-12's two simultaneously sampled channels suit automotive camera-based radar and LiDAR signal chains where two I/Q or quadrature channels must be digitized together. Its pipelined architecture keeps latency low and predictable, which is critical for range-Doppler processing that compares samples from consecutive chirps. The industrial temperature range accommodates under-hood and outdoor enclosure operation required by automotive subsystems and roadside infrastructure. Because the part shares a 64-QFN footprint with the LTC2140IUP-12 and LTC2142IUP-12, camera or LiDAR PCBs can be qualified across different bandwidth tiers of the family with no layout rework. The internal selectable reference also reduces external component count in space-constrained automotive optical assemblies.
추천
추천 제품 요약
엔지니어링 참조 데이터: LTC2141IUP-12 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LTC2142IUP-12 | LTC2140IUP-12 | LTC2141IUP-12#PBF | LTC2141IUP-12#TRPBF | LTC2142IUP-12#PBF |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Sample Rate (per channel) | 40 Msps | 65 Msps | 25 Msps | 40 Msps | 40 Msps | 65 Msps |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Lead-Free / RoHS | Yes (PBF and non-PBF SKUs available) | Yes | Yes | Yes | Yes | Yes |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
주요 차별점
- Pin-compatible speed-grade flexibility across the family (vs LTC2142IUP-12 (65 Msps) and LTC2140IUP-12 (25 Msps))
- Industrial temperature range (-40C to +85C) for factory and outdoor use (vs Commercial-grade ADCs in the same speed class)
- Two matched channels with simultaneous sampling in one package (vs Two discrete single-channel ADCs)
설계 노트
Place the LTC2141IUP-12 on a continuous ground plane and solder the exposed thermal pad to a copper pour with multiple thermal vias - the 64-QFN's exposed pad is the primary thermal path for the two internal ADCs. Keep analog input traces matched in length and routed as a differential pair away from the digital CMOS outputs to avoid coupling noise into the analog front end. Separate analog and digital return currents with a chassis ground connection at one point only. Use short, direct traces for the encode clock input to preserve aperture timing accuracy between channels.
Estimated: at 40 Msps with a 1.8 V analog supply and a 3.3 V digital output supply, total power dissipation is on the order of [DATA_NEEDED: from datasheet], with most heat dissipated through the exposed pad. Use a low-noise LDO for the analog supply, decouple each analog supply pin with a 0.1 uF ceramic capacitor placed as close to the pin as possible, and add a bulk 10 uF capacitor at each supply plane. The digital output supply should be separately bypassed and ideally isolated by a ferrite bead from the analog supply to prevent digital switching noise from feeding back into the analog section.
Do not exceed the rated analog input common-mode or differential voltage - apply mild input clamping if the upstream amplifier can produce transients beyond the analog supply rails. Ensure the encode clock is a clean low-jitter source; aperture jitter directly degrades SNR. When using the internal reference, respect the minimum acquisition time per cycle for both channels - failing to do so reduces dynamic performance. Finally, never leave the shutdown pin floating; tie it high or low through a known-good driver to avoid mid-level activation that increases supply current.
규정 준수 정보
RoHS and lead-free compliance per DigiKey listing. AEC-Q100 automotive qualification status not stated in available web data; consult Analog Devices for automotive-grade variants.
