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Analog Devices Inc./Maxim Integrated MAX152CWP+
- Part No.:
- MAX152CWP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX152CWP+.pdf
- Description:
- IC ADC 8BIT 1UA PWR-DWN 20-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,585
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Product details
Overview
The MAX152CWP+ from Maxim Integrated is an 8-bit, 400ksps analog-to-digital converter (ADC) using half-flash architecture for 1.8µs conversion time, operating from a single +3V supply with unipolar/bipolar input support and 1µA power-down current. It serves as a µP-compatible data acquisition front-end in portable telecom and battery-powered systems.
For engineers reviewing the MAX152CWP+ datasheet, MAX152CWP+ pinout, MAX152CWP+ application, or MAX152CWP+ equivalent, key selection criteria include its 900ns wake-up time, ratiometric reference capability, 300kHz full-power bandwidth, and compatibility with RD/WR-RD interface modes on microprocessor buses.
Technical Context
The MAX152CWP+ implements a two-stage half-flash ADC architecture: a 4-bit flash section generates the MSBs, then an internal 4-bit DAC produces a residue voltage that feeds a second 4-bit flash stage for LSBs. This achieves 8-bit resolution with only 15 comparators and eliminates need for external clock.
Its digital interface supports three operational modes-RD mode (MODE = 0), WR-RD mode (MODE = 1), and stand-alone mode (CS = RD = 0)-each with distinct timing constraints and control signal roles. Power-down is asserted via logic-low PWRDN, reducing VDD current to 1µA while enabling sub-µs wake-up and acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - defines quantization step size of 1/256 of reference span for digital representation of analog input. |
| Conversion Time | 1.8µs (typ) in RD mode - determines minimum sampling interval and maximum sustained throughput of 400ksps. |
| Supply Voltage | +3.0V to +3.6V - enables direct integration into 3V logic systems without level-shifting or regulation overhead. |
| Power-Down Current | 1µA (typ) - reduces average system power in burst-mode acquisition, extending battery life in portable radios or cellular handsets. |
| Input Bandwidth | 300kHz full-power - supports accurate digitization of signals up to ~100kHz fundamental without significant amplitude loss. |
| Reference Input | Ratiometric (VREF− to VREF+) - allows direct use of supply rail or external reference, eliminating gain error sensitivity to reference drift. |
| Interface Mode | µP-compatible memory-mapped or I/O-port - requires no external glue logic; data outputs are latched and three-state buffered for direct bus connection. |
Pinout & Package
MAX152CWP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, 7.2mm × 5.3mm body, and exposed thermal pad not connected internally. Pin numbering follows standard SSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Analog input node | Accepts unipolar (0V to VREF+) or bipolar (VREF− to VREF+) signals; input capacitance 22pF limits max source impedance to ~2.2kΩ for full accuracy. |
| D0–D7 (Pins 2–5, 14–17) | Three-state digital output bus | Deliver latched 8-bit result (D0 = LSB, D7 = MSB); high-impedance when CS high or during conversion to avoid bus contention. |
| WR/RDY (Pin 6) | Configurable control/status pin | In RD mode: open-collector ready signal (RDY); in WR-RD mode: write strobe input (WR) initiating conversion sequence. |
| MODE (Pin 7) | Interface mode selector | Low = RD mode (single read cycle); high = WR-RD mode (separate write/read phases); internal 15µA pull-down ensures default RD operation. |
| RD (Pin 8) | Read strobe input | Active-low signal enabling data output drivers in RD mode; also resets INT output on rising edge. |
| INT (Pin 9) | Interrupt output | Open-drain active-low pulse signaling end of conversion; used to trigger µP interrupt or synchronize data read. |
| GND (Pin 10) | Analog/digital ground reference | Common return for VSS, analog inputs, and digital logic; requires low-impedance connection to minimize noise coupling. |
| VREF− (Pin 11) | Reference lower bound | Sets zero-code point; must be ≥ VSS and < VREF+; internal 1kΩ path draws current even in power-down unless switched externally. |
| VREF+ (Pin 12) | Reference upper bound | Sets full-scale code point; range VREF− < VREF+ ≤ VDD; bypassed with 0.1µF ceramic capacitor for stability. |
| CS (Pin 13) | Chip-select enable | Active-low input enabling WR/RD/INT functions; must be low for any digital interaction; resets INT on rising edge. |
| PWRDN (Pin 18) | Power-down control | Logic-low assertion reduces IDD to 1µA; wake-up + acquisition completes in <900ns; connect to VDD if unused. |
| VSS (Pin 19) | Negative supply rail | 0V for unipolar operation; −3.0V to −3.6V for bipolar mode; supplies internal analog circuitry and reference ladder. |
| VDD (Pin 20) | Positive supply rail | +3.0V to +3.6V primary power; powers digital core, analog front-end, and output drivers; bypassed with 4.7µF + 0.1µF. |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Enables 8-bit resolution with 15 comparators and 1.8µs conversion, reducing die area and power vs. full-flash while avoiding pipeline latency. |
| Sub-µs wake-up from power-down | 900ns power-up + acquisition time allows rapid response to burst-mode signals without sacrificing ultra-low 1µA standby current. |
| Ratiometric reference support | VREF− and VREF+ inputs let system accuracy track supply or reference variations, eliminating separate precision voltage reference in cost-sensitive designs. |
| No external clock required | Internal timing generator synchronizes conversion and interface cycles, simplifying PCB layout and reducing BOM count in µP-centric systems. |
| Three configurable interface modes | RD mode (memory-mapped), WR-RD mode (I/O-port), and stand-alone mode (CS/RD grounded) provide flexibility across µP families and real-time constraints. |
Applications
| Cellular Telephones | Portable Radios |
|---|---|
Use Scenario: Monitoring RF power amplifier bias current and temperature in GSM/CDMA handset transceivers during transmission bursts. IC Role / Device Role / Timing Role: ADC front-end capturing analog sensor outputs at 400ksps with 1.8µs latency, synchronized to TDMA slot timing via INT-driven µP interrupt. Use Value: Enables closed-loop PA control with <1µA quiescent current between slots, directly extending talk-time without adding DC-DC converters or sequencers. | Use Scenario: Digitizing audio IF signals and RSSI levels in handheld two-way radios operating in narrowband FM bands. IC Role / Device Role / Timing Role: High-speed acquisition engine interfacing to DSP via 8-bit parallel bus, using WR-RD mode for deterministic 1.8µs conversion + 400ns data access timing. Use Value: Delivers 48.2dB SNR at 30.27kHz input while consuming only 1.5mA active current, meeting EN 300 113 spectral mask requirements under battery power. |
| Battery-Powered Systems | Burst-Mode Data Acquisition |
Use Scenario: Measuring battery voltage, charge current, and thermistor readings in medical glucose meters and portable ECG monitors. IC Role / Device Role / Timing Role: Low-power sensor hub ADC performing periodic 10-sample bursts every 500ms, entering 1µA power-down between measurements. Use Value: Reduces average supply current to <10µA over full duty cycle, enabling >2-year operation on a single CR2032 coin cell without recharge circuitry. | Use Scenario: Capturing transient waveforms from vibration sensors in predictive maintenance modules deployed on industrial motors. IC Role / Device Role / Timing Role: Triggered acquisition subsystem starting conversion within 900ns of external event (e.g., accelerometer interrupt), delivering 8-bit samples at 400ksps for FFT analysis. Use Value: Eliminates need for external sample-and-hold or clock generators; full 300kHz input bandwidth preserves harmonic content critical for bearing fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply; SPI interface; 1MSPS; no power-down mode; 2.5µs conversion. | Requires serial interface controller; lacks µP-compatible parallel bus; higher speed but no sub-µA sleep state. | Select when board space is constrained and SPI is already used; avoid when µP lacks SPI or low-power burst operation is mandatory. |
| MAX1112CPE+ | 8-bit, 250ksps; +2.7V–+3.6V; 1.5µs conversion; 1µA power-down; 16-pin PDIP/SO. | Lower throughput; identical power-down and supply specs; smaller pin count but no MODE pin or WR/RDY dual function. | Choose for simpler interface needs where 250ksps suffices and 20-pin routing is undesirable; verify timing compatibility with existing RD/WR protocols. |
Compared with ADS7822U and MAX1112CPE+, the MAX152CWP+ uniquely combines µP-parallel interface, 400ksps throughput, and 1µA power-down in a single 20-pin SSOP package-making it optimal for legacy 8-bit µP systems requiring minimal firmware changes and maximal battery efficiency.
Availability
MAX152CWP+ is available at Aetrix Electronics and suitable for cellular telephones, portable radios, and battery-powered systems requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature performance (0°C to +70°C).
Supply support for MAX152CWP+ 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 industrial, automotive, and communications markets.
The MAX152CWP+ belongs to Maxim's high-speed, low-power ADC product line, engineered specifically for µP-based portable instrumentation and telecom infrastructure where fast acquisition, minimal standby current, and simple parallel interfacing are critical.
FAQ
What is the absolute maximum supply voltage rating for the MAX152CWP+?
The MAX152CWP+ has an absolute maximum VDD-to-GND rating of −0.3V to +7V and VSS-to-GND of +0.3V to −7V. Exceeding these limits-even momentarily-may cause permanent damage. Operation is specified only from +3.0V to +3.6V for VDD and −3.6V to 0V for VSS. Always observe derating curves for continuous power dissipation in the 20-pin SSOP package.
How does the MAX152CWP+ achieve 1.8µs conversion time without an external clock?
The MAX152CWP+ integrates an internal timing generator that controls the half-flash conversion sequence-including comparator settling, DAC residue generation, and output latching-without requiring an external clock source. This self-timed design simplifies system timing, eliminates clock distribution noise, and ensures consistent 1.8µs conversion across supply voltages from +3.0V to +3.6V as verified in the Typical Operating Characteristics graphs.
Can the MAX152CWP+ operate with a 2.5V reference while powered from +3.3V?
Yes-the MAX152CWP+ supports ratiometric operation: VREF+ can be set to 2.5V (e.g., via MAX872) while VDD remains at +3.3V, provided VREF+ ≤ VDD and VREF− ≥ VSS. The reference inputs accept VREF− from VSS up to VREF+ − 0.3V, and VREF+ from VREF− + 0.3V up to VDD + 0.3V. Bypass both VREF+ and VREF− with 0.1µF ceramic capacitors.
What happens to the MAX152CWP+ data outputs during power-down?
When PWRDN is driven low, the MAX152CWP+ places all D0–D7 outputs in high-impedance (three-state) mode regardless of CS or RD state. Output drivers are disabled, and floating-state current is limited to ±3µA. To prevent bus contention, ensure external pull-ups/downs are sized to meet µP input thresholds when MAX152CWP+ outputs are inactive.
Is the MAX152CWP+ pin-compatible with other variants like MAX152CPP+ or MAX152EWP+?
Yes-MAX152CWP+, MAX152CPP+, and MAX152EWP+ share identical 20-pin pinouts across SO, SSOP, and PDIP packages. Differences lie only in temperature grade (C = 0°C to +70°C, E = −40°C to +85°C) and package type (W = SSOP, P = PDIP). Electrical specifications are identical within their respective temperature ranges, allowing drop-in replacement where environmental requirements align.
MAX152CWP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 400k
- 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:
- Flash
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±3V ~ 3.6V
- Voltage - Supply, Digital:
- ±3V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX152CWP+ FAQ
1.How can I place an order for MAX152CWP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX152CWP+ 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 MAX152CWP+ reliable?
The price and inventory of MAX152CWP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX152CWP+ is usually 5 days.
3.What payment methods are accepted for MAX152CWP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX152CWP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX152CWP+?
MAX152CWP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX152CWP+ 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 MAX152CWP+?
For technical support, including MAX152CWP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX152CWP+ requirements.
6.How does Aetrix verify that MAX152CWP+ is sourced from the original manufacturer or authorized distributors?
All MAX152CWP+ 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 MAX152CWP+ meets industry standards.
7.What is the process for return or replacement of MAX152CWP+?
All MAX152CWP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX152CWP+, 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 MAX152CWP+ part is unused and in its original packaging.
Return procedure for MAX152CWP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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