AD9281ARSZRL

Product Summary

The AD9281ARSZRL is a complete dual channel, 28 MSPS, 8-bit CMOS ADC. The AD9281ARSZRL is optimized specifically for applications where close matching between two ADCs is required (e.g.,I/Q channels in communications applications). The 28 MHz sampling rate and wide input bandwidth will cover both narrowband and spread-spectrum channels. The AD9281ARSZRL integrates two 8-bit, 28 MSPS ADCs, two input buffer amplifiers, an internal voltage reference and multiplexed digital output buffers. Each ADC incorporates a simultaneous sampling sample-andhold amplifier at its input. The analog inputs are buffered; no external input buffer op amp will be required in most applications. The ADCs are implemented using a multistage pipeline architecture that offers accurate performance and guarantees no missing codes. The outputs of the ADCs are ported to a multiplexed digital output buffer. The AD9281ARSZRL is manufactured on an advanced low cost CMOS process, operates from a single supply from 2.7 V to 5.5 V, and consumes 225 mW of power (on 3 V supply). The AD9281ARSZRL input structure accepts either single-ended or differential signals, providing excellent dynamic performance up to and beyond 14 MHz Nyquist input frequencies.

Parametrics

AD9281ARSZRL absolute maximum ratings: (1)AVDD AVSS: –0.3 +6.5 V; (2)DRVDD DRVSS: –0.3 +6.5 V; (3)AVSS DRVSS: –0.3 +0.3 V; (4)AVDD DRVDD: –6.5 +6.5 V; (5)MODE AVSS: –0.3 AVDD + 0.3 V; (6)CLK AVSS: –0.3 AVDD + 0.3 V; (7)Digital Outputs DRVSS: –0.3 DRVDD + 0.3 V; (8)AIN AVSS: –0.3 AVDD + 0.3 V; (9)VREF AVSS: –0.3 AVDD + 0.3 V; (10)REFSENSE AVSS: –0.3 AVDD + 0.3 V; (11)REFTF, REFTB AVSS: –0.3 AVDD + 0.3 V; (12)REFTS, REFBS AVSS: –0.3 AVDD + 0.3 V; (13)Junction Temperature: +150°C; (14)Storage Temperature: –65 +150°C; (15)Lead Temperature 10 sec: +300°C.

Features

AD9281ARSZRL features: (1)Complete Dual Matching ADC; (2)Low Power Dissipation: 225 mW (+3 V Supply); (3)Single Supply: 2.7 V to 5.5 V; (4)Differential Nonlinearity Error: 0.1 LSB; (5)On-Chip Analog Input Buffers; (6)On-Chip Reference; (7)Signal-to-Noise Ratio: 49.2 dB; (8)Over Seven Effective Bits; (9)Spurious-Free Dynamic Range: –65 dB; (10)No Missing Codes Guaranteed; (11)28-Lead SSOP.

Diagrams