AD7995YRMZ-0 - 10-Bit SAR ADC, 4-Channel I2C | Analog Devices
MPN： AD7995YRMZ-0 ✓ 啟用中AD7995YRMZ-0 概覽
A successive approximation ADC (SAR ADC) is a type of analog-to-digital converter that uses a binary search algorithm through an internal DAC to converge on the input voltage in N clock cycles for N-bit resolution. SAR ADCs sit in the data-converter hierarchy under analog-to-digital converters, which themselves belong to the broader mixed-signal / data acquisition IC family. They are favored for their deterministic latency, low power consumption, and ease of use in multiplexed multi-channel applications.
The AD7995YRMZ-0 features an integrated track-and-hold amplifier, automatic channel sequencing, and an I2C-compatible interface supporting standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes. With an analog input range of 0 V to VDD, low current consumption, and a small MSOP-8 footprint, it is well suited for space-constrained battery-powered monitoring. Its specified VDD maximum of 5.5 V makes it compatible with both 3.3 V and 5 V system rails.
Typical applications include automotive sensor monitoring (battery management, temperature, pressure), portable instrumentation, system supervision and housekeeping ADCs in micro-controller-based designs, multi-zone thermal monitoring, and industrial process control. The wide operating temperature range also makes it appropriate for outdoor or automotive-grade installations.
When designing with this part, place the decoupling capacitor (typically 100 nF) as close as possible to the VDD pin and observe the I2C address-selection convention used by the -0 suffix. The conversion result register must be read before the next conversion completes to avoid data loss in continuous-conversion mode.
直接替換替代品，適用於 AD7995YRMZ-0 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD7995YRMZ-0 （相同外形與佔位） — 差異在於 Input Type, Number of Input Channels, Sampling Rate, RoHS Status, Architecture.
AD7995YRMZ-1
✅ 直接替換📋 參考替代品（不在目錄中）
AD7991BRMZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD7999BRMZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD7995YRJZ-0RL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADS7828E/250
✅ 直接替換📋 參考替代品（不在目錄中）
MCP3428-E/SN
✅ 直接替換📋 參考替代品（不在目錄中）
AD7995YRMZ-0 最大額定值與電氣特性
| 解析度 | 10 bit |
| Number of Input Channels | 3 or 4 (one pin shared with external reference input) |
| Conversion Architecture | SAR (Successive Approximation) |
| Conversion Time | 1 µs typical |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Analog Input Range | 0 V to VDD |
| Serial Interface | I2C-compatible (Standard / Fast / High-Speed) |
| I2C Address Variant | -0 suffix (specific 7-bit address, see datasheet) |
| 工作溫度範圍 | -40 °C to +125 °C (automotive / YRMZ grade) |
| 封裝 | 8-pin MSOP (MO-187AA / RM-8) |
| 安裝類型 | Surface Mount |
| Integrated Track-and-Hold | Yes |
| Sequencer Operation | Yes (automatic channel sequencing) |
| Linearity Error | 0.0488% (per Partstack listing) |
| Screening Level | Automotive |
| RoHS 狀態 | Compliant |
AD7995YRMZ-0 腳位配置
| 腳位 1 | VDD — Power supply input, 2.7 V to 5.5 V |
| 腳位 2 | GND — Ground reference |
| 腳位 3 | AIN1/REFIN — Analog input 1, also serves as external reference input |
| 腳位 4 | AIN2 — Analog input 2 |
| 腳位 5 | AIN3 — Analog input 3 |
| 腳位 6 | SDA — I2C serial data |
| 腳位 7 | SCL — I2C serial clock |
| 腳位 8 | AD0 — I2C address select / variant-dependent pin |
典型應用
AD7995YRMZ-0 適用於 6 應用s: Automotive Sensor Monitoring, Battery Management & Pack Monitoring, Portable Instrumentation, System Supervision & Housekeeping ADC, Multi-Zone Thermal Monitoring, Industrial Process Control.
Automotive Sensor Monitoring
The AD7995YRMZ-0 fits automotive sensor monitoring with its -40 °C to +125 °C automotive-grade operating range, 10-bit resolution, and 4 single-ended input channels. Its SAR architecture delivers deterministic latency, simplifying sensor fusion timing. Used in cabin body modules for battery voltage, ambient temperature, and door-switch sensing on a 5 V rail, it consumes microamperees in shutdown, supporting always-on systems.
推薦
Battery Management & Pack Monitoring
The AD7995YRMZ-0 is well-matched to multi-cell battery monitoring with four multiplexed inputs that scan pack voltage, current shunt, temperature, and a redundant reference. Its 2.7 V to 5.5 V supply accepts common 3.3 V and 5 V rails. The I2C interface allows multiple ADCs on one bus for high-cell-count packs, and shutdown current is low enough to support sleep modes in portable packs.
推薦
Portable Instrumentation
The AD7995YRMZ-0 enables compact handheld instruments because of its tiny MSOP-8 footprint, low operating current, and 4-channel multiplexing. Multimeter-style instruments use it for range voltage, temperature, and reference inputs. The -40 °C to +125 °C operating range suits outdoor field use, and the I2C interface simplifies connection to low-pin-count microcontrollers.
推薦
System Supervision & Housekeeping ADC
The AD7995YRMZ-0 is commonly used as a microcontroller housekeeping ADC to digitize board-level rails, temperatures, and fan tachometers. Its 4 channels handle 3.3 V core, 1.8 V analog, board temperature, and a redundant monitor with simple external dividers. The automatic sequencer simplifies firmware by cycling through channels without CPU intervention.
推薦
Multi-Zone Thermal Monitoring
The AD7995YRMZ-0 suits multi-zone thermal monitoring with up to four temperature sensors (NTC thermistors or analog temp ICs) multiplexed into a single I2C ADC. Its 1 µs conversion time supports periodic 1 Hz to 1 kHz scans. The -40 °C to +125 °C grade works in industrial enclosures and white-goods applications where multiple heatsinks must be supervised.
推薦
Industrial Process Control
The AD7995YRMZ-0 supports 4-20 mA loop and 0-10 V industrial signal monitoring by digitizing scaled, divided sensor outputs. Its 10-bit resolution is adequate for setpoint comparison and threshold alarms rather than precision measurement. The wide operating temperature range and automotive screening level make it robust for factory floor installations near motors and VFDs.
推薦
推薦產品摘要
工程參考資料，適用於 AD7995YRMZ-0 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD7995YRMZ-1 | AD7991BRMZ | AD7999BRMZ | ADS7828E/250 | MCP3428-E/SN |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Microchip Technology |
| Package | MSOP-8 | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same |
| Resolution | 10 bit | 10 bit | 12 bit | 8 bit | 12 bit | 16 bit |
| Number of Input Channels | 3 or 4 | 3 or 4 | 3 or 4 | 3 or 4 | 8 | 4 |
| Conversion Architecture | SAR | SAR | SAR | SAR | SAR | Delta-Sigma |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.25 V | 2.7 V to 5.5 V |
| Conversion Time | 1 µs typical | 1 µs typical | 1 µs typical | 1 µs typical | 5 µs typical | 8.8 ms (16-bit) |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +85 °C | -40 °C to +125 °C |
| Serial Interface | I2C (Standard / Fast / HS) | I2C (Standard / Fast / HS) | I2C (Standard / Fast / HS) | I2C (Standard / Fast / HS) | I2C (Standard / Fast) | I2C |
主要差異化特點
- Pin-compatible 12-bit upgrade path on same MSOP-8 footprint (對比AD7991BRMZ)
- Same MSOP-8 footprint across the entire AD799x family (8/10/12-bit) (對比AD7999BRMZ (8-bit))
- SAR architecture with 1 µs conversion time vs delta-sigma alternative (對比MCP3428-E/SN (16-bit delta-sigma))
設計說明
Place the VDD decoupling capacitor (100 nF X7R ceramic) as close as possible to pin 1 (VDD) with the ground return to pin 2 (GND). Keep analog input traces short and away from digital switching lines; route SDA/SCL away from analog inputs. For multi-channel scanning at higher rates, add a 1 µF bulk capacitor in parallel to suppress VDD sag during conversion.
The conversion result register must be read before the next conversion completes, or the previous result is overwritten. In continuous-conversion mode, ensure I2C clock speed supports the per-channel conversion throughput. When using the AIN1/REFIN pin as external reference, drive it from a low-impedance source; a high-impedance reference degrades linearity. Address variant suffix (-0 vs -1) is hardware-fixed, so check I2C bus conflicts before placing multiple AD7995s.
Add a small RC filter (typically 100 Ω + 1 nF) at each analog input when the source impedance exceeds 1 kΩ, to prevent kickback from the internal track-and-hold from disturbing the input. For high-impedance sensors, use an op-amp buffer between the sensor and the ADC input. The 0 V to VDD analog input range means negative inputs below ground are not supported without level shifting.
合規資訊
Automotive-grade operating temperature range -40 °C to +125 °C per YRMZ suffix. RoHS and lead-free confirmed by DigiKey listing. AEC-Q100 qualification letter not explicitly stated in available data; verify with Analog Devices for full automotive qualification.
