AD9684 14-Bit, 500 MSPS LVDS, Dual Analog-to-Digital Converter

The AD9684 is a dual, 14-bit, 500 MSPS ADC. The device has an on-chip buffer and a sample-and-hold circuit designed for low power, small size, and ease of use. This product is designed for sampling wide bandwidth analog signals. The AD9684 is optimized for wide input bandwidth, a high sampling rate, excellent linearity, and low power in a small package.

The dual ADC cores feature a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth buffered inputs, supporting a variety of user selectable input ranges. An integrated voltage reference eases design considerations. Each ADC data output is internally connected to an optional decimate by 2 block.

The analog input and clock signals are differential inputs. Each ADC data output is internally connected to two digital downconverters (DDCs). Each DDC consists of four cascaded signal processing stages: a 12-bit frequency translator (NCO), and three half-band decimation filters supporting a divide by factor of two, four, and eight.

Applications

Communications
Diversity multi-band, multi-mode digital receivers 3G/4G, TD-SCDMA, WCDMA, MC-GSM, LTE
General-purpose software radios
Ultrawideband satellite receiver
Instrumentation (spectrum analyzers, network analyzers, integrated RF test solutions)
Radar
Digital oscilloscopes
High speed data acquisition systems
DOCSIS CMTS upstream receive paths
HFC digital reverse path receivers

Features and Benefits

LVDS digital outputs

1.1 W total power per channel at 500MSPS (default settings)

SFDR = 85 dBc at 170MHz fIN (500MSPS)

SNR = 68.6 dBFS at 170MHz fIN (500MSPS)

ENOB = 10.9 bits at 170 MHz fIN

DNL = ±0.5 LSB

INL = ±2.5 LSB

Noise Density = -153 dBFS/Hz at 500 MSPS

1.25V, 2.50 V and 3.3V supply operation

No missing codes

Internal analog-to-digital converter (ADC) voltage reference

See data sheet for additional features

Analog to Digital Converters

High Speed ADC > 10MSPS

Data Sheets

Document	note
AD9684: 14-Bit, 500 MSPS LVDS, Dual Analog-to-Digital Converter (Rev. 0)	PDF 1.25 M

Application Notes

Document	note
AN-1386: The Effects of the Sample Clock Spectrum on Measured Signal Spectrum in ADCs, a Simple Mathematical Description (Rev. 0)	PDF 241.13 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD9684BBPZ-500 Production	196 ball (12x12x1.38 w/7.5mm EP)	OTH 189	-40 to 85C	320	272	Y
AD9684BBPZRL7-500 Production	196 ball (12x12x1.38 w/7.5mm EP)	REEL 500	-40 to 85C	320	272	Y

Evaluation Boards

Part Number	Description	Price	RoHS
AD9684-500EBZ	Evaluation Board	795	Y

AD9684: 14-Bit, 500 MSPS LVDS, Dual Analog-to-Digital Converter (Rev. 0) ad9684

AN-1386: The Effects of the Sample Clock Spectrum on Measured Signal Spectrum in ADCs, a Simple Mathematical Description (Rev. 0 ad9684