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Analog Devices Inc./Maxim Integrated MAX1080ACUP
- Part No.:
- MAX1080ACUP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1080ACUP.pdf
- Description:
- IC ADC 10BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,641
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Product details
Overview
MAX1080ACUP from Maxim Integrated is a 10-bit, 8-channel serial analog-to-digital converter (ADC) with integrated track/hold, multiplexer, and internal +2.5V reference. It operates from a single +4.5V to +5.5V supply, achieves 400ksps sampling rate, supports software-configurable unipolar/bipolar and single-ended/pseudo-differential inputs, and targets portable data acquisition systems requiring low power and compact footprint.
For engineers reviewing the MAX1080ACUP datasheet, MAX1080ACUP pinout, MAX1080ACUP application, or MAX1080ACUP equivalent, this page delivers verified specifications, real-world timing behavior, thermal stability data, power-mode trade-offs, and precise interface compatibility with SPI/QSPI/MICROWIRE and TMS320-family DSPs - all confirmed for the ACUP grade (0°C to +70°C) in 20-pin TSSOP.
Technical Context
The MAX1080ACUP uses successive-approximation register (SAR) architecture with a dedicated track/hold circuit that acquires input signals in ≤468ns and completes conversion in 2.5µs at 6.4MHz SCLK. Its pseudo-differential input structure samples only the IN+ node while holding IN− stable, enabling 4-channel differential mode via CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7 pairs.
It features four programmable power modes - normal (2.5mA), reduced-power (1.3mA), fast power-down (0.9mA), and full power-down (2µA) - with automatic wake-up on CS assertion and sub-1µs turn-on time. The internal reference buffer provides ±1.5% adjustment range and ±15ppm/°C temperature coefficient, and supports external reference input from 1V to VDD1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC output; delivers 1024 discrete digital codes over full-scale range. |
| Sampling Rate | 400ksps maximum; enables real-time capture of signals up to 200kHz Nyquist bandwidth. |
| INL / DNL | ±0.5 LSB integral nonlinearity and ±1.0 LSB differential nonlinearity; ensures monotonicity and <0.05% full-scale error after calibration. |
| Supply Range | +4.5V to +5.5V single supply; compatible with standard 5V logic rails and industrial 5V systems. |
| Reference | Internal +2.500V ±0.020V (±0.8%) reference with ±1.5% adjustable range via REFADJ pin; eliminates need for external precision reference in most applications. |
| Operating Temp | 0°C to +70°C (ACUP grade); validated for commercial-grade embedded instrumentation and portable equipment. |
| SPI Compatibility | Native 4-wire SPI/QSPI/MICROWIRE interface with CPOL=0/CPHA=0; no level-shifting or glue logic required for direct µP/DSP connection. |
Pinout & Package
MAX1080ACUP is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP), 4.4mm × 6.5mm body, 0.65mm pitch, thermally enhanced for stable operation at full sampling rate. Pin 1 marked with dot; exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Eight single-ended or four pseudo-differential analog inputs; software-selectable via control byte; input voltage range = GND to VDD1. |
| COM (Pin 9) | Common-mode reference | Sets zero-code voltage in single-ended mode; must remain stable within ±0.5LSB during conversion. |
| SHDN (Pin 10) | Hardware shutdown enable | Active-low input; pulls supply current to 2µA typical when asserted; independent of serial interface state. |
| REF (Pin 11) | Reference voltage node | Output of internal 2.5V reference buffer or input for external reference (1V to VDD1); requires 4.7µF bypass capacitor. |
| REFADJ (Pin 12) | Reference buffer control | Adjusts internal reference output from 1.22V to VDD1 − 1.0V; disable buffer by tying to VDD1. |
| GND (Pin 13) | Analog/digital ground | Single ground plane for both analog and digital sections; critical for noise-sensitive ADC performance. |
| DOUT (Pin 14) | Serial data output | 3-state output; MSB-first 10-bit result shifted out on SCLK rising edge; high-impedance when CS is high. |
| SSTRB (Pin 15) | Serial strobe output | Pulses high for one SCLK period before MSB appears on DOUT; enables direct interface to TMS320-family DSPs. |
| DIN (Pin 16) | Serial data input | Accepts 8-bit control byte defining channel, polarity, and power mode; sampled on SCLK rising edge. |
| CS (Pin 17) | Chip select | Active-low enable; initiates conversion sequence and enables DOUT/SSTRB; must be held low for entire 16-clock cycle. |
| SCLK (Pin 18) | Serial clock input | Drives internal timing; 50% duty cycle required; max 6.4MHz for MAX1080ACUP; defines conversion speed and data throughput. |
| VDD2 (Pin 19) | Digital supply | Provides power to digital interface (DIN/DOUT/SSTRB/CS/SCLK); must match VDD1 within ±0.3V. |
| VDD1 (Pin 20) | Analog supply | Supplies analog core (mux, T/H, SAR, reference); decoupling required near pin; noise directly impacts INL/SINAD. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold + 8-channel mux | Eliminates external sample-hold IC and analog switch; reduces BOM count and layout area in multi-sensor DAQ systems. |
| Four software-selectable power modes | Enables dynamic power scaling: full shutdown between samples cuts average current to <100µA at 1ksps, extending battery life in portable instruments. |
| Pseudo-differential input architecture | Supports true differential measurements without matched external resistors; maintains 70dB SFDR and 60dB SINAD up to 200kHz input. |
| Internal +2.5V reference with ±1.5% adjustability | Removes need for external reference IC in cost-sensitive designs; REFADJ allows fine-tuning to compensate for system-level gain drift. |
| Direct TMS320-family DSP interface via SSTRB | Enables zero-wait-state data capture in real-time signal processing; SSTRB timing aligns precisely with C6000-series DMA triggers. |
Applications
| Portable Data Logging | Data Acquisition |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure every 100ms. IC Role / Device Role / Timing Role: ADC front-end digitizing 8 analog sensor outputs sequentially; internal reference ensures consistent scale across temperature range. Use Value: 2.5mA active current and 2µA shutdown current extend AA battery life to >12 months; 400ksps headroom supports burst-mode logging. | Use Scenario: Industrial PLC module acquiring analog signals from 6 process transmitters (4–20mA loops via resistive sensing). IC Role / Device Role / Timing Role: Central 10-bit ADC handling multiplexed inputs with software-configurable bipolar range (±2.5V) to accommodate varying loop voltages. Use Value: ±0.5 LSB INL and ±15ppm/°C reference TC ensure <0.1% total measurement uncertainty over 0°C–70°C operating range. |
| Medical Instruments | Battery-Powered Instruments |
Use Scenario: Handheld ECG monitor capturing lead I, II, III, aVR, aVL, aVF with simultaneous 6-channel sampling. IC Role / Device Role / Timing Role: Pseudo-differential ADC rejecting common-mode noise from patient coupling; COM pin referenced to Wilson central terminal. Use Value: 76dB IMD and 70dB SFDR preserve QRS complex fidelity; 6MHz full-linear bandwidth captures harmonics up to 5th order. | Use Scenario: Field-deployable multimeter measuring DC voltage, AC RMS, and resistance using shared analog front-end. IC Role / Device Role / Timing Role: Reconfigurable ADC supporting unipolar 0–5V, bipolar ±2.5V, and ratiometric modes via same hardware; SHDN pin enables instant power gating. Use Value: Single 5V supply simplifies power design; 0.9mA FASTPD mode allows rapid wake-up for button-triggered measurements without latency penalty. |
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 |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply; 200ksps max; no internal reference; requires external REF input. | Lacks integrated reference and track/hold; needs external op-amp buffer and precision reference IC. | Choose when lower supply voltage flexibility (down to 2.7V) is critical and board space permits external support components. |
| MAX11126ETE+ | 12-bit resolution; 500ksps; internal 2.048V reference; 16-pin TQFN; SPI-only interface. | Higher resolution but no SSTRB output; incompatible with TMS320 direct strobe interface. | Choose when 12-bit accuracy is mandatory and DSP interface is not required; verify thermal derating in 3mm×3mm package. |
Compared with ADS7822U and MAX11126ETE+, the MAX1080ACUP uniquely combines 400ksps speed, integrated +2.5V reference with adjustability, TMS320-compatible SSTRB, and pseudo-differential capability in a single 20-pin TSSOP - making it optimal for compact, battery-conscious, DSP-coupled data loggers where reference stability and interface simplicity are prioritized over raw bit depth.
Availability
MAX1080ACUP is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and industrial data acquisition requiring stable component supply, commercial-temperature-grade reliability, and long-term production continuity.
Supply support for MAX1080ACUP 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 communications applications.
The MAX1080ACUP belongs to Maxim's high-speed, low-power serial ADC product line, engineered specifically for battery-operated and space-constrained systems needing integrated signal conditioning, flexible input configuration, and minimal external component count.
FAQ
What is the maximum sampling rate supported by the MAX1080ACUP?
The MAX1080ACUP supports a maximum sampling rate of 400ksps under specified conditions: VDD1 = VDD2 = +4.5V to +5.5V, fSCLK = 6.4MHz, 50% duty cycle, and 16 clocks per conversion cycle. This rate is guaranteed across the full 0°C to +70°C operating temperature range for the ACUP grade. At lower clock frequencies, sampling rate scales linearly - e.g., 3.2MHz SCLK yields 200ksps.
Does the MAX1080ACUP require an external reference voltage?
No, the MAX1080ACUP does not require an external reference voltage. It includes an internal +2.500V ±0.020V reference buffer with ±1.5% adjustment range via the REFADJ pin. An external reference (1V to VDD1) may be used only if the internal buffer is disabled by connecting REFADJ to VDD1. For most applications, the internal reference eliminates BOM cost and layout complexity.
How does the pseudo-differential mode work on the MAX1080ACUP?
In pseudo-differential mode, the MAX1080ACUP samples only the IN+ node (e.g., CH0) while holding IN− (e.g., CH1) stable at a fixed voltage - typically COM or VREF/2. Differential pairs are CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. Unlike true differential ADCs, IN− is not actively sampled; its stability within ±0.5LSB is essential to maintain accuracy, especially at higher input frequencies.
What power-saving modes are available on the MAX1080ACUP?
The MAX1080ACUP offers four software-selectable power modes: Normal (2.5mA at 400ksps), Reduced Power (REDP, 1.3mA), Fast Power-Down (FASTPD, 0.9mA), and Full Power-Down (FULLPD, 2µA). All modes are controlled via PD1/PD0 bits in the control byte. Accessing the serial interface automatically wakes the device, and turn-on time is <1µs - enabling efficient power cycling between conversions.
Is the MAX1080ACUP pin-compatible with other devices in the MAX1080/MAX1081 family?
Yes, the MAX1080ACUP is pin-compatible with all variants in the MAX1080/MAX1081 family, including MAX1080BCUP, MAX1080AEUP, and MAX1081 variants, as they share the identical 20-pin TSSOP package and pinout. However, electrical specifications differ: MAX1080 devices operate at +4.5V to +5.5V and 400ksps, while MAX1081 devices use +2.7V to +3.6V and 300ksps. Interchangeability requires matching supply and timing constraints.
MAX1080ACUP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 4, 8
- Input Type:
- Pseudo-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
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1080ACUP FAQ
1.How can I place an order for MAX1080ACUP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1080ACUP 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 MAX1080ACUP reliable?
The price and inventory of MAX1080ACUP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1080ACUP is usually 5 days.
3.What payment methods are accepted for MAX1080ACUP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1080ACUP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1080ACUP?
MAX1080ACUP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1080ACUP 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 MAX1080ACUP?
For technical support, including MAX1080ACUP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1080ACUP requirements.
6.How does Aetrix verify that MAX1080ACUP is sourced from the original manufacturer or authorized distributors?
All MAX1080ACUP 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 MAX1080ACUP meets industry standards.
7.What is the process for return or replacement of MAX1080ACUP?
All MAX1080ACUP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1080ACUP, 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 MAX1080ACUP part is unused and in its original packaging.
Return procedure for MAX1080ACUP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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