Analog Devices Inc./Maxim Integrated MAX1195ECM+D

Overview

MAX1195ECM+D from Maxim Integrated is a dual, 8-bit, 40Msps analog-to-digital converter optimized for low-power, high-dynamic-performance applications including baseband I/Q sampling, ultrasound imaging, and battery-powered instrumentation. It operates from a single 2.7V–3.6V supply, delivers 48.5dB SINAD at 20MHz input, features fully differential 400MHz (–3dB) input bandwidth, and integrates a 2.048V precision bandgap reference.

For engineers reviewing the MAX1195ECM+D datasheet, MAX1195ECM+D pinout, MAX1195ECM+D application, or MAX1195ECM+D equivalent, key selection considerations include dual-channel crosstalk (–72dB), channel matching (±0.05° phase, 0.05dB gain), parallel CMOS-compatible outputs with selectable two's complement/offset binary format, and support for internal, buffered external, or unbuffered external reference configurations.

Technical Context

The MAX1195ECM+D employs a seven-stage, fully differential pipelined architecture with 5-clock-cycle latency, enabling high-speed conversion while minimizing power. Each pipeline stage uses flash ADCs and multiplying DACs (MDACs) to process residue signals, with track-and-hold amplifiers supporting >Nyquist input frequencies.

Its dual T/H inputs accept fully differential or single-ended signals across ±1VP-P range, with matched impedance paths required for INA+/INA– and INB+/INB–. The device supports three reference modes-internal (REFOUT→REFIN), buffered external (REFIN-driven), and unbuffered external (REFIN = GND)-each defining distinct biasing and impedance behavior for REFP, REFN, and COM.

Key Specifications

Pinout & Package

MAX1195ECM+D is housed in a 48-pin TQFP-EP (7mm × 7mm) package with exposed paddle for thermal management. Pin functions are validated per Maxim's official pin description table (Rev 0, 4/02).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, medium-speed ADC applications.

Compared with MAX1197ECM+ and MAX1183ECM+, the MAX1195ECM+ offers optimal balance of power efficiency (87mW), 40Msps throughput, and 8-bit precision for cost-sensitive, thermally constrained dual-channel systems-making it ideal for portable medical and communications hardware where 48.5dB SINAD meets specification margins.

Availability

MAX1195ECM+D is available at Aetrix Electronics and suitable for baseband I/Q sampling, multichannel IF digitization, and ultrasound imaging requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for MAX1195ECM+D includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX1195ECM+D belongs to Maxim's high-speed, low-power ADC family targeting dual-channel, wideband digitization in space- and power-constrained systems-emphasizing channel matching, flexible reference configuration, and seamless integration with FPGA or ASIC digital backends.

FAQ

What is the maximum analog input frequency supported by the MAX1195ECM+D?

The MAX1195ECM+D features a 400MHz (–3dB) full-power input bandwidth, allowing accurate sampling of analog signals up to ~100MHz in undersampling applications. Its specified dynamic performance (e.g., 48.5dB SINAD) is guaranteed at 20MHz input frequency under standard test conditions (fCLK = 40MHz, –1dB FS), but the wideband T/H amplifier enables use beyond Nyquist with appropriate anti-alias filtering.

Does the MAX1195ECM+D support single-ended analog inputs?

Yes, the MAX1195ECM+D supports both fully differential and single-ended analog inputs. For single-ended operation, connect the signal source to INA+ or INB+, and tie INA– or INB– to COM. However, differential mode is recommended for best noise immunity and dynamic performance; single-ended use requires careful layout to avoid common-mode noise coupling.

How does the reference configuration affect the full-scale range of the MAX1195ECM+D?

The MAX1195ECM+D full-scale range is defined by the differential voltage ∆VREF = VREFP – VREFN. In internal reference mode (∆VREF = 1.024V ±3%), the range is ±1.024V. With buffered external reference, ∆VREF = VREFIN, adjustable via REFIN. In unbuffered mode, ∆VREF is set externally across REFP/REFN, supporting custom ranges up to ±10% tolerance - enabling adaptation to diverse sensor output spans.

What is the latency of the MAX1195ECM+D and how is it measured?

The MAX1195ECM+D has a fixed 5-clock-cycle latency from CLK rising edge to valid digital output. This is measured as the delay between the sampling instant (aperture point) and the appearance of corresponding data on D7A–D0A/D7B–D0B outputs, confirmed in Figure 3 of the datasheet. Latency remains constant across input frequencies and operating modes, simplifying timing-critical FPGA synchronization.

Can the MAX1195ECM+D operate with different supply voltages for analog and digital sections?

Yes, the MAX1195ECM+D separates analog (VDD = 2.7V–3.6V) and digital output (OVDD = 1.7V–3.6V) supplies. This allows interfacing with lower-voltage logic families (e.g., 1.8V FPGA I/O) while maintaining optimal analog performance at 3V. OGND must be tied to system ground, and separate bypassing (2.2µF || 0.1µF) is required on both VDD and OVDD rails.