AD7888ARZ-REEL - 12-Bit 125kSPS 8-Ch Micropower ADC | ADI
MPN: AD7888ARZ-REEL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.75 | $67.50 |
| 100 | $6 | $600.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.8 | $4,800.00 |
| 2,500 | $4.2 | $10,500.00 |
AD7888ARZ-REEL Overview
An SAR ADC is a type of data converter that uses a binary-search successive-approximation algorithm to digitize an analog input, producing one sample per conversion cycle without the latency of pipelined or sigma-delta architectures. The AD7888 belongs to the SAR sub-family of analog-to-digital converters, which sits under the broader ADC category within data-converter ICs in the signal-chain block of mixed-signal systems. Low-power CMOS construction keeps typical dissipation at 2 mW during normal operation and only 3 uW in full power-down mode, making the part well-suited to battery-powered monitoring applications.
Key features of the AD7888ARZ-REEL include a flexible reference arrangement (internal 2.5V reference or external 1.2V to VDD reference via the REF IN/REF OUT pin), a shutdown pin that drops quiescent current to microamp levels between conversions, and guaranteed operation over the -40C to +105C automotive-industrial temperature range. The wide supply range and simple SPI-compatible serial interface also ease integration with microcontrollers and DSPs that lack parallel ADC ports.
Architecturally, the AD7888 uses a charge-redistribution DAC array with a sample-and-hold on each channel select, an internal oscillator that can be overdriven by an external clock for deterministic conversion timing, and automatic power-down between conversions to extend battery life. The 8 single-ended inputs share one ADC core, so channel switching is handled through the on-chip analog multiplexer; this keeps the package pin count to 16 while still serving multi-channel data-acquisition tasks. The serial interface supports daisy-chaining of multiple AD7888 devices for systems that need more than 8 channels.
Typical applications include portable and battery-powered data acquisition, multi-channel sensor monitoring (temperature, pressure, strain, flow), industrial process control front ends, instrumentation and panel meters, and automotive sensor interfaces. Designers should pay particular attention to reference decoupling and analog-input filtering: place a 0.1 uF ceramic close to REF IN/REF OUT and a small RC network on each AIN to limit broadband noise that would otherwise degrade the converter's SNR. This page consolidates distributor pricing, 8-channel SAR alternative selections, and practical design notes that go beyond the manufacturer datasheet.
Drop-in alternatives for AD7888ARZ-REEL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7888ARZ-REEL (same form factor and footprint) — differing in Packaging, Resolution, Architecture, Digital Interface, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7888ARZ-REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7888ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7888BRZ-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7887ARZ-REEL
✅ Drop-In✓ In Stock
$4.25 / Unit
View Datasheet →AD7264BSTZ-5-RL7
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →AD7888ARZ-REEL Maximum Ratings & Electrical Characteristics
| Resolution | 12 bit |
| Number of Channels | 8 single-ended inputs |
| Sampling Rate | 125 kSPS |
| Supply Voltage | 2.7 V to 5.25 V |
| Supply Current (typ) | 2 mW power dissipation |
| Power-Down Current | 3 uW (typical) |
| Input Track-and-Hold Acquisition Time | 500 ns |
| Internal Reference Voltage | 2.5 V |
| External Reference Range | 1.2 V to VDD |
| Data Interface | SPI, QSPI, MICROWIRE, DSP-compatible serial |
| ADC Architecture | SAR (Successive Approximation) |
| Operating Temperature Range | -40C to +105C |
| Package | 16-SOIC (R-16), 3.90 mm body width |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR), 13-inch reel |
| MSL Level | MSL 1 (Unlimited) per partgenie.ai |
| RoHS Compliance | ROHS3 Compliant |
AD7888ARZ-REEL Pin Configuration
| Pin 1 | AIN1 — Analog Input 1 |
| Pin 2 | AIN2 — Analog Input 2 |
| Pin 3 | AIN3 — Analog Input 3 |
| Pin 4 | AIN4 — Analog Input 4 |
| Pin 5 | AIN5 — Analog Input 5 |
| Pin 6 | AIN6 — Analog Input 6 |
| Pin 7 | AIN7 — Analog Input 7 |
| Pin 8 | AIN8 — Analog Input 8 |
| Pin 9 | GND — Ground |
| Pin 10 | REF IN/REF OUT — Reference Input / 2.5 V Reference Output |
| Pin 11 | VDD — Supply Voltage (2.7 V to 5.25 V) |
| Pin 12 | SCLK — Serial Clock Input |
| Pin 13 | DOUT — Serial Data Output |
| Pin 14 | DIN — Serial Data Input (for daisy chain) |
| Pin 15 | CS — Chip Select Input (active low) |
| Pin 16 | SHDN — Shutdown Input (active low) |
Typical Applications
AD7888ARZ-REEL is suitable for 6 applications: Battery-Powered Data Acquisition, Industrial Process Control Front End, Multi-Channel Sensor Monitoring (Temp/Pressure/Strain), Portable Instrumentation and Panel Meters, Automotive Sensor Interfaces, Data Acquisition Cards and PC-Based Modules.
Battery-Powered Data Acquisition
The AD7888ARZ-REEL is an excellent fit for battery-powered multi-channel data acquisition, where its 2.7 V to 5.25 V single-supply operation allows direct connection to Li-Ion or 3.3 V system rails. Its 12-bit resolution and 125 kSPS throughput comfortably digitize temperature, voltage, current, and pressure signals from up to 8 sensors at low duty cycle. The 2 mW typical power dissipation extends operating time, and the 3 uW power-down current further stretches battery life when the host MCU gates conversions via the shutdown pin. In a portable logger design, place the AD7888ARZ-REEL between the sensor MUX and an SPI-capable microcontroller, decoupling REF IN/REF OUT with a 0.1 uF ceramic to keep noise out of the internal 2.5 V reference.
Recommended
Industrial Process Control Front End
The AD7888ARZ-REEL fits industrial process control front ends where multiple analog sensor channels must be digitized into a central PLC or industrial controller. Its 8 single-ended inputs accept standard 0 V to 5 V or 0 V to 10 V sensor signals (with external scaling), and the SPI-compatible serial interface drops onto any industrial MCU or DSP. The -40C to +105C operating range covers factory-floor cabinets, and the CMOS architecture holds typical dissipation to 2 mW, eliminating thermal concerns in sealed enclosures. For process-control applications, pair the AD7888ARZ-REEL with instrumentation amplifiers on each AIN line, and use the internal 2.5 V reference for ratiometric measurements that cancel excitation drift.
Recommended
Multi-Channel Sensor Monitoring (Temp/Pressure/Strain)
The AD7888ARZ-REEL's 8-channel single-ended input multiplexer directly supports multi-channel sensor monitoring arrays for temperature, pressure, strain, and flow sensors in instrumentation. Its 500 ns input track-and-hold acquisition time preserves the integrity of fast-changing signals, and the SPI daisy-chain capability lets designers stack multiple AD7888 devices on one bus to monitor 16, 24, or more channels with the same firmware. Place small RC anti-aliasing filters on each AIN line (typically 1 kohm plus 100 pF) to limit broadband noise, and select 2.5 V internal reference for ratiometric bridge measurements where excitation drift is a concern.
Recommended
Portable Instrumentation and Panel Meters
The AD7888ARZ-REEL is well suited to handheld DMMs, panel meters, and portable instrumentation where 8 single-ended analog inputs must be read on demand without continuous ADC activity. The shutdown pin lets the host MCU power down the ADC between conversions, holding total quiescent current to microamp levels and preserving battery runtime. With 12-bit resolution (1 LSB at 2.5 V reference is approximately 0.6 mV) and 125 kSPS throughput, the part handles typical voltage, current, and temperature measurements with adequate margin. Designers can pair the AD7888ARZ-REEL with a low-power MCU like the ADuCM3027 or ADuCM4050 and a small TFT LCD to build a compact 8-channel panel meter that runs from a single Li-Ion cell.
Recommended
Automotive Sensor Interfaces
The AD7888ARZ-REEL fits non-safety-critical automotive sensor interface designs such as body-control modules, HVAC controls, and battery-monitoring front ends. Its -40C to +105C operating range covers under-hood and cabin environments, and its 8-channel input multiplexer handles multiple 0 V to 5 V sensor signals from a single ADC. While the standard AD7888ARZ-REEL is not AEC-Q100 qualified, designers can refer to the ADuC706x family for AEC-Q100 alternatives built around similar SAR cores. For automotive designs, route analog inputs with short traces and ground planes, decouple REF IN/REF OUT with 0.1 uF plus 10 uF, and protect each AIN line with TVS diodes to withstand load-dump transients.
Recommended
Data Acquisition Cards and PC-Based Modules
The AD7888ARZ-REEL is a strong fit for USB- or PCIe-based data acquisition modules that digitize 8 analog signals and stream them to a host PC over a serial bus. Its high-speed SPI-compatible serial interface can sustain the 125 kSPS throughput over short board-level traces to an FPGA or MCU that bridges to USB. With a single 2.7 V to 5.25 V supply and low 2 mW dissipation, it integrates easily into bus-powered modules. Design the front-end with anti-aliasing RC filters on each AIN, use the internal 2.5 V reference for ratiometric measurements or overdrive REF IN/REF OUT with a precision external reference when absolute accuracy matters.
Recommended
Recommended Products Summary
Engineering reference data for AD7888ARZ-REEL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7888ARZ-REEL7 | AD7888ARZ | AD7888BRZ-REEL | AD7887ARZ-REEL | AD7264BSTZ-5-RL7 |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (R-16) | 16-SOIC (R-16) - same | 16-SOIC (R-16) - same | 16-SOIC (R-16) - same | 16-SOIC (R-16) - same | 16-SOIC - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit |
| Number of Channels | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended | 10 single-ended | 2 differential |
| Sampling Rate | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS | 1000 kSPS |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 4.75 V to 5.25 V |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C (B grade) | -40C to +105C | -40C to +85C |
| Approx. Unit Price (1k pcs) | $4.80 | $4.80 | $4.85 | $5.20 | $6.10 | $7.50 |
Key Differentiators
- Standard reel packaging in 16-SOIC footprint (vs AD7888ARZ-REEL7)
- Wider operating temperature range than typical SOIC ADCs (vs AD7264BSTZ-5-RL7)
- 8 single-ended inputs in 16-SOIC, simpler firmware than multiplexed parts (vs AD7887ARZ-REEL)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 11) of the AD7888ARZ-REEL, with a 10 uF bulk capacitor on the same supply rail. Keep the VDD trace short and wide to minimize inductance, and use a separate analog ground island tied to the system ground at a single point. This decoupling arrangement keeps digital switching currents from corrupting the internal 2.5 V reference and prevents reference-induced gain errors on the conversion result.
Do not leave unused analog inputs floating on the AD7888ARZ-REEL. Tie any unused AIN1-AIN8 pins to GND or a known mid-supply voltage through a resistor; floating inputs can pick up stray charge that introduces crosstalk between active channels during multiplexer switching. Also, add anti-aliasing RC filters (typically 1 kohm in series with 100 pF to ground) on each AIN line to limit broadband noise folding back into the conversion result.
When using the internal 2.5 V reference of the AD7888ARZ-REEL, decouple REF IN/REF OUT (pin 10) with a 0.1 uF ceramic capacitor in parallel with a 10 uF electrolytic or tantalum. Place the reference capacitor within 5 mm of the pin and keep its ground return short. If higher accuracy is required, overdrive REF IN/REF OUT with an external low-noise reference such as the ADR01 or ADR02, but make sure the external reference can drive the 0.5 mA reference load current specified in the datasheet.
Compliance Information
ROHS3 compliant per partgenie.ai summary; standard AD7888ARZ-REEL is not AEC-Q100 qualified - choose AEC-Q100 qualified ADuC706x family for safety-critical automotive applications.
