My Inquiry
My Account
Analog Devices Inc. AD7887BR-REEL7
- Part No.:
- AD7887BR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7887BR-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,161
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7887BR-REEL7 from Analog Devices is a micropower, 12-bit successive approximation register (SAR) ADC supporting dual- or single-channel operation, 125 kSPS throughput, 2.7 V to 5.25 V single-supply operation, and SPI/QSPI/MICROWIRE-compatible serial interface - used in battery-powered medical instruments and portable instrumentation where low power and compact size are critical.
For engineers reviewing the AD7887BR-REEL7 datasheet, AD7887BR-REEL7 pinout, AD7887BR-REEL7 application, or AD7887BR-REEL7 equivalent, key selection considerations include its 8-lead MSOP package, 1 μA shutdown current, 2.5 MHz full-power bandwidth, configurable reference architecture (internal 2.5 V or external 1.2 V–VDD), and dual-channel isolation of −80 dB at 25 kHz.
Technical Context
The AD7887BR-REEL7 implements a charge-redistribution SAR architecture with integrated track-and-hold, acquiring signals in 500 ns and completing conversion in 7.25 μs (at 2 MHz SCLK). Its control logic supports four power modes via PM1/PM0 bits, including automatic shutdown after conversion (Mode 3) and standby with internal reference active (Mode 4).
It features dual functional pin AIN1/VREF: in single-channel mode it serves as 2.5 V reference output/input (±50 ppm/°C drift); in dual-channel mode it becomes second analog input (0–VDD range), while VDD supplies the reference. Input coding is straight binary, LSB = VREF/4096, with guaranteed no missing codes to 11 bits (B-grade).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part-in-4096 quantization granularity for precision sensor or signal monitoring applications. |
| Throughput Rate | 125 kSPS - enables real-time sampling of baseband signals up to 2.5 MHz (Nyquist-limited), suitable for high-speed modem front-ends. |
| Supply Voltage | 2.7 V to 5.25 V - supports direct interfacing with 3 V and 5 V logic systems without level-shifting or auxiliary regulators. |
| Shutdown Current | 1 μA max (VDD = 2.7–3.6 V) - reduces system quiescent power by >99% during idle periods in portable devices. |
| SNR @ 10 kHz | 71 dB typ - provides >11.5 effective number of bits (ENOB) for clean digitization of audio-band and biomedical waveforms. |
| Channel Isolation | −80 dB @ 25 kHz - ensures minimal crosstalk between AIN0 and AIN1 in dual-channel acquisition of independent sensors. |
| Reference Flexibility | Internal 2.5 V ±50 ppm/°C or external 1.2 V–VDD - allows calibration-grade stability or system-level rail-referenced scaling. |
Pinout & Package
AD7887BR-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 |
|---|---|---|
| 1 - CS | Chip Select / Shutdown Control | Active-low input that initiates conversion and frames serial data; high state forces shutdown in Mode 1, enabling ultra-low-power sleep without external logic. |
| 2 - VDD | Power Supply Input | Single 2.7–5.25 V supply; also serves as reference source in dual-channel mode, eliminating need for external reference in rail-to-rail input systems. |
| 3 - GND | Analog Ground Reference | Common return for all internal circuitry; must be tied to system AGND plane near this pin to minimize noise coupling into sensitive analog path. |
| 4 - AIN1/VREF | Configurable Terminal | In single-channel mode: 2.5 V reference output/input (±50 ppm/°C); in dual-channel mode: second analog input (0–VDD range). |
| 5 - AIN0 | Analog Input Channel 0 | Primary input with 0–VREF range (single-channel) or 0–VDD range (dual-channel); 20 pF input capacitance requires careful PCB layout for high-frequency signals. |
| 6 - DIN | Serial Data Input | Writes 8-bit control register on rising SCLK edges; tying to GND enables read-only single-channel operation without microcontroller intervention. |
| 7 - DOUT | Serial Data Output | Outputs 16-bit frame (4 leading zeros + 12-bit result, MSB first) on falling SCLK edge; three-state capable for bus sharing. |
| 8 - SCLK | Serial Clock Input | Drives both serial interface and internal ADC conversion clock; supports up to 2 MHz, defining minimum conversion time of 7.25 μs. |
Key Features
| Feature | Design Value |
|---|---|
| Smallest 12-bit dual/single ADC | 8-lead MSOP package (3 mm × 3 mm) reduces PCB area by >40% vs. SOIC, critical for space-constrained wearables and handhelds. |
| Lowest power 12-bit ADC | 2 mW typical at 5 V / 125 kSPS; 3 μW in shutdown - extends battery life in PDA and remote sensor nodes beyond 1 year. |
| Flexible power management | Four selectable modes (Modes 1–4) enable automatic post-conversion shutdown or fast-wake standby - eliminates firmware overhead for power sequencing. |
| Read-only ADC capability | DIN tied to GND configures default single-channel mode with no control register writes - simplifies integration in fixed-function systems. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Standard serial timing and framing allow direct connection to ADSP-21xx, ARM Cortex-M, and TI C2000 microcontrollers without protocol translation. |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG, temperature, and SpO₂ sensor outputs in handheld patient monitors. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two independent analog biosignals simultaneously with <−80 dB channel isolation. Use Value: Enables synchronized multi-parameter monitoring with 12-bit resolution and 125 kSPS rate while consuming <2 mW from coin-cell or Li-ion battery. |
Use Scenario: Long-term environmental sensing (temperature, humidity, pressure) in remote field deployments. IC Role / Device Role / Timing Role: Single-channel read-only ADC sampling sensor outputs at programmable intervals using auto-shutdown (Mode 3). Use Value: Achieves sub-μA average current draw over duty-cycled operation, extending 10-year deployment life on primary lithium batteries. |
| Industrial Process Monitoring | High-Speed Modem Front-End |
|
Use Scenario: Monitoring analog feedback signals (current, voltage, position) in PLC I/O modules with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-channel ADC operating from 3.3 V supply with internal reference disabled, using VDD as reference for rail-to-rail input scaling. Use Value: Eliminates external reference IC and associated BOM cost while maintaining ±1 LSB DNL and 71 dB SNR across industrial temperature range. |
Use Scenario: Digitizing IF signals in ADSL/VDSL line card receivers requiring wide dynamic range and low distortion. IC Role / Device Role / Timing Role: Single-channel ADC capturing 2.5 MHz full-power bandwidth signals with 71 dB SNR and −80 dB THD. Use Value: Supports >10-bit ENOB at Nyquist frequency, enabling robust QAM-64/256 demodulation without oversampling or external filtering. |
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, 2.7–5.5 V, 8-pin SOIC only; no internal reference; requires external REF; higher 3.5 mW power at 5 V. | Best suited for designs already using external precision reference and needing higher speed than AD7887BR-REEL7. | Select when throughput >125 kSPS is mandatory and board space allows SOIC; avoid if internal reference or MSOP footprint is required. |
| MAX11100ETE+ | 12-bit, 100 kSPS, 2.7–3.6 V only; internal 2.048 V reference; 12-pin TQFN; 0.5 μA shutdown; SPI-only interface. | Ideal for ultra-low-voltage, ultra-low-power 3 V systems where 2.048 V reference aligns with DAC or sensor scaling. | Prefer for 3 V-only battery systems prioritizing sub-μA shutdown; not suitable for 5 V operation or dual-channel mode. |
Compared with ADS7822U and MAX11100ETE+, the AD7887BR-REEL7 uniquely combines dual-channel flexibility, internal 2.5 V reference with external overdrive capability, MSOP packaging, and 125 kSPS performance across 2.7–5.25 V - making it optimal for mixed-voltage portable instrumentation requiring minimal external components and layout area.
Availability
AD7887BR-REEL7 is available at Aetrix Electronics and suitable for battery-powered medical instruments, industrial process monitors, portable data loggers, and high-speed modem front-ends requiring stable component supply across automotive and industrial temperature ranges (−40°C to +125°C).
Supply support for AD7887BR-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7887BR-REEL7 belongs to Analog Devices' precision data acquisition portfolio, designed specifically for low-power, space-constrained embedded systems requiring high-resolution analog sensing without sacrificing speed or supply flexibility.
FAQ
What is the maximum sampling rate supported by the AD7887BR-REEL7?
The AD7887BR-REEL7 achieves a maximum throughput rate of 125 kSPS when operated with a 2 MHz SCLK. This corresponds to a total conversion + acquisition time of 16 SCLK cycles (7.25 μs conversion + 0.75 μs acquisition). At lower clock frequencies, the rate scales linearly - e.g., 1 MHz SCLK yields ~62.5 kSPS. The 125 kSPS rating is validated across the full −40°C to +125°C temperature range and 2.7–5.25 V supply.
Does the AD7887BR-REEL7 include an internal voltage reference?
Yes, the AD7887BR-REEL7 integrates a 2.5 V internal reference with ±50 ppm/°C temperature coefficient, accessible via the AIN1/VREF pin in single-channel mode. This reference can be overdriven by an external source (1.2 V to VDD) for improved accuracy or system-level scaling. In dual-channel mode, the internal reference is disabled by default (REF bit = 1), and VDD serves as the reference.
Can the AD7887BR-REEL7 operate in a read-only configuration without writing to its control register?
Yes, the AD7887BR-REEL7 supports read-only operation by tying the DIN pin permanently to GND. In this configuration, it defaults to single-channel mode (AIN0 only), uses the internal 2.5 V reference, and ignores control register writes - simplifying hardware design for fixed-function applications like sensor front-ends where channel count and reference are static.
What power management modes does the AD7887BR-REEL7 support, and how are they selected?
The AD7887BR-REEL7 offers four power management modes controlled by PM1/PM0 bits in its 8-bit control register: Mode 1 (CS-gated shutdown), Mode 2 (always-on), Mode 3 (auto-shutdown after conversion), and Mode 4 (standby with reference active). Mode 3 reduces average power significantly in burst-sampling applications, while Mode 4 enables faster wake-up than full shutdown - both configurable without external circuitry.
Is the AD7887BR-REEL7 pin-compatible with other members of the AD7887 family?
Yes, the AD7887BR-REEL7 shares identical pinout and functionality with all AD7887 variants (e.g., AD7887AR, AD7887BRZ) in the 8-lead MSOP package. Differences are limited to grade (B-grade specifies ±1 LSB DNL), packaging (REEL7 = tape-and-reel), and ordering suffixes - ensuring drop-in replacement across temperature and reliability grades without layout changes.
AD7887BR-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:
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7887BR-REEL7 FAQ
1.How can I place an order for AD7887BR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7887BR-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 AD7887BR-REEL7 reliable?
The price and inventory of AD7887BR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7887BR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7887BR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7887BR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7887BR-REEL7?
AD7887BR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7887BR-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 AD7887BR-REEL7?
For technical support, including AD7887BR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7887BR-REEL7 requirements.
6.How does Aetrix verify that AD7887BR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7887BR-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 AD7887BR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7887BR-REEL7?
All AD7887BR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7887BR-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 AD7887BR-REEL7 part is unused and in its original packaging.
Return procedure for AD7887BR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7887BR-REEL7 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
