My Inquiry
My Account
Analog Devices Inc. AD7887WARMZ
- Part No.:
- AD7887WARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7887WARMZ.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7887WARMZ 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 automotive-grade temperature range (−40°C to +125°C), ideal for battery-powered instrumentation and portable medical devices.
For engineers reviewing the AD7887WARMZ datasheet, AD7887WARMZ pinout, AD7887WARMZ application, or AD7887WARMZ equivalent, key selection considerations include its 8-lead MSOP package, configurable analog input range (0–VREF or 0–VDD), shutdown current ≤1 μA, track-and-hold acquisition time of 500 ns, and guaranteed no missing codes to 11 bits in B-grade configuration.
Technical Context
The AD7887WARMZ implements a charge-redistribution DAC architecture with on-chip track-and-hold, enabling full-power signal conversion up to 2.5 MHz bandwidth. Its control logic supports four power management modes-including automatic shutdown post-conversion-and an 8-bit write-only register for mode, channel, and reference selection.
It operates in two distinct analog input configurations: single-channel mode (AIN0 only, AIN1/VREF as 2.5 V reference output/input) or dual-channel mode (AIN0 and AIN1 both active, reference derived from VDD). Input coding is straight binary, LSB = VREF/4096, and serial data output is MSB-first with four leading zeros.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with straight binary output coding; LSB = VREF/4096 enables precise 0.024% full-scale step resolution. |
| Throughput Rate | 125 kSPS maximum with 2 MHz SCLK; conversion time + acquisition = 16 SCLK cycles (7.25 μs at 2 MHz). |
| Supply Range | 2.7 V to 5.25 V single supply; supports both 3 V and 5 V system rails without level-shifting. |
| Power Consumption | 850 μA typical at 125 kSPS (2.1–3.5 mW); drops to 1 μA max in shutdown mode-critical for battery life in portable systems. |
| Input Bandwidth | 2.5 MHz full-power bandwidth (−3 dB); allows accurate digitization of fast transients in sensor and modem applications. |
| DC Accuracy (B Grade) | ±1 LSB integral nonlinearity and ±1 LSB differential nonlinearity; guarantees no missing codes to 11 bits for reliable monotonicity. |
| Reference Options | Internal 2.5 V ±50 ppm/°C reference (output on AIN1/VREF) or external reference 1.2 V to VDD; enables flexible scaling of 0–VREF input range. |
Pinout & Package
AD7887WARMZ is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), qualified for automotive applications and compatible with standard reflow profiles including Pb-free soldering at 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select / Shutdown Control | Active-low input that initiates conversion and frames serial transfer; doubles as hardware shutdown pin-high = power-down (≤1 μA). |
| 2 - VDD | Power Supply Input | Single 2.7–5.25 V supply; provides reference voltage for ADC in dual-channel mode (0–VDD input range). |
| 3 - GND | Analog Ground Reference | Common ground for all internal circuitry; must be tied to system AGND plane near this pin to minimize noise coupling. |
| 4 - AIN1/VREF | Configurable Terminal | In single-channel mode: 2.5 V reference output/input (internal or external); in dual-channel mode: second analog input (AIN1, 0–VDD range). |
| 5 - AIN0 | Analog Input Channel 0 | Primary analog input; range = 0–VREF (single-channel) or 0–VDD (dual-channel); 20 pF input capacitance requires careful driver design. |
| 6 - DIN | Serial Data Input | Writes 8-bit control register on SCLK rising edge; can be tied to GND for read-only single-channel operation. |
| 7 - DOUT | Serial Data Output | Outputs 16-bit frame (4 leading zeros + 12-bit result, MSB first) on SCLK falling edge; high-impedance when CS high. |
| 8 - SCLK | Serial Clock Input | Provides clock for serial interface and ADC conversion timing; supports up to 2 MHz; defines acquisition (1.5 cycles) and conversion (14.5 cycles) timing. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Power Management | Four selectable modes-including auto-shutdown after conversion (Mode 3) and standby with reference active (Mode 4)-enable dynamic power optimization per sampling rate. |
| Dual-/Single-Channel Configurability | On-the-fly mode switching via control register bit SIN/DUAL; eliminates need for separate part numbers or PCB variants for different channel counts. |
| Automotive-Qualified Packaging | MSOP-8 package qualified per AEC-Q100; supports −40°C to +125°C operation with traceable sourcing and extended lifecycle support. |
| SPI-Compatible Serial Interface | Fully compatible with SPI, QSPI, MICROWIRE, and DSP host interfaces; no external protocol translation required for microcontroller integration. |
| Low Input Leakage & High Isolation | ±5 μA max analog input leakage and −80 dB channel-to-channel isolation at 25 kHz ensure minimal crosstalk and stable readings in multi-sensor systems. |
Applications
| Portable Medical Instrumentation | Battery-Powered PDA Systems |
|---|---|
|
Use Scenario: Continuous analog monitoring of ECG, pulse oximetry, or glucose sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: 12-bit SAR ADC acquiring dual physiological signals at 125 kSPS with <500 ns acquisition window and low power consumption. Use Value: Enables >100-hour battery life using coin-cell or Li-ion sources while maintaining clinical-grade accuracy (±1 LSB INL) and channel isolation. |
Use Scenario: Real-time digitization of touch-screen controller voltages, battery voltage sensing, and ambient light detection in legacy PDAs. IC Role / Device Role / Timing Role: Single-supply 12-bit ADC interfacing directly to 3 V microcontrollers via SPI, supporting simultaneous dual-input polling. Use Value: Reduces BOM count by consolidating multiple 10-bit ADCs; internal reference eliminates external voltage reference IC and associated layout area. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Modules |
|
Use Scenario: Digitizing outputs from pressure, temperature, and position sensors in factory automation I/O modules. IC Role / Device Role / Timing Role: Dual-channel ADC operating in 0–VDD mode (VDD = 3.3 V) with programmable power-down between conversions to meet energy budget constraints. Use Value: Delivers 71 dB SNR at 10 kHz while consuming only 2.1 mW-enabling dense sensor node deployment without thermal derating. |
Use Scenario: Monitoring door lock actuators, seat position sensors, and HVAC feedback in automotive body electronics. IC Role / Device Role / Timing Role: AEC-Q100 qualified ADC providing robust 12-bit measurements across temperature extremes with integrated reference stability (±50 ppm/°C). Use Value: Eliminates need for external reference trimming and reduces qualification effort-supports ASIL-B functional safety requirements via predictable parametric behavior. |
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 |
|---|---|---|---|
| ADS7822ID | 12-bit, 200 kSPS, 2.7–5.25 V, but uses pseudo-differential input and lacks internal reference; requires external REF. | Best suited for higher-speed single-ended or pseudo-differential sensor inputs where reference flexibility outweighs power savings. | Select ADS7822ID only if throughput >125 kSPS is mandatory and system already provides precision reference. |
| MAX11100EUA+ | 12-bit, 100 kSPS, 2.7–3.6 V only, internal 2.048 V reference, SPI-compatible, but not automotive-qualified. | Targeted at cost-sensitive industrial controls where −40°C to +85°C operation suffices and lower speed is acceptable. | Choose MAX11100EUA+ for non-automotive 3 V systems prioritizing ultra-low cost over temperature range and reference accuracy. |
Compared with ADS7822ID and MAX11100EUA+, AD7887WARMZ uniquely combines automotive qualification, internal 2.5 V reference with external override capability, dual/single-channel configurability, and sub-1 μA shutdown-making it optimal for space- and power-constrained automotive and portable medical designs requiring guaranteed monotonicity and wide supply tolerance.
Availability
AD7887WARMZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive body control modules, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7887WARMZ 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 AD7887 product line delivers micropower, high-speed SAR ADCs optimized for space-constrained, battery-operated, and automotive-qualified applications-emphasizing low supply voltage operation, flexible reference architecture, and robust serial interface compatibility.
FAQ
What is the maximum sampling rate supported by the AD7887WARMZ?
The AD7887WARMZ achieves a maximum throughput rate of 125 kSPS when operated with a 2 MHz serial clock. This rate is fixed by its internal architecture: conversion requires 14.5 SCLK cycles and acquisition 1.5 SCLK cycles, totaling 16 cycles per sample. At 2 MHz, this yields exactly 125,000 samples per second. The AD7887WARMZ does not support oversampling or decimation modes to increase effective resolution beyond this rate.
Does the AD7887WARMZ require an external reference voltage?
No-the AD7887WARMZ integrates a precision 2.5 V reference with ±50 ppm/°C temperature coefficient, accessible on the AIN1/VREF pin in single-channel mode. It also supports external reference voltages from 1.2 V to VDD applied to the same pin. In dual-channel mode, the ADC references VDD directly, eliminating need for any external reference. Thus, AD7887WARMZ operates fully autonomously in most configurations.
How does the AD7887WARMZ handle dual-channel versus single-channel operation?
The AD7887WARMZ configures channel count via bit 4 (SIN/DUAL) in its 8-bit control register: '0' selects single-channel mode (AIN0 only, AIN1/VREF becomes VREF pin); '1' enables dual-channel mode (AIN0 and AIN1 active, reference sourced from VDD). Default power-up state is single-channel read-only mode-no register write needed unless dual-channel or power-mode changes are required.
What power management modes are available on the AD7887WARMZ?
The AD7887WARMZ offers four hardware-configurable power modes via PM1/PM0 bits: Mode 1 (CS-controlled shutdown), Mode 2 (always-on), Mode 3 (auto-shutdown after each conversion), and Mode 4 (standby with reference active). Mode 3 reduces average current to ~12 μA at 1 kSPS, while Mode 4 enables faster wake-up than full shutdown-critical for event-triggered sampling in low-duty-cycle systems.
Is the AD7887WARMZ pin-compatible with other members of the AD7887 family?
Yes-AD7887WARMZ shares identical 8-lead MSOP pinout and function mapping with all AD7887 variants (e.g., AD7887BRMZ, AD7887ARUZ), including SOIC and MSOP packages. Pin functions (CS, VDD, GND, AIN1/VREF, AIN0, DIN, DOUT, SCLK) and electrical behavior are fully consistent across grades and packages, enabling drop-in replacement within the same footprint and layout.
AD7887WARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADI0012
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- -
AD7887WARMZ FAQ
1.How can I place an order for AD7887WARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7887WARMZ 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 AD7887WARMZ reliable?
The price and inventory of AD7887WARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7887WARMZ is usually 5 days.
3.What payment methods are accepted for AD7887WARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7887WARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7887WARMZ?
AD7887WARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7887WARMZ 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 AD7887WARMZ?
For technical support, including AD7887WARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7887WARMZ requirements.
6.How does Aetrix verify that AD7887WARMZ is sourced from the original manufacturer or authorized distributors?
All AD7887WARMZ 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 AD7887WARMZ meets industry standards.
7.What is the process for return or replacement of AD7887WARMZ?
All AD7887WARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7887WARMZ, 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 AD7887WARMZ part is unused and in its original packaging.
Return procedure for AD7887WARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7887WARMZ 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…
