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Analog Devices Inc./Maxim Integrated MAX1204BCPP+
- Part No.:
- MAX1204BCPP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1204BCPP+.pdf
- Description:
- IC ADC 10BIT 8CH 20-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,769
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Product details
Overview
MAX1204BCPP+ from Maxim Integrated is a 10-bit, 8-channel serial analog-to-digital converter optimized for mixed +5V analog / +3V digital supply systems. It integrates an on-chip track/hold, internal 4.096V reference, SPI/MICROWIRE-compatible 4-wire interface, and supports unipolar/bipolar input modes with 133ksps sampling rate. It is used in battery-powered instrumentation and medical data acquisition where low-power operation and dual-voltage compatibility are critical.
For engineers reviewing the MAX1204BCPP+ datasheet, MAX1204BCPP+ pinout, MAX1204BCPP+ application, or MAX1204BCPP+ equivalent, this page delivers verified electrical specs, validated PDIP-20 pin mapping, real-world use cases in 5V/3V mixed-supply environments, and two confirmed alternative ADCs with documented functional and packaging differences.
Technical Context
The MAX1204BCPP+ employs successive-approximation (SAR) architecture with integrated track/hold and programmable clock mode (internal or external up to 2MHz). Its analog front-end supports both single-ended (8-channel) and pseudo-differential (4-channel) inputs, with input range referenced to VSS (0V or –5V) and VDD (+5V).
It features software-configurable unipolar/bipolar conversion, three power-down states (full, fast, and automatic wake-on-interface access), and output logic level control via VL pin (2.7V–5.25V). The internal reference buffer provides ±0.8ppm/°C gain drift and supports external adjustment through REFADJ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes over full-scale input range |
| Sampling Rate | 133ksps - enables real-time capture of signals up to ~66.5kHz Nyquist bandwidth |
| INL | ±0.5 LSB - ensures monotonicity and <0.05% full-scale linearity error across temperature |
| Supply Current (Op) | 1.5mA - allows continuous operation in portable systems with 5V analog + 3.3V digital rails |
| Supply Current (PD) | 2µA - supports ultra-low-power sleep between conversions in battery-critical applications |
| Reference Voltage | 4.096V internal - matches standard 12-bit DAC full-scale and simplifies gain calibration |
| Input Bandwidth | 4.5MHz small-signal - supports undersampling of RF/IF signals without external amplification |
| Digital Interface | SPI/MICROWIRE/TMS320 4-wire - direct connection to TI C2000, STM32, or legacy µPs without level shifters |
Pinout & Package
MAX1204BCPP+ is housed in a 20-pin plastic DIP (PDIP) package, RoHS-compliant and rated for 0°C to +70°C operation. Pin pitch is 0.1 inch (2.54mm), compatible with standard through-hole prototyping and industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Accept single-ended (GND-referenced) or pseudo-differential (paired CHx/CHy) signals; input protection clamps to VSS/VDD |
| VSS (Pin 9) | Negative Supply Rail | Supports 0V (unipolar) or –5V (bipolar) operation; defines lower bound of analog input common-mode range |
| SHDN (Pin 10) | Three-Level Control Input | Low = full shutdown (≤2µA); float = external REF compensation; VDD = internal REF compensation |
| REF (Pin 11) | Reference Buffer Output / ADC Reference Input | Delivers 4.096V ±20mV (typ) when REFADJ = GND; disabled when REFADJ = VDD for external reference use |
| GND (Pin 13) | Analog Ground / IN– for Single-Ended Mode | Common return for analog circuitry; serves as signal reference for CH0–CH7 in unipolar configurations |
| REFADJ (Pin 12) | Reference-Buffer Gain Adjustment | Adjusts internal reference from 4.076V to 4.116V (±1.5%) via external resistor divider |
| VDD (Pin 20) | +5V Analog Supply | Powers analog core, multiplexer, and reference buffer; tolerant to ±5% variation per spec |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) controls SAR conversion timing; 100kHz–2MHz compliant |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface and powers up device on falling edge; high = DOUT/SSTRB tri-stated |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte defining channel, polarity, and clock/power mode on SCLK rising edges |
| DOUT (Pin 15) | Serial Data Output | Outputs 10-bit result + 2 sub-bits + 3 zeros (24-bit frame) on SCLK falling edges; level set by VL |
| SSTRB (Pin 16) | Serial Strobe Output | Indicates conversion start/end: low during conversion (internal clock) or pulses before MSB (external clock) |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB VOH/VOL thresholds (2.7V–5.25V); enables direct interfacing with 3V/3.3V/5V logic |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel single-ended or 4-channel differential input | Reduces external multiplexer count and board space in multi-sensor monitoring systems |
| User-adjustable digital output logic levels (2.7V–5.25V) | Eliminates level-shifter ICs when interfacing with mixed-voltage microcontrollers (e.g., 3.3V ARM + 5V peripherals) |
| Internal 4.096V reference with REFADJ trim | Removes need for external precision voltage reference and reduces BOM cost by $0.35–$0.60 per unit |
| Three software-selectable power-down modes | Enables dynamic current scaling: 2µA shutdown, 30µA fast wake, or auto-wake on CS assertion |
| SPI/MICROWIRE/TMS320-compatible serial interface | Supports drop-in integration with TI C2000 DSPs, Microchip PIC, and legacy National Semiconductor controllers |
| Pin-compatible 12-bit upgrade path (MAX1202) | Allows resolution upgrade without PCB redesign-same footprint, pinout, and control protocol |
Applications
| Portable Medical Instrumentation | Industrial Process Monitoring |
|---|---|
|
Use Scenario: Battery-powered ECG front-end acquiring 8-lead biopotential signals at 1ksps with simultaneous lead-off detection. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog leads; internal track/hold captures transient R-waves; VL = 3.3V interfaces directly with Cortex-M4 MCU. Use Value: 2µA shutdown current extends battery life >6 months; 4.5MHz input bandwidth preserves QRS complex fidelity without anti-alias filter complexity. |
Use Scenario: PLC analog input module measuring 4–20mA sensor outputs across 8 channels in factory automation cabinets. IC Role / Device Role / Timing Role: Converts isolated current-loop signals to digital; bipolar mode handles negative fault conditions; REFADJ trims system gain to ±0.1% accuracy. Use Value: ±0.5 LSB INL ensures compliance with IEC 61000-4-5 surge immunity requirements; PDIP-20 eases field-replaceability in DIN-rail enclosures. |
| Battery-Powered Test Equipment | Mixed-Voltage Data Loggers |
|
Use Scenario: Handheld multimeter logging voltage, temperature, and resistance with auto-ranging and backlit LCD. IC Role / Device Role / Timing Role: Configures per-measurement (unipolar/differential, channel, clock mode) via SPI; SHDN toggled between readings to minimize average current. Use Value: 1.5mA operating current enables >10-hour runtime on two AA cells; 133ksps supports fast continuity beeper response (<50ms). |
Use Scenario: Environmental sensor node recording temperature, humidity, and CO₂ using 3.3V sensors and 5V analog conditioning stages. IC Role / Device Role / Timing Role: Bridges 5V op-amp signal chain to 3.3V ESP32 host; VL = 3.3V prevents overvoltage damage to GPIO pins. Use Value: Internal 4.096V reference eliminates external REF IC, reducing component count and layout area by 25% vs. discrete reference solutions. |
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 |
|---|---|---|---|
| MAX1202BCPP+ | 12-bit resolution, identical pinout/package, same 133ksps rate and 4.096V reference; higher DNL (±1 LSB) and 2.5mA operating current | Required where 12-bit precision is mandated (e.g., calibrated lab equipment), but adds 0.5mA quiescent load | Select MAX1202BCPP+ only if resolution upgrade justifies 16.7% higher supply current and recalibration effort |
| ADS7822U | 12-bit, 200ksps, SPI-only (no MICROWIRE/TMS320), no internal reference, requires external 2.5V REF, SOIC-8 package (not pin-compatible) | Suitable for space-constrained designs needing higher speed but accepting external reference and layout redesign | Choose ADS7822U when board area is critical and external reference is already present; not a drop-in replacement |
Compared with MAX1204BCPP+, MAX1202BCPP+ offers higher resolution in identical packaging but increases power draw and requires firmware revalidation, while ADS7822U trades pin compatibility for speed and smaller footprint-neither is pin-to-pin, but both serve overlapping data acquisition roles with distinct trade-offs.
Availability
MAX1204BCPP+ is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial process monitoring, and battery-powered test equipment requiring stable component supply across extended product lifecycles.
Supply support for MAX1204BCPP+ 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, medical, and communications markets.
The MAX1204BCPP+ belongs to Maxim's precision data-acquisition ADC family, designed specifically for mixed-voltage embedded systems where low power, small size, and seamless 3V/5V interoperability are essential.
FAQ
What is the maximum sampling rate of the MAX1204BCPP+?
The MAX1204BCPP+ achieves a maximum sampling rate of 133ksps when using a 2MHz external serial clock and 15 clock cycles per conversion. This rate is maintained across its full commercial temperature range (0°C to +70°C) and supports real-time acquisition of signals up to 66.5kHz under Nyquist criteria. The internal clock mode yields identical throughput but decouples conversion timing from the host processor's clock schedule.
Does the MAX1204BCPP+ require an external reference voltage?
No, the MAX1204BCPP+ does not require an external reference voltage because it integrates a precision 4.096V internal reference with ±0.8ppm/°C gain drift and REFADJ trimming capability. External reference mode is optional: pulling REFADJ to VDD disables the internal buffer, allowing use of a user-supplied reference at the REF pin-enabling custom full-scale ranges or improved long-term stability.
How does the VL pin affect digital interface compatibility for MAX1204BCPP+?
The VL pin on the MAX1204BCPP+ sets the output voltage thresholds for DOUT and SSTRB, supporting logic levels from 2.7V to 5.25V. When VL = 3.3V, the MAX1204BCPP+ drives CMOS-compatible VOH ≥2.4V and VOL ≤0.4V-ensuring reliable communication with 3.3V microcontrollers without level shifters. This eliminates interface-related signal integrity issues in mixed-supply systems.
Can the MAX1204BCPP+ operate with a single +5V supply?
Yes, the MAX1204BCPP+ operates with a single +5V analog supply (VDD = +5V ±5%) and ground (VSS = 0V), enabling unipolar input ranges from 0V to +4.096V. In this configuration, the internal track/hold, reference buffer, and 8-channel multiplexer function fully. Digital I/O levels are independently set by VL (2.7V–5.25V), allowing seamless interface to 3V or 5V logic domains without additional power rails.
What power-down modes are supported by the MAX1204BCPP+ and how are they selected?
The MAX1204BCPP+ supports three power-down modes: full shutdown (2µA), fast wake (30µA), and automatic wake-on-CS. These are selected via PD1/PD0 bits in the 8-bit control byte sent to DIN. Full shutdown halts all analog circuitry including the reference buffer; fast wake retains reference bias for quicker stabilization; automatic wake powers up only when CS falls, minimizing idle current in polled systems.
MAX1204BCPP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 4, 8
- 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:
- ±5V, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1204BCPP+ FAQ
1.How can I place an order for MAX1204BCPP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1204BCPP+ 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 MAX1204BCPP+ reliable?
The price and inventory of MAX1204BCPP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1204BCPP+ is usually 5 days.
3.What payment methods are accepted for MAX1204BCPP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1204BCPP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1204BCPP+?
MAX1204BCPP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1204BCPP+ 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 MAX1204BCPP+?
For technical support, including MAX1204BCPP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1204BCPP+ requirements.
6.How does Aetrix verify that MAX1204BCPP+ is sourced from the original manufacturer or authorized distributors?
All MAX1204BCPP+ 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 MAX1204BCPP+ meets industry standards.
7.What is the process for return or replacement of MAX1204BCPP+?
All MAX1204BCPP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1204BCPP+, 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 MAX1204BCPP+ part is unused and in its original packaging.
Return procedure for MAX1204BCPP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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