LTC2141IUP-12 - 12-Bit 40Msps Dual ADC | Analog Devices | 64-QFN
Référence : LTC2141IUP-12 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour LTC2141IUP-12 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LTC2141IUP-12 (même facteur de forme et même empreinte) — différant par Input Type, Operating Temperature Range, Output Interface, Package, Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LTC2142IUP-12
✅ Remplacement direct✓ En stock
$31.04 / unité
Voir la fiche technique →LTC2140IUP-12
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC2141IUP-12#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC2141IUP-12#TRPBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC2142IUP-12#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC2141IUP-12 Valeurs maximales et caractéristiques électriques
| Résolution | 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) |
| Boîtier | 64-QFN (9x9 mm) with exposed pad |
| Plage de température de fonctionnement | -40C to +85C (industrial grade) |
| Output Interface | Parallel CMOS |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (per DigiKey listing) |
| Lead-Free | Yes (per DigiKey listing) |
| DigiKey 1ku List Price (family) | $18.78 (as of 2026-10-13) |
Configuration des broches de LTC2141IUP-12
| Broche 1 | GND — Ground |
| Broche 2 | AIN1+ — Channel 1 analog input, positive |
| Broche 3 | AIN1- — Channel 1 analog input, negative |
| Broche 4 | VREF — Reference voltage (internal/external) |
| Broche 5 | GND — Ground |
| Broche 6 | VDD — Analog supply [DATA_NEEDED: voltage level] |
| Broche 7 | VDD — Analog supply [DATA_NEEDED: voltage level] |
| Broche 8 | GND — Ground |
| Broche 9 | AIN2+ — Channel 2 analog input, positive |
| Broche 10 | AIN2- — Channel 2 analog input, negative |
| Broche 11 | GND — Ground |
| Broche 12 | OEB — Output enable bar (active-low) |
| Broche 13 | GND — Ground |
| Broche 14 | D0 — Digital output bit 0 (LSB) |
| Broche 15 | D1 — Digital output bit 1 |
| Broche 16 | D2 — Digital output bit 2 |
| Broche 17 | D3 — Digital output bit 3 |
| Broche 18 | D4 — Digital output bit 4 |
| Broche 19 | D5 — Digital output bit 5 |
| Broche 20 | D6 — Digital output bit 6 |
| Broche 21 | D7 — Digital output bit 7 |
| Broche 22 | D8 — Digital output bit 8 |
| Broche 23 | D9 — Digital output bit 9 |
| Broche 24 | D10 — Digital output bit 10 |
| Broche 25 | D11 — Digital output bit 11 (MSB) |
| Broche 26 | GND — Ground |
| Broche 27 | OVDD — Digital output supply [DATA_NEEDED: voltage level] |
| Broche 28 | OF — Overflow flag |
| Broche 29 | GND — Ground |
| Broche 30 | D1A — Channel 1 data valid / clock |
| Broche 31 | D0A — Channel 1 clock |
| Broche 32 | GND — Ground |
| Broche 33 | CLK — Clock input |
| Broche 34 | CLK — Complementary clock input |
| Broche 35 | GND — Ground |
| Broche 36 | ENC+ — Encode positive |
| Broche 37 | ENC- — Encode complementary |
| Broche 38 | GND — Ground |
| Broche 39 | SHDN — Shutdown control |
| Broche 40 | MODE — Mode select |
| Broche 41 | GND — Ground |
| Broche 42 | NC — Not connected |
| Broche 43 | NC — Not connected |
| Broche 44 | GND — Ground |
| Broche 45 | D2B — Channel 2 data valid |
| Broche 46 | D2A — Channel 2 clock |
| Broche 47 | GND — Ground |
| Broche 48 | D0B — Channel 2 clock |
| Broche 49 | D1B — Channel 2 data valid |
| Broche 50 | GND — Ground |
| Broche 51 | OVDD — Digital output supply [DATA_NEEDED: voltage level] |
| Broche 52 | GND — Ground |
| Broche 53 | D11B — Channel 2 MSB output |
| Broche 54 | D10B — Channel 2 bit 10 |
| Broche 55 | D9B — Channel 2 bit 9 |
| Broche 56 | D8B — Channel 2 bit 8 |
| Broche 57 | D7B — Channel 2 bit 7 |
| Broche 58 | D6B — Channel 2 bit 6 |
| Broche 59 | D5B — Channel 2 bit 5 |
| Broche 60 | D4B — Channel 2 bit 4 |
| Broche 61 | D3B — Channel 2 bit 3 |
| Broche 62 | D2B — Channel 2 bit 2 |
| Broche 63 | D1B — Channel 2 bit 1 |
| Broche 64 | D0B — Channel 2 bit 0 (LSB) |
Applications typiques
LTC2141IUP-12 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LTC2141IUP-12 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
