My Inquiry
My Account
Analog Devices Inc. AD7887ARZ
- Part No.:
- AD7887ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7887ARZ.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7887ARZ 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-compatible serial interface - used in battery-powered medical instruments and portable data acquisition systems.
For engineers reviewing the AD7887ARZ datasheet, AD7887ARZ pinout, AD7887ARZ application, or AD7887ARZ equivalent, key selection considerations include its 8-lead MSOP package, dual-mode analog input configuration (AIN0/AIN1 or AIN0/VREF), shutdown current of 1 μA max, straight binary output coding, and guaranteed no missing codes to 11 bits in A-grade operation.
Technical Context
The AD7887ARZ implements a charge-redistribution DAC architecture with integrated track-and-hold, acquiring signals in 500 ns. Its control logic supports four power management modes via PM1/PM0 bits, including automatic shutdown after conversion (Mode 3) and standby with reference active (Mode 4).
It features flexible reference handling: in single-channel mode, AIN1/VREF serves as 2.5 V reference output or external reference input (1.2 V to VDD); in dual-channel mode, VDD supplies the reference, enabling 0–VDD input range on both AIN0 and AIN1. The serial interface operates with SCLK up to 2 MHz and outputs 16-bit frames (4 leading zeros + 12-bit result, MSB first).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with straight binary output - delivers 4096 discrete levels for precision measurement. |
| Throughput Rate | 125 kSPS maximum - supports real-time sampling of signals up to 2.5 MHz full-power bandwidth. |
| Supply Voltage | 2.7 V to 5.25 V single supply - enables direct interfacing with 3 V and 5 V microcontrollers without level-shifting. |
| Reference Options | Internal 2.5 V ±50 ppm/°C reference or external 1.2 V to VDD reference - allows flexible scaling of input range (0 to VREF or 0 to VDD). |
| Power Consumption | 2 mW typical at 5 V / 125 kSPS; 3 μW in shutdown - suitable for multi-year battery life in portable instrumentation. |
| Dynamic Performance | 71 dB SNR at 10 kHz input - meets requirements for high-fidelity signal capture in medical and telecom applications. |
| Input Configuration | Configurable single-ended dual-channel (AIN0 & AIN1) or single-channel with reference access - simplifies BOM by unifying sensor and reference path design. |
Pinout & Package
AD7887ARZ is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), RoHS-compliant and qualified for automotive applications (−40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select / Shutdown Control | Active-low input that initiates conversion and frames serial transfer; doubles as hardware shutdown enable when held high in Mode 1. |
| VDD | Power Supply Input | Single 2.7–5.25 V supply; provides reference voltage for dual-channel mode and powers internal circuitry. |
| GND | Analog Ground Reference | Common AGND connection point - must be tied to system analog ground plane near this pin to minimize noise coupling. |
| AIN1/VREF | Configurable Terminal | In single-channel mode: 2.5 V reference output or external reference input (1.2–VDD); in dual-channel mode: second analog input (0–VDD range). |
| AIN0 | Analog Input Channel 0 | Primary single-ended input; range is 0–VREF (single-channel) or 0–VDD (dual-channel) - accepts DC-coupled sensor outputs. |
| DIN | Serial Data Input | Writes 8-bit control register on rising SCLK edges; 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 falling SCLK edges - compatible with SPI, QSPI, MICROWIRE, and DSP interfaces. |
| SCLK | Serial Clock Input | Provides clock for both serial communication and internal ADC conversion timing - supports up to 2 MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| Smallest 12-bit dual/single-channel ADC | 8-lead MSOP package (3.0 × 3.0 mm) reduces PCB area by >40% vs. SOIC - critical for space-constrained portable devices. |
| Lowest power 12-bit ADC in class | 1 μA shutdown current and 3 μW power-down dissipation - extends battery life in always-on monitoring systems. |
| Flexible power management | Four selectable modes (Modes 1–4) including auto-shutdown post-conversion - eliminates need for external power sequencing logic. |
| Read-only operation capability | Tying DIN to GND enables single-channel use without control register writes - simplifies firmware and reduces MCU GPIO usage. |
| Channel-to-channel isolation | −80 dB at 25 kHz - ensures accurate simultaneous sampling in dual-sensor applications like differential pressure or ECG lead pairs. |
| Automotive qualification | AEC-Q100 stress-tested for −40°C to +125°C operation - supports deployment in engine control, ADAS sensor nodes, and infotainment subsystems. |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous vital sign monitoring (e.g., pulse oximetry, ECG front-end) in handheld clinical devices with multi-year battery life. IC Role / Device Role / Timing Role: 12-bit SAR ADC digitizing analog sensor outputs at ≤125 kSPS with low-latency track-and-hold acquisition (500 ns). Use Value: Micropower shutdown mode (1 μA) and internal 2.5 V reference eliminate external components, reducing BOM count and board area. |
Use Scenario: Environmental parameter logging (temperature, humidity, gas concentration) in remote field sensors powered by coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Dual-channel ADC sampling two independent transducers simultaneously with channel isolation >80 dB. Use Value: Configurable single/dual mode and 2.7–5.25 V supply range allow one design to support multiple sensor types and battery chemistries. |
| Industrial Process Monitoring | Automotive Sensor Interface |
|
Use Scenario: Analog input module in PLC I/O cards measuring 4–20 mA loop signals and thermocouple outputs in factory automation. IC Role / Device Role / Timing Role: Precision ADC with ±1 LSB DNL (B grade) and 71 dB SNR capturing slow-varying industrial signals with high linearity. Use Value: Internal reference stability (±50 ppm/°C) and wide input range (0–VDD) simplify calibration and reduce drift over temperature. |
Use Scenario: Front-end digitization for cabin air quality sensors, seat occupancy detection, or battery cell voltage monitoring in EVs. IC Role / Device Role / Timing Role: AEC-Q100-qualified ADC providing robust 12-bit resolution under automotive EMI and thermal stress conditions. Use Value: MSOP package withstands reflow profiles for automotive PCB assembly; shutdown mode supports ultra-low quiescent current in sleep states. |
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 |
|---|---|---|---|
| AD7476ARTZ-REEL7 | Single-channel only; 1 MSPS max; no internal reference; requires external 2.5 V reference; 6-lead SOT-23 package. | Higher speed but lacks dual-channel flexibility and reference integration - suited for cost-sensitive, single-sensor designs where throughput >125 kSPS is required. | Select when speed >125 kSPS is mandatory and dual-channel operation is unnecessary; verify external reference stability meets system accuracy goals. |
| ADS7822U | 12-bit, 200 kSPS; SPI interface; internal reference; 8-lead SOIC package; higher typical IDD (1.2 mA at 200 kSPS) and no automotive qualification. | Higher throughput and same pin count but larger SOIC footprint and higher power - appropriate for non-automotive industrial controls needing faster sampling. | Choose when 200 kSPS is needed and MSOP size is not critical; confirm thermal performance meets ambient requirements without automotive-grade screening. |
Compared with AD7887ARZ, AD7476ARTZ-REEL7 trades dual-channel capability and integrated reference for smaller size and higher speed, while ADS7822U offers greater throughput at the expense of power efficiency and automotive compliance - AD7887ARZ uniquely balances micropower, dual-channel configurability, and AEC-Q100 qualification in an MSOP package.
Availability
AD7887ARZ is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable data loggers, industrial process monitors, and automotive cabin sensor interfaces requiring stable component supply across long production lifecycles.
Supply support for AD7887ARZ 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, with design centers worldwide.
The AD7887 belongs to Analog Devices' precision SAR ADC product line, engineered for low-power, high-accuracy data acquisition in portable, industrial, and automotive systems where size, energy efficiency, and reliability are critical.
FAQ
What is the maximum sampling rate supported by the AD7887ARZ?
The AD7887ARZ 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 specified AC performance - including 71 dB SNR - at this rate with a 10 kHz input sine wave, making it suitable for medium-speed signal acquisition in portable instrumentation.
Does the AD7887ARZ require an external reference voltage?
No, the AD7887ARZ includes an internal 2.5 V reference with ±50 ppm/°C temperature coefficient, 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 to override the internal reference. In dual-channel mode, VDD serves as the reference source, eliminating need for any external reference component - simplifying design and reducing BOM cost.
How does the AD7887ARZ handle dual-channel versus single-channel operation?
The AD7887ARZ configures its analog inputs via the SIN/DUAL bit (Bit 4) in the 8-bit control register. When set to 0, it operates in single-channel mode: AIN0 is the input (0–VREF range), and AIN1/VREF becomes the reference terminal. When set to 1, it enters dual-channel mode: both AIN0 and AIN1 accept inputs (0–VDD range), and VDD supplies the reference. Default power-up state is single-channel read-only mode.
What power management modes are available on the AD7887ARZ?
The AD7887ARZ supports four power management modes controlled by PM1/PM0 bits (Bits 1–0): Mode 1 (CS-controlled shutdown), Mode 2 (always-on), Mode 3 (auto-shutdown after conversion), and Mode 4 (standby with reference active). Mode 3 reduces average current to 12 μA at 1 kSPS, while Mode 4 enables fast wake-up (<5 μs) with 210 μA typical current - allowing precise trade-offs between latency and energy savings.
Is the AD7887ARZ pin-compatible with other Analog Devices 12-bit ADCs?
The AD7887ARZ uses an 8-lead MSOP package with a unique pinout optimized for dual functionality of AIN1/VREF. It is not pin-compatible with AD7476ARTZ-REEL7 (6-lead SOT-23) or ADS7822U (8-lead SOIC), due to differing pin counts, spacing, and signal assignments. Direct replacement requires PCB layout revision; however, its functional flexibility and low-power profile make it a preferred upgrade path for space-constrained, battery-operated designs.
AD7887ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -
AD7887ARZ FAQ
1.How can I place an order for AD7887ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7887ARZ 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 AD7887ARZ reliable?
The price and inventory of AD7887ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7887ARZ is usually 5 days.
3.What payment methods are accepted for AD7887ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7887ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7887ARZ?
AD7887ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7887ARZ 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 AD7887ARZ?
For technical support, including AD7887ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7887ARZ requirements.
6.How does Aetrix verify that AD7887ARZ is sourced from the original manufacturer or authorized distributors?
All AD7887ARZ 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 AD7887ARZ meets industry standards.
7.What is the process for return or replacement of AD7887ARZ?
All AD7887ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7887ARZ, 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 AD7887ARZ part is unused and in its original packaging.
Return procedure for AD7887ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7887ARZ 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…
