AD9255 Series

14-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Analog-to-Digital Converter

Catalog

14-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Analog-to-Digital Converter

Part	Data Interface	Number of Bits	Utilized IC / Part	Power (Typ) @ Conditions	Number of A/D Converters	Input Range [Min]	Input Range [Max]	Supplied Contents	Sampling Rate (Per Second)	Operating Temperature [Max]	Operating Temperature [Min]	Input Type	Supplier Device Package	Configuration	Number of Inputs	Package / Case	Architecture	Ratio - S/H:ADC	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Mounting Type	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Reference Type
Analog Devices AD9255-80EBZ	SPI	14	AD9255	239 mW	1	1 Vpp	2 Vpp	Board(s)	80 M
Analog Devices AD9255-105EBZ	SPI	14	AD9255	371 mW	1	1 Vpp	2 Vpp	Board(s)	105 M
Analog Devices AD9255BCPZRL7-80	LVDS - Parallel	14			1				80 M	85 °C	-40 °C	Differential	48-LFCSP-VQ (7x7)	S/H-ADC	1	48-VFQFN Exposed Pad CSP	Pipelined	1:1	1.9 V	1.7 V	Surface Mount	1.7 V	1.9 V	External Internal
Analog Devices AD9255-125EBZ	SPI	14	AD9255	321 mW	1	1 Vpp	2 Vpp	Board(s)	125 M
Analog Devices AD9255BCPZ-80	LVDS - Parallel	14			1				80 M	85 °C	-40 °C	Differential	48-LFCSP-VQ (7x7)	S/H-ADC	1	48-VFQFN Exposed Pad CSP	Pipelined	1:1	1.9 V	1.7 V	Surface Mount	1.7 V	1.9 V	External Internal
Analog Devices AD9255BCPZ-105	LVDS - Parallel	14			1				105 M	85 °C	-40 °C	Differential	48-LFCSP-VQ (7x7)	S/H-ADC	1	48-VFQFN Exposed Pad CSP	Pipelined	1:1	1.9 V	1.7 V	Surface Mount	1.7 V	1.9 V	External Internal

Catalog

14-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Analog-to-Digital Converter

Key Features

• SNR = 78.3 dBFS @ 70 MHz and 125 MSPS

• SFDR = 93 dBc @ 70 MHz and 125 MSPS

• Low power: 371 mW @ 125 MSPS

• 1.8 V analog supply operation

• 1.8 V CMOS or LVDS output supply

• Integer 1-to-8 input clock divider

• IF sampling frequencies to 300 MHz

• −153.4 dBm/Hz small signal input noise with 200 Ω input impedance @ 70 MHz and 125 MSPS

• Optional on-chip dither

• Programmable internal ADC voltage reference

• Integrated ADC sample-and-hold inputs

• See data sheet for additional features

Description

The AD9255 is a 14-bit, 125 MSPS analog-to-digital converter (ADC). The AD9255 is designed to support communications applications where high performance combined with low cost, small size, and versatility is desired.The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic to provide 14-bit accuracy at 125 MSPS data rates and guarantees no missing codes over the full operating temperature range.The ADC features a wide bandwidth differential sample-and-hold analog input amplifier supporting a variety of user-selectable input ranges. It is suitable for multiplexed systems that switch full-scale voltage levels in successive channels and for sampling single-channel inputs at frequencies well beyond the Nyquist rate. Combined with power and cost savings over previously available ADCs, the AD9255 is suitable for applications in communications, instrumentation, and medical imaging.A differential clock input controls all internal conversion cycles. A duty cycle stabilizer provides the means to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance over a wide range of input clock duty cycles. An integrated voltage reference eases design considerations.The ADC output data format is either parallel 1.8 V CMOS or LVDS (DDR). A data output clock is provided to ensure proper latch timing with receiving logic.Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface. Flexible power-down options allow significant power savings, when desired. An optional on-chip dither function is available to improve SFDR performance with low power analog input signals.The AD9255 is available in a Pb-free, 48-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.PRODUCT HIGHLIGHTSOn-chip dither option for improved SFDR performance with low power analog input.Proprietary differential input that maintains excellent SNR performance for input frequencies up to 300 MHz.Operation from a single 1.8 V supply and a separate digital output driver supply accommodating 1.8 V CMOS or LVDS outputs.Standard serial port interface (SPI) that supports various product features and functions, such as data formatting (offset binary, twos complement, or gray coding), enabling the clock DCS, power-down, test modes, and voltage reference mode.Pin compatibility with the AD9265, allowing a simple migration up to 16 bits.ApplicationsCommunicationsMultimode digital receivers (3G)GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMASmart antenna systemsGeneral-purpose software radiosBroadband data applicationsUltrasound equipment