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Analog Devices Inc. AD7888ARUZ-REEL
- Part No.:
- AD7888ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7888ARUZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,520
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Product details
Overview
AD7888ARUZ-REEL from Analog Devices is a micropower, 12-bit, 8-channel successive-approximation ADC operating from a single 2.7 V to 5.25 V supply, delivering 125 kSPS throughput with 500 ns track/hold acquisition time and integrated 2.5 V reference. It supports SPI/QSPI/MICROWIRE/DSP-compatible serial interface and targets battery-powered instrumentation and portable medical devices.
For engineers reviewing the AD7888ARUZ-REEL datasheet, AD7888ARUZ-REEL pinout, AD7888ARUZ-REEL application, or AD7888ARUZ-REEL equivalent, key selection criteria include guaranteed 12-bit no-missed-codes performance (B-grade), channel-to-channel isolation of –80 dB at 25 kHz, flexible power management (shutdown current ≤1 µA at 2.7–3.6 V), and TSSOP-16 package compatibility with space-constrained embedded systems.
Technical Context
The AD7888ARUZ-REEL implements a charge redistribution SAR architecture with internal track-and-hold, enabling full-power signal conversion up to 2.5 MHz. Its 8-channel single-ended multiplexer is controlled via an 8-bit write-only control register with ADD0–ADD2 address bits and REF/PM1/PM0 configuration bits.
It features dual reference operation: internal 2.5 V reference (±50 ppm/°C tempco, 2.45–2.55 V output) or external reference (1.2 V to VDD), with high-impedance REF IN/REF OUT pin (5 kΩ when enabled, >1 GΩ when disabled). Serial interface timing requires 16 SCLK cycles per conversion (14.5 for conversion + 1.5 for acquisition) with CS framing and MSB-first 16-bit data stream (4 leading zeros + 12-bit result).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes with straight binary output |
| Throughput Rate | 125 kSPS - enables real-time sampling of signals up to 2.5 MHz full-power bandwidth |
| Supply Voltage | 2.7 V to 5.25 V - supports both 3 V and 5 V system rails without level-shifting |
| Reference Options | Internal 2.5 V ±50 ppm/°C or external 1.2 V to VDD - allows precision calibration or system-level reference sharing |
| Shutdown Current | 1 µA max at 2.7–3.6 V - extends battery life in intermittent-sampling applications |
| SNR / THD | 71 dB / –80 dB typ at 10 kHz - meets requirements for medium-fidelity sensor digitization |
| Channel Isolation | –80 dB at 25 kHz - prevents crosstalk between adjacent analog inputs in multi-sensor systems |
Pinout & Package
AD7888ARUZ-REEL is housed in a 16-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 5.0 mm × 1.2 mm body size, with 0.65 mm lead pitch and exposed pad (not electrically connected). Pin 1 is marked by a dot or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-low frame sync for serial transfers; initiates conversion on falling edge |
| 2 (REF IN/REF OUT) | Reference I/O | Provides access to internal 2.5 V reference or accepts external 1.2–VDD reference |
| 3 (VDD) | Power Supply | Single 2.7–5.25 V rail powering analog and digital circuitry |
| 4, 13 (AGND) | Analog Ground | Dual low-impedance return path for analog inputs, reference, and internal circuitry |
| 5–12 (AIN1–AIN8) | Analog Inputs | Eight single-ended channels, each 0–VREF range; unused pins must tie to AGND |
| 14 (DIN) | Data Input | Loads 8-bit control register on SCLK rising edges (MSB first) |
| 15 (DOUT) | Data Output | Serial 16-bit stream (4 zeros + 12-bit result) clocked on SCLK falling edge |
| 16 (SCLK) | Serial Clock | Master clock for control register writes, conversion timing, and data transfer (2 MHz max) |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Power Management | Four modes (Normal/Autoshutdown/Autostandby/Full Shutdown) programmable via PM1/PM0 bits |
| Guaranteed No-Missed-Codes | 12-bit monotonicity ensured across full temperature range (–40°C to +105°C, B-grade) |
| Low-Power Track-and-Hold | 500 ns acquisition time with 38 pF input capacitance in track mode, 4 pF in hold mode |
| Versatile Serial Interface | SPI/QSPI/MICROWIRE/DSP-compatible protocol with CS framing and 16-cycle transaction |
| On-Chip Reference Buffer | 2.5 V ±50 ppm/°C reference with 5 kΩ input impedance when enabled; >1 GΩ when disabled |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG or blood oxygen saturation monitoring in handheld clinical devices with 3 V coin-cell or Li-ion power. IC Role / Device Role / Timing Role: 12-bit digitization of eight biopotential channels with <500 ns acquisition and automatic shutdown between samples. Use Value: 1 µA shutdown current extends operational life beyond 12 months on a single CR2032 cell while maintaining 12-bit fidelity. | Use Scenario: Environmental parameter logging (temperature, humidity, pressure) in remote field deployments with solar-charged batteries. IC Role / Device Role / Timing Role: Low-noise, multi-channel analog front-end with configurable reference and SPI interface for microcontroller host. Use Value: –80 dB channel isolation prevents cross-talk between sensors sharing common ground, ensuring independent calibration validity. |
| Industrial Process Monitoring | High-Speed Modem Analog Front-End |
Use Scenario: Real-time voltage/current monitoring across eight PLC I/O modules in factory automation cabinets. IC Role / Device Role / Timing Role: 125 kSPS simultaneous sampling of isolated analog inputs using internal 2.5 V reference and TSSOP footprint. Use Value: 16-lead TSSOP occupies same PCB area as 8-lead SOIC, reducing board space by >50% versus dual 4-channel alternatives. | Use Scenario: Digitizing baseband analog signals in DSL or cable modem line cards requiring low THD and fast settling. IC Role / Device Role / Timing Role: High-fidelity ADC stage preceding DSP processing, leveraging 71 dB SNR and –80 dB THD at 10 kHz. Use Value: Full-power bandwidth of 2.5 MHz supports Nyquist sampling of 1.25 MHz baseband signals without aliasing filters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 8-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200 kSPS, 2.7–5.25 V, but only 4-channel; uses external reference only; no internal reference | Lacks 8-channel integration and internal reference - requires external ref design and additional MUX for 8 inputs | Select when higher throughput (200 kSPS) is critical and system already provides precision external reference |
| MAX11131ETE+ | 12-bit, 500 kSPS, 2.7–3.6 V only; integrated reference (2.048 V); SPI-only interface; 16-pin TQFN | Narrower supply range and fixed 2.048 V reference limit flexibility in 5 V systems or custom reference designs | Select for ultra-low-power, high-throughput applications where 3 V operation and compact TQFN are prioritized over 5 V compatibility |
Compared with ADS7822U and MAX11131ETE+, AD7888ARUZ-REEL uniquely combines 8-channel count, internal 2.5 V reference, 5 V tolerance, and sub-µA shutdown - making it optimal for space- and battery-constrained systems needing full integration without external support components.
Availability
AD7888ARUZ-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial process monitoring requiring stable component supply and long-term production continuity.
Supply support for AD7888ARUZ-REEL 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD7888ARUZ-REEL belongs to Analog Devices' precision data acquisition product line, designed specifically for low-power, multi-channel sensor interfacing in portable and embedded systems where size, energy efficiency, and accuracy are co-optimized.
FAQ
What is the guaranteed no-missed-codes performance of the AD7888ARUZ-REEL?
The AD7888ARUZ-REEL is a B-grade device with guaranteed no-missed-codes performance across its full 12-bit range (0 to 4095) over the operating temperature range of –40°C to +105°C. This is confirmed in the DC accuracy specifications table, where differential nonlinearity is specified as –1/+1.5 LSB max, ensuring monotonic behavior and absence of code gaps under all valid operating conditions for the AD7888ARUZ-REEL.
Does the AD7888ARUZ-REEL support external reference voltages, and what is the acceptable range?
Yes, the AD7888ARUZ-REEL supports external reference voltages applied to the REF IN/REF OUT pin. The valid range is 1.2 V to VDD, where VDD is between 2.7 V and 5.25 V. When an external reference is used, the internal 2.5 V reference must be disabled by setting the REF bit in the control register to ensure optimal performance and avoid contention. This capability allows system-level reference sharing and improved absolute accuracy in the AD7888ARUZ-REEL.
What are the power management modes available on the AD7888ARUZ-REEL, and how are they configured?
The AD7888ARUZ-REEL offers four power management modes: Normal Operation (PM1=0, PM0=0), Full Shutdown (PM1=0, PM0=1), Autoshutdown (PM1=1, PM0=0), and Autostandby (PM1=1, PM0=1). These are set via bits PM1 and PM0 in the 8-bit control register, loaded on the DIN pin during the first 8 SCLK rising edges after CS assertion. Autoshutdown reduces current to ≤1 µA at 2.7–3.6 V with 5 µs wake-up, making it ideal for duty-cycled sensing in the AD7888ARUZ-REEL.
How does the AD7888ARUZ-REEL handle analog input channel selection?
The AD7888ARUZ-REEL selects among its eight single-ended analog inputs (AIN1–AIN8) using the ADD2, ADD1, and ADD0 bits in the control register. These three address bits decode to one of eight channels per Table II in the datasheet (e.g., 000 = AIN1, 111 = AIN8). The selected channel is converted on the next conversion cycle after the register is loaded. On power-up, the default is AIN1; returning from shutdown retains the last-selected channel - a deterministic behavior critical for reliable sequencing in the AD7888ARUZ-REEL.
What is the serial interface timing requirement for achieving 125 kSPS throughput with the AD7888ARUZ-REEL?
To achieve 125 kSPS throughput, the AD7888ARUZ-REEL requires a 2 MHz SCLK frequency, as specified in the timing characteristics table. Each conversion consumes exactly 16 SCLK cycles: 14.5 for conversion and 1.5 for track/hold acquisition. With CS asserted, the full 16-cycle transaction (including control register load and 16-bit data read) completes in 8 µs, enabling the maximum sustained rate. Timing parameters such as t1 (CS-to-SCLK setup) and t3 (data access time) must also be met - all verified across –40°C to +105°C for the AD7888ARUZ-REEL.
AD7888ARUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 125k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- 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:
- -40°C ~ 105°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7888ARUZ-REEL FAQ
1.How can I place an order for AD7888ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7888ARUZ-REEL 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 AD7888ARUZ-REEL reliable?
The price and inventory of AD7888ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7888ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7888ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7888ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7888ARUZ-REEL?
AD7888ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7888ARUZ-REEL 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 AD7888ARUZ-REEL?
For technical support, including AD7888ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7888ARUZ-REEL requirements.
6.How does Aetrix verify that AD7888ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7888ARUZ-REEL 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 AD7888ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7888ARUZ-REEL?
All AD7888ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7888ARUZ-REEL, 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 AD7888ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD7888ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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