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ADC12D1600 Datasheet(PDF) 5 Page - Texas Instruments |
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ADC12D1600 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 73 page  VA VA GND GND Tdiode_P Tdiode_N GND VA V GND VA V VA GND GND VA 200k 8 pF VCMO Enable AC Coupling ADC12D1000, ADC12D1600 www.ti.com SNAS480M – MAY 2010 – REVISED MARCH 2013 Table 1. Analog Front-End and Clock Balls (continued) Ball No. Name Equivalent Circuit Description Common Mode Voltage Output or Signal Coupling Select. If AC-coupled operation at the analog inputs is desired, this pin should be held at logic- low level. This pin is capable of sourcing/ sinking up to 100 µA. For DC-coupled operation, this pin C2 VCMO should be left floating or terminated into high- impedance. In DC-coupled Mode, this pin provides an output voltage which is the optimal common- mode voltage for the input signal and should be used to set the common-mode voltage of the driving buffer. Bandgap Voltage Output or LVDS Common-mode Voltage Select. This pin provides a buffered version of the bandgap output voltage and is capable of sourcing/sinking 100 uA and driving a B1 VBG load of up to 80 pF. Alternately, this pin may be used to select the LVDS digital output common- mode voltage. If tied to logic-high, the 1.2V LVDS common-mode voltage is selected; 0.8V is the default. External Reference Resistor terminals. A 3.3 k Ω ±0.1% resistor should be connected between Rext+/-. The Rext resistor is used as a reference C3/D3 Rext+/- to trim internal circuits which affect the linearity of the converter; the value and precision of this resistor should not be compromised. Input Termination Trim Resistor terminals. A 3.3 k Ω ±0.1% resistor should be connected between Rtrim+/-. The Rtrim resistor is used to establish the calibrated 100 Ω input impedance of VinI, VinQ C1/D2 Rtrim+/- and CLK. These impedances may be fine tuned by varying the value of the resistor by a corresponding percentage; however, the tuning range and performance is not ensured for such an alternate value. Temperature Sensor Diode Positive (Anode) and Negative (Cathode) Terminals. This set of pins is E2/F3 Tdiode+/- used for die temperature measurements. It has not been fully characterized. Copyright © 2010–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: ADC12D1000 ADC12D1600 |
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