Analog Devices Inc. AD9057BRS-40

Overview

AD9057BRS-40 from Analog Devices is an 8-bit, 40 MSPS monolithic analog-to-digital converter with 120 MHz full-power analog bandwidth, on-chip 2.5 V reference, and track-and-hold circuitry. It operates from a single 5 V analog supply and supports 3 V or 5 V digital logic interfaces, enabling direct integration into RGB video digitizers and QAM demodulator front-ends.

For engineers reviewing the AD9057BRS-40 datasheet, AD9057BRS-40 pinout, AD9057BRS-40 application, or AD9057BRS-40 equivalent, this page delivers verified specifications including SINAD (42 dB at 10.3 MHz), differential nonlinearity (±1.9 LSB), power dissipation (192 mW typical), aperture jitter (5 ps rms), and industrial temperature range (–40°C to +85°C).

Technical Context

The AD9057BRS-40 employs a MagAmp/Flash hybrid architecture with three-stage pipelining, delivering 8-bit resolution at 40 MSPS while maintaining 120 MHz analog bandwidth. Its internal track-and-hold captures input signals on the rising edge of the TTL/CMOS-compatible ENCODE signal, and output data is strobed synchronously with that same edge.

It integrates a bandgap-based 2.5 V reference (±10 ppm/°C tempco) with 300 mA drive capability, supporting both internal reference use (VREF OUT → VREF IN) and external reference adjustment (±10% gain/offset scaling). Power-down mode reduces consumption to <10 mW while retaining reference functionality.

Key Specifications

Pinout & Package

AD9057BRS-40 is housed in a 20-lead Shrink Small Outline Package (SSOP, RS-20), measuring 7.8 mm × 5.3 mm × 1.75 mm, with 0.65 mm lead pitch and JEDEC MO-150AE compliance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, medium-speed ADC applications.

Compared with AD9057BRS-60 and MAX1186EEE+, the AD9057BRS-40 uniquely balances industrial temperature rating, integrated reference/T/H, SSOP-20 footprint, and 40 MSPS performance-making it optimal for cost-sensitive, space-constrained video and communications designs where 60 MSPS is unnecessary.

Availability

AD9057BRS-40 is available at Aetrix Electronics and suitable for RGB video digitizers, QAM demodulator front-ends, and medical ultrasound imaging systems requiring stable component supply across extended production lifecycles.

Supply support for AD9057BRS-40 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 AD9057 product line delivers low-cost, low-power, monolithic ADCs optimized for ease of use in communications, video, and instrumentation-emphasizing integrated references, single-supply operation, and industrial temperature reliability.

FAQ

What is the maximum analog input frequency supported by the AD9057BRS-40?

The AD9057BRS-40 has a full-power analog bandwidth of 120 MHz, meaning it maintains specified dynamic performance (e.g., SINAD ≥42 dB) for input signals up to 120 MHz. This exceeds the Nyquist frequency (20 MHz) for its 40 MSPS sampling rate, enabling robust direct IF sampling applications such as cable TV QAM demodulation where input tones reach 76 MHz with measured 43.5 dB SNR.

Does the AD9057BRS-40 require an external reference voltage?

No-the AD9057BRS-40 includes an internal 2.5 V bandgap reference (VREF OUT) with ±10 ppm/°C temperature coefficient, which can be directly connected to VREF IN for standard operation. An external reference may be applied only if tighter accuracy, improved temperature stability, or adjustable gain (±10%) is required; doing so disables the internal reference output.

How does the power-down mode affect digital output behavior in the AD9057BRS-40?

When PWRDN is driven high, the AD9057BRS-40 enters power-down mode within 200 ns, reducing total power dissipation to <10 mW. During this state, all digital outputs (D0–D7) transition to high-impedance, preventing bus contention. The internal 2.5 V reference remains active to minimize wake-up latency; valid output data resumes three encode cycles after PWRDN returns low.

Can the AD9057BRS-40 interface directly with a 3 V FPGA I/O bank?

Yes-the AD9057BRS-40 supports 3 V digital logic via the VDD pin (Pin 15). When VDD = 3 V, digital outputs swing from 0.05 V to 2.95 V, meeting standard 3 V CMOS input thresholds. The ENCODE and PWRDN inputs are TTL/CMOS-compatible with 1.5 V switching thresholds, ensuring reliable interfacing without level shifters.

What is the significance of offset binary coding in the AD9057BRS-40 digital output format?

Offset binary coding maps analog input voltages linearly to digital words: 00000000 = 2.0 V (negative full scale), 10000000 = 2.5 V (midscale), and 11111111 = 3.0 V (positive full scale). This format simplifies interface with DSPs and FPGAs performing real-time signal processing, as it avoids two's complement sign extension and enables direct arithmetic operations on digitized video or IF data without format conversion.