LTC2292IUP - Dual 12-Bit 40Msps 3V ADC | Analog Devices
料号： LTC2292IUP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $22.5 | $22.50 |
| 10 | $21.42 | $214.20 |
| 100 | $19.95 | $1,995.00 |
| 500 | $18.4 | $9,200.00 |
| 1,000 | $17.1 | $17,100.00 |
LTC2292IUP 概述
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.
直接替换替代料： LTC2292IUP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LTC2292IUP （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, RoHS Status, SFDR, SNR.
快速对比工具——选择替代料号进行并排对比：
LTC2292IUP#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2292CUP
✅ 直接替换✓ 有现货
$13.42 / 个
查看数据手册 →LTC2293IUP
✅ 直接替换📋 参考替代料（不在目录中）
LTC2291IUP
✅ 直接替换✓ 有现货
$13.3 / 个
查看数据手册 →LTC2286IUP
✅ 直接替换📋 参考替代料（不在目录中）
LTC2287IUP
✅ 直接替换📋 参考替代料（不在目录中）
LTC2292IUP 最大额定值与电气特性
| Number of Bits | 12 |
| 采样率 | 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 |
| 工作温度 | -40C to +85C (Industrial) |
| 封装 | 64-Lead QFN (9x9 mm) with Exposed Pad |
| 安装类型 | Surface Mount |
| Digital Output Interface | CMOS / CMOS-Low-Power |
| MSL 等级 | 1 |
| RoHS 状态 | Compliant (PBF suffix) |
LTC2292IUP 引脚配置
| 引脚 1 | GND — Ground |
| 引脚 2 | VA — Analog 3V supply |
| 引脚 3 | IN1+ — Channel 1 positive differential input |
| 引脚 4 | IN1- — Channel 1 negative differential input |
| 引脚 5 | GND — Ground |
| 引脚 6 | SENSE — Reference mode select |
| 引脚 7 | VREF — Reference voltage bypass |
| 引脚 8 | REFT — Top reference decoupling |
| 引脚 9 | REFB — Bottom reference decoupling |
| 引脚 10 | GND — Ground |
| 引脚 11 | VA — Analog 3V supply |
| 引脚 12 | VA — Analog 3V supply |
| 引脚 13 | GND — Ground |
| 引脚 14 | IN2+ — Channel 2 positive differential input |
| 引脚 15 | IN2- — Channel 2 negative differential input |
| 引脚 16 | GND — Ground |
| 引脚 17 | CLK — Sample clock input |
| 引脚 18 | CLKOUT — Clock output (for data synchronization) |
| 引脚 19 | OE — Output enable (active high) |
| 引脚 20 | GND — Ground |
| 引脚 21 | D0_1 — Channel 1 data output bit 0 (LSB) |
| 引脚 22 | D1_1 — Channel 1 data output bit 1 |
| 引脚 23 | D2_1 — Channel 1 data output bit 2 |
| 引脚 24 | D3_1 — Channel 1 data output bit 3 |
| 引脚 25 | D4_1 — Channel 1 data output bit 4 |
| 引脚 26 | D5_1 — Channel 1 data output bit 5 |
| 引脚 27 | D6_1 — Channel 1 data output bit 6 |
| 引脚 28 | D7_1 — Channel 1 data output bit 7 |
| 引脚 29 | D8_1 — Channel 1 data output bit 8 |
| 引脚 30 | D9_1 — Channel 1 data output bit 9 |
| 引脚 31 | D10_1 — Channel 1 data output bit 10 |
| 引脚 32 | D11_1 — Channel 1 data output bit 11 (MSB) |
| 引脚 33 | NC — Not connected |
| 引脚 34 | NC — Not connected |
| 引脚 35 | GND — Ground |
| 引脚 36 | VD — Digital 3V supply |
| 引脚 37 | GND — Ground |
| 引脚 38 | D0_2 — Channel 2 data output bit 0 (LSB) |
| 引脚 39 | D1_2 — Channel 2 data output bit 1 |
| 引脚 40 | D2_2 — Channel 2 data output bit 2 |
| 引脚 41 | D3_2 — Channel 2 data output bit 3 |
| 引脚 42 | D4_2 — Channel 2 data output bit 4 |
| 引脚 43 | D5_2 — Channel 2 data output bit 5 |
| 引脚 44 | D6_2 — Channel 2 data output bit 6 |
| 引脚 45 | D7_2 — Channel 2 data output bit 7 |
| 引脚 46 | D8_2 — Channel 2 data output bit 8 |
| 引脚 47 | D9_2 — Channel 2 data output bit 9 |
| 引脚 48 | D10_2 — Channel 2 data output bit 10 |
| 引脚 49 | D11_2 — Channel 2 data output bit 11 (MSB) |
| 引脚 50 | GND — Ground |
| 引脚 51 | MODE — Output mode select (CMOS/CMOS-LP) |
| 引脚 52 | ENC — Encode input for test mode |
| 引脚 53 | SHDN — Shutdown (active low) |
| 引脚 54 | GND — Ground |
| 引脚 55 | VA — Analog 3V supply |
| 引脚 56 | GND — Ground |
| 引脚 57 | VA — Analog 3V supply |
| 引脚 58 | GND — Ground |
| 引脚 59 | VA — Analog 3V supply |
| 引脚 60 | GND — Ground |
| 引脚 61 | VA — Analog 3V supply |
| 引脚 62 | GND — Ground |
| 引脚 63 | VA — Analog 3V supply |
| 引脚 64 | EPAD — Exposed pad (must be soldered to ground plane) |
典型应用
LTC2292IUP 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： LTC2292IUP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Higher sample rate than the LTC2286/LTC2291 family members （对比 LTC2286IUP)
- Lower cost than the 65 Msps LTC2293 （对比 LTC2293IUP)
- Industrial temperature range vs commercial （对比 LTC2292CUP)
- Lower power than the LTC2293 at 65 Msps （对比 LTC2293IUP)
设计说明
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.
合规信息
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.
