Analog Devices Inc./Maxim Integrated MAX1093BEEG

Overview

The MAX1093BEEG from Maxim Integrated is a 10-bit successive-approximation ADC with 4-channel single-ended or 2-channel pseudo-differential analog input multiplexing, +2.5V internal reference, byte-wide parallel (8+2) interface, and operation from a single +3V analog supply with user-adjustable digital logic level (+1.8V to +3.6V). It delivers 250ksps sampling rate, ±0.5 LSB INL, and 5.7mW power at full speed-ideal for portable patient monitoring and industrial data-acquisition systems.

For engineers reviewing the MAX1093BEEG datasheet, MAX1093BEEG pinout, MAX1093BEEG application, or MAX1093BEEG equivalent, this page provides verified technical context, real-world design meanings of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for volume procurement and BOM continuity.

Technical Context

The MAX1093BEEG implements a charge-redistribution SAR architecture with integrated track/hold, supporting both internal and external clock modes via D6/D7 control bits. Its analog front-end enables software-configurable unipolar/bipolar and single-ended/pseudo-differential operation through an 8-bit control byte that selects channel, acquisition mode (internal/external), and power-down state.

Conversion timing is deterministic: 13 clock cycles per conversion, with aperture jitter as low as 50ps in external acquisition mode. The device uses a 12pF capacitive DAC and features tri-state digital outputs controlled by CS, RD, and HBEN, allowing flexible interfacing with microprocessors without external bus buffers.

Key Specifications

Pinout & Package

The MAX1093BEEG is housed in a 24-pin QSOP package (5.3mm × 7.6mm, 0.65mm pitch), optimized for high-density PCB layouts in portable instrumentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit parallel ADC applications.

Compared with MAX1092BEEG and ADS7822U, the MAX1093BEEG uniquely balances 250ksps parallel throughput, +3V operation with flexible VLOGIC, and 4-channel integration-making it optimal for space- and power-constrained embedded systems requiring µP interrupt-driven acquisition.

Availability

MAX1093BEEG is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, energy meter data logging, and touch screen controller interfaces requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for MAX1093BEEG 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 and mixed-signal ICs for demanding industrial, medical, and communications applications.

The MAX1093BEEG belongs to Maxim's low-power, high-speed parallel ADC product line-engineered specifically for battery-operated and space-constrained data-acquisition systems needing minimal external components and deterministic timing.

FAQ

What is the operating temperature range for the MAX1093BEEG?

The MAX1093BEEG is rated for -40°C to +85°C, matching industrial and medical environmental requirements. This grade is confirmed by the "E" suffix in the part number and validated in the Absolute Maximum Ratings table. The device maintains ±0.5 LSB INL and stable 2.5V reference performance across this full range, with TCREF specified at ±2ppm/°C. No derating or external thermal compensation is required for operation within these limits.

Does the MAX1093BEEG require an external clock to operate?

No, the MAX1093BEEG supports both internal and external clock modes. When D7=1 and D6=0 in the control byte, the internal 3MHz clock is enabled-eliminating need for external oscillator. In this mode, CLK pin must be tied to VDD or GND to prevent floating. External clock mode (D7=D6=1) accepts 100kHz–4.8MHz TTL/CMOS signals and is preferred for lowest aperture jitter (50ps) in precision sampling applications.

How many analog input channels does the MAX1093BEEG support in single-ended mode?

The MAX1093BEEG supports exactly four single-ended analog input channels (CH0–CH3), as explicitly defined in the General Description and Pin Configurations section. This is distinct from the MAX1091 (8-channel) and is confirmed by the MAX1093-specific Figure 3b schematic and Table 3. Channel selection is performed via A2–A0 bits in the control byte, with no hardware modification needed to switch between channels.

Can the MAX1093BEEG interface directly with a +1.8V microprocessor?

Yes, the MAX1093BEEG can interface directly with a +1.8V microprocessor using its VLOGIC pin. When VLOGIC is supplied at +1.8V, all digital outputs (D0–D9, INT, RD, WR, CS) are guaranteed to meet VOH ≥ 1.5V and VOL ≤ 0.5V under load, satisfying standard 1.8V CMOS logic thresholds. This eliminates level-shifting circuitry and is validated in the Digital Inputs and Outputs section of the Electrical Characteristics table.

What is the purpose of the HBEN pin on the MAX1093BEEG?

The HBEN (High Byte Enable) pin on the MAX1093BEEG controls multiplexing of the 10-bit conversion result onto the 8-bit data bus. When HBEN = 1, D1/D9 and D0/D8 carry the two most significant bits (D9, D8); when HBEN = 0, D7–D0 carry the eight least significant bits (D7–D0). This allows full 10-bit readout using standard 8-bit µP buses without requiring wider data paths or additional address lines.