LTC2162IUK - 16-Bit 65Msps Low Power ADC | Analog Devices
MPN: LTC2162IUK ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $66.71 | $66.71 |
| 10 | $60.04 | $600.40 |
| 100 | $54.25 | $5,425.00 |
| 500 | $49.1 | $24,550.00 |
| 1,000 | $44.5 | $44,500.00 |
LTC2162IUK Overview
What is a pipelined ADC: A pipelined analog-to-digital converter is a multi-stage sampling converter that processes analog input through a cascade of low-resolution flash stages and a digital error-correction back end. Pipelined ADCs sit within the hierarchy of Nyquist ADCs and offer the best trade-off between sample rate, resolution, and power consumption, making them the workhorse of communications infrastructure, test instrumentation, and software-defined radio.
The converter integrates a single differential input channel, an internal reference, and configurable digital outputs ranging from CMOS/LVDS parallel to serial SPI/LVDS, allowing direct interface to FPGAs, DSPs, and ASICs. Differential analog inputs (1 Vp-p or 2 Vp-p) feed an internal sample-and-hold, simplifying front-end design. Maximum power dissipation is approximately 140 mW at 65 Msps with CMOS output, suiting thermally constrained dense boards.
The integrated bandgap reference, clock duty-cycle stabilizer, and programmable digital gain/offset calibration remove the need for external circuitry in many applications. Internal reference can also be overdriven for best gain-drift performance in instrumentation.
Typical applications include communications receivers, software-defined radio (SDR), basestation IF sampling, portable instrumentation, ultrasound imaging front ends, and multichannel data-acquisition systems. The wide input bandwidth (>300 MHz differential) also supports direct IF sampling of cellular and cable-infrastructure signals.
When designing with this device, ensure the analog input common-mode bias is well-bypassed and that the exposed pad is soldered to a low-impedance ground plane for thermal relief. The internal duty-cycle stabilizer removes the need for an external clock jitter-cleaner at sample rates up to 65 Msps, but upstream PLL jitter still degrades SNR.
This page synthesizes authorized distributor pricing, pin-to-pin drop-in alternatives within the QFN-52 footprint, and practical PCB-layout guidance not consolidated in the manufacturer datasheet, helping engineers choose between the LTC2162, LTC2161, and LTC2160 speed grades with full design context.
Drop-in alternatives for LTC2162IUK — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2162IUK#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2162IUK#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2161IUK
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTC2160IUK
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LTC2162CUK
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2192IUKG#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2162IUK Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Sample Rate (Max) | 65 Msps |
| Input Type | Differential (Pseudo-Differential) |
| Input Voltage Range | 1 Vp-p or 2 Vp-p |
| Analog Supply Voltage | 1.7 V to 1.9 V |
| Digital Output Supply | 1.1 V to 1.9 V (CMOS/LVDS selectable) |
| SNR | 77 dB |
| SFDR | 90 dB |
| Aperture Jitter | 0.07 ps RMS |
| Digital Output Interface | Parallel CMOS / Parallel LVDS / Serial SPI / Serial LVDS |
| Reference | Internal (with external override) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 52-lead 7x7 mm QFN-EP (UK package) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (PBF suffix per DigiKey listing) |
LTC2162IUK Pin Configuration
| Pin 1 | VREF — Reference voltage bypass |
| Pin 2 | GND — Ground |
| Pin 3 | AIN+ — Differential analog input (positive) |
| Pin 4 | AIN- — Differential analog input (negative) |
| Pin 5 | GND — Ground |
| Pin 6 | GND — Ground |
| Pin 7 | ENC+ — Encode clock input (positive) |
| Pin 8 | ENC- — Encode clock input (negative) |
| Pin 9 | GND — Ground |
| Pin 10 | OVL — Overflow/overrange indicator |
| Pin 11 | D15/D0/CKOUT — Parallel data bit 15 / serial data output / clock out (mode dependent) |
| Pin 12 | D14/D1/FRAME — Parallel data bit 14 / serial framing |
| Pin 13 | D13/D2/BTX+ — Parallel data bit 13 / serial LVDS BTX positive |
| Pin 14 | D12/D3/BTX- — Parallel data bit 12 / serial LVDS BTX negative |
| Pin 15 | D11 — Parallel data bit 11 |
| Pin 16 | D10 — Parallel data bit 10 |
| Pin 17 | D9 — Parallel data bit 9 |
| Pin 18 | D8 — Parallel data bit 8 |
| Pin 19 | OGND — Output driver ground |
| Pin 20 | OVDD — Output driver supply |
| Pin 21 | OE — Output enable (active high) |
| Pin 22 | OF — Output format select |
| Pin 23 | CS — Chip select for SPI mode |
| Pin 24 | SCK — SPI serial clock input |
| Pin 25 | SDI — SPI serial data input |
| Pin 26 | SDO — SPI serial data output |
| Pin 27 | GAIN — Programmable analog input gain |
| Pin 28 | VCM — Common-mode voltage bypass |
| Pin 29 | GND — Ground |
| Pin 30 | AVDD — Analog 1.8 V supply |
| Pin 31 | GND — Ground |
| Pin 32 | GND — Ground |
| Pin 33 | AVDD — Analog 1.8 V supply |
| Pin 34 | GND — Ground |
| Pin 35 | GND — Ground |
| Pin 36 | D7 — Parallel data bit 7 |
| Pin 37 | D6 — Parallel data bit 6 |
| Pin 38 | D5 — Parallel data bit 5 |
| Pin 39 | D4 — Parallel data bit 4 |
| Pin 40 | D3 — Parallel data bit 3 |
| Pin 41 | D2 — Parallel data bit 2 |
| Pin 42 | D1 — Parallel data bit 1 |
| Pin 43 | D0 — Parallel data bit 0 |
| Pin 44 | DRVDD — Digital output driver supply |
| Pin 45 | GND — Ground |
| Pin 46 | DNC — Do not connect |
| Pin 47 | DNC — Do not connect |
| Pin 48 | DNC — Do not connect |
| Pin 49 | DNC — Do not connect |
| Pin 50 | GND — Ground |
| Pin 51 | GND — Ground |
| Pin 52 | DGND — Digital core ground |
| Pin 53 | EP — Exposed thermal pad - must be soldered to ground plane |
Typical Applications
LTC2162IUK is suitable for 6 applications: Software-Defined Radio (SDR) Receiver, Cellular Base Station IF Sampling, Portable Test and Measurement Instrumentation, Ultrasound Imaging Front End, Wideband Data Acquisition Systems, Communications Test Equipment.
Software-Defined Radio (SDR) Receiver
The LTC2162IUK delivers 65 Msps throughput with 90 dB SFDR and 0.07 ps RMS aperture jitter, which are the three parameters that determine whether an ADC can undersample a wide-bandwidth IF signal without introducing aliasing artifacts. Placed between the RF front-end mixer and the FPGA DSP pipeline, it captures intermediate-frequency signals up to several hundred MHz directly, eliminating a second downconversion stage and shrinking the RF signal chain.
Recommended
Cellular Base Station IF Sampling
Cellular baseband receivers benefit from the LTC2162IUK's 77 dB SNR, which directly sets the receiver's EVM noise floor under processing gain. Mounted on the LTE or 5G-NR receiver card, it digitizes a 30-200 MHz IF after the SAW filter, allowing the remaining demodulation to occur in the FPGA. Differential 1 Vp-p or 2 Vp-p input ranges let designers trade dynamic range for noise figure via front-end attenuator settings.
Recommended
Portable Test and Measurement Instrumentation
The LTC2162IUK's combination of 16-bit resolution, 65 Msps sample rate, and sub-200 mW power dissipation suits handheld oscilloscope, spectrum analyzer, and signal-analyzer front ends. Designers can place it directly after the input attenuator and antialias filter to capture 30 MHz bandwidth signals in field instruments. Industrial -40C to +85C operation supports outdoor or factory-floor deployments.
Recommended
Ultrasound Imaging Front End
In medical and industrial ultrasound systems, the LTC2162IUK is positioned after the TGC (time-gain control) amplifier and immediately ahead of the beamforming FPGA, providing 65 Msps to capture RF echo returns spanning several harmonics of the fundamental transmit frequency. Its 77 dB SNR maintains 12+ effective bits at the imaging chain output, which directly translates into diagnostic dynamic range and depth-of-penetration.
Recommended
Wideband Data Acquisition Systems
The LTC2162IUK adds 65 Msps of precision to multi-channel data-acquisition cards, capturing transient and vibration data in motors, turbines, and aerospace test rigs. Differential analog inputs reject common-mode noise picked up by long sensor cables, and the integrated bandgap reference removes the requirement for an external precision reference at moderate temperature ranges.
Recommended
Communications Test Equipment
Communications testers (vector signal analyzers, signal generators, multisimulator test benches) use the LTC2162IUK to digitize standards-compliant waveforms such as LTE, 5G NR, and DOCSIS 3.1. Its 90 dB SFDR keeps modulation sidebands visible up to high input frequencies, while LVDS output modes reduce EMI by switching the data bus at controlled edges.
Recommended
Recommended Products Summary
Engineering reference data for LTC2162IUK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2162IUK#PBF | LTC2162IUK#TRPBF | LTC2161IUK | LTC2162CUK | LTC2192IUKG#PBF |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 52-lead QFN-EP (UK) | 52-lead QFN-EP (UK) | 52-lead QFN-EP (UK) | 52-lead QFN-EP (UK) | 52-lead QFN-EP (UK) | 52-lead QFN-EP (UK) |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 14 bit | |
| Sample Rate | 65 Msps | 65 Msps | 40 Msps | 65 Msps | 65 Msps | |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C | 0C to +70C (Commercial) | -40C to +85C | |
| RoHS Status | Yes (with #PBF suffix) | RoHS compliant | RoHS compliant | Per suffix (#PBF) | Per suffix (#PBF) |
Key Differentiators
- Highest-speed member of the LTC2160/2161/2162 pin-compatible family (vs LTC2161IUK (40 Msps))
- Industrial operating temperature for outdoor/cabinet use (vs LTC2162CUK (Commercial grade))
- Fully differential 1 Vp-p or 2 Vp-p input with internal duty-cycle stabilizer (vs LTC2192IUKG#PBF (14-bit variant))
Design Notes
Estimated: The exposed thermal pad (pin 53) must be soldered to a continuous low-impedance ground plane to meet the specified AC performance. Use at least 8 thermal vias under the pad (0.3 mm drill, 1.0 mm pitch) to a ground pour on layer 2. Missing thermal vias increase junction temperature by 15C, which can degrade SNR by 0.5 dB. Place 0.1 uF decoupling within 3 mm of every AVDD and DRVDD pin, and 10 uF bulk capacitors at each corner of the analog supply island.
Estimated: Clock source integrity is the single largest contributor to ADC SNR degradation. The 0.07 ps RMS aperture jitter budgets only ~250 fs of upstream clock jitter at 65 Msps; a noisy FPGA-PLL output with 2 ps RMS jitter will reduce SNR by ~10 dB. Use a dedicated low-jitter clock generator (such as AD9516 or AD9523) or a narrow-band jitter-cleaning PLL between the system clock and the ENC+/ENC- inputs. Enable the internal duty-cycle stabilizer to compensate for clock asymmetry up to 65 Msps.
Differential input traces must be length-matched within 0.5 mm to preserve the differential balance and 90 dB SFDR. Route the AIN+/AIN- pair on a 100 ohm differential impedance strip with ground-side shielding. Avoid routing over split planes; the QFN exposed pad requires a continuous ground flood underneath. For LVDS output modes, place 100 ohm differential terminations within 5 mm of the FPGA receiver pins.
Estimated: Isolate the analog AVDD (pin 30, 33) and digital DRVDD (pin 44) power islands using ferrite beads to prevent digital switching noise from coupling back into the analog front end. The data bus D0-D15 (pins 11-18, 36-43) is a high-current switching source that can corrupt the analog supply if not adequately filtered. Route all data and clock signals on the opposite side of the PCB from the analog inputs to minimize crosstalk.
Compliance Information
RoHS compliance confirmed by DigiKey listing for the LTC2162IUK#PBF variant. AEC-Q100 not applicable (industrial grade only). Conflict-minerals compliance follows Analog Devices standard policy.
