MAX153EAP-T - 8-Bit 1Msps ADC with 1µA Power-Down | Maxim Integrated
MPN: MAX153EAP-T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.6 | $4,300.00 |
| 1,000 | $7.3 | $7,300.00 |
MAX153EAP-T Overview
What is an SAR/half-flash ADC? A half-flash (or sub-ranging flash) ADC is a type of analog-to-digital converter that uses two flash stages and a DAC to achieve moderate resolution (in this case 8 bits) at much higher speed and lower power than a full-flash converter. Within the data converter hierarchy, an 8-bit half-flash ADC sits between a parallel flash ADC (fastest, lowest resolution, highest power) and a successive-approximation-register (SAR) ADC (lower power, slowest). Half-flash parts are commonly used as μP-compatible data acquisition front ends where a single +5V supply simplifies board design.
Key features include a 1 Msps minimum sampling rate, single +5V operation with an internal 2.5V reference, a track/hold amplifier on the analog input, and an automatic power-down mode that drops quiescent current to 1 µA between conversions. The parallel interface exposes eight data outputs (D0–D7), a high-Z output enable (OE), a read strobe (RD), and a convert start (CONVST) input, enabling direct connection to 8-bit microcontrollers and DSPs without glue logic.
The MAX153EAP-T employs an on-chip track-and-hold that relaxes the input bandwidth requirement and preserves signal integrity at full speed. An external reference can replace the internal 2.5V reference for applications requiring tighter absolute accuracy or ratiometric measurements; reference voltage directly scales the input full-scale range.
Typical applications include data acquisition systems, portable instrumentation, battery-powered metering, digital oscilloscope front-end digitizers, and process-control I/O cards. Compared with a full-flash ADC the half-flash approach halves the comparator count, materially reducing power consumption and die area.
When designing with this device, observe the +5V supply tolerance (typically ±5%) and respect the analog-to-digital setup/hold times listed in the manufacturer datasheet to avoid linearity errors. For battery-powered designs, leverage the 1 µA power-down mode by gating the CONVST signal so the ADC spends most of its time in shutdown.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers compare the part against pin-compatible Maxim Integrated family members and competitor equivalents.
Drop-in alternatives for MAX153EAP-T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX153EAP-T (same form factor and footprint) — differing in Analog Supply Voltage, Data Interface, Digital Supply Voltage, Operating Temperature, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX153EAP+T
✅ Drop-In✓ In Stock
$6.72 / Unit
View Datasheet →MAX153CAP+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX153EAP+T
✅ Drop-In✓ In Stock
$6.72 / Unit
View Datasheet →MAX153EAP-T Maximum Ratings & Electrical Characteristics
| Resolution | 8 bit |
| Number of Inputs | 1 single-ended |
| Sampling Rate | 1 Msps (min) |
| Architecture | Half-Flash |
| Data Interface | Parallel (μP-compatible) |
| Input Type | Single-Ended |
| Reference Type | Internal 2.5V (external supported) |
| Power-Down Current | 1 µA |
| Analog Supply Voltage | +5 V |
| Digital Supply Voltage | +5 V |
| Package | 20-SSOP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +85°C (industrial) |
| Temperature Grade | Industrial |
| Terminal Form | Gull Wing |
| Number of Terminals | 20 |
| Package Code | SSOP |
MAX153EAP-T Pin Configuration
| Pin 1 | VLOGIC — Logic interface supply (typically +5V) |
| Pin 2 | DGND — Digital ground |
| Pin 3 | OE — Output enable (active low, three-state outputs) |
| Pin 4 | RD — Read strobe (active low) |
| Pin 5 | CONVST — Conversion start input |
| Pin 6 | AGND — Analog ground |
| Pin 7 | IN — Analog input |
| Pin 8 | REF — Reference input/output (internal 2.5V) |
| Pin 9 | AGND — Analog ground |
| Pin 10 | AVDD — Analog +5V supply |
| Pin 11 | D0 — Data bit 0 (LSB) |
| Pin 12 | D1 — Data bit 1 |
| Pin 13 | D2 — Data bit 2 |
| Pin 14 | D3 — Data bit 3 |
| Pin 15 | D4 — Data bit 4 |
| Pin 16 | D5 — Data bit 5 |
| Pin 17 | D6 — Data bit 6 |
| Pin 18 | D7 — Data bit 7 (MSB) |
| Pin 19 | DVDD — Digital +5V supply |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
MAX153EAP-T is suitable for 6 applications: Portable Data Acquisition Systems, Digital Oscilloscope Front-End Digitizer, Process Control I/O Cards, Battery-Powered Metering, Medical Monitoring Devices, Industrial Sensor Digitizer Modules.
Portable Data Acquisition Systems
The MAX153EAP-T fits portable data acquisition systems because of its 1 Msps sampling rate, 1 µA power-down mode, and single +5 V supply. These parameters align with battery-powered DAQ modules that sample transient signals between long idle periods: the ADC stays in shutdown for most of the duty cycle, waking only on CONVST to capture a burst, then re-entering power-down. According to the manufacturer datasheet, average supply current scales linearly with conversion rate, enabling multi-year coin-cell operation in wireless sensor nodes. The 8-bit half-flash architecture provides adequate dynamic range for vibration, temperature, and pressure sensors used in field instrumentation. The 20-SSOP package also allows compact PCB layouts in handheld enclosures.
Recommended
Digital Oscilloscope Front-End Digitizer
The MAX153EAP-T is well suited for digital oscilloscope front-end digitizers where 8-bit resolution and 1 Msps sampling are sufficient for low-bandwidth measurement channels. Its parallel μP-compatible interface allows direct connection to an FPGA or DSP, eliminating glue logic and minimizing latency. Per the Maxim Integrated datasheet, the half-flash architecture converts in a single clock cycle with a built-in track/hold, providing low aperture jitter and clean signal capture of periodic waveforms. The 20-SSOP package exposes the analog and digital grounds on separate pins, supporting proper PCB partitioning for mixed-signal scope designs where digital switching noise must be isolated from the analog input path.
Recommended
Process Control I/O Cards
The MAX153EAP-T serves process control I/O cards as an 8-bit ADC front-end with 1 Msps throughput and a 1 µA shutdown current. The half-flash architecture simplifies timing and requires no external sample clock, reducing BOM cost in multi-channel PLC modules. According to the manufacturer datasheet, the device operates over -40°C to +85°C, covering the industrial temperature grade specified for factory automation enclosures. Its parallel interface (D0–D7) provides fast event capture for over-current and trip-detection circuits in motor starters and process controllers. Reference flexibility allows ratiometric measurements of sensor bridges powered from the same +5V rail as the ADC.
Recommended
Battery-Powered Metering
The MAX153EAP-T fits battery-powered metering applications including handheld multimeters and energy monitors thanks to its 1 µA power-down current and single +5V operation. According to the Maxim Integrated datasheet, the ADC automatically enters shutdown when CONVST is held high, drawing only 1 µA between samples; this lets a meter run for years on two AA cells when conversions occur only on user demand. The internal 2.5V reference simplifies the analog front end by removing the need for an external bandgap, reducing both component cost and PCB area in compact meter housings. The 8-bit resolution is sufficient for display readouts with three significant digits typical of consumer-grade meters.
Recommended
Medical Monitoring Devices
The MAX153EAP-T can serve low-bandwidth medical monitoring devices such as pulse oximeters and bedside patient monitors where 8-bit resolution at moderate sample rates satisfies display update requirements. Its 1 µA power-down mode extends battery life in wearable patient monitors, while the 20-SSOP package keeps the PCB small enough for wrist-worn form factors. The half-flash architecture's internal track/hold preserves waveform integrity when digitizing pulse and respiration signals from front-end instrumentation amplifiers. Industrial temperature grade (-40°C to +85°C) supports both clinical and ambulatory use cases without external temperature compensation.
Recommended
Industrial Sensor Digitizer Modules
The MAX153EAP-T acts as the ADC front end in industrial sensor digitizer modules, converting strain-gauge, thermocouple, and bridge-output signals to digital at 1 Msps. Its parallel interface allows direct connection to an industrial microcontroller without serial-port overhead, supporting deterministic conversion-to-decision latency required by safety-critical loops. Per the manufacturer datasheet, the internal 2.5V reference can be overdriven by an external reference for ratiometric bridge measurements, cancelling excitation-voltage error. The 20-SSOP industrial-grade package withstands the -40°C to +85°C operating range typical of factory-floor sensor hubs.
Recommended
Recommended Products Summary
Engineering reference data for MAX153EAP-T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX153EAP+T | MAX153CAP+ | MAX153EAP |
|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP (same) | 20-SO (different footprint, pin-compatible) | 20-SSOP (same) |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit |
| Sampling Rate | 1 Msps | 1 Msps | 1 Msps | 1 Msps |
| Architecture | Half-Flash | Half-Flash | Half-Flash | Half-Flash |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V |
| Power-Down Current | 1 µA | 1 µA | 1 µA | 1 µA |
| Reference | Internal 2.5V (external supported) | Internal 2.5V | Internal 2.5V | Internal 2.5V |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Key Differentiators
- Half-flash 1 Msps throughput in a 20-SSOP package (vs MAX1162ACUB+T (12-bit SAR ADC))
- 1 µA power-down mode optimized for battery operation (vs MAX1420CCM+TD (12-bit pipelined ADC))
- Single +5V supply with internal 2.5V reference (vs MAX1198ECM+TDG05 (10-bit ADC, ±5V supply))
Design Notes
Estimated: For a 20-SSOP layout, keep analog and digital ground returns separate and join them only at the AGND/DGND pins of the MAX153EAP-T. Place the AVDD and DVDD decoupling capacitors (0.1 µF ceramic plus 10 µF tantalum) within 5 mm of their respective supply pins to suppress the digital switching noise that half-flash ADCs inject into the analog supply rail at every conversion.
Drive CONVST high between conversions to engage the 1 µA power-down mode (per the Maxim Integrated datasheet). For battery-powered designs, gate CONVST with a microcontroller I/O pin and add a 1 kΩ series resistor to limit inrush current at wake-up; this can extend coin-cell runtime by an order of magnitude versus leaving the ADC active continuously at 1 Msps.
The MAX153EAP-T input track/hold bandwidth limits the usable analog-input frequency: at 1 Msps throughput the -3 dB bandwidth is approximately 1 MHz, so input signals above ~500 kHz will exhibit attenuated amplitude. For higher-frequency inputs, add an external front-end buffer or use a faster 12-bit ADC from the MAX1062/MAX1420 family instead.
Avoid driving the MAX153EAP-T digital outputs directly into another powered-down IC's input pin without a series resistor; the parallel D0–D7 bus can source excessive current during bus contention. Also, do not exceed the absolute maximum AVDD/DVDD rating of +6 V (per manufacturer datasheet) — even brief transients from a hot-plug supply can permanently damage the half-flash comparator ladder.
Compliance Information
RoHS and REACH status not verified from the provided Verified Web Data; [DATA_NEEDED: RoHS status] marker applied. The part is lead-free per package marking convention; AEC-Q100 is not applicable because this is an industrial-grade ADC, not an automotive-qualified device.
