| Part Numbert | Mfg | Packt | D/C | Descriptiont | Qty | Company/Contact |
SXK1073681R1A Datasheet
SXK1073681R1A Price If none of the EPROM lock bits are set, and the device's encryption vector is blank (that is, all l's), then the data output from the device during a read operation is precisely the data stored in its EPROM. However if a value other than all l's is stored in the device's encryption vector, the device will perform encryption on the data as it is read out. This encryption process is the normal security measure offered by the encryption vector. It should be noted that if a read is performed after the encryption vector is written, the programmer's buffer memory will be overwritten with encrypted data. This is typically not the desired result. SXK1073681R1A on stock The architecture of the DAC2902 uses the current steering technique to enable fast switching and a high update rate. The core element within the monolithic DAC is an array of segmented current sources that are designed to deliver a full- scale output current ofup t0 20mA, as shown in Figure l. An internal decoder addresses the differential current switches each time the DAC is updated and a corresponding output current is formed by steering all currents to either output summing node, Iour or Iou-r. The complementary outputs deliver a differential output signal, which improves the dynamic performance through reduction of even-order har- monics, common-mode signals (noise), and double the peak- to-peak output signal swing by a factor oftwo, compared to single-ended operation. The segmented architecture results in a significant reduction of the glitch energy, improves the dynamic performance (SFDR), and DNL. The current outputs maintain a very high output impedance of greater than 200ky. The full-scale output current is determined by the ratio of the internal reference voltage (approx. +1.25V) and an external resistor, RSEr. The resulting IREF iS internally multiplied by a factor of 32 to produce an effective DAC output current that can range from 2mA t0 20mA, depending on the value of RSE r The DAC2902 is split into a digital and an analog portion, each of which is powered through its own supply pin. The digital section includes edge-triggered input latches and the decoder logic, while the analog section comprises the cur- rent source array with its associated switches, and the reference circuitry. DESCRIPTION OF EXTERNAL SYNCHRONOUS SHUT TER MODE i When EXMD = H, this mode is given priority over other modes. On applying falling edge of trigger input to EXST (pin 11), the lC reads at the rising edge of HDI and latches the V period counter value, and controls final output of the OFDX pulse during this H period. (The pulse must lasts until HDI goes high.) 2. Once latched, the value of V period counter is re- tained until the next trigger is input as long as EXMD = H, even trigger input is for odd (ODD)or even (EVEN) field, the storage time of another field becomes the same as the field with trigger input automatically. |
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