Analog Devices Inc. AD7988-5CCPZ-RL

Overview

AD7988-5CCPZ-RL from Analog Devices is a 16-bit, pseudo-differential successive approximation register (SAR) analog-to-digital converter with 500 kSPS throughput, 2.5 V single-supply operation, and SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface. It features ±0.6 LSB typical INL, 91.5 dB SNR at 10 kHz, and operates across −40°C to +125°C for high-precision data acquisition in medical instruments and automated test equipment.

For engineers reviewing the AD7988-5CCPZ-RL datasheet, AD7988-5CCPZ-RL pinout, AD7988-5CCPZ-RL application, or AD7988-5CCPZ-RL equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for precision SAR ADC selection in space- and power-constrained industrial systems.

Technical Context

The AD7988-5CCPZ-RL implements a zero-latency SAR architecture with proprietary sampling control that initiates conversion on the CNV rising edge and holds the analog input (IN+ relative to IN−) over a 400 ns acquisition time. Its pseudo-differential input accepts 0 V to VREF (2.5 V–5.0 V) ranges while rejecting common-mode noise up to 60 dB at 1 kHz.

Digital interfacing uses a flexible 3- or 4-wire SPI-compatible bus with separate VIO (1.71 V–5.5 V) enabling direct connection to 1.8 V/2.5 V/3 V/5 V logic. Daisy-chain mode allows multiple ADCs to share one SDO line with 16-cycle pipeline delay, while CS mode enables standard chip-select operation with SDO enabled when CNV is low.

Key Specifications

Pinout & Package

AD7988-5CCPZ-RL is housed in a 10-lead 3 mm × 3 mm LFCSP (CP-10-9) package with exposed pad connected to GND for thermal and noise performance. The package has θJA = 80°C/W and θJC = 15°C/W, supporting high-density PCB layouts with minimal thermal rise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with AD7988-1CCPZ-RL and AD7685BRMZ-REEL, AD7988-5CCPZ-RL uniquely balances 500 kSPS speed, 3.5 mW power, and mixed-voltage interface flexibility-making it optimal for next-generation compact ATE and battery-operated medical devices requiring both performance and integration efficiency.

Availability

AD7988-5CCPZ-RL is available at Aetrix Electronics and suitable for automated test equipment, medical instrumentation, and industrial machine automation requiring stable component supply, long-term lifecycle support, and guaranteed lot traceability.

Supply support for AD7988-5CCPZ-RL 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 and a 50+ year heritage in precision data conversion.

AD7988-5CCPZ-RL belongs to Analog Devices' PulSAR® family of low-power, high-accuracy SAR ADCs engineered for demanding applications in medical diagnostics, industrial process control, and test & measurement where resolution, speed, and thermal stability are critical.

FAQ

What is the maximum sampling rate of the AD7988-5CCPZ-RL?

The AD7988-5CCPZ-RL achieves a maximum throughput of 500 kSPS, with conversion time of 1.2 µs (C grade) or 1.6 µs (B grade) from CNV rising edge to valid data on SDO. This rate is maintained across the full −40°C to +125°C temperature range and supports real-time acquisition of fast-changing signals in automated test equipment and motor control systems. The AD7988-5CCPZ-RL does not require oversampling to reach its rated speed.

Does the AD7988-5CCPZ-RL support daisy-chaining with other ADCs?

Yes, the AD7988-5CCPZ-RL supports daisy-chain mode: when SDI is low at the CNV rising edge, the device enters chain mode and outputs upstream ADC data on SDO with a fixed 16-cycle delay. This enables synchronous multi-channel sampling using a single SDO line and shared SCK/CNV, reducing PCB routing complexity in high-channel-count data acquisition systems. The AD7988-5CCPZ-RL maintains full 16-bit resolution and timing integrity in this configuration.

What reference voltage range is supported by the AD7988-5CCPZ-RL?

The AD7988-5CCPZ-RL accepts an external reference voltage (REF) from 2.4 V to 5.1 V, independent of the 2.5 V VDD supply. At VREF = 5 V, it delivers 91.5 dB SNR and ±0.6 LSB typical INL; at VREF = 2.5 V, SNR drops to 87 dB but power consumption decreases significantly. The REF pin requires a dedicated 10 µF capacitor to GND for optimal noise rejection. The AD7988-5CCPZ-RL does not include an internal reference.

Can the AD7988-5CCPZ-RL interface directly with a 1.8 V microcontroller?

Yes, the AD7988-5CCPZ-RL supports direct 1.8 V logic interfacing via its dedicated VIO pin (1.71 V–5.5 V), which sets digital input thresholds and output voltage levels independently of VDD. When VIO = 1.8 V, SCK, SDI, and CNV accept standard 1.8 V logic levels, and SDO drives compliant 1.8 V outputs. This eliminates level shifters in mixed-voltage systems and preserves timing margins, as confirmed in Table 3 and Figure 2 of the AD7988-5CCPZ-RL datasheet.

What is the operating temperature range for the AD7988-5CCPZ-RL?

The AD7988-5CCPZ-RL is fully specified from −40°C to +125°C, with all key parameters-including INL (±1.25 LSB), gain error drift (±0.35 ppm/°C), and power dissipation-guaranteed across this range. Its LFCSP package (CP-10-9) provides θJA = 80°C/W, enabling reliable operation in high-temperature environments such as under-hood automotive electronics and industrial motor drives without thermal derating. The AD7988-5CCPZ-RL undergoes extended burn-in and characterization per Analog Devices' automotive-grade qualification flow.