AD9280

Features:

CMOS 8-Bit 32 MSPS Sampling A/D Converter
Pin-Compatible with AD876-8
Power Dissipation: 95 mW (3 V Supply)
Operation Between +2.7 V and +5.5 V Supply
Differential Nonlinearity: 0.2 LSB
Power-Down (Sleep) Mode
Three-State Outputs
Out-of-Range Indicator
Built-In Clamp Function (DC Restore)
Adjustable On-Chip Voltage Reference
IF Undersampling to 135 MHz




Pinout








Specifications

Parameter	With Respect to	Min	Max	Units
AVDD	AVSS	0.3	+6.5	V
DRVDD	DRVSS	0.3	+6.5	V
AVSS	DRVSS	0.3	+0.3	V
AVDD	DRVDD	6.5	+6.5	V
MODE	AVSS	0.3	AVDD + 0.3	V
CLK	AVSS	0.3	AVDD + 0.3	V
Digital Outputs	DRVSS	0.3	DRVDD + 0.3	V
AIN	AVSS	0.3	AVDD + 0.3	V
VREF	AVSS	0.3	AVDD + 0.3	V
REFSENSE	AVSS	0.3	AVDD + 0.3	V
REFTF, REFTB	AVSS	0.3	AVDD + 0.3	V
REFTS, REFBS	AVSS	0.3	AVDD + 0.3	V
Junction Temperature			+150	°C
Storage Temperature		65	+150	°C
Lead Temperature 10 sec			+300	°C

Description

The AD9280 is a monolithic, single supply, 8-bit, 32 MSPS analog-to-digital converter with an on-chip sample-and-hold amplifier and voltage reference. The AD9280 uses a multistage differential pipeline architecture at 32 MSPS data rates and guarantees no missing codes over the full operating temperature range.

The input of the AD9280 has been designed to ease the development of both imaging and communications systems. The user can select a variety of input ranges and offsets and can drive the input either single-ended or differentially.

The sample-and-hold amplifier (SHA) is equally suited for both multiplexed systems that switch full-scale voltage levels in successive channels and sampling single-channel inputs at frequencies up to and beyond the Nyquist rate. AC-coupled input signals can be shifted to a predetermined level, with an onboard clamp circuit. The dynamic performance is excellent.

The AD9280 has an onboard programmable reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application.

A single clock input is used to control all internal conversion cycles. The digital output data is presented in straight binary output format. An out-of-range signal (OTR) indicates an overflow condition which can be used with the most significant bit to determine low or high overflow.

The AD9280 can operate with a supply range from +2.7 V to +5.5 V, ideally suiting it for low power operation in high speed applications.

The AD9280 is specified over the industrial (40°C to +85°C) temperature range.