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Analog Devices Inc./Maxim Integrated MAX1248BCPE+
- Part No.:
- MAX1248BCPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1248BCPE+.pdf
- Description:
- IC ADC 10BIT SAR 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:249
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Product details
Overview
MAX1248BCPE+ from Maxim Integrated is a 10-bit, 4-channel serial analog-to-digital converter (ADC) with integrated track/hold, 4-wire SPI/QSPI/MICROWIRE-compatible interface, internal 2.5V reference, and software-configurable unipolar/bipolar and single-ended/differential inputs. It operates from a single +2.7V to +5.25V supply, draws 1.2mA at 133ksps (+3V), and supports portable data logging and battery-powered instrumentation.
For engineers reviewing the MAX1248BCPE+ datasheet, MAX1248BCPE+ pinout, MAX1248BCPE+ application, or MAX1248BCPE+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in the official MAX1248/MAX1249 datasheet Rev 2 (5/98) and Maxim's product specifications for the BCPE grade.
Technical Context
The MAX1248BCPE+ uses successive-approximation architecture with an integrated track/hold circuit that acquires input signals in ≤1.5µs and supports both internal clock mode (7.5µs max conversion time) and external clock mode (15 SCLK cycles per conversion at 2MHz). Its analog front-end accepts 4 single-ended or 2 pseudo-differential inputs, with COM pin establishing zero-code reference and ±0.5LSB stability requirement.
It implements a three-level SHDN pin controlling power state (low = full shutdown, high = internal compensation, float = external compensation), and features a reference-buffer amplifier with ±1.5% REFADJ adjustment range and 2.06V/V gain. The 10-bit output is straight binary in unipolar mode and two's complement in bipolar mode, clocked MSB-first on SCLK falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes over full-scale range |
| Sampling Rate | 133ksps - supports real-time acquisition of signals up to ~65kHz full-power bandwidth |
| INL (Integral Nonlinearity) | ±0.5 LSB - ensures monotonicity and <0.05% full-scale error after calibration |
| Supply Current (Active) | 1.2mA at 133ksps, +3V - enables low-power operation in portable systems |
| Power-Down Current | 1µA - reduces system standby power by >1000× versus active mode |
| Reference | Internal 2.500V ±0.3% (TA = +25°C) - eliminates need for external reference component |
| Input Configuration | Software-selectable unipolar (0V to VREF) or bipolar (±VREF/2) - adapts to sensor signal polarity without hardware change |
Pinout & Package
MAX1248BCPE+ is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.300-inch body width, through-hole mounting, and industry-standard pin spacing (0.100" pitch). This package supports manual prototyping, socket-based testing, and legacy PCB layouts requiring DIP footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | VDD / DGND | Positive supply and digital ground - must be decoupled with 0.1µF ceramic capacitor near pin |
| 2–5 | CH0–CH3 | Analog input channels - configurable as 4 single-ended or 2 differential pairs (CH0/CH1, CH2/CH3) |
| 6 | COM | Common-mode reference - sets zero-code voltage in single-ended mode; requires ±0.5LSB stability |
| 7 | SHDN | Three-state shutdown control - low = full power-down, high = internal ref compensation, float = external ref compensation |
| 8 | VREF | Reference buffer output / ADC reference input - provides 2.500V nominal output (MAX1248 only) |
| 9 | REFADJ | Reference buffer adjust input - ±1.5% fine-tuning range; tie to VDD to disable buffer |
| 12, 13 | DOUT / SSTRB | Data output and serial strobe - DOUT is three-state; SSTRB pulses high before MSB in external clock mode |
| 14–16 | DIN / SCLK / CS | Serial interface inputs - compatible with SPI (CPOL=0, CPHA=0), QSPI, and MICROWIRE protocols |
| 10 | AGND | Analog ground - must be separated from DGND and connected at single point to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| 4-wire serial interface | Direct connection to SPI/QSPI/MICROWIRE controllers without level shifters or glue logic |
| Internal 2.5V reference | Eliminates external reference IC and associated passive components, reducing BOM count and board area |
| Software-configurable input mode | Runtime selection of unipolar/bipolar and single-ended/differential via control byte - no hardware rework needed |
| Low-power shutdown | 1µA shutdown current enables energy harvesting and ultra-low-duty-cycle sensing applications |
| Track/hold acquisition time | ≤1.5µs minimum - supports high-speed sampling without external sample-hold circuitry |
Applications
| Portable Data Logging | Medical Instruments |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over extended periods. IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs with 10-bit precision while minimizing active current draw between samples. Use Value: 1.2mA active current and 1µA shutdown enable multi-week operation on coin-cell batteries. |
Use Scenario: Portable ECG monitor acquiring lead-II differential biopotential signals with low noise and DC stability. IC Role / Device Role / Timing Role: Configured in pseudo-differential mode to reject common-mode interference while preserving signal integrity. Use Value: ±0.5 LSB INL and ±1.5% REFADJ tuning ensure clinical-grade amplitude accuracy across operating temperature. |
| Battery-Powered Instruments | System Supervision |
Use Scenario: Handheld multimeter measuring DC voltage, current, and resistance using auto-ranging analog front-end. IC Role / Device Role / Timing Role: Provides flexible input configuration (unipolar/bipolar, single-ended/differential) to support multiple measurement modes. Use Value: Single +2.7V to +5.25V supply simplifies power design; internal 2.5V reference removes dependency on external precision references. |
Use Scenario: Industrial PLC module monitoring rail voltages, temperature sensors, and fault indicators across multiple subsystems. IC Role / Device Role / Timing Role: Digitizes 4 independent analog supervision signals with programmable sampling intervals and automatic power-down between reads. Use Value: Software-selectable shutdown and fast wake-up (<1µs turn-on) reduce average system power without sacrificing responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1248ACPE+ | Same pinout and function, but specified for 0°C to +70°C (vs. BCPE+'s 0°C to +70°C - identical temp grade; ACPE+ has ±1 LSB INL vs. BCPE+'s ±0.5 LSB) | Suitable where ±1 LSB linearity meets system requirements and cost optimization is prioritized | Select MAX1248ACPE+ if ±1 LSB INL is acceptable and lower unit cost is critical |
| ADS7822U | 12-bit resolution, SPI-only interface, no internal reference, 2.7V–5.25V supply, 200ksps max - higher resolution but requires external reference and lacks REFADJ tuning | Better for precision measurement where 12-bit resolution outweighs need for internal reference simplicity | Choose ADS7822U when 12-bit accuracy is mandatory and external reference design is feasible |
Compared with MAX1248ACPE+, the MAX1248BCPE+ offers tighter ±0.5 LSB INL for improved measurement fidelity; compared with ADS7822U, it trades 2-bit resolution for integrated reference, REFADJ tuning, and lower system-level BOM complexity.
Availability
MAX1248BCPE+ is available at Aetrix Electronics and suitable for portable data logging, medical instruments, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX1248BCPE+ 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 portable applications.
The MAX1248 series targets low-power, multi-channel data acquisition in space- and energy-constrained systems, emphasizing integration of reference, track/hold, and serial interface in a single 16-pin package.
FAQ
What is the operating temperature range of the MAX1248BCPE+?
The MAX1248BCPE+ is rated for 0°C to +70°C ambient operating temperature. This commercial-grade specification matches the MAX1248ACPE+ and MAX1248ACEE variants, and is documented in the Ordering Information table of the MAX1248/MAX1249 datasheet Rev 2. Operation outside this range may result in degraded INL, reference drift, or timing violations.
Does the MAX1248BCPE+ require an external reference voltage?
No, the MAX1248BCPE+ includes an internal 2.500V reference buffer with ±0.3% initial accuracy at +25°C and ±30ppm/°C temperature coefficient. Unlike the MAX1249 variant, the MAX1248BCPE+ does not require an external reference - VREF is internally generated and adjustable via REFADJ.
How many analog input channels does the MAX1248BCPE+ support, and how are they configured?
The MAX1248BCPE+ supports four analog input channels (CH0–CH3), configurable in either 4-channel single-ended mode or 2-channel pseudo-differential mode (CH0/CH1 and CH2/CH3 pairs). Configuration is controlled entirely by the 8-bit serial control byte - no external jumpers or resistors are needed.
What serial interface protocols is the MAX1248BCPE+ compatible with?
The MAX1248BCPE+ supports SPI (CPOL = 0, CPHA = 0), QSPI, and MICROWIRE protocols via its 4-wire interface (DIN, DOUT, SCLK, CS). It requires no external logic for protocol translation and directly interfaces with microcontrollers including TMS320-family DSPs using the SSTRB strobe output.
What is the maximum conversion rate of the MAX1248BCPE+?
The MAX1248BCPE+ achieves a maximum conversion rate of 133ksps when using a 2.0MHz external serial clock and 15 clock cycles per conversion. In internal clock mode, conversion time is fixed at ≤7.5µs (133ksps equivalent), independent of SCLK frequency - enabling flexible host timing.
MAX1248BCPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1248BCPE+ FAQ
1.How can I place an order for MAX1248BCPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1248BCPE+ 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 MAX1248BCPE+ reliable?
The price and inventory of MAX1248BCPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1248BCPE+ is usually 5 days.
3.What payment methods are accepted for MAX1248BCPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1248BCPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1248BCPE+?
MAX1248BCPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1248BCPE+ 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 MAX1248BCPE+?
For technical support, including MAX1248BCPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1248BCPE+ requirements.
6.How does Aetrix verify that MAX1248BCPE+ is sourced from the original manufacturer or authorized distributors?
All MAX1248BCPE+ 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 MAX1248BCPE+ meets industry standards.
7.What is the process for return or replacement of MAX1248BCPE+?
All MAX1248BCPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1248BCPE+, 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 MAX1248BCPE+ part is unused and in its original packaging.
Return procedure for MAX1248BCPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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