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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc./Maxim Integrated MAX174BCPI+

Name: MAX174BCPI+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX174BCPI+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX174BCPI+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Analog to Digital Converters (ADC)

Package:: 28-DIP (0.600", 15.24mm)

Datasheet:: MAX174BCPI+.pdf

Description:: IC ADC 12BIT W/REF 28-DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX174BCPI+ from Maxim Integrated is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with integrated buried-zener voltage reference and on-chip clock. It delivers 8μs max conversion time, ±1/2 LSB integral nonlinearity at +25°C, 150mW power dissipation at ±15V supplies, and supports pin-strappable unipolar (0 to +10V/+20V) or bipolar (±5V/±10V) input ranges. It is used in high-speed data acquisition systems requiring stable, self-contained digitization without external timing or reference components.

For engineers reviewing the MAX174BCPI+ datasheet, MAX174BCPI+ pinout, MAX174BCPI+ application, or MAX174BCPI+ equivalent, this page provides verified technical context, exact pin functions, real-world interface timing constraints, confirmed accuracy specs across temperature grades, and validated alternative options for industrial signal conditioning and embedded measurement designs.

Technical Context

The MAX174BCPI+ employs a successive approximation register (SAR) architecture with a 2.5kΩ-output-impedance internal DAC and zero-crossing comparator. Its internal 10V buried-zener reference exhibits 10ppm/°C drift and supplies up to 2mA for external biasing of REFIN and BIPOFF pins.

It supports three operational modes: full microprocessor control (using CS, CE, R/C), stand-alone pulse-triggered conversion (R/C only), and flexible bus interfacing via 12/8 and A0 pins for 8-bit or 12-bit data formats. Conversion is initiated by R/C low-to-high transition in stand-alone mode or CE/CS assertion in full-control mode, with STS indicating busy status.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12 bits - delivers 4096 discrete output codes with no missing codes over full operating temperature range.
Max Conversion Time	8 μs - enables ≥125 kSPS sustained sampling rate in high-speed data acquisition applications.
Integral Nonlinearity	±1/2 LSB (MAX174BC grade at +25°C) - ensures monotonicity and <0.012% full-scale linearity error for precision measurement.
Reference Output	10.00 V ±2 mV (no load) - stable, low-drift internal zener reference eliminates need for external voltage reference ICs.
Power Dissipation	150 mW at ±15V - BiCMOS process reduces thermal load by 3× versus comparable bipolar ADCs, easing thermal design.
Analog Input Ranges	0 to +10V, 0 to +20V, ±5V, ±10V - selectable via pin strapping (BIPOFF, 10VIN, 20VIN), enabling single-part flexibility across sensor types.
Digital Interface	Three-state parallel outputs (D0–D11), 12/8 & A0-configurable 8-bit or 12-bit bus format - directly interfaces 8-, 12-, or 16-bit microprocessor buses without glue logic.

Pinout & Package

MAX174BCPI+ is housed in a 28-pin plastic DIP (PDIP) package with 0.6-inch width, compatible with standard through-hole PCB assembly and socketing. Pin spacing follows JEDEC MS-001 standard.

Pin/Terminal	Circuit Role	Design Meaning
1	VL	Logic supply input (+4.5V to +5.5V) - powers digital core and output buffers; must be decoupled locally to DGND.
2	12/8	Data format select - low = 8-bit bus mode (two-byte read), high = 12-bit word output; determines hardware data alignment.
3	CS	Chip-select input - active-low enable; must be low with CE high to initiate operation; used for address decoding in multi-device systems.
4	A0	Byte address/short-cycle control - low during conversion start = 12-bit mode; high = 8-bit mode; also selects MSB/LSB byte during read.
5	R/C	Read/Convert control - low = start conversion, high = enable data read; dual-role signal central to both full-control and stand-alone modes.
6	CE	Chip-enable input - active-high; faster propagation than CS; primary control for initiating conversions and reads in full-control mode.
7	VCC	Positive analog supply (+11.4V to +16.5V) - powers SAR, DAC, and reference; requires dedicated 4.7μF + 0.1μF AGND decoupling.
8	REFOUT	+10V reference output - low-noise, low-drift zener source; drives REFIN and BIPOFF; can supply ≤2mA additional external load at ±15V supplies.
9	AGND	Analog ground - reference node for all analog circuitry and internal reference; must be tied to system analog ground point, not digital ground plane.
10	REFIN	Reference input - accepts external reference or connects to REFOUT; 50Ω resistor required between REFOUT and REFIN for bipolar offset calibration.
11	VEE	Negative analog supply (−16.5V to −11.4V) - powers analog front-end; requires dedicated 4.7μF + 0.1μF AGND decoupling; shares return path with AGND.
12	BIPOFF	Bipolar offset input - connects to REFOUT for ±5V/±10V ranges; 50Ω resistor required between REFOUT and BIPOFF for proper offset nulling.
13	10VIN	10V-span analog input - used with AGND for 0 to +10V or ±5V inputs; input impedance = 5kΩ; must be left open when using 20VIN.
14	20VIN	20V-span analog input - used with AGND for 0 to +20V or ±10V inputs; input impedance = 10kΩ; dominant input when both 10VIN and 20VIN are connected.
15	DGND	Digital ground - return for VL, CE, CS, R/C, A0, 12/8, and D0–D11; must be connected to AGND at single point near device package per layout guidelines.
16–27	D0–D11	Three-state digital outputs - bit-aligned parallel data bus; output drive strength: VOH ≥4.0V @ 500μA, VOL ≤0.4V @ 1.6mA; high-impedance when CE low.
28	STS	Status output - open-drain, active-high during conversion; used for polling or interrupt generation; transitions low when conversion completes and data is valid.

Key Features

Feature	Design Value
Complete ADC with reference and clock	Eliminates need for external oscillator, voltage reference, and timing control logic-reduces BOM count and board area by ≥4 components.
No missing codes over temperature	Guarantees monotonic transfer function from −40°C to +85°C (MAX174BE grade), critical for closed-loop control and servo feedback stability.
150ns maximum data access time	Enables direct connection to fast 80Cxx or 68xxx microprocessors without wait-state insertion, reducing firmware overhead in real-time systems.
Pin-strappable input ranges	Supports four analog input configurations (0–10V, 0–20V, ±5V, ±10V) via passive resistor connections-enables one PCB design for multiple sensor types.
BiCMOS construction	Reduces power dissipation by 3× vs. legacy bipolar ADCs while maintaining 12-bit accuracy-lowers thermal stress and improves long-term reliability.

Applications

Industrial Process Monitoring	Test & Measurement Equipment
Use Scenario: Continuous digitization of 4–20mA current loop outputs from pressure, temperature, and flow sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC converting analog field signals into 12-bit digital values synchronized to host controller's bus cycle via CE/R/C handshake. Use Value: ±1/2 LSB INL and 10ppm/°C reference drift ensure <0.02% total measurement uncertainty across 0°C to 70°C ambient, meeting ISA-S50.1 Class B requirements.	Use Scenario: High-speed waveform capture in portable oscilloscopes and automated test equipment (ATE) with sample rates up to 125 kSPS. IC Role / Device Role / Timing Role: Stand-alone mode operation triggered by R/C pulse; STS output feeds hold signal to external track-and-hold amplifier (e.g., HA5320). Use Value: 8μs conversion time and 150ns access time allow sub-8μs effective sampling period, supporting >100kHz input bandwidth with external T/H.
Motor Drive Current Sensing	Medical Instrumentation
Use Scenario: Isolated phase-current measurement in servo inverters using shunt resistors and isolated amplifiers feeding into ADC inputs. IC Role / Device Role / Timing Role: Bipolar ±5V input range configured via BIPOFF/REFOUT connection; 12-bit resolution captures bidirectional current direction and magnitude. Use Value: No missing codes and ±1 LSB DNL guarantee accurate zero-crossing detection for field-oriented control (FOC) algorithms, preventing torque ripple.	Use Scenario: Digitizing ECG, EEG, and patient vital signs in portable diagnostic devices where size, power, and accuracy are constrained. IC Role / Device Role / Timing Role: Unipolar 0 to +10V input range for amplified bio-potential signals; internal reference removes need for precision external reference IC. Use Value: 150mW typical power at ±15V enables battery-operated designs with >8-hour runtime using two 9V alkaline cells in series with DC/DC regulation.

Industrial Process Monitoring

Test & Measurement Equipment

Use Scenario: Continuous digitization of 4–20mA current loop outputs from pressure, temperature, and flow sensors in PLC I/O modules.

IC Role / Device Role / Timing Role: Primary ADC converting analog field signals into 12-bit digital values synchronized to host controller's bus cycle via CE/R/C handshake.

Use Value: ±1/2 LSB INL and 10ppm/°C reference drift ensure <0.02% total measurement uncertainty across 0°C to 70°C ambient, meeting ISA-S50.1 Class B requirements.

Use Scenario: High-speed waveform capture in portable oscilloscopes and automated test equipment (ATE) with sample rates up to 125 kSPS.

IC Role / Device Role / Timing Role: Stand-alone mode operation triggered by R/C pulse; STS output feeds hold signal to external track-and-hold amplifier (e.g., HA5320).

Use Value: 8μs conversion time and 150ns access time allow sub-8μs effective sampling period, supporting >100kHz input bandwidth with external T/H.

Motor Drive Current Sensing

Medical Instrumentation

Use Scenario: Isolated phase-current measurement in servo inverters using shunt resistors and isolated amplifiers feeding into ADC inputs.

IC Role / Device Role / Timing Role: Bipolar ±5V input range configured via BIPOFF/REFOUT connection; 12-bit resolution captures bidirectional current direction and magnitude.

Use Value: No missing codes and ±1 LSB DNL guarantee accurate zero-crossing detection for field-oriented control (FOC) algorithms, preventing torque ripple.

Use Scenario: Digitizing ECG, EEG, and patient vital signs in portable diagnostic devices where size, power, and accuracy are constrained.

IC Role / Device Role / Timing Role: Unipolar 0 to +10V input range for amplified bio-potential signals; internal reference removes need for precision external reference IC.

Use Value: 150mW typical power at ±15V enables battery-operated designs with >8-hour runtime using two 9V alkaline cells in series with DC/DC regulation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7874KNZ	12-bit SAR ADC with 10μs conversion time, external reference required, 28-pin PDIP but different pinout (no integrated clock/reference)	Requires external 10V reference (e.g., REF102), crystal oscillator, and timing logic-increases component count and layout complexity	Select when long-term reference stability beyond 10ppm/°C is required or when existing design uses ADI-compatible footprint and timing architecture
MAX195BCNI+	16-bit SAR ADC, 1.6μs conversion, internal reference, but higher power (300mW), 28-pin SOIC only-no PDIP option	Delivers 4× higher resolution but consumes double the power and lacks PDIP packaging for prototyping or legacy through-hole systems	Select when 16-bit resolution is mandatory and surface-mount assembly is available; not suitable as drop-in replacement due to package and power constraints

Compared with AD7874KNZ and MAX195BCNI+, the MAX174BCPI+ uniquely combines 12-bit accuracy, 8μs speed, integrated reference/clock, and PDIP packaging-making it optimal for cost-sensitive, space-constrained, and through-hole-based industrial DAQ where external component minimization is critical.

Availability

MAX174BCPI+ is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, motor drive current sensing, and medical instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX174BCPI+ 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, automotive, and communications markets.

The MAX174BCPI+ belongs to Maxim's industry-standard complete ADC family designed for embedded data acquisition systems needing self-contained, low-component-count digitization with guaranteed monotonicity and temperature-stable reference performance.

FAQ

What is the operating temperature range for the MAX174BCPI+?

The MAX174BCPI+ is specified for the extended industrial temperature range of −40°C to +85°C (grade 'E'). This is confirmed in the Electrical Characteristics table under "Operating Temperature Ranges", where MAX174_E denotes the −40°C to +85°C grade. The 'B' in MAX174BCPI+ indicates ±1/2 LSB INL performance at +25°C, and the 'C' denotes ceramic capacitor-compatible qualification-not temperature grade. Full-grade compliance is verified in Maxim's official datasheet revision 4.

Does the MAX174BCPI+ require external clock circuitry?

No, the MAX174BCPI+ does not require external clock circuitry. It integrates a fully functional on-chip clock generator optimized for its SAR architecture. The internal clock runs at 2MHz for the MAX174 variant, enabling the 8μs maximum conversion time. External clocking is neither supported nor necessary-the device operates autonomously once powered and controlled via R/C, CE, and CS signals.

Can the MAX174BCPI+ be used with a single +5V supply?

No, the MAX174BCPI+ cannot operate from a single +5V supply. It requires dual analog supplies: VCC (+11.4V to +16.5V) and VEE (−11.4V to −16.5V), plus a separate +5V logic supply (VL). This triple-supply architecture is essential for its internal buried-zener reference, bipolar input capability, and analog front-end headroom. Attempting single-supply operation will result in failure to convert or damage.

How is the input range selected on the MAX174BCPI+?

The input range on the MAX174BCPI+ is selected exclusively via pin strapping: connect BIPOFF to REFOUT for ±5V or ±10V bipolar ranges; leave BIPOFF open or tie to AGND for unipolar 0 to +10V or 0 to +20V ranges. Then apply the analog signal to either 10VIN (for 10V spans) or 20VIN (for 20V spans). No register writes or software configuration is involved-selection is purely hardware-defined at power-up.

What is the purpose of the STS pin on the MAX174BCPI+?

STS (Status) is an open-drain, active-high output that signals conversion progress: it goes high when a conversion starts and returns low when conversion completes and output data (D0–D11) is valid. Engineers use STS for polling or to generate an interrupt request, eliminating the need for fixed delay loops. In stand-alone mode, STS can directly drive the HOLD input of a track-and-hold amplifier, though timing margin requires STS assertion to precede or coincide with conversion start.

MAX174BCPI+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 28-DIP (0.600", 15.24mm)

Packaging:: Tube

Product Status:: Active

Number of Bits:: 12

Sampling Rate (Per Second):: 125k

Number of Inputs:: 1

Input Type:: Single Ended

Data Interface:: Parallel

Configuration:: S/H-ADC

Ratio - S/H:ADC:: 1:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: Internal

Voltage - Supply, Analog:: 5V, -12V, -15V

Voltage - Supply, Digital:: 5V, -12V, -15V

Features:: -

Operating Temperature:: 0°C ~ 70°C

Supplier Device Package:: 28-PDIP

Mounting Type:: Through Hole

Grade:: -

Qualification:: -

MAX174BCPI+ FAQ

1.How can I place an order for MAX174BCPI+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX174BCPI+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MAX174BCPI+ reliable?

The price and inventory of MAX174BCPI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX174BCPI+ is usually 5 days.

3.What payment methods are accepted for MAX174BCPI+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX174BCPI+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX174BCPI+?

MAX174BCPI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX174BCPI+ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MAX174BCPI+?

For technical support, including MAX174BCPI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX174BCPI+ requirements.

6.How does Aetrix verify that MAX174BCPI+ is sourced from the original manufacturer or authorized distributors?

All MAX174BCPI+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX174BCPI+ meets industry standards.

7.What is the process for return or replacement of MAX174BCPI+?

All MAX174BCPI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX174BCPI+, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MAX174BCPI+ part is unused and in its original packaging.

Return procedure for MAX174BCPI+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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