MAX1436ECQ+ - Octal 12-Bit 40Msps LVDS ADC | Maxim/Analog Devices
MPN: MAX1436ECQ+ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $65.75 | $65.75 |
| 10 | $59.18 | $591.80 |
| 100 | $52.6 | $5,260.00 |
| 500 | $46.03 | $23,015.00 |
| 1,000 | $39.45 | $39,450.00 |
MAX1436ECQ+ Overview
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous-time analog signals and produces discrete-time digital codes proportional to the input amplitude. Within the converter hierarchy, the MAX1436 belongs to the pipeline ADC subclass, which interleaves multiple low-resolution stages to achieve high sampling rates while keeping per-stage power low. Octal pipeline ADCs such as the MAX1436 are widely used in ultrasound front ends, medical imaging arrays, communications base stations, and multi-channel instrumentation where eight synchronized channels of 12-bit conversion at 40Msps are required.
Key specifications of the MAX1436ECQ+ include 12-bit resolution, 40Msps maximum sampling rate, an integrated input track-and-hold, internal voltage reference, and low-voltage differential signaling (LVDS) outputs that reduce ground bounce and radiated noise. The pin-compatible family offers higher speed grades (MAX1437 at 50Msps, MAX1438 at 65Msps), allowing designers to scale sampling rate without changing PCB layout.
Architecturally, each of the eight ADC channels uses a fully differential switched-capacitor pipelined front end followed by digital error correction logic. The LVDS serializer consolidates eight channels' worth of parallel data onto a small number of differential pairs, simplifying board routing and reducing the number of digital supply pins required. The exposed pad (EP) on the TQFP package provides a low thermal resistance path to the PCB copper pour, critical because the LVDS drivers and converter cores dissipate power continuously at full sampling rate.
Typical applications include ultrasound beamforming, medical imaging, instrumentation, multichannel communications, and phased-array radar. The wide input bandwidth and 40Msps rate make the part suitable for digitizing intermediate-frequency (IF) signals in software-defined radio receivers as well as time-interleaved acquisition systems.
When designing with this device, place 0.1 uF and 10 uF decoupling capacitors as close as possible to each supply pin, and provide a solid ground plane beneath the exposed pad with a minimum of 16 thermal vias to keep junction temperature within the -40C to +85C operating range. Source impedance matching at the analog inputs is critical to preserve the specified spurious-free dynamic range (SFDR) at full-rate operation.
This page synthesizes distributor pricing for MAX1436ECQ+, drop-in TQFP-100 pin-compatible alternatives, application references, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MAX1436ECQ+ — 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 MAX1436ECQ+ (same form factor and footprint) — differing in Package, Architecture, Input Type, Resolution, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1437ECQ+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1438ECQ+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1436ECQ+TD
✅ Drop-In✓ In Stock
$23.61 / Unit
View Datasheet →MAX1436ECQ+D
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1436BECQ+TD
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1218ECQ+TD
✅ Drop-In✓ In Stock
$23.4 / Unit
View Datasheet →MAX1436ECQ+ Maximum Ratings & Electrical Characteristics
| Resolution | 12 bit |
| Number of Channels | 8 (octal) |
| Sampling Rate (max) | 40 Msps |
| Architecture | Pipelined |
| Input Type | Fully differential |
| Output Interface | Serial LVDS |
| Analog Supply Voltage | 1.8 V |
| Digital Supply Voltage | 1.8 V |
| Package | 100-pin TQFP with exposed pad, 14 mm x 14 mm x 1 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (extended industrial) |
| RoHS Status | Compliant |
MAX1436ECQ+ 100-pin tqfp with exposed pad, 14 mm x 14 mm x 1 mm Pin Configuration Guide
Pin configuration for MAX1436ECQ+ (100-pin tqfp with exposed pad, 14 mm x 14 mm x 1 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MAX1436ECQ+.
Refer to the datasheet for full pin configuration.
Typical Applications
MAX1436ECQ+ is suitable for 6 applications: Ultrasound Imaging Front End, Medical Imaging and Diagnostic Equipment, Multichannel Communications Base Station, Test and Measurement Instrumentation, Phased-Array Radar Digitizer, Software-Defined Radio Receiver.
Ultrasound Imaging Front End
The MAX1436ECQ+ is a strong fit for ultrasound beamforming front ends because it provides 8 synchronized 12-bit / 40Msps conversion channels from a single 1.8V supply, eliminating the need for multiple discrete ADCs in array probe designs. Each of the eight fully differential inputs digitizes a receive channel's IF signal with low crosstalk, while the serial LVDS output consolidates data onto a small number of differential pairs - critical for routing through the probe's tight flex cable. Compared to a parallel-output ADC, the LVDS interface reduces EMI inside the shielded probe housing and simplifies FPGA pin allocation. Power dissipation per channel stays low at full 40Msps rate, allowing fanless portable cart designs. Recommended companion parts include the MAX4932 ultrasound transmit/receive switch and a Lattice ECP5 FPGA for beamforming.
Recommended
Medical Imaging and Diagnostic Equipment
The MAX1436ECQ+ suits multi-channel medical imaging systems such as CT detector digitizers and digital X-ray readout boards where 8 synchronized 12-bit / 40Msps channels per IC reduce board area. The 100-pin TQFP with exposed pad provides stable thermal performance for continuous full-rate operation in always-on diagnostic carts. The differential input structure rejects common-mode noise from nearby high-voltage X-ray tube drivers and motor controllers. Pin-compatible speed grades (MAX1437 50Msps, MAX1438 65Msps) let designers tune sampling rate per product family without PCB rework. The serial LVDS output minimizes digital switching noise coupling back into sensitive analog front ends. Recommended companion parts include low-noise LDOs and an FPGA for image reconstruction.
Recommended
Multichannel Communications Base Station
The MAX1436ECQ+ fits multichannel communications receiver designs such as MIMO base station digitizers where 8 simultaneous 12-bit / 40Msps channels digitize antenna-array IF outputs. The LVDS outputs interface directly to FPGAs or ASICs that perform channelization, decimation, and demodulation. Operating from a 1.8V supply, the part supports low-power baseband card designs that meet telecom thermal budgets. The wide input bandwidth handles IF frequencies in the 70-200 MHz range typical of LTE and 5G receivers, with sampling at 40Msps satisfying Nyquist for many IF architectures. The exposed pad TQFP package simplifies thermal management in densely-populated line cards.
Recommended
Test and Measurement Instrumentation
The MAX1436ECQ+ works well in modular oscilloscope, logic analyzer, and data acquisition cards that require simultaneous sampling of multiple input channels. Eight 12-bit / 40Msps channels per device allows 8-, 16-, or 24-channel instruments to be built by stacking two or three MAX1436 ICs with synchronized clocks. The serial LVDS output reduces the digital fan-out burden on the instrument backplane connector, important for modular PXI and LXI chassis where pin count is limited. The differential inputs provide excellent common-mode rejection for probing floating signals in power-electronics test. The industrial temperature range allows the card to operate in unconditioned factory and field environments.
Recommended
Phased-Array Radar Digitizer
The MAX1436ECQ+ fits phased-array radar sub-array digitizers where each antenna element channel must be sampled coherently at high rate. With 8 channels at 40Msps, the part covers a complete sub-array tile while consuming minimal board area. The differential analog inputs reject common-mode interference from adjacent high-power transmit modules, and the LVDS serial output maintains signal integrity over the backplane to the signal processor. Designers can scale to wider arrays by cascading multiple MAX1436 devices with shared clock and reference. The exposed pad package provides the thermal headroom required for continuous full-rate sampling during long radar dwells.
Recommended
Software-Defined Radio Receiver
The MAX1436ECQ+ serves as the digitizer in software-defined radio (SDR) receiver chains targeting multi-band, multi-channel applications. The 8-channel 12-bit / 40Msps architecture enables a single IC to handle multiple simultaneous RF channels after analog downconversion to baseband or low IF. The LVDS output connects to an FPGA running channelization, demodulation, and decimation, eliminating the need for a dedicated DSP. The wide input bandwidth and differential inputs accommodate the dynamic range requirements of broadband SDR receivers. The pin-compatible family allows the same PCB to be populated with MAX1437 (50Msps) or MAX1438 (65Msps) for higher-bandwidth variants.
Recommended
Recommended Products Summary
Engineering reference data for MAX1436ECQ+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1437ECQ+ | MAX1438ECQ+ | MAX1436ECQ+TD | MAX1436ECQ+D | MAX1436BECQ+TD |
|---|---|---|---|---|---|---|
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) |
| Package | 100-pin TQFP with exposed pad | 100-pin TQFP with exposed pad - same | 100-pin TQFP with exposed pad - same | 100-pin TQFP with exposed pad - same | 100-pin TQFP with exposed pad - same | 100-pin TQFP with exposed pad - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate (max) | 40 Msps | 50 Msps | 65 Msps | 40 Msps | 40 Msps | 40 Msps |
| Number of Channels | 8 | 8 | 8 | 8 | 8 | 8 |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Output Interface | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
| Input Type | Fully differential | Fully differential | Fully differential | Fully differential | Fully differential | Fully differential |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Pin-to-Pin Compatibility | Reference | Yes - 100% drop-in | Yes - 100% drop-in | Yes - identical die | Yes - identical die | Yes - same footprint |
Key Differentiators
- Pin-compatible speed grades across MAX143x family (vs MAX1437ECQ+ (50 Msps))
- Low-voltage 1.8V supply with LVDS outputs (vs MAX1436BECQ+TD (variant grade))
- 8 fully differential channels in one IC (vs MAX1218ECQ+TD (different Maxim ADC family))
Design Notes
The MAX1436ECQ+ requires separate analog and digital 1.8V supplies, with the analog supply feeding the ADC cores and references and the digital supply feeding the LVDS output drivers. Place 0.1uF ceramic decoupling capacitors as close as possible to each supply pin, supplemented by a single 10uF bulk capacitor near the supply entry point. Use ferrite beads or pi-filters between the analog and digital supply rails to prevent digital switching noise from coupling into the sensitive analog front end. Estimated: at 40 Msps full-rate operation, the part draws approximately 200-300 mA total, requiring a low-noise LDO or point-of-load DC-DC converter.
The 100-pin TQFP with exposed pad relies on the PCB copper pour and thermal vias for heat removal. Solder the exposed pad to a ground-connected copper area of at least 1 square inch, with a minimum of 16 thermal vias in a 0.3mm drill / 0.65mm pitch array connecting the top pad to internal ground planes. At continuous full-rate sampling, junction temperature can rise significantly; provide adequate airflow or attach a small heatsink for high-ambient-temperature applications. Estimated: with a properly designed 4-layer PCB and 16 thermal vias, theta_JA is approximately 20-25 C/W, allowing several watts of dissipation without exceeding the 85C ambient ceiling.
Route the LVDS output pairs as 100-ohm differential traces with matched lengths within each pair (skew < 5 ps) and length matching across pairs to minimize inter-pair skew. Keep LVDS traces on inner layers with continuous ground planes above and below to control characteristic impedance and reduce EMI. Separate the analog input traces from the LVDS output traces with a ground guard trace to prevent digital noise coupling into the analog front end. Place the external reference bypass capacitors within 3 mm of the REFIN pin to minimize reference noise pickup.
Do not operate the MAX1436ECQ+ without soldering the exposed pad - the pad is the primary thermal path and also provides the ground reference. Avoid exceeding 2Vpp differential input swing, as larger signals saturate the input track-and-hold and degrade linearity. Source impedance at the analog inputs should be matched within a few ohms across channels to preserve gain matching for time-interleaved applications. Finally, ensure the input clock has < 50 ps jitter to avoid degrading SNR at high input frequencies.
Compliance Information
RoHS and lead-free compliance confirmed by Maxim Integrated product markings. Halogen-free status not explicitly stated in available web data. AEC-Q100 not applicable as this is an industrial/medical imaging ADC rather than an automotive-grade part.
