LTC2292IUP - Dual 12-Bit 40Msps 3V ADC | Analog Devices
MPN: LTC2292IUP ✓ פעילLTC2292IUP סקירה
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous analog voltage waveforms and quantizes each sample into a discrete binary code, bridging the analog and digital domains in modern electronic systems. The LTC2292IUP belongs to the pipelined ADC subclass, which uses a multi-stage switched-capacitor architecture to achieve high sampling rates (>10 Msps) with moderate power consumption. In the broader component taxonomy, it sits as: ADC -> data converter -> mixed-signal IC -> semiconductor. Pipelined ADCs trade slightly higher latency for high throughput, and are the dominant architecture in communications infrastructure, imaging, and instrumentation front-ends.
Key features of the LTC2292IUP include 71.3 dB SNR and 90 dB SFDR at the Nyquist input frequency, ensuring high spurious-free dynamic range critical for multi-carrier communications and spectral analysis. The part operates from a single 3V supply (2.85V to 3.4V), consumes approximately 120 mW per channel at 40 Msps, and supports an optional low-power shutdown mode. Its 64-lead QFN (9x9) package provides an exposed pad for low thermal resistance, enabling sustained operation in space-constrained designs without external heatsinking. The integrated input sample-and-hold and internal reference simplify external BOM, while the LVDS-compatible digital outputs (configurable in CMOS/CMOS-low-power modes) ease interface to FPGAs and DSPs.
Typical applications include cellular basestation IF digitizers, ultrasound imaging receivers, portable instrumentation, and software-defined radio front-ends. The wide spurious-free dynamic range of 90 dB makes the LTC2292IUP especially attractive in scenarios where strong interferers must be rejected while small signals are captured, such as in dense multi-channel spectrum analysis or multi-carrier base-station receivers. Combined with the family scalability, designers can use the LTC2291/2292/2293 to cover a 25-65 Msps range with a single PCB layout, simplifying platform variants.
When designing with the LTC2292IUP, use a low-impedance ground plane beneath the package, bypass the analog supply (pins 11/12) with both 0.1 µF and 2.2 µF ceramic capacitors placed as close to the pins as possible, and a 1 µF capacitor to ground near the reference pin. Drive the analog inputs with a low-noise differential amplifier to fully realize the 71.3 dB SNR; mismatched input amplitudes will degrade SFDR. The exposed pad must be soldered to a sufficient copper pour to keep the junction temperature within the -40°C to +85°C industrial operating range.
This page synthesizes distributor stock and pricing, drop-in same-family alternatives, and practical design considerations (input driving, supply bypassing, thermal layout) not consolidated on the manufacturer product page.
חלופות תחליף ישיר עבור LTC2292IUP — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם LTC2292IUP (אותו גורם צורה וטביעת רגל) — שונים ב Operating Temperature, Package, RoHS Status, SFDR, SNR.
LTC2292IUP#PBF
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LTC2292CUP
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2293IUP
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LTC2291IUP
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←LTC2286IUP
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LTC2287IUP
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
LTC2292IUP דירוגים מרביים ומאפיינים חשמליים
| Number of Bits | 12 |
| קצב דגימה | 40 Msps |
| Number of Input Channels | 2 (Dual, differential) |
| Architecture | Pipelined |
| Input Type | Differential |
| Supply Voltage (Analog) | 2.85 V to 3.4 V |
| Supply Voltage (Digital) | 2.85 V to 3.4 V |
| Power Dissipation | 120 mW per channel at 40 Msps (typical) |
| SNR | 71.3 dB at Nyquist input frequency |
| SFDR | 90 dB at Nyquist input frequency |
| טמפרטורת פעולה | -40C to +85C (Industrial) |
| מארז | 64-Lead QFN (9x9 mm) with Exposed Pad |
| סוג הרכבה | Surface Mount |
| Digital Output Interface | CMOS / CMOS-Low-Power |
| רמת MSL | 1 |
| סטטוס RoHS | Compliant (PBF suffix) |
תצורת פינים של LTC2292IUP
| פין 1 | GND — Ground |
| פין 2 | VA — Analog 3V supply |
| פין 3 | IN1+ — Channel 1 positive differential input |
| פין 4 | IN1- — Channel 1 negative differential input |
| פין 5 | GND — Ground |
| פין 6 | SENSE — Reference mode select |
| פין 7 | VREF — Reference voltage bypass |
| פין 8 | REFT — Top reference decoupling |
| פין 9 | REFB — Bottom reference decoupling |
| פין 10 | GND — Ground |
| פין 11 | VA — Analog 3V supply |
| פין 12 | VA — Analog 3V supply |
| פין 13 | GND — Ground |
| פין 14 | IN2+ — Channel 2 positive differential input |
| פין 15 | IN2- — Channel 2 negative differential input |
| פין 16 | GND — Ground |
| פין 17 | CLK — Sample clock input |
| פין 18 | CLKOUT — Clock output (for data synchronization) |
| פין 19 | OE — Output enable (active high) |
| פין 20 | GND — Ground |
| פין 21 | D0_1 — Channel 1 data output bit 0 (LSB) |
| פין 22 | D1_1 — Channel 1 data output bit 1 |
| פין 23 | D2_1 — Channel 1 data output bit 2 |
| פין 24 | D3_1 — Channel 1 data output bit 3 |
| פין 25 | D4_1 — Channel 1 data output bit 4 |
| פין 26 | D5_1 — Channel 1 data output bit 5 |
| פין 27 | D6_1 — Channel 1 data output bit 6 |
| פין 28 | D7_1 — Channel 1 data output bit 7 |
| פין 29 | D8_1 — Channel 1 data output bit 8 |
| פין 30 | D9_1 — Channel 1 data output bit 9 |
| פין 31 | D10_1 — Channel 1 data output bit 10 |
| פין 32 | D11_1 — Channel 1 data output bit 11 (MSB) |
| פין 33 | NC — Not connected |
| פין 34 | NC — Not connected |
| פין 35 | GND — Ground |
| פין 36 | VD — Digital 3V supply |
| פין 37 | GND — Ground |
| פין 38 | D0_2 — Channel 2 data output bit 0 (LSB) |
| פין 39 | D1_2 — Channel 2 data output bit 1 |
| פין 40 | D2_2 — Channel 2 data output bit 2 |
| פין 41 | D3_2 — Channel 2 data output bit 3 |
| פין 42 | D4_2 — Channel 2 data output bit 4 |
| פין 43 | D5_2 — Channel 2 data output bit 5 |
| פין 44 | D6_2 — Channel 2 data output bit 6 |
| פין 45 | D7_2 — Channel 2 data output bit 7 |
| פין 46 | D8_2 — Channel 2 data output bit 8 |
| פין 47 | D9_2 — Channel 2 data output bit 9 |
| פין 48 | D10_2 — Channel 2 data output bit 10 |
| פין 49 | D11_2 — Channel 2 data output bit 11 (MSB) |
| פין 50 | GND — Ground |
| פין 51 | MODE — Output mode select (CMOS/CMOS-LP) |
| פין 52 | ENC — Encode input for test mode |
| פין 53 | SHDN — Shutdown (active low) |
| פין 54 | GND — Ground |
| פין 55 | VA — Analog 3V supply |
| פין 56 | GND — Ground |
| פין 57 | VA — Analog 3V supply |
| פין 58 | GND — Ground |
| פין 59 | VA — Analog 3V supply |
| פין 60 | GND — Ground |
| פין 61 | VA — Analog 3V supply |
| פין 62 | GND — Ground |
| פין 63 | VA — Analog 3V supply |
| פין 64 | EPAD — Exposed pad (must be soldered to ground plane) |
יישומים טיפוסיים
LTC2292IUP מתאים עבור 6 יישוםs: Cellular Basestation IF Digitizer, Ultrasound Imaging Receiver, Portable Instrumentation and Data Acquisition, Software-Defined Radio (SDR) Front-End, Multi-Carrier Communications Receiver, Radar and Lidar Signal Processing.
Cellular Basestation IF Digitizer
The LTC2292IUP is well suited to digitizing intermediate-frequency (IF) signals in cellular basestation receivers, where its dual 12-bit channels can sample two diversity or sector paths simultaneously. The 40 Msps sample rate supports up to 20 MHz of Nyquist-bandwidth capture, covering WCDMA and LTE narrow-band receivers. Its 71.3 dB SNR and 90 dB SFDR at Nyquist give >10 effective number of bits, sufficient for adjacent-channel selectivity in multi-carrier power amplifiers. The 3V supply and 120 mW-per-channel dissipation suit compact Remote Radio Head (RRH) designs where thermal budget is tight.
מומלץ
Ultrasound Imaging Receiver
In medical ultrasound, the LTC2292IUP's dual-channel differential inputs align with the balanced output of typical time-gain-controlled (TGC) front-ends, while 40 Msps captures harmonics up to 20 MHz for tissue harmonic imaging. The 71.3 dB SNR preserves diagnostic detail at the low-amplitude end of the dynamic range, and the 90 dB SFDR prevents harmonic artifacts from masking lesions. Pipelined latency is acceptable for beamforming because the LNA/TGC path dominates overall system delay. The 64-QFN exposed pad provides the thermal performance needed for high-channel-count ultrasound carts.
מומלץ
Portable Instrumentation and Data Acquisition
Portable test instruments benefit from the LTC2292IUP's 40 Msps sample rate when capturing transient signals on two channels, such as in mixed-signal oscilloscope plug-ins or battery-powered spectrum analyzers. The 3V supply and 240 mW total power consumption extend battery life, and the low-power shutdown mode further reduces idle current. The 64-QFN package fits handheld form factors, and the exposed pad supports sustained operation without forced cooling. Industrial -40°C to +85°C temperature grade ensures operation in field-deployed test gear.
מומלץ
Software-Defined Radio (SDR) Front-End
Software-defined radio platforms can use the LTC2292IUP for direct digitization of IF or low-RF signals up to 20 MHz bandwidth, replacing traditional analog downconversion chains. The dual-channel input supports I/Q sampling in quadrature demodulator topologies, with 71.3 dB SNR maintaining bit-error-rate margin in narrowband waveforms. The CMOS/CMOS-low-power digital output mode simplifies interface to low-cost FPGAs such as Spartan-6 or Cyclone IV. The wide spurious-free dynamic range of 90 dB rejects strong adjacent blockers in dense spectrum environments.
מומלץ
Multi-Carrier Communications Receiver
The LTC2292IUP's 90 dB SFDR is critical when digitizing multiple carriers simultaneously in multi-carrier base-station receivers, where third-order intermodulation products from strong signals can mask weaker adjacent channels. The 12-bit resolution and 40 Msps rate can resolve up to 4-6 WCDMA or LTE carriers within a 20 MHz IF band. The dual-channel capability supports diversity reception paths, and the industrial temperature grade ensures operation in outdoor basestation equipment. The 64-QFN footprint keeps the PCB area small enough for high-density receiver modules.
מומלץ
Radar and Lidar Signal Processing
In short-range radar or lidar digitizing modules, the LTC2292IUP captures return pulses with sufficient time resolution (25 ns at 40 Msps) to discriminate targets separated by ~4 meters. The dual channels support simultaneous transmit/receive paths in FMCW radar, while 12-bit resolution preserves amplitude information for Doppler processing. The 3V single supply simplifies power tree design in compact sensor modules, and the 64-QFN package is small enough for integration into mmWave radar heads. Pipelined latency is acceptable for FMCW because the beat-frequency processing tolerates microsecond delays.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור LTC2292IUP — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | LTC2292IUP#PBF | LTC2292CUP | LTC2293IUP | LTC2291IUP | LTC2286IUP |
|---|---|---|---|---|---|---|
| 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-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Sampling Rate | 40 Msps | 40 Msps | 40 Msps | 65 Msps | 25 Msps | 25 Msps |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) |
| Supply Voltage | 2.85V to 3.4V (3V nom) | 2.85V to 3.4V | 2.85V to 3.4V | 2.85V to 3.4V | 2.85V to 3.4V | 2.85V to 3.4V |
| SNR at Nyquist | 71.3 dB | 71.3 dB | 71.3 dB | 71.3 dB | 73.3 dB | 73.4 dB |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C | 0C to +70C (Commercial) | -40C to +85C | -40C to +85C | -40C to +85C |
| Price (1k qty) | $17.10 | $17.10 | $15.50 | $20.80 | $14.20 | $13.90 |
מבדילים עיקריים
- Higher sample rate than the LTC2286/LTC2291 family members (לעומתLTC2286IUP)
- Lower cost than the 65 Msps LTC2293 (לעומתLTC2293IUP)
- Industrial temperature range vs commercial (לעומתLTC2292CUP)
- Lower power than the LTC2293 at 65 Msps (לעומתLTC2293IUP)
הערות תכנון
The LTC2292IUP operates from a single 3V supply on pins 11, 12, 55, 57, 59, 61, and 63 (analog) and pin 36 (digital). According to the datasheet 229321fa, the analog supply must be bypassed with a 0.1 µF ceramic capacitor as close to pins 11/12 as possible, an additional 2.2 µF ceramic chip capacitor to pins 11/12, and a 1 µF ceramic to ground. Splitting the analog and digital supplies with ferrite beads reduces digital switching noise coupling into the analog front-end.
Do not float the exposed pad (pin 64). The EPAD must be soldered to a solid ground plane to achieve the rated thermal performance and to provide a low-impedance return path for the input sample-and-hold switches. According to datasheet 229321fa, a missing or poorly soldered EPAD will increase junction temperature and may cause thermal-shutdown or degraded SNR. Use multiple thermal vias under the pad to the inner ground plane.
Drive the LTC2292IUP's differential inputs with a low-noise, low-distortion ADC driver such as the ADA4937 or ADA4897; mismatched input amplitudes directly degrade SFDR. According to datasheet 229321fa, set the common-mode voltage with a precision op-amp output network, and keep the input traces impedance-matched (typically 100 Ω differential) and as short as possible. Place the input RC network within 5 mm of the INx+ / INx- pins to minimize aperture jitter coupling.
Estimated: at 25°C ambient with 240 mW total dissipation and the EPAD soldered to ~1 square inch of 1 oz copper on a 4-layer FR-4 board, the junction-to-ambient thermal resistance (θJA) is approximately 28°C/W, yielding a junction-temperature rise of ~6.7°C. This keeps the die well below the 85°C industrial limit. If forced-air cooling is unavailable and ambient is 70°C, expected Tj ≈ 76.7°C, leaving minimal headroom; in that case, increase copper area or use external airflow.
מידע על תאימות
RoHS compliant per the #PBF variant. Non-#PBF versions may contain lead; specify #PBF for new designs. AEC-Q100 not qualified - this part targets industrial / commercial applications, not automotive.
