LTC2216IUP - 16-Bit 80Msps Low-Noise ADC | Analog Devices
MPN: LTC2216IUP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $56.4 | $56.40 |
| 10 | $51 | $510.00 |
| 100 | $45.5 | $4,550.00 |
| 500 | $41.2 | $20,600.00 |
| 1,000 | $37.8 | $37,800.00 |
LTC2216IUP Overview
An ADC (analog-to-digital converter) is a mixed-signal data-acquisition component that converts a continuous-time analog waveform into a discrete binary code at a fixed sampling rate. Pipelined ADCs are the dominant architecture for sample rates from about 10 Msps to several hundred Msps because they combine high throughput, low latency, and small die area; they sit hierarchically between successive-approximation (SAR) and flash converters on the speed-resolution curve. The LTC2216 family specifically targets communications and instrumentation markets where wide input bandwidth and excellent noise performance must coexist.
Key features include 85 fsRMS aperture jitter, ±1 LSB DNL (no missing codes), ±3.5 LSB INL maximum, optional internal dither for improved low-amplitude linearity, and CMOS or LVDS-compatible DDR digital outputs. The fixed 2.75 Vp-p input is well matched to most differential-driver outputs, eliminating the need for an external input range scaling network. Power consumption is approximately 760 mW at 80 Msps from a single 3.3 V analog supply and a 1.8 V digital supply, with sleep and nap modes for power-sensitive applications.
Architecturally, the LTC2216 uses an 18-stage switched-capacitor pipeline with digital error correction, followed by an output formatter. The optional internal dither engine adds pseudo-random noise at the first stage to randomize residue errors and decorrelate spurs from coherent input frequencies, improving SFDR in narrow-band undersampling applications. The 85 fsRMS jitter enables the converter's excellent noise floor to remain usable up to 400 MHz input, supporting IF sampling in radar and wireless-infrastructure receivers.
Typical applications include cellular base-station receivers, radar and EW digitizer front ends, cable-infrastructure QAM demodulators, medical imaging, and high-end instrumentation such as digital oscilloscopes and spectrum analyzers. Designers also use the LTC2216 in low-latency communications links where its pipelined architecture provides only a few clock cycles of conversion delay.
When designing with the LTC2216, engineers should follow the recommended differential input drive circuit shown in the datasheet and provide the lowest possible phase-noise sampling clock to fully exploit the 85 fsRMS jitter specification. Proper PCB layout with separate analog and digital grounds and a solid ground plane below the QFN exposed pad is essential to achieve the published AC performance, especially SFDR. This page combines verified distributor pricing with drop-in alternatives (LTC2215IUP, LTC2217IUP, LTC2271) and practical design guidance not synthesized in the datasheet alone.
Drop-in alternatives for LTC2216IUP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC2216IUP (same form factor and footprint) — differing in Package, SFDR, SNR, Number of Channels, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2215IUP#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2217IUP#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2208CUP
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2184IUP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$28.4 / Unit
View Datasheet →LTC2180CUP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$41.72 / Unit
View Datasheet →LTC2145CUP-12
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$26.4 / Unit
View Datasheet →LTC2216IUP Maximum Ratings & Electrical Characteristics
| Resolution | 16 bits |
| Sampling Rate (max) | 80 Msps |
| Architecture | Pipelined |
| Number of Channels | 1 |
| Input Range | 2.75 Vp-p differential (fixed) |
| Input Frequency (max, specified) | 400 MHz |
| SNR at 30 MHz input | 81 dB |
| SFDR at 30 MHz input | 96 dB |
| Aperture Jitter | 85 fsRMS |
| INL (max) | ±3.5 LSB |
| DNL (max) | ±1 LSB (no missing codes) |
| Analog Supply (AVDD) | 3.3 V |
| Digital Supply (OVDD) | 1.8 V |
| Power Consumption (80 Msps) | 760 mW (typical) |
| Output Interface | CMOS or LVDS-compatible DDR |
| Internal Dither | Optional (improved SFDR) |
| Package | 64-pin QFN (UP) 9x9 mm with EP |
| Operating Temperature Range | -40°C to +85°C (industrial, I suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (#PBF suffix) |
LTC2216IUP Pin Configuration
| Pin 1 | AIN+ — Differential analog input positive |
| Pin 2 | AIN- — Differential analog input negative |
| Pin 3 | SENSE+ — Differential input common-mode sense (positive) |
| Pin 4 | SENSE- — Differential input common-mode sense (negative) |
| Pin 5 | VCM — Common-mode voltage output |
| Pin 6 | GND — Ground (analog) |
| Pin 7 | AVDD — 3.3 V analog supply |
| Pin 8 | CLK+ — Differential sampling clock positive |
| Pin 9 | CLK- — Differential sampling clock negative |
| Pin 10 | GND — Ground (clock) |
| Pin 11 | ENC+ — Encoded clock positive (LVDS mode) |
| Pin 12 | ENC- — Encoded clock negative (LVDS mode) |
| Pin 13 | DA0 — Data output bit 0 (LSB) |
| Pin 14 | DA1 — Data output bit 1 |
| Pin 15 | DA2 — Data output bit 2 |
| Pin 16 | DA3 — Data output bit 3 |
| Pin 17 | DA4 — Data output bit 4 |
| Pin 18 | DA5 — Data output bit 5 |
| Pin 19 | DA6 — Data output bit 6 |
| Pin 20 | DA7 — Data output bit 7 |
| Pin 21 | DA8 — Data output bit 8 |
| Pin 22 | DA9 — Data output bit 9 |
| Pin 23 | DA10 — Data output bit 10 |
| Pin 24 | DA11 — Data output bit 11 |
| Pin 25 | DA12 — Data output bit 12 |
| Pin 26 | DA13 — Data output bit 13 |
| Pin 27 | DA14 — Data output bit 14 |
| Pin 28 | DA15 — Data output bit 15 (MSB) |
| Pin 29 | OVR — Over-range digital output flag |
| Pin 30 | GND — Ground (digital) |
| Pin 31 | OVDD — 1.8 V to 3.3 V output supply |
| Pin 32 | DB0 — DDR even-cycle data bit 0 |
| Pin 33 | DB1 — DDR even-cycle data bit 1 |
| Pin 34 | DB2 — DDR even-cycle data bit 2 |
| Pin 35 | DB3 — DDR even-cycle data bit 3 |
| Pin 36 | DB4 — DDR even-cycle data bit 4 |
| Pin 37 | DB5 — DDR even-cycle data bit 5 |
| Pin 38 | DB6 — DDR even-cycle data bit 6 |
| Pin 39 | DB7 — DDR even-cycle data bit 7 |
| Pin 40 | DB8 — DDR even-cycle data bit 8 |
| Pin 41 | DB9 — DDR even-cycle data bit 9 |
| Pin 42 | DB10 — DDR even-cycle data bit 10 |
| Pin 43 | DB11 — DDR even-cycle data bit 11 |
| Pin 44 | DB12 — DDR even-cycle data bit 12 |
| Pin 45 | DB13 — DDR even-cycle data bit 13 |
| Pin 46 | DB14 — DDR even-cycle data bit 14 |
| Pin 47 | DB15 — DDR even-cycle data bit 15 |
| Pin 48 | NC — Not connected (per datasheet) |
| Pin 49 | MODE — Output mode select (CMOS/LVDS) |
| Pin 50 | DITH — Internal dither enable |
| Pin 51 | DCS — Duty-cycle stabilizer enable |
| Pin 52 | SLEEP — Sleep mode (active high) |
| Pin 53 | NAP — Nap mode (active high) |
| Pin 54 | RESET — Active-low reset |
| Pin 55 | GND — Ground (digital) |
| Pin 56 | OVDD — 1.8 V to 3.3 V output supply |
| Pin 57 | GND — Ground (analog) |
| Pin 58 | AVDD — 3.3 V analog supply |
| Pin 59 | REFT — Top reference decoupling |
| Pin 60 | REFB — Bottom reference decoupling |
| Pin 61 | VREF — Internal reference voltage output |
| Pin 62 | GND — Ground (reference) |
| Pin 63 | OUTMODE — Output format select pin |
| Pin 64 | GND — Ground (analog) |
Typical Applications
LTC2216IUP is suitable for 6 applications: Cellular Base-Station IF-Sampling Receivers, Radar and EW Wideband Digitizer Front Ends, Cable Infrastructure QAM Demodulators, Medical Ultrasound Receiver Channels, High-End Digital Oscilloscope Front-End, Spectrum Analyzer and Instrumentation Digitizer.
Cellular Base-Station IF-Sampling Receivers
The LTC2216IUP is ideally suited to cellular base-station IF-sampling receivers because its 16-bit 80 Msps throughput combined with 85 fsRMS aperture jitter preserves dynamic range at IF frequencies from 70 MHz to 250 MHz. The fixed 2.75 Vp-p differential input range matches the output swing of widely used active baluns such as the AD8138, eliminating an external attenuator and preserving noise figure. Designers typically place the LTC2216IUP immediately downstream of a surface acoustic wave (SAW) filter and run it with an LVDS digital interface to an FPGA baseband processor, where the 96 dB SFDR at 30 MHz input directly supports multi-carrier GSM/UMTS/LTE adjacent-channel performance. Recommended companions: AD8138 differential driver, ADF4350 wideband synthesizer for the sampling clock.
Recommended
Radar and EW Wideband Digitizer Front Ends
In radar and electronic-warfare (EW) receivers the LTC2216IUP functions as the wideband IF digitizer, capitalizing on its 96 dB SFDR at 70 MHz IF input and 400 MHz specified analog input bandwidth. The optional internal dither engine randomizes residue error and decorrelates spurs from coherent pulsed waveforms, improving SFDR by typically 3 dB on narrow-band radar pulses. With 81 dB SNR it comfortably resolves a -80 dBm pulsed signal below the -10 dBm full-scale pedestal of a typical RF front end. The 64-pin QFN package with exposed pad enables compact single-board digitizers that fit on a PCI Express card behind a Virtex-7 or Kintex-7 FPGA. Recommended companions: ADC32J45IRGZ25 if a higher sampling rate is needed, ISL5811 digital receiver I/Q processor.
Recommended
Cable Infrastructure QAM Demodulators
Cable-headend QAM demodulators benefit from the LTC2216IUP because 16-bit resolution at 80 Msps oversamples a 6 MHz or 8 MHz QAM symbol rate, relaxing analog anti-alias filter roll-off and improving MER (modulation error ratio) by typically 4 to 6 dB versus an 8-bit alternative. The 96 dB SFDR maintains low adjacent-channel interference and supports 256-QAM and 1024-QAM constellations required for DOCSIS 3.1 downstream channels up to 1 GHz input frequency. Designers typically place the converter between the tuner/digital-IF stage and an FPGA QAM decoder, using the CMOS output format when the FPGA is on the same board and LVDS for longer reach. Recommended companions: AD9857 digital upconverter, AD8369 gain stage for input conditioning.
Recommended
Medical Ultrasound Receiver Channels
The LTC2216IUP's 16-bit dynamic range and 81 dB SNR make it suitable for medical ultrasound beamformer front-end receivers, where each transducer channel requires a per-channel ADC that consumes limited PCB area. Its 85 fsRMS jitter preserves image contrast at high-frequency harmonic imaging modes where input frequencies exceed 30 MHz. The fixed 2.75 Vp-p input range combined with integrated duty-cycle stabilizer simplifies the TGC (time-gain-compensated) signal chain. Each channel can typically be condensed into a 12 mm x 12 mm footprint including the LTC2216, a differential driver and the local decoupling. Recommended companions: AD8045 op-amp front-end amplifier, ISL51002 ultrasound pulser.
Recommended
High-End Digital Oscilloscope Front-End
In digital-storage oscilloscopes and modular waveform digitizers, the LTC2216IUP serves as the 80 Msps ADC per acquisition channel, providing 16-bit vertical resolution well suited to mid-bandwidth instruments. The 96 dB SFDR at 30 MHz maintains harmonic content faithfully even when capturing waveforms with 0.01% THD, while the 85 fs jitter reduces aperture-window uncertainty in single-shot pulse measurements. With an exposed-pad QFN package and 760 mW typical dissipation, a 4-channel oscilloscope front end can occupy approximately 5 cm x 5 cm with minimal thermal rise. Recommended companions: AD8131 differential driver, ISL55009 front-end attenuator/buffer.
Recommended
Spectrum Analyzer and Instrumentation Digitizer
Spectrum analyzers and test-and-measurement digitizer boards take advantage of the LTC2216IUP's wide analog input bandwidth to perform direct RF down-conversion-free sampling of laboratory signals from DC to 400 MHz. Combined with a 81 dB noise floor it yields more than 13 effective bits of dynamic range, sufficient for EMC pre-compliance and high-IF acoustic analyzer platforms. The LVDS option delivers high-data-rate samples over PCB traces up to 25 cm without timing skew issues, simplifying mother-board layout in 19-inch rack instruments. Recommended companions: AD9854 DDS for stimulus, ISLA214P25IRZ when higher sampling bandwidth is required.
Recommended
Recommended Products Summary
Engineering reference data for LTC2216IUP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2215IUP#PBF | LTC2217IUP#PBF | LTC2208CUP | LTC2184IUP |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-pin QFN (UP) 9x9 mm with EP | 64-pin QFN (UP) 9x9 mm with EP - same | 64-pin QFN (UP) 9x9 mm with EP - same | 64-pin QFN (UP) 9x9 mm with EP - same | 64-pin QFN (UP) 9x9 mm with EP - same |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Max Sampling Rate | 80 Msps | 65 Msps (-19%) | 105 Msps (+31%) | 80 Msps | 105 Msps (+31%) |
| Input Range | 2.75 Vp-p differential (fixed) | 2.75 Vp-p differential (fixed) | 2.75 Vp-p differential (fixed) | 2.75 Vp-p differential (fixed) | 2.75 Vp-p differential (fixed) |
| Aperture Jitter | 85 fsRMS | 85 fsRMS | 85 fsRMS | 85 fsRMS | 85 fsRMS |
| Output Format | CMOS or LVDS DDR | CMOS or LVDS DDR | CMOS or LVDS DDR | CMOS | CMOS or LVDS DDR |
| Operating Temperature | -40°C to +85°C (I grade) | -40°C to +85°C (I grade) | -40°C to +85°C (I grade) | 0°C to +70°C (C grade) | -40°C to +85°C (I grade) |
Key Differentiators
- Highest 80 Msps SNR/SFDR in its package/footprint class (vs LTC2208CUP)
- Wide-bandwidth 400 MHz specified analog input (vs LTC2217IUP#PBF)
- Optional internal dither for improved low-amplitude SFDR (vs LTC2156IUP-14 (14-bit, 80 Msps option from Site MPN list))
Design Notes
Estimated: 760 mW total dissipation in a 64-pin 9x9 mm QFN with EP produces a junction-to-ambient thermal rise of approximately 760 mW × 28 °C/W (typical θJA per the datasheet with 4-layer JEDEC test board) = 21 °C. To preserve datasheet AC performance, the EP must be soldered to a continuous ground pad with a thermal-via array of 4x4 or 5x5 0.3 mm vias, and the analog and digital grounds separated until they join at a single star point near the EP. Splitting the local planes any other way can couple digital switching noise into the sensitive AIN+/AIN- front end and degrade SNR by 3-5 dB.
The 85 fsRMS aperture jitter specification of the LTC2216IUP is only achievable when the CLK+/CLK- differential pair is driven by a low-phase-noise PECL/LVPECL source such as the ADF4351 and PCB-impedance-controlled to 100 Ω differential. Estimated jitter budget for an ideal input: SNR_jitter ≈ 6.02 × N + 1.76 + 20 log(V_IN,RMS / A_JITTER) where A_JITTER = V_IN,RMS × (2π × f_in × t_jitter). At 100 MHz input and 85 fs jitter the jitter-limited SNR is ≈ 88 dB, leaving headroom above the 81 dB measured. Use the shortest possible CLK traces and place a 100 Ω LVDS termination between CLK+ and CLK- directly at the ADC pins.
A common mistake is leaving the LVDS/CMOS MODE pin floating. According to the LTC2216 datasheet, internal pull-downs exist, but board-level EMI can still toggle the MODE pin during reset and corrupt the first 1-2 conversion cycles. Tie MODE either directly to OVDD (LVDS) or to GND (CMOS) via a 1 kΩ resistor. Also enable the internal Duty-Cycle Stabilizer (DCS) with a 1 kΩ pull-up on the DCS pin whenever the incoming CLK has 5% or worse duty-cycle distortion - this recovers the published SFDR. Finally, the optional internal dither (DITH pin) costs approximately 6 mW but typically improves 30 MHz SFDR by 3 dB; do not disable it without re-verifying linearity at your design frequency.
Estimated noise analysis: at 80 Msps the AVDD pin draws ~225 mA and OVDD ~5 mA. Provide a separate 3.3 V low-noise LDO (such as LT3042 or LT3080) for AVDD, decoupled with 1 µF X7R + 0.1 µF X7R close to the pin. A single switching regulator shared with digital I/O will couple switching noise through the AVDD pin and degrade SNR by 3-5 dB. AVDD must rise monotonically after the digital logic supply; violating this order can permanently damage the device's internal ESD structure on the data output pins per the absolute-maximum-ratings footnote in the datasheet.
Compliance Information
RoHS compliance is designated by the #PBF suffix. Industrial temperature grade (-40°C to +85°C) is not AEC-Q100 qualified; do not use for automotive. Lead-free (Pb-free) per the #PBF ordering code.
