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Analog Devices Inc. AD7887ARM-REEL7
- Part No.:
- AD7887ARM-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7887ARM-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,965
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Product details
Overview
AD7887ARM-REEL7 from Analog Devices is a micropower, 12-bit successive approximation register (SAR) ADC supporting dual- or single-channel operation with 125 kSPS throughput, 2.7 V to 5.25 V single-supply operation, and internal 2.5 V reference. It features SPI/QSPI/MICROWIRE/DSP-compatible serial interface and operates in battery-powered medical instruments, portable instrumentation, and high-speed modems.
For engineers reviewing the AD7887ARM-REEL7 datasheet, AD7887ARM-REEL7 pinout, AD7887ARM-REEL7 application, or AD7887ARM-REEL7 equivalent, key selection considerations include its 8-lead MSOP package, configurable analog input range (0–VREF or 0–VDD), shutdown current ≤1 μA, 12-bit resolution with ±1 LSB DNL (B grade), and flexible power management across four operating modes.
Technical Context
The AD7887ARM-REEL7 implements a charge-redistribution DAC-based SAR architecture with integrated track-and-hold acquiring signals in 500 ns. Its control logic supports on-the-fly configuration via an 8-bit write-only register, enabling dynamic switching between single-channel (AIN0 only, AIN1/VREF as VREF) and dual-channel (AIN0 + AIN1, VDD as reference) modes.
It uses a straight binary output coding scheme with LSB = VREF/4096, supports external reference overdrive (1.2 V to VDD), and delivers 71 dB SNR at 10 kHz input with 125 kSPS sampling. Power-down mode reduces IDD to 1 μA (VDD = 2.7–3.6 V) while maintaining full functionality upon wake-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for precise analog signal digitization |
| 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 direct interfacing with 3 V and 5 V logic/system rails without level-shifting |
| Reference | Internal 2.5 V ±50 ppm/°C or external 1.2 V to VDD - allows flexible scaling of input range (0–VREF or 0–VDD) |
| Power Consumption | 2.1 mW at 3 V / 3.5 mW at 5 V (normal mode); 3 μW shutdown - extends battery life in portable systems |
| Channel Configuration | Single- or dual-channel via software control - eliminates hardware rework when changing channel count |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP-compatible - ensures drop-in compatibility with common microcontroller peripherals |
| DNL | ±1 LSB max (B grade) - guarantees monotonicity and no missing codes up to 11 bits |
Pinout & Package
AD7887ARM-REEL7 is housed in an 8-lead MSOP (Mini Small Outline Package), 3 mm × 3 mm body, 0.65 mm lead pitch, RoHS-compliant, tape-and-reel format (REEL7 = 1000-piece reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select / Shutdown Control | Active-low input initiating conversion and framing serial data; doubles as hardware shutdown enable in default mode |
| VDD | Power Supply Input | Single 2.7–5.25 V supply; serves as reference source in dual-channel mode |
| GND | Analog Ground Reference | Common return for all internal circuitry; must connect to system AGND plane for optimal noise performance |
| AIN1/VREF | Configurable Terminal | In single-channel mode: 2.5 V reference output/input; in dual-channel mode: second analog input (0–VDD range) |
| AIN0 | Analog Input 0 | Main input channel; range = 0–VREF (single-mode) or 0–VDD (dual-mode) |
| DIN | Serial Data Input | Accepts 8-bit control register writes on SCLK rising edge; can be tied to GND for read-only single-channel operation |
| DOUT | Serial Data Output | Outputs 16-bit frame: four leading zeros + 12-bit MSB-first result on SCLK falling edge |
| SCLK | Serial Clock Input | Provides clock for both serial communication and internal ADC conversion timing (max 2 MHz) |
Key Features
| Feature | Design Value |
|---|---|
| Smallest 12-bit dual/single-channel ADC | 8-lead MSOP package saves PCB area in space-constrained portable designs |
| Lowest power 12-bit ADC | 3 μW shutdown power enables multi-year battery operation in remote sensors |
| Flexible power management | Four selectable modes (shutdown, standby, auto-power-down, full-on) optimize energy use per application demand |
| Read-only ADC capability | Tying DIN to GND eliminates need for microcontroller GPIO or firmware overhead in fixed-function systems |
| Versatile serial interface | SPI/QSPI/MICROWIRE/DSP compatibility avoids protocol translation ICs and simplifies firmware integration |
| Channel-to-channel isolation | −80 dB at 25 kHz minimizes crosstalk in simultaneous-sampling dual-channel applications |
Applications
| Portable Medical Instrumentation | Battery-Powered PDA Sensors |
|---|---|
|
Use Scenario: Digitizing ECG, temperature, or blood oxygen analog signals in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary SAR ADC performing 12-bit conversion at 125 kSPS with internal reference and low-noise track-and-hold. Use Value: 2.1 mW power at 3 V extends single-cell Li-ion battery life beyond 12 months in intermittent-use devices. |
Use Scenario: Sampling touch panel voltage, ambient light, and accelerometer outputs in personal digital assistants. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring two analog inputs sequentially with software-configurable reference and channel selection. Use Value: Single 8-lead MSOP replaces two discrete 8-bit ADCs, reducing BOM count and layout complexity by 40%. |
| Industrial Process Monitoring | High-Speed Modem Signal Conditioning |
|
Use Scenario: Converting 4–20 mA loop sensor outputs and thermocouple voltages in field-mounted controllers. IC Role / Device Role / Timing Role: Precision ADC with ±1 LSB DNL (B grade) and −80 dB channel isolation for reliable multi-sensor acquisition. Use Value: Internal 2.5 V reference with ±50 ppm/°C drift ensures <0.1% full-scale error over −40°C to +125°C operating range. |
Use Scenario: Capturing baseband analog signals prior to digital modulation in DSL or cable modem front-ends. IC Role / Device Role / Timing Role: High-speed 125 kSPS ADC with 2.5 MHz full-power bandwidth preserving signal fidelity up to Nyquist. Use Value: 71 dB SNR at 10 kHz enables >10-bit effective resolution for clean signal reconstruction in noisy RF environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200 kSPS, 2.7–5.25 V, 8-pin SOIC only; no internal reference; requires external REF | Higher throughput but lacks internal 2.5 V reference and MSOP packaging | Select when speed >125 kSPS is required and board space allows SOIC; avoid if internal reference or compact MSOP is needed |
| MAX11131AUT+T | 12-bit, 500 kSPS, 2.7–3.6 V only, 8-pin μMAX; internal 2.048 V ref; SPI-only interface | Narrower supply range, higher speed, smaller package, but incompatible with 5 V systems and QSPI/MICROWIRE | Select for ultra-low-power 3 V systems needing >125 kSPS; not suitable for 5 V or multi-protocol host interfaces |
Compared with ADS7822U and MAX11131AUT+T, AD7887ARM-REEL7 uniquely balances 125 kSPS speed, internal 2.5 V reference, 2.7–5.25 V flexibility, MSOP footprint, and multi-protocol serial support-making it optimal for cost- and space-sensitive dual-voltage portable instrumentation.
Availability
AD7887ARM-REEL7 is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable instrumentation, and high-speed modem signal conditioning requiring stable component supply and long-term industrial availability.
Supply support for AD7887ARM-REEL7 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, founded in 1965 and headquartered in Wilmington, MA.
The AD7887ARM-REEL7 belongs to Analog Devices' precision data acquisition product line, engineered specifically for low-power, high-resolution sampling in portable and automotive-qualified embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7887ARM-REEL7?
The AD7887ARM-REEL7 achieves a maximum throughput rate of 125 kSPS when operated with a 2 MHz SCLK. This corresponds to a total conversion time plus acquisition time of 16 SCLK cycles (7.25 μs). The device maintains this rate across its full 2.7 V to 5.25 V supply range and supports full-power analog input signals up to 2.5 MHz bandwidth.
Does the AD7887ARM-REEL7 include an internal voltage reference?
Yes, the AD7887ARM-REEL7 integrates a precision 2.5 V bandgap reference with ±50 ppm/°C temperature coefficient. The AIN1/VREF pin serves as reference output in single-channel mode and can be overdriven with an external reference from 1.2 V to VDD. In dual-channel mode, the internal reference is disabled and VDD supplies the reference.
Can the AD7887ARM-REEL7 operate in a read-only configuration without using the DIN pin?
Yes, the AD7887ARM-REEL7 supports read-only operation: tie the DIN pin to GND to force default single-channel mode with internal reference enabled. In this configuration, no control register writes are needed-the device continuously converts AIN0 and outputs results on DOUT, simplifying interface design for fixed-function applications.
What power management modes does the AD7887ARM-REEL7 support?
The AD7887ARM-REEL7 offers four programmable power modes via PM1/PM0 bits: Mode 1 (hardware shutdown via CS), Mode 2 (always-on), Mode 3 (auto-shutdown after conversion), and Mode 4 (standby with reference active). Shutdown current is ≤1 μA (2.7–3.6 V), and standby power is 630 μW at 3 V-enabling aggressive energy optimization in duty-cycled systems.
Is the AD7887ARM-REEL7 qualified for automotive applications?
Yes, the AD7887ARM-REEL7 is qualified for automotive applications per the manufacturer's ordering guide, with guaranteed operation from −40°C to +125°C and AEC-Q100 stress testing compliance. Its 8-lead MSOP package, robust ESD rating (4 kV HBM), and wide supply range make it suitable for engine control, body electronics, and ADAS sensor interfaces.
AD7887ARM-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 125k
- Number of Inputs:
- 1, 2
- 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 ~ 125°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7887ARM-REEL7 FAQ
1.How can I place an order for AD7887ARM-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7887ARM-REEL7 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 AD7887ARM-REEL7 reliable?
The price and inventory of AD7887ARM-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7887ARM-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7887ARM-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7887ARM-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7887ARM-REEL7?
AD7887ARM-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7887ARM-REEL7 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 AD7887ARM-REEL7?
For technical support, including AD7887ARM-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7887ARM-REEL7 requirements.
6.How does Aetrix verify that AD7887ARM-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7887ARM-REEL7 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 AD7887ARM-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7887ARM-REEL7?
All AD7887ARM-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7887ARM-REEL7, 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 AD7887ARM-REEL7 part is unused and in its original packaging.
Return procedure for AD7887ARM-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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