Analog Devices Inc./Maxim Integrated MAX1177CEUP+T

Overview

MAX1177CEUP+T from Maxim Integrated is a 16-bit, 135ksps successive-approximation ADC with 0V to +10V analog input range, single +4.75V to +5.25V analog supply, and byte-wide parallel interface. It features ±3 LSB INL, -100dB THD, and AutoShutdown™ reducing current to 0.5µA - ideal for precision industrial process control and battery-powered data-acquisition systems.

For engineers reviewing the MAX1177CEUP+T datasheet, MAX1177CEUP+T pinout, MAX1177CEUP+T application, or MAX1177CEUP+T equivalent, key selection considerations include its extended temperature range (-40°C to +85°C), internal +4.096V reference, TSSOP-20 package, and dual-mode power-down (standby/shutdown) controlled via R/C pin timing.

Technical Context

The MAX1177CEUP+T implements a SAR architecture with integrated track-and-hold and factory-trimmed internal clock, eliminating external timing components. Its input scaler enables direct 0–10V conversion from a single +5V analog rail, while separate AVDD/DVDD supplies support interfacing with +2.7V to +5.25V logic.

Power management is controlled by R/C pin state during the second CS falling edge: low enables standby mode (3.7mA typ, reference active), high triggers shutdown mode (0.5µA typ, reference powered down). Conversion completes in 4.7µs max after acquisition, with EOC signaling completion and HBEN enabling byte-multiplexed D0–D15 output access.

Key Specifications

Pinout & Package

MAX1177CEUP+T is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP) with 0.65mm pitch, 4.4mm body width, and exposed pad not electrically connected. The package supports automated assembly and provides thermal performance suitable for continuous 135ksps operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS8860IDRCT and AD7682BRMZ, the MAX1177CEUP+T uniquely combines 0–10V direct input, internal +4.096V reference, byte-wide parallel interface, and -40°C to +85°C qualification - making it optimal for industrial I/O modules where analog signal range, interface simplicity, and environmental robustness are critical.

Availability

MAX1177CEUP+T is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and battery-powered data-acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for MAX1177CEUP+T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX1177CEUP+T belongs to Maxim's precision data-acquisition ADC family, designed specifically for applications demanding high DC accuracy, low power, and simplified system integration in harsh environments.

FAQ

What is the maximum sampling rate of the MAX1177CEUP+T?

The MAX1177CEUP+T achieves a maximum sampling rate of 135ksps, with a guaranteed conversion time of 4.7µs after acquisition. This rate supports Nyquist-limited signal bandwidths up to approximately 67kHz and is maintained across the full -40°C to +85°C operating temperature range specified for the MAX1177CEUP+T.

Does the MAX1177CEUP+T require an external reference voltage?

No, the MAX1177CEUP+T includes a factory-trimmed internal reference providing +4.096V at the REF pin, usable directly with 10µF bypass capacitance. An external reference can be applied via REF or REFADJ only if higher precision or different voltage is needed - the MAX1177CEUP+T operates fully functional with its internal reference enabled.

How does the AutoShutdown™ feature work on the MAX1177CEUP+T?

AutoShutdown™ on the MAX1177CEUP+T is activated by setting the R/C pin high during the second falling edge of CS, which powers down the internal reference and buffer after conversion. This reduces total supply current to 0.5µA (typ), significantly extending battery life in intermittent-sampling applications while maintaining full functionality upon wake-up.

What is the purpose of the HBEN pin on the MAX1177CEUP+T?

The HBEN (High-Byte Enable) pin on the MAX1177CEUP+T controls multiplexing of the 16-bit conversion result onto the 8-bit data bus: when HBEN is high, D8–D15 (MSB byte) appear on D0–D7; when low, D0–D7 (LSB byte) are presented. This allows byte-wide microcontrollers to read the full result without requiring 16-bit I/O ports.

Can the MAX1177CEUP+T interface directly with a 3.3V microcontroller?

Yes, the MAX1177CEUP+T supports DVDD from +2.7V to +5.25V, so it can operate with a 3.3V digital supply. Its digital outputs meet VOH ≥ DVDD – 0.4V and VOL ≤ 0.4V at 1.6mA sink, ensuring reliable logic-level compatibility with 3.3V µCs - no level-shifting circuitry is required when DVDD = 3.3V.

What is the analog input impedance of the MAX1177CEUP+T?

The MAX1177CEUP+T exhibits an analog input resistance of 5.3kΩ in normal operation and 5.3kΩ in shutdown mode, as specified in the Electrical Characteristics table. This value reflects the effective impedance seen at the AIN pin due to the internal input scaler network and must be considered when selecting external drive amplifiers to maintain 16-bit accuracy.