LTC2195IUKG - 16-Bit 125Msps Dual ADC | Analog Devices
MPN： LTC2195IUKG ✓ 啟用中LTC2195IUKG 概覽
What is a pipelined ADC? A pipelined analog-to-digital converter is a multi-stage architecture that converts an analog input into a digital code by passing the signal through a cascade of low-resolution flash sub-converter stages. Each stage resolves a portion of the input, holds the residue, and hands it to the next stage. Pipelined ADCs are favored for sample rates between about 10 Msps and several hundred Msps because they balance high throughput, moderate latency, and excellent dynamic performance at moderate power. The LTC2195IUKG sits inside the broader taxonomy of ADC -> data converter -> signal chain IC -> semiconductor.
Key features include simultaneous sampling of two independent analog inputs, ultralow 0.07 ps RMS aperture jitter enabling IF undersampling, and a single +1.8V supply rail that simplifies power-tree design. The pipelined core is paired with a high-bandwidth input buffer and integrated reference, eliminating the need for an external ADC driver in many applications. 1ku list pricing begins at $165.77 as of 2026-10-13.
The LTC2195 is part of a pin-compatible family that also includes the 105 Msps LTC2194 and 80 Msps LTC2193, plus speed-grade variants within each speed node. This pin compatibility allows designers to swap parts on the same PCB to trade speed for power without re-laying out the board, which is particularly useful in multi-channel receiver platforms.
Typical applications include multi-carrier software-defined radio (SDR) receivers, LTE and 3G base-station digitizers, portable test and measurement instrumentation, medical imaging front-ends, and dual-antenna diversity receivers. The dual simultaneous sampling makes the device especially suited to I/Q demodulation, diversity reception, and any system requiring phase-coherent two-channel capture.
When designing in the LTC2195IUKG, ensure the analog inputs are AC-coupled with a bias network biased at the common-mode voltage to preserve linearity. The exposed pad must be soldered to a sufficient ground copper pour to keep junction temperature within the -40C to +85C industrial range at full 125 Msps throughput.
This page synthesizes distributor pricing, pin-compatible same-family variants, and practical design notes that complement, but are not contained in, the official Analog Devices datasheet.
直接替換替代品，適用於 LTC2195IUKG — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LTC2195IUKG （相同外形與佔位） — 差異在於 Package, Operating Temperature Range, Sample Rate, Input Type, Resolution.
LTC2195CUKG
✅ 直接替換聯絡詢價
查看資料表 →LTC2194IUKG
✅ 直接替換聯絡詢價
查看資料表 →LTC2193IUKG
✅ 直接替換聯絡詢價
查看資料表 →LTC2191IUKG
✅ 直接替換聯絡詢價
查看資料表 →LTC2190IUKG
✅ 直接替換聯絡詢價
查看資料表 →LTC2195IUKG 最大額定值與電氣特性
| 解析度 | 16 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 125 Msps |
| Architecture | Pipelined |
| Input Type | Single-ended and differential |
| SNR | 76.8 dB |
| SFDR | 90 dB |
| Aperture Jitter | 0.07 ps RMS |
| Power Dissipation | 535 mW |
| Digital Interface | Parallel / SPI (serial) / LVDS |
| 封裝 | 52-pin QFN (7x8 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40C to +85C (Industrial) |
| 1ku List Price | $165.77 (starting, as of 2026-10-13) |
| Temperature Grade | Industrial |
| Lead-Free / RoHS | Yes (PBF suffix indicates lead-free per-tray) |
LTC2195IUKG 腳位配置
| 腳位 1 | GND — Ground (per datasheet package pinout) |
| 腳位 2 | AINA+ — Channel A positive analog input |
| 腳位 3 | AINA- — Channel A negative analog input |
| 腳位 4 | GND — Ground |
| 腳位 5 | AINB+ — Channel B positive analog input |
| 腳位 6 | AINB- — Channel B negative analog input |
| 腳位 7 | GND — Ground |
| 腳位 8 | VCM — Common-mode voltage output |
| 腳位 9 | VREF — Reference voltage bypass |
| 腳位 10 | SENSE — Reference mode select (per datasheet) |
| 腳位 11 | GND — Ground |
| 腳位 12 | OGND — Output driver ground |
| 腳位 13 | D0A — Channel A data bit 0 (or LVDS pair in LVDS mode) |
| 腳位 14 | D1A — Channel A data bit 1 |
| 腳位 15 | D2A — Channel A data bit 2 |
| 腳位 16 | D3A — Channel A data bit 3 |
| 腳位 17 | D4A — Channel A data bit 4 |
| 腳位 18 | D5A — Channel A data bit 5 |
| 腳位 19 | D6A — Channel A data bit 6 |
| 腳位 20 | D7A — Channel A data bit 7 |
| 腳位 21 | D8A — Channel A data bit 8 |
| 腳位 22 | D9A — Channel A data bit 9 |
| 腳位 23 | D10A — Channel A data bit 10 |
| 腳位 24 | D11A — Channel A data bit 11 |
| 腳位 25 | D12A — Channel A data bit 12 |
| 腳位 26 | D13A — Channel A data bit 13 |
| 腳位 27 | D14A — Channel A data bit 14 |
| 腳位 28 | D15A — Channel A data bit 15 |
| 腳位 29 | OF_A — Channel A data overflow flag |
| 腳位 30 | CLKOUT_A — Channel A clock output / DCO |
| 腳位 31 | OGND — Output driver ground |
| 腳位 32 | D0B — Channel B data bit 0 |
| 腳位 33 | D1B — Channel B data bit 1 |
| 腳位 34 | D2B — Channel B data bit 2 |
| 腳位 35 | D3B — Channel B data bit 3 |
| 腳位 36 | D4B — Channel B data bit 4 |
| 腳位 37 | D5B — Channel B data bit 5 |
| 腳位 38 | D6B — Channel B data bit 6 |
| 腳位 39 | D7B — Channel B data bit 7 |
| 腳位 40 | D8B — Channel B data bit 8 |
| 腳位 41 | D9B — Channel B data bit 9 |
| 腳位 42 | D10B — Channel B data bit 10 |
| 腳位 43 | D11B — Channel B data bit 11 |
| 腳位 44 | D12B — Channel B data bit 12 |
| 腳位 45 | D13B — Channel B data bit 13 |
| 腳位 46 | D14B — Channel B data bit 14 |
| 腳位 47 | D15B — Channel B data bit 15 |
| 腳位 48 | OF_B — Channel B data overflow flag |
| 腳位 49 | CLKOUT_B — Channel B clock output / DCO |
| 腳位 50 | OE — Output enable (active high) |
| 腳位 51 | CS — SPI chip select (serial programming mode) |
| 腳位 52 | SCK — SPI serial clock / LVDS configuration mode |
| 腳位 EP | GND — Exposed pad - thermal and ground, must be soldered to PCB ground plane |
典型應用
LTC2195IUKG 適用於 6 應用s: Software-Defined Radio (SDR) Receiver, LTE / 3G Base-Station Digitizer, Test & Measurement Instrumentation, Medical Imaging Front-End, Diversity Receiver (Dual Antenna), Industrial Process-Control Data Acquisition.
Software-Defined Radio (SDR) Receiver
The LTC2195IUKG is well suited to software-defined radio receivers where two channels must capture phase-coherent I/Q baseband or a wideband IF. Its 125 Msps per channel lets designers digitize signals up to about 60 MHz of usable Nyquist bandwidth, while the dual simultaneous sampling enables I/Q demodulation without time-skew mismatch. The 76.8 dB SNR and 90 dB SFDR keep spurious tones well below the desired signal, and the 0.07 ps RMS aperture jitter permits accurate IF undersampling of carriers above the Nyquist frequency. The device's 535 mW total power draw keeps thermal budgets reasonable in portable or dense multi-channel receiver cards. Per the Analog Devices datasheet, this ADC pairs naturally with an FPGA or DSP that accepts CMOS, LVDS, or SPI data streams.
推薦
LTE / 3G Base-Station Digitizer
In LTE and 3G base-station receivers, the LTC2195IUKG digitizes wideband antenna signals while preserving the dynamic range needed for crest-factor reduction across many simultaneous users. The 76.8 dB SNR ensures that small uplink signals remain distinguishable from noise, and the 90 dB SFDR prevents intermodulation spurs from masking weaker users in adjacent resource blocks. Because the device samples at 125 Msps, a single ADC pair can capture a full 20 MHz LTE channel plus guard band with margin. The LVDS output mode reduces EMI in dense radio cards, an important consideration when many ADC channels sit near RF power amplifiers. Designers typically pair the part with a downstream FPGA running a CPRI or OBSAI framer.
推薦
Test & Measurement Instrumentation
Bench-top instruments such as digitizers, spectrum analyzers, and oscilloscope front-ends benefit from the LTC2195IUKG's combination of dual channels, 16-bit resolution, and 125 Msps throughput. The two simultaneous-sampling inputs allow direct capture of differential or complementary signals without external track-and-hold alignment. The pipelined core's wide input bandwidth suits the wideband IF strips used in modern vector signal analyzers. With 0.07 ps RMS aperture jitter, the device preserves phase accuracy for modulated measurements, and the 76.8 dB SNR provides enough headroom to characterize moderate-distortion devices on the bench. The 52-pin QFN 7x8 mm package simplifies integration into tight instrument front-end boards.
推薦
Medical Imaging Front-End
Ultrasound and other medical imaging front-ends use dual ADCs to capture returning echoes from paired transducer elements. The LTC2195IUKG's simultaneous-sampling dual channel architecture preserves the phase relationships needed for beamforming, while its 76.8 dB SNR ensures low-amplitude tissue echoes are not lost in quantization noise. Operating from a single 1.8 V supply, the part fits easily inside battery-powered portable ultrasound carts. The 0.07 ps RMS aperture jitter keeps timing accuracy high across fast pulse-echo sequences, which is essential for high-frame-rate imaging. The industrial -40C to +85C temperature rating covers the operating range of clinical equipment, including warmer sterilization-room environments.
推薦
Diversity Receiver (Dual Antenna)
Dual-antenna diversity receivers used in MIMO and antenna-combining systems require the two RF paths to be sampled with exact simultaneity so that the combiner sees a coherent snapshot. The LTC2195IUKG's pipelined architecture guarantees that both A and B channels convert on the same clock edge, eliminating the gain/phase mismatch that plagues time-interleaved designs. At 125 Msps per channel, designers can digitize 50+ MHz of instantaneous bandwidth per antenna with 16-bit headroom. The wide SFDR of 90 dB rejects intermodulation from out-of-band interferers common in dense urban deployments. The LVDS output mode is preferred in multi-channel diversity cards where many ADC traces would otherwise inject common-mode noise into sensitive RF sections.
推薦
Industrial Process-Control Data Acquisition
Process-control and condition-monitoring systems digitize vibration, acoustic, and current signals from industrial machinery to detect faults before catastrophic failure. The LTC2195IUKG provides two independent channels at 125 Msps, allowing simultaneous capture of, for example, vibration on a motor housing and current on the drive line, then post-processing for relative phase. With 76.8 dB SNR, the device captures the small dynamic signals of early-stage bearing wear, while the 0.07 ps RMS aperture jitter preserves the high-frequency harmonics that characterize imbalanced rotors. The -40C to +85C industrial temperature range covers factory-floor environments, and the 535 mW dissipation keeps the local thermal rise manageable inside sealed instrumentation housings.
推薦
推薦產品摘要
工程參考資料，適用於 LTC2195IUKG — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LTC2195CUKG | LTC2194IUKG | LTC2193IUKG | LTC2191IUKG | LTC2190IUKG |
|---|---|---|---|---|---|---|
| Package | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) | 52-QFN (7x8 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Sample Rate | 125 Msps | 125 Msps | 105 Msps | 80 Msps | 65 Msps | 50 Msps |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Channels | 2 simultaneous sampling | 2 simultaneous sampling | 2 simultaneous sampling | 2 simultaneous sampling | 2 simultaneous sampling | 2 simultaneous sampling |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Digital Interface | Parallel / SPI / LVDS | Parallel / SPI / LVDS | Parallel / SPI / LVDS | Parallel / SPI / LVDS | Parallel / SPI / LVDS | Parallel / SPI / LVDS |
| Typical Power @ max rate | 535 mW | 535 mW | lower (105 Msps) | lower (80 Msps) | lower (65 Msps) | lower (50 Msps) |
主要差異化特點
- Dual simultaneous sampling (對比LTC2180IUP)
- Pin compatibility across the LTC2195/2194/2193 speed grades (對比AD9268XCPZ-125 (cross-brand))
- Ultralow 0.07 ps RMS aperture jitter (對比LTC2174IUKG-14 (14-bit variant))
- 76.8 dB SNR and 90 dB SFDR (對比LTC2190IUKG (50 Msps family member))
設計說明
The 52-pin QFN exposed pad MUST be soldered to a continuous PCB ground pour to keep junction temperature within spec. A floating or undersized thermal pad will cause the device to overheat at 125 Msps, especially inside a sealed enclosure. Recommended: at least 1 square cm of 1 oz copper tied to ground directly under EP, plus thermal vias to inner ground planes.
Per the Analog Devices datasheet, route analog input traces as 100-ohm differential pairs with controlled impedance, keep them short, and place input termination resistors within 5 mm of the AIN pins. Separate the analog and digital supplies with a ferrite bead and place the 1.8 V decoupling capacitors within 50 mils of the AVDD and OVDD pins to avoid coupling switching noise into the analog front end.
Drive the CLK input with a low-jitter, 50%-duty-cycle source. The LTC2195IUKG's 0.07 ps RMS aperture jitter is achievable only if the sample clock jitter is significantly below this figure; a noisy FPGA PLL clock can dominate the SNR floor and erase the device's 76.8 dB SNR advantage. Use a dedicated clock buffer and twisted-pair or stripline routing for the CLK line.
Avoid routing parallel-CMOS data buses through the analog input region. With LVDS enabled, route the LVDS pairs as 100-ohm matched pairs and length-match within 5 ps so that all bits arrive at the FPGA within one clock period. Where long output traces exist, place 100-ohm termination at the FPGA side, not at the ADC side, per LVDS best practice.
合規資訊
Lead-free (PBF suffix) per Partstack listing 1869387330. RoHS compliant via the lead-free PBF ordering code; the standard LTC2195IUKG (non-PBF) lead finish is not RoHS. Halogen-free status not explicitly stated in the verified data.
