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Analog Devices Inc. AD7887BRZ-REEL7
- Part No.:
- AD7887BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7887BRZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
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Product details
Overview
AD7887BRZ-REEL7 from Analog Devices is a micropower, 12-bit successive approximation register (SAR) ADC with dual/single-channel operation, 125 kSPS throughput, 2.7 V to 5.25 V single-supply operation, and internal 2.5 V reference - used in battery-powered medical instruments and portable instrumentation where low power and compact size are critical.
For engineers reviewing the AD7887BRZ-REEL7 datasheet, AD7887BRZ-REEL7 pinout, AD7887BRZ-REEL7 application, or AD7887BRZ-REEL7 equivalent, key selection considerations include its 8-lead MSOP package, SPI/QSPI/MICROWIRE-compatible serial interface, configurable single/dual-channel mode, and 1 μA shutdown current - all verified for automotive-grade temperature range (−40°C to +125°C).
Technical Context
The AD7887BRZ-REEL7 implements a charge-redistribution SAR architecture with integrated track-and-hold, supporting either single-ended AIN0-only operation (with AIN1/VREF as reference) or dual-channel AIN0/AIN1 operation (with VDD as reference). Its control register enables software-configurable power modes (shutdown, standby, full-power) and channel selection.
It features straight binary output coding, 0 to VREF (single-channel) or 0 to VDD (dual-channel) input ranges, and a 2.5 MHz full-power bandwidth. The serial interface operates with SCLK up to 2 MHz and supports MSB-first 16-bit frames (4 leading zeros + 12-bit result), compatible with SPI, QSPI, MICROWIRE, and DSP controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step for precise signal digitization |
| Throughput Rate | 125 kSPS - supports real-time sampling of signals up to 2.5 MHz (−3 dB bandwidth) |
| Supply Voltage | 2.7 V to 5.25 V - enables direct interfacing with 3 V and 5 V logic/system rails without level shifting |
| Shutdown Current | 1 μA max - reduces system standby power in battery-critical applications like PDAs and handheld meters |
| SNR @ 10 kHz | 71 dB typ - ensures high-fidelity acquisition of low-noise sensor or audio-band signals |
| INL (B Grade) | ±1 LSB max - guarantees monotonicity and ≤11-bit no-missing-code performance |
| Reference | Internal 2.5 V ±2% (2.45 V–2.55 V) - eliminates external reference component count in space-constrained designs |
Pinout & Package
AD7887BRZ-REEL7 is housed in an 8-lead, 3 mm × 3 mm, 0.65 mm pitch MSOP package (JEDEC MO-187AA), optimized for high-density PCB layouts and thermal performance (θJA = 205.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select / Shutdown Control | Active-low input that initiates conversion and frames serial data; high state forces shutdown (1 μA) in default mode |
| VDD | Power Supply Input | Single 2.7 V–5.25 V supply rail; serves as reference source in dual-channel mode |
| GND | Analog Ground Reference | Common AGND tie point for analog circuitry; requires low-impedance connection to system analog ground plane |
| 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 Channel 0 | Primary single-ended input; range = 0 to VREF (single-channel) or 0 to VDD (dual-channel) |
| DIN | Serial Data Input | Writes 8-bit control register on SCLK rising edge; can be tied to GND for read-only single-channel operation |
| DOUT | Serial Data Output | Outputs 16-bit frame (4 zeros + 12-bit result) MSB-first on SCLK falling edge |
| SCLK | Serial Clock Input | Provides clock for both serial communication and internal SAR conversion timing (up to 2 MHz) |
Key Features
| Feature | Design Value |
|---|---|
| Flexible channel configuration | Software-selectable single- or dual-channel mode via 8-bit control register - eliminates hardware redesign for varying sensor count |
| Ultra-low shutdown power | 1 μA max shutdown current - extends battery life in intermittent-sampling systems such as wearable health monitors |
| Integrated reference | On-chip 2.5 V ±50 ppm/°C reference - removes need for external precision reference and associated decoupling components |
| Multi-protocol serial interface | SPI/QSPI/MICROWIRE/DSP compatibility - simplifies integration with diverse microcontrollers and DSPs without protocol translation |
| Automotive qualification | AEC-Q100 qualified (Grade 1: −40°C to +125°C) - enables use in engine control, ADAS sensors, and infotainment subsystems |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG waveform digitization in handheld patient monitors with 72-hour battery life. IC Role / Device Role / Timing Role: Primary 12-bit SAR ADC acquiring dual-lead analog signals at 125 kSPS with internal reference stability. Use Value: 1 μA shutdown current and 2 mW active power enable extended runtime; MSOP package fits within tight enclosure constraints. | Use Scenario: Environmental sensor node logging temperature, humidity, and pressure over weeks on coin-cell power. IC Role / Device Role / Timing Role: Low-power, single-channel ADC sampling multiple sensors sequentially using software-controlled channel switching. Use Value: Configurable power modes (Mode 3 auto-shutdown) reduce average current to <10 μA between samples without firmware overhead. |
| Industrial Field Transmitters | Automotive Cabin Sensing Systems |
Use Scenario: 4–20 mA loop-powered transmitter measuring process variables in hazardous locations. IC Role / Device Role / Timing Role: Precision ADC converting conditioned sensor outputs with guaranteed monotonicity (±1 LSB INL) and 2.5 MHz bandwidth. Use Value: Internal 2.5 V reference eliminates calibration drift vs. external references; SOIC/MSOP packaging supports conformal coating and ruggedized assembly. | Use Scenario: Occupancy detection and air quality monitoring inside vehicle cabins using CO₂, VOC, and PM2.5 sensors. IC Role / Device Role / Timing Role: Dual-channel ADC simultaneously sampling thermistor and NDIR sensor outputs with >80 dB channel isolation. Use Value: −80 dB channel-to-channel isolation prevents crosstalk between analog inputs; AEC-Q100 qualification ensures reliability under automotive thermal cycling. |
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 | 8-bit resolution, 200 kSPS, 2.7–5.25 V, 8-pin SOIC only - lacks internal reference and dual-channel capability | Lower resolution limits use to non-critical industrial controls; no AEC-Q100 qualification | Select when cost sensitivity outweighs resolution and automotive compliance requirements |
| MAX11131AUT+T | 12-bit, 500 kSPS, 2.7–3.6 V only, internal 2.048 V reference, 8-pin μMAX - higher speed but narrower supply range | Not suitable for 5 V systems or automotive temperature extremes (−40°C to +125°C) | Choose for ultra-high-speed, single-supply 3 V embedded systems where 5 V compatibility is unnecessary |
Compared with ADS7822U and MAX11131AUT+T, AD7887BRZ-REEL7 uniquely balances 12-bit precision, dual/single-channel flexibility, internal 2.5 V reference, 5 V tolerance, and automotive qualification - making it optimal for space- and power-constrained measurement systems requiring broad operating conditions.
Availability
AD7887BRZ-REEL7 is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data loggers, and industrial field transmitters requiring stable component supply across automotive and industrial temperature grades.
Supply support for AD7887BRZ-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 product line delivers micropower, high-speed SAR ADCs in miniature packages for battery-operated and space-constrained measurement systems - emphasizing low quiescent current, flexible channel architecture, and robust serial interfacing.
FAQ
What is the maximum sampling rate supported by the AD7887BRZ-REEL7?
The AD7887BRZ-REEL7 supports 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 full 12-bit performance at this rate, with a full-power bandwidth of 2.5 MHz, enabling accurate digitization of signals up to that frequency.
Does the AD7887BRZ-REEL7 require an external reference voltage?
No, the AD7887BRZ-REEL7 includes an internal 2.5 V reference (2.45 V to 2.55 V, ±50 ppm/°C) accessible via the AIN1/VREF pin in single-channel mode. An external reference (1.2 V to VDD) may be applied to that same pin if higher accuracy or different voltage scaling is needed. In dual-channel mode, the reference defaults to VDD, and the internal reference is disabled.
How does the AD7887BRZ-REEL7 handle power management in battery-powered systems?
The AD7887BRZ-REEL7 offers four programmable power modes via its control register: Mode 1 (CS-gated shutdown), Mode 2 (always-on), Mode 3 (auto-shutdown after conversion), and Mode 4 (standby with reference active). In shutdown mode, current drops to 1 μA max, reducing system-level power consumption significantly - critical for extending battery life in devices like handheld medical tools and environmental sensors.
Can the AD7887BRZ-REEL7 operate in single-channel mode without connecting the DIN pin?
Yes. The AD7887BRZ-REEL7 supports read-only single-channel operation by tying the DIN pin permanently to GND. In this configuration, the device defaults to single-channel mode with AIN0 as the input and AIN1/VREF as the reference output. No serial commands are required, simplifying design for fixed-function applications and reducing MCU GPIO usage.
Is the AD7887BRZ-REEL7 suitable for automotive applications?
Yes. The AD7887BRZ-REEL7 is qualified for automotive applications per AEC-Q100 (Grade 1: −40°C to +125°C ambient). It features guaranteed performance across this full temperature range, robust ESD protection (4 kV HBM), and thermal characteristics validated for under-hood and cabin environments - making it appropriate for engine control, HVAC sensing, and driver monitoring systems.
AD7887BRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7887BRZ-REEL7 FAQ
1.How can I place an order for AD7887BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7887BRZ-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 AD7887BRZ-REEL7 reliable?
The price and inventory of AD7887BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7887BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7887BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7887BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7887BRZ-REEL7?
AD7887BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7887BRZ-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 AD7887BRZ-REEL7?
For technical support, including AD7887BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7887BRZ-REEL7 requirements.
6.How does Aetrix verify that AD7887BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7887BRZ-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 AD7887BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7887BRZ-REEL7?
All AD7887BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7887BRZ-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 AD7887BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7887BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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