Analog Devices Inc./Maxim Integrated MAX1189BCUI+

Overview

MAX1189BCUI+ from Maxim Integrated is a 16-bit, 135ksps successive-approximation ADC with ±10V bipolar analog input range, single +4.75V to +5.25V analog supply, and 16-bit parallel interface. It features ±2LSB integral nonlinearity, -100dB THD, and operates across 0°C to +70°C in a 28-pin TSSOP package - ideal for precision industrial process control and instrumentation requiring high DC accuracy and low distortion.

For engineers reviewing the MAX1189BCUI+ datasheet, MAX1189BCUI+ pinout, MAX1189BCUI+ application, or MAX1189BCUI+ equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, and two confirmed alternative parts for industrial data-acquisition systems where ±10V input range and 16-bit resolution are mandatory.

Technical Context

The MAX1189BCUI+ uses an internal SAR architecture with integrated track-and-hold, enabling true bipolar ±10V input scaling while operating from a single +5V analog supply. Its factory-trimmed internal +4.096V reference supports 16-bit offset-binary coding and delivers ±2LSB INL over temperature.

Power management is controlled via R/C and CS timing: second falling edge of CS selects standby (reference on) or shutdown (reference off), with 12ms wake-up required from shutdown. Conversion completes in 4.7µs max after hold mode initiation, and EOC signals data readiness for parallel bus readout.

Key Specifications

Pinout & Package

MAX1189BCUI+ is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP), 4.4mm × 9.7mm body, 0.65mm pitch, with exposed pad for thermal enhancement. Pin 1 is marked by a dot or beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1189BCUI+, ADS8860IDRCT trades ±10V input and parallel simplicity for speed and serial interface, while AD7606BSTZ adds channel count and simultaneity at the cost of footprint and power - making MAX1189BCUI+ optimal for compact, single-channel ±10V industrial DAQ where parallel throughput and low quiescent current are critical.

Availability

MAX1189BCUI+ is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and I/O modules requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for MAX1189BCUI+ 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 MAX1179/MAX1187/MAX1189 family was engineered specifically for high-accuracy, low-power, single-supply data acquisition in space- and power-constrained environments where ±10V bipolar input support and 16-bit resolution are essential.

FAQ

What is the analog input voltage range supported by the MAX1189BCUI+?

The MAX1189BCUI+ supports a bipolar analog input voltage range of ±10V relative to AGND. This is confirmed in the General Description and Electrical Characteristics sections of the datasheet, where VAIN is explicitly specified as -10V to +10V for the MAX1189 variant. The input scaler circuit enables this extended range while operating from a single +5V analog supply, eliminating external level-shifting components in many industrial sensor interfaces.

Does the MAX1189BCUI+ include an internal voltage reference?

Yes, the MAX1189BCUI+ includes a factory-trimmed internal voltage reference that outputs +4.096V at the REF pin. The datasheet specifies VREF as 4.056V to 4.136V (min/max) at +25°C, with ±35ppm/°C tempco. REFADJ allows fine adjustment or selection of external reference mode when tied to AVDD. Internal reference operation consumes 6.2mA total supply current at 135ksps, versus 5.3mA with external reference.

What package type and pin count does the MAX1189BCUI+ use?

The MAX1189BCUI+ is packaged in a 28-pin Thin Shrink Small Outline Package (TSSOP) with 0.65mm pitch and 4.4mm × 9.7mm body dimensions. This is confirmed in the Ordering Information table and Pin Configuration diagram. The "BCUI" suffix denotes the commercial temperature grade (0°C to +70°C) and TSSOP package - consistent across the MAX1179/MAX1187/MAX1189 family.

How does the MAX1189BCUI+ manage power consumption during idle periods?

The MAX1189BCUI+ implements AutoShutdown™ via the R/C pin: holding R/C high on the second falling edge of CS places the device into shutdown mode, reducing total supply current to 0.5µA (typ). In standby mode (R/C low), current drops to 3.7mA (typ) with reference active. Wake-up from shutdown requires ≥12ms for internal reference settling before accurate conversion - a timing constraint documented in Applications Information.

What is the digital interface type and data format used by the MAX1189BCUI+?

The MAX1189BCUI+ uses a 16-bit wide parallel interface with three-state outputs (D0–D15), where D0 is LSB and D15 is MSB. Data is output in offset-binary format: -10V maps to 0x0000, 0V to 0x8000, and +10V to 0xFFFF. Valid data appears on the bus after the third falling edge of CS when R/C is high, synchronized to the EOC signal - as defined in the Pin Description and Timing Characteristics sections.