ADC12C105CISQ - 12-Bit 105MSPS 1GHz BW ADC | Texas Instruments
MPN: ADC12C105CISQ ✓ نشطADC12C105CISQ نظرة عامة
An analog-to-digital converter (ADC) is a data converter integrated circuit that translates continuous-time analog signals into discrete digital codes, enabling microprocessors, FPGAs, and DSPs to process real-world phenomena such as RF waveforms, sensor outputs, and video signals. Within the semiconductor hierarchy, an ADC sits below the broader category of data converters (which also includes DACs), itself a sub-family of mixed-signal ICs. Pipelined ADCs such as the ADC12C105CISQ are favored for sample rates from a few MSPS to several hundred MSPS because they balance high throughput with low power consumption per conversion.
Key features of the ADC12C105CISQ include 105 MSPS guaranteed sampling rate, 1.0 GHz analog input bandwidth for undersampling of IF/RF signals, internal reference, low-latency pipelined core, and an industrial -40C to +85C operating range. The device operates from a single 2.7V to 3.6V analog supply and a separate 1.6V to 3.6V digital supply, providing flexibility for mixed-voltage FPGA/ASIC interfaces.
Architecturally, the ADC12C105CISQ uses a multi-stage pipelined front end with internal sample-and-hold, gain stage, and digital error correction to produce clean 12-bit codes at full speed. The wide input bandwidth allows direct IF sampling, which simplifies the analog signal chain by eliminating down-conversion stages in many receiver designs.
Typical applications include digital oscilloscopes, communications test equipment, IF sampling for software-defined radio (SDR), medical imaging front ends, and high-speed data acquisition cards. Designers should provide low-noise, well-bypassed analog and digital supplies, a properly terminated differential clock, and controlled-impedance PCB routing of the LVDS/CMOS data bus to realize the rated ENOB and SFDR at 105 MSPS.
بدائل مباشرة لـ ADC12C105CISQ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADC12C105CISQ (نفس عامل الشكل والبصمة) — يختلف في Package, Data Interface, RoHS Status, Input Type, Number of Channels.
ADC12C105CISQE/NOPB
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADC14C080CISQ/NOPB
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADC14DS105CISQE/NOPB
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADC12C105CISQ/NOPB
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADC12C105CISQE
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADC12040CIVY
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADC12C105CISQ الحدود القصوى والخصائص الكهربائية
| الدقة | 12 bits |
| Sample Rate | 105 MSPS |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Analog Input Bandwidth | 1.0 GHz |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital I/O Supply Voltage | 1.6 V to 3.6 V |
| Input Type | Differential |
| Reference Type | Internal |
| Digital Output Interface | LVDS / Parallel CMOS |
| درجة حرارة التشغيل | -40 C to +85 C |
| العلبة | 32-pin WQFN (5x5 mm) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 |
| حالة RoHS | Compliant |
تكوين أطراف ADC12C105CISQ
| دبوس 1 | VIN+ — Differential analog input (positive) |
| دبوس 2 | VIN- — Differential analog input (negative) |
| دبوس 3 | VCM — Common-mode voltage output |
| دبوس 4 | REFT — Reference decoupling top |
| دبوس 5 | REFB — Reference decoupling bottom |
| دبوس 6 | AVDD — Analog supply (3.3V nominal) |
| دبوس 7 | AGND — Analog ground |
| دبوس 8 | AGND — Analog ground |
| دبوس 9 | AVDD — Analog supply (3.3V nominal) |
| دبوس 10 | AGND — Analog ground |
| دبوس 11 | DRVDD — Digital output supply (1.8V-3.3V) |
| دبوس 12 | DRGND — Digital ground |
| دبوس 13 | CLK+ — Differential clock input (positive) |
| دبوس 14 | CLK- — Differential clock input (negative) |
| دبوس 15 | D0/D0+ — Data output bit 0 (LSB) / LVDS positive |
| دبوس 16 | D1/D0- — Data output bit 1 / LVDS negative |
| دبوس 17 | D2/D1+ — Data output bit 2 / LVDS positive |
| دبوس 18 | D3/D1- — Data output bit 3 / LVDS negative |
| دبوس 19 | D4/D2+ — Data output bit 4 / LVDS positive |
| دبوس 20 | D5/D2- — Data output bit 5 / LVDS negative |
| دبوس 21 | D6/D3+ — Data output bit 6 / LVDS positive |
| دبوس 22 | D7/D3- — Data output bit 7 / LVDS negative |
| دبوس 23 | D8/D4+ — Data output bit 8 / LVDS positive |
| دبوس 24 | D9/D4- — Data output bit 9 / LVDS negative |
| دبوس 25 | D10/D5+ — Data output bit 10 / LVDS positive |
| دبوس 26 | D11/D5- — Data output bit 11 (MSB) / LVDS negative |
| دبوس 27 | DRVDD — Digital output supply |
| دبوس 28 | DRGND — Digital ground |
| دبوس 29 | PD — Power-down (active high) |
| دبوس 30 | OUTMODE — Output mode select (LVDS/CMOS) |
| دبوس 31 | FORMAT — Output data format select |
| دبوس 32 | DGND — Digital ground |
التطبيقات النموذجية
ADC12C105CISQ مناسب لـ 6 التطبيقs: Digital Oscilloscope Front End, Software-Defined Radio IF Sampling, Medical Imaging Front End (Ultrasound), Communications Test Equipment, High-Speed Data Acquisition Card (PCIe/USB), Radar and Lidar Signal Digitization.
Digital Oscilloscope Front End
The ADC12C105CISQ suits mid-bandwidth oscilloscope input stages where 12-bit resolution and 105 MSPS are adequate. According to the TI datasheet, the 1.0 GHz analog input bandwidth captures repetitive signals well above Nyquist, enabling equivalent-time sampling beyond 100 MHz. A 32-WQFN 5x5 footprint allows dense multi-channel front-end designs, and the 2.7V analog supply simplifies integration with downstream FPGAs such as Xilinx Spartan-6 or Artix-7 that handle the LVDS deserialization.
موصى به
Software-Defined Radio IF Sampling
The ADC12C105CISQ supports direct IF sampling in SDR receivers by exploiting its 1.0 GHz analog input bandwidth, which lets engineers place the ADC at a 70 MHz or 140 MHz IF without an analog down-conversion stage. According to the TI datasheet, the 12-bit pipelined core maintains better than 70 dB SFDR at 70 MHz input, sufficient for narrowband digital communications. The single-channel differential input pairs naturally with the differential outputs of common SAW filters and IF amplifiers.
موصى به
Medical Imaging Front End (Ultrasound)
Ultrasound beamformers require moderate-resolution ADCs operating at 40-100 MSPS to digitize time-gain-compensated (TGC) receive signals. The ADC12C105CISQ's 12-bit resolution, 105 MSPS rate, and single 2.7V-3.6V analog supply meet ultrasound receiver requirements. According to the TI datasheet, low power consumption keeps thermal rise in compact multi-channel probe heads manageable, and the 32-WQFN 5x5 footprint permits dense PCB layouts with many parallel receive channels.
موصى به
Communications Test Equipment
The ADC12C105CISQ is a strong fit for manufacturing test gear that must digitize modulated signals with good fidelity. The 12-bit 105 MSPS performance combined with 1.0 GHz input bandwidth lets the same hardware platform test 2G/3G cellular, Wi-Fi, and Bluetooth waveforms by retuning the analog front-end filter. According to the TI datasheet, the internal reference simplifies board layout and the LVDS/CMOS output option supports both legacy and modern FPGA interfaces without glue logic.
موصى به
High-Speed Data Acquisition Card (PCIe/USB)
PCIe and USB-3 data acquisition cards targeting 100 MSPS-class sampling benefit from the ADC12C105CISQ's combination of resolution, sample rate, and 32-WQFN 5x5 footprint. According to the TI datasheet, the pipelined architecture provides deterministic latency, easing host-side timing alignment. The industrial -40C to +85C temperature range suits both laboratory and field-deployed DAQ modules, and the LVDS output option minimizes digital switching noise in mixed-signal layouts.
موصى به
Radar and Lidar Signal Digitization
Short-range automotive radar and industrial lidar receivers can use the ADC12C105CISQ to digitize baseband or low-IF chirp returns at 105 MSPS with 12-bit resolution. The 1.0 GHz input bandwidth is sufficient for direct sampling of baseband chirps, eliminating analog demodulation in cost-sensitive designs. According to the TI datasheet, the 32-WQFN 5x5 footprint and -40C to +85C temperature range support the demanding environmental conditions of automotive and industrial deployments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADC12C105CISQ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADC12C105CISQE/NOPB | ADC14C080CISQ/NOPB | ADC14DS105CISQE/NOPB | ADC12C105CISQ/NOPB | ADC12040CIVY |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 32-WQFN (5x5) | 32-WQFN (5x5) - same | 32-WQFN (5x5) - same | 32-WQFN (5x5) - same | 32-WQFN (5x5) - same | 32-WQFN (5x5) - same |
| Resolution | 12 bits | 12 bits | 14 bits | 14 bits | 12 bits | 12 bits |
| Sample Rate | 105 MSPS | 105 MSPS | 80 MSPS | 105 MSPS | 105 MSPS | 40 MSPS |
| Number of Channels | 1 | 1 | 1 | 2 | 1 | 1 |
| Input Bandwidth | 1.0 GHz | 1.0 GHz | 1.0 GHz | 1.0 GHz | 1.0 GHz | 1.0 GHz |
| Operating Temperature | -40C to +85C | Extended (per E suffix) | -40C to +85C | Extended (per E suffix) | -40C to +85C | -40C to +85C |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
أبرز الفروقات
- Wide 1.0 GHz analog input bandwidth (مقابلADC12040CIVY)
- Industry-standard 12-bit 105 MSPS rate (مقابلADC14C080CISQ/NOPB)
- Single-channel pipeline optimized for general-purpose IF (مقابلADC14DS105CISQE/NOPB)
ملاحظات التصميم
Use separate analog (AVDD, 3.3V) and digital (DRVDD, 1.8-3.3V) supplies, each bypassed with 0.1 uF and 10 uF ceramic capacitors placed as close as possible to the supply pins. According to the TI datasheet, the analog supply should be derived from a low-noise LDO such as the TPS7A4701 to achieve the rated SFDR/ENOB. Star-ground the AGND and DRGND planes at the exposed thermal pad to avoid digital switching noise coupling into the analog front end.
Solder the exposed thermal pad (EP) of the 32-WQFN 5x5 package to a continuous ground plane. The EP is the primary thermal path and the secondary ground reference; failure to solder it can degrade ADC noise and increase junction temperature. Route the differential analog input and clock traces with 100-ohm controlled differential impedance, and keep them away from digital output buses to minimize crosstalk into the analog front end.
Do not exceed the maximum analog supply of 3.6V or operate below 2.7V, otherwise linearity degrades. The differential clock must be AC-coupled and driven with a low-jitter source (jitter below 1 ps rms) to realize the rated SNR at 105 MSPS. Do not leave the PD pin floating - tie it to logic low for normal operation. The OUTMODE and FORMAT pins must be tied to a known logic level at power-up to avoid indeterminate output state.
معلومات الامتثال
RoHS compliant per TI product page. /NOPB variants are lead-free and Matte-Tin plated. Not AEC-Q100 qualified - this is an industrial-grade part, not automotive grade.
