Analog Devices Inc. AD9937BCPZRL-27

Overview

AD9937BCPZRL-27 from Analog Devices is a highly integrated CCD signal processor with embedded Precision Timing™ generator, combining 12 MSPS correlated double sampling, 10-bit 12 MHz ADC, 6–40 dB programmable VGA, black level clamp, and full on-chip timing control for CCD sensors. It delivers 1.7 ns clock resolution at 12 MHz and operates over –25°C to +85°C in digital still cameras and industrial imaging systems.

For engineers reviewing the AD9937BCPZRL-27 datasheet, AD9937BCPZRL-27 pinout, AD9937BCPZRL-27 application, or AD9937BCPZRL-27 equivalent, key selection considerations include pixel-rate timing precision, CDS/ADC analog chain performance, programmable drive strength for H/RS/V clocks, shutter mode flexibility (electronic/mechanical), and serial register configuration via 3-wire interface.

Technical Context

The AD9937BCPZRL-27 integrates an analog front end (CDS, VGA, clamp, 10-bit ADC) with a fully programmable timing generator featuring a 1.7 ns resolution Precision Timing core. It supports master/slave operation and generates all essential CCD clocks: RS, six-channel horizontal (H1A–D, H2A/B), four-phase vertical (V1A/B–V4), sensor gate pulses (TG1A/B, TG3A/B), substrate reset (OFD), and sync signals (HD/VD/LM).

Timing is configured via 3-wire serial interface (SLD/SCK/SDA) with dedicated registers for edge locations (e.g., RSPOSLOC, H1NEGLOC), pulse widths (CLPOB), and sequence control (VTP, H/LM, Shutter registers). The device implements VD-synchronous and asynchronous register updates and supports masking, polarity inversion, and special horizontal pattern generation.

Key Specifications

Pinout & Package

The AD9937BCPZRL-27 is housed in a 56-lead LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad, optimized for compact PCB layout and thermal dissipation in imaging modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CCD signal processing applications.

Compared with TDC1308IPWPR and LM98714EDT/NOPB, the AD9937BCPZRL-27 uniquely combines 10-bit no-missing-codes conversion, on-chip CDS, and 1.7 ns programmable timing in a single chip - making it optimal for medium-speed, high-fidelity CCD systems where analog integrity and precise clock edge control are non-negotiable.

Availability

AD9937BCPZRL-27 is available at Aetrix Electronics and suitable for digital still cameras, industrial machine vision systems, and medical endoscopy equipment requiring stable component supply and long-term manufacturability.

Supply support for AD9937BCPZRL-27 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.

The AD9937BCPZRL-27 belongs to Analog Devices' Precision Timing™ CCD signal processor product line, engineered specifically for high-fidelity, low-noise imaging systems requiring tightly synchronized analog signal conditioning and sub-nanosecond clock generation.

FAQ

What is the maximum pixel clock frequency supported by the AD9937BCPZRL-27?

The AD9937BCPZRL-27 supports a maximum VCKM master clock frequency of 12 MHz, corresponding to a 12 MSPS pixel rate. This is specified across the full operating temperature range (–25°C to +85°C) and is validated in the Timing Specifications table. Exceeding this frequency may result in timing violations, reduced ADC accuracy, or failure to meet 1.7 ns edge resolution guarantees.

Does the AD9937BCPZRL-27 include a correlated double sampler (CDS) and is it mandatory for operation?

Yes, the AD9937BCPZRL-27 integrates a dedicated correlated double sampler (CDS) block that removes CCD reset noise and fixed-pattern offsets. While the CDS can be bypassed via register configuration, its use is strongly recommended for standard CCD operation - the device's analog specifications (e.g., 0.3 LSB_rms noise, ±0.4 LSB DNL) assume CDS is enabled and properly configured.

How many independent timing outputs does the AD9937BCPZRL-27 provide, and what are their functions?

The AD9937BCPZRL-27 provides 21 dedicated timing outputs: RS (reset), H1A–H1D and H2A/B (6 horizontal clocks), V1A/B–V4 (4 vertical clocks), TG1A/B and TG3A/B (4 sensor gate pulses), OFD (substrate reset), LM (line memory), HD (horizontal sync), and VD (vertical sync). Each is individually programmable for edge location, polarity, and drive strength - enabling full control of interline, frame-transfer, and progressive-scan CCD architectures.

Can the AD9937BCPZRL-27 operate in both master and slave modes, and how is mode selection implemented?

Yes, the AD9937BCPZRL-27 supports both master and slave timing modes. Mode selection is controlled by bit 5 of Register 4 (MASTER bit): setting it to 1 configures master mode (internal VCKM drives all timing), while 0 enables slave mode (external HD/VD or VCKM-locked operation). Slave mode allows synchronization to external video standards or multi-device timing chains without requiring an external clock generator.

What package type and thermal characteristics apply to the AD9937BCPZRL-27?

The AD9937BCPZRL-27 is packaged in a 56-lead LFCSP (CP-56) with exposed thermal pad. Its thermal resistance θ_JA is 24.9°C/W, and it is rated for junction temperatures up to 150°C. The package supports reflow soldering per JEDEC J-STD-020 and requires proper PCB thermal vias under the exposed pad to maintain operation within the –25°C to +85°C ambient range.