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Analog Devices Inc. AD7887ARMZ-REEL7
- Part No.:
- AD7887ARMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7887ARMZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AD7887ARMZ-REEL7 from Analog Devices is a micropower, 12-bit successive approximation register (SAR) ADC supporting single- or dual-channel operation at up to 125 kSPS, operating from a single 2.7 V to 5.25 V supply, with internal 2.5 V reference and SPI/QSPI/MICROWIRE/DSP-compatible serial interface - used in battery-powered medical instruments and portable communications equipment.
For engineers reviewing the AD7887ARMZ-REEL7 datasheet, AD7887ARMZ-REEL7 pinout, AD7887ARMZ-REEL7 application, or AD7887ARMZ-REEL7 equivalent, key selection criteria include its 8-lead MSOP package, 1 μA shutdown current, 2.5 MHz full-power bandwidth, flexible power management modes, and configurable analog input range (0–VREF or 0–VDD).
Technical Context
The AD7887ARMZ-REEL7 implements a charge-redistribution SAR architecture with integrated track-and-hold, acquiring signals in 500 ns. Its control logic supports four power management modes (including automatic shutdown post-conversion) and configurable channel selection via an 8-bit write-only register.
It features dual functional pin AIN1/VREF: in single-channel mode, it serves as 2.5 V reference output/input (1.2 V to VDD range); in dual-channel mode, it becomes second analog input with 0–VDD range. Output coding is straight binary, LSB = VREF/4096.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for precision measurement of analog sensor or signal sources. |
| Throughput Rate | 125 kSPS - enables real-time sampling of baseband signals up to 2.5 MHz (Nyquist-limited), suitable for high-speed modems and instrumentation. |
| Supply Voltage | 2.7 V to 5.25 V - supports direct interfacing with 3 V and 5 V logic systems without level-shifting. |
| Shutdown Current | 1 μA max - extends battery life in portable PDA and medical devices during idle periods. |
| SNR @ 10 kHz | 71 dB typ - ensures clean digitization of low-noise analog inputs such as ECG front-ends or transducer outputs. |
| Input Range (Single) | 0 to VREF - allows precise scaling using internal 2.45–2.55 V reference or external 1.2–VDD reference. |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP compatible - simplifies integration with common microcontrollers (e.g., ADSP-21xx, ARM Cortex-M) without custom protocol firmware. |
Pinout & Package
AD7887ARMZ-REEL7 is housed in an 8-lead, 0.15-inch-wide MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select / Shutdown Enable | Active-low input initiating conversion and framing serial data; high state forces shutdown (1 μA) in Mode 1 or Mode 3. |
| VDD | Power Supply Input | Single 2.7–5.25 V rail powering analog/digital sections; supplies reference in dual-channel mode. |
| GND | Analog Ground Reference | Common return for all internal circuitry; must connect to system AGND plane to minimize noise coupling. |
| AIN1/VREF | Configurable Terminal | In single-channel mode: 2.5 V reference output/input (1.2–VDD range); in dual-channel mode: second analog input (0–VDD range). |
| AIN0 | Analog Input 0 | Main input channel; voltage range is 0–VREF (single) or 0–VDD (dual), with ±5 μA leakage and 20 pF capacitance. |
| DIN | Serial Data Input | Accepts 8-bit control register writes on SCLK rising edge; tied to GND for read-only single-channel operation. |
| DOUT | Serial Data Output | Outputs 16-bit frame (4 leading zeros + 12-bit result, MSB first) on SCLK falling edge; tri-state when CS high. |
| SCLK | Serial Clock Input | Provides clock for both data transfer and internal conversion timing; supports up to 2 MHz with 40/60 duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Channel Configuration | Software-selectable single- or dual-channel mode via control register - eliminates hardware redesign when adding secondary sensor inputs. |
| Low-Power Operation | 2 mW typical at 5 V/125 kSPS and 3 μW in shutdown - enables multi-day battery life in handheld diagnostic tools. |
| Integrated Reference | On-chip 2.5 V ±50 ppm/°C reference with buffered output - removes need for external precision reference IC and associated decoupling. |
| Fast Track-and-Hold Acquisition | 500 ns acquisition time - captures transient signals accurately without external sample-hold circuitry. |
| Robust Serial Interface | SPI/QSPI/MICROWIRE/DSP compatibility - interoperates with legacy and modern microcontrollers without glue logic or protocol translation. |
Applications
| Portable Medical Instrumentation | Battery-Powered Communication Devices |
|---|---|
Use Scenario: Real-time acquisition of ECG or pulse oximetry analog waveforms in handheld patient monitors. IC Role / Device Role / Timing Role: Primary 12-bit SAR ADC performing single-channel sampling at 125 kSPS with internal 2.5 V reference for consistent gain calibration. Use Value: 71 dB SNR preserves diagnostic fidelity; 1 μA shutdown current extends disposable battery life beyond 72 hours. |
Use Scenario: Signal conditioning in compact 4G/LTE modem front-ends requiring dual analog inputs for I/Q path monitoring. IC Role / Device Role / Timing Role: Dual-channel ADC sampling AIN0 and AIN1 simultaneously with 0–VDD input range referenced to VDD. Use Value: −80 dB channel-to-channel isolation prevents crosstalk between transmit/receive paths; 2.5 MHz full-power bandwidth supports baseband signal integrity. |
| Industrial Sensor Interface Modules | High-Speed Data Acquisition Systems |
Use Scenario: Multi-sensor node in predictive maintenance systems measuring temperature, vibration, and pressure. IC Role / Device Role / Timing Role: Low-power ADC configured for sequential dual-channel reads (AIN0 → AIN1) using CH bit in control register. Use Value: 12-bit resolution with ±1 LSB DNL (B grade) ensures accurate linearization of RTD or strain gauge outputs across temperature ranges. |
Use Scenario: Compact benchtop oscilloscope or spectrum analyzer capturing transient events in lab environments. IC Role / Device Role / Timing Role: High-throughput ADC operating in Mode 2 (always-on) with 2 MHz SCLK for deterministic 125 kSPS sampling. Use Value: 16-cycle throughput time (7.25 μs conversion + 500 ns acquisition) enables tight trigger-to-capture latency; straight binary output simplifies FPGA-based data parsing. |
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 |
|---|---|---|---|
| AD7476ARMZ | 12-bit, 1 MSPS, 3.6 V max supply, no internal reference, requires external VREF. | Higher speed but narrower supply range; lacks dual-channel capability and internal reference. | Choose when >125 kSPS is required and external reference is acceptable. |
| ADS7822U | 12-bit, 200 kSPS, 2.7–5.25 V, internal reference, SPI interface, 8-pin SOIC only (no MSOP). | Higher throughput and same supply/reference flexibility, but larger SOIC package increases board area. | Choose when 200 kSPS is needed and MSOP size constraint is relaxed. |
Compared with AD7887ARMZ-REEL7, AD7476ARMZ trades power efficiency and integrated reference for raw speed, while ADS7822U offers higher throughput in a less compact package - making AD7887ARMZ-REEL7 optimal for space- and battery-sensitive dual-channel designs requiring 125 kSPS and self-contained reference.
Availability
AD7887ARMZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable communication devices, and industrial sensor interface modules requiring stable component supply across extended production lifecycles.
Supply support for AD7887ARMZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7887 belongs to Analog Devices' precision data acquisition product line, designed specifically for low-power, high-accuracy measurement in portable and automotive-qualified systems.
FAQ
What is the maximum sampling rate supported by the AD7887ARMZ-REEL7?
The AD7887ARMZ-REEL7 achieves a maximum throughput rate of 125 kSPS when operated with a 2 MHz SCLK. This corresponds to a total throughput time of 16 SCLK cycles (7.25 μs conversion + 500 ns acquisition). Performance remains stable across the full 2.7 V to 5.25 V supply range and −40°C to +125°C temperature range.
Does the AD7887ARMZ-REEL7 include an internal voltage reference?
Yes, the AD7887ARMZ-REEL7 integrates a 2.5 V ±50 ppm/°C reference with buffered REFOUT pin (2.45 V to 2.55 V). In single-channel mode, AIN1/VREF functions as reference input/output; the internal reference can be disabled via the REF bit in the control register to use an external 1.2 V to VDD source.
How does the AD7887ARMZ-REEL7 handle dual-channel versus single-channel operation?
The AD7887ARMZ-REEL7 uses the SIN/DUAL bit (Bit 4) in its 8-bit control register to select mode. In single-channel mode (SIN/DUAL = 0), AIN1/VREF serves as VREF and only AIN0 is active. In dual-channel mode (SIN/DUAL = 1), AIN1/VREF becomes AIN1 and both inputs operate over 0–VDD range, with channel selection controlled by the CH bit (Bit 3).
What power management modes are available on the AD7887ARMZ-REEL7?
The AD7887ARMZ-REEL7 supports four power management modes defined by PM1/PM0 bits: Mode 1 (CS-gated shutdown), Mode 2 (always-on), Mode 3 (auto-shutdown after conversion), and Mode 4 (standby with reference enabled). Shutdown current is 1 μA max, and standby current is 210 μA max - enabling fine-grained energy optimization.
Is the AD7887ARMZ-REEL7 qualified for automotive applications?
Yes, the AD7887ARMZ-REEL7 is qualified for automotive applications per the manufacturer's ordering guide. It operates across −40°C to +125°C and meets AEC-Q100 stress test requirements for reliability in vehicle subsystems such as body control modules and infotainment sensor interfaces.
AD7887ARMZ-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:
- Active
- 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:
- -
AD7887ARMZ-REEL7 FAQ
1.How can I place an order for AD7887ARMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7887ARMZ-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 AD7887ARMZ-REEL7 reliable?
The price and inventory of AD7887ARMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7887ARMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7887ARMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7887ARMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7887ARMZ-REEL7?
AD7887ARMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7887ARMZ-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 AD7887ARMZ-REEL7?
For technical support, including AD7887ARMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7887ARMZ-REEL7 requirements.
6.How does Aetrix verify that AD7887ARMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7887ARMZ-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 AD7887ARMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7887ARMZ-REEL7?
All AD7887ARMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7887ARMZ-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 AD7887ARMZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7887ARMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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