Analog Devices Inc./Maxim Integrated MAX152EAP

Overview

MAX152EAP from Maxim Integrated is an 8-bit, 400ksps analog-to-digital converter (ADC) using half-flash architecture for 1.8µs conversion time, operating from a single +3V supply with unipolar/bipolar input support and 1µA power-down current. It integrates internal track/hold, ratiometric reference inputs, and µP-compatible parallel interface - deployed in burst-mode data acquisition systems requiring rapid wake-up and low quiescent power.

For engineers reviewing the MAX152EAP datasheet, MAX152EAP pinout, MAX152EAP application, or MAX152EAP equivalent, this page delivers verified electrical specs, temperature-rated package mapping (-40°C to +85°C), functional interface timing modes (RD and WR-RD), and real-world ADC selection guidance for portable telecom and servo-loop designs.

Technical Context

The MAX152EAP implements a two-stage half-flash conversion: first, a 4-bit flash ADC resolves the MSBs; then an internal 4-bit DAC generates a residue voltage, which a second 4-bit flash stage converts into the LSBs - achieving full 8-bit resolution with only 15 comparators. This architecture enables deterministic 1.8µs conversion in RD mode and sub-2µs operation in optimized WR-RD mode (t_CWR = 1.8µs).

Digital control supports three operational modes: RD mode (MODE = 0) uses RD as conversion trigger and WR/RDY as ready-status output; WR-RD mode (MODE = 1) initiates conversion on WR falling edge and latches MSBs immediately, with LSBs available after INT assertion; stand-alone mode (CS = RD = GND) allows WR-only triggering. All modes feature three-state data outputs compatible with µP buses without external logic.

Key Specifications

Pinout & Package

MAX152EAP is packaged in a 20-pin plastic DIP (dual-in-line) with 0.300-inch body width and 0.100-inch lead pitch, rated for -40°C to +85°C operation. Pin 1 is VIN (analog input); pins 2–5 and 14–17 are D0–D7 (three-state data outputs, LSB to MSB); pin 6 is WR/RDY (write control / ready status); pin 7 is MODE (interface mode select); pin 8 is RD (read strobe); pin 9 is INT (conversion-complete interrupt); pin 10 is GND; pins 11–12 are VREF−/VREF+ (reference span terminals); pin 13 is CS (chip select); pin 18 is PWRDN (power-down enable); pin 19 is VSS (negative supply, 0V in unipolar mode); pin 20 is VDD (+3V supply).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, high-speed ADC applications.

Compared with ADS7822U and MAX11200EEE+, the MAX152EAP uniquely balances 8-bit resolution, 400ksps throughput, sub-2µs latency, and 1µA power-down - making it optimal for battery-constrained, event-driven acquisition where timing determinism and µP bus simplicity are critical.

Availability

MAX152EAP is available at Aetrix Electronics and suitable for cellular telephony, portable radio, and burst-mode data acquisition requiring stable component supply across industrial temperature ranges.

Supply support for MAX152EAP 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 industrial, automotive, and communications markets.

The MAX152EAP belongs to Maxim's high-speed data converter family, engineered specifically for µP-centric, low-power, real-time digitization in portable and battery-operated systems.

FAQ

What is the maximum sampling rate achievable with the MAX152EAP?

The MAX152EAP achieves a maximum sampling rate of 465ksps in WR-RD mode with t_RD < t_INTL, calculated as 1/(t_WR + t_RD + t_RI + t_P) = 1/(600ns + 800ns + 300ns + 450ns) ≈ 465kHz. This requires precise timing coordination between WR and RD pulses and is validated across the -40°C to +85°C range for MAX152EAP.

Does the MAX152EAP require an external clock source?

No, the MAX152EAP does not require an external clock. Its internal timing circuitry generates all necessary control signals from the WR, RD, and MODE inputs. Conversion timing is fully determined by the µP's strobe sequence - eliminating clock distribution complexity and jitter sensitivity in the MAX152EAP system design.

How does the ratiometric reference configuration work on the MAX152EAP?

The MAX152EAP's ratiometric operation uses VREF+ and VREF− to define the full-scale and zero-code points. When VREF+ is tied to VDD and VREF− to GND, the ADC output code becomes independent of VDD variation - e.g., a 1.5V input yields the same digital result whether VDD is 3.0V or 3.6V. This is implemented via internal resistor ladder tracking and is specified across the full -40°C to +85°C range for MAX152EAP.

What is the function of the MODE pin on the MAX152EAP?

The MODE pin on the MAX152EAP selects between two primary interface protocols: when MODE = 0 (internally pulled low), the device operates in RD mode where RD initiates conversion and WR/RDY acts as a ready signal; when MODE = 1, it enters WR-RD mode where WR starts conversion and RD reads the result. This dual-mode flexibility allows the MAX152EAP to adapt to different µP bus timing requirements without hardware changes.

Can the MAX152EAP operate with bipolar input signals?

Yes, the MAX152EAP supports bipolar inputs by configuring VREF− to a negative voltage (e.g., -1.5V) and VREF+ to a positive voltage (e.g., +1.5V), with VSS = -3.0V. In this mode, the input range becomes -1.5V to +1.5V, producing output codes from 0x00 (all zeros) at -1.5V to 0xFF (all ones) at +1.5V. Bipolar operation is fully characterized and guaranteed for MAX152EAP across its -40°C to +85°C rating.