The ADS808 is a high-dynamic range, 12-bit, 70MHz, pipelined Analog-to-Digital Converter (ADC). It includes a high-bandwidth linear track-and-hold that has a low jitter of only 0.25ps rms, leading to excellent SNR performance. The clock input can accept a low-level differential sine wave or square wave signal down to 0.5Vp-p, further improving the SNR performance. It also accepts a single-ended clock signal and has flexible threshold levels.
The ADS808 has a 2Vp-p differential input range (1Vp-p 2 inputs) for optimum signal-to-noise ratio. The differential operation gives the lowest even-order harmonic components. A lower input voltage of 1.5Vp-p or 1Vp-p can also be selected using the internal references, further optimizing SFDR. Alternatively, a single-ended input range can be used by tying the IN\ input to the common-mode voltage, if desired.
The ADS808 also provides an over-range flag that indicates when the input signal has exceeded the converters full-scale range. This flag can also be used to reduce the gain of the front-end signal conditioning circuitry. It also employs digital error-correction techniques to provide excellent differential linearity for demanding imaging applications. The ADS808 is available in a small TQFP-48 PowerPAD thermally enhanced package.
PowerPAD is a registered trademark of Texas Instruments.
|Sample Rate (Max) (MSPS)|
|# Input Channels|
|Power Consumption (Typ) (mW)|
|Input Range (Vp-p)|
|Operating Temperature Range (C)|
|Analog Input BW (MHz)|
|Package Size: mm2:W x L (PKG)|
|DNL (Typ) (+/-LSB)|
|INL (Typ) (+/-LSB)|
|-40 to 85|
|48HTQFP: 81 mm2: 9 x 9(HTQFP)|