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DAC3482IZAY データシート(PDF) 7 Page - Texas Instruments |
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DAC3482IZAY データシート(HTML) 7 Page - Texas Instruments |
7 / 87 page DAC3482 www.ti.com SLAS748D – MARCH 2011 – REVISED AUGUST 2012 PIN FUNCTIONS PIN I/O DESCRIPTION NAME NO. D10, E11, F11, AVDD G11, H11, J11, I Analog supply voltage. (3.3 V) K11, L10 CMOS output for ALARM condition. The ALARM output functionality is defined through the config7 ALARM N12 O register. Default polarity is active low, but can be changed to active high via config0 alarm_out_pol control bit. Full-scale output current bias. For 30mA full-scale output current, connect 1.28k Ω to ground. BIASJ H12 O Change the full-scale output current through coarse_dac(3:0) in config3, bit<15:12> Internal clock buffer supply voltage. (1.2 V) CLKVDD C12 I It is recommended to isolate this supply from DIGVDD and DACVDD. LVDS positive input data bits 0 through 15. Internal 100 Ω termination resistor. Data format relative N4, N3, N2, to DATACLKP/N clock is Double Data Rate (DDR). N1, M2, L2, D15P is most significant data bit (MSB) D[15..0]P K2, J2, F2, E2, I D2, C2, A1, D0P is least significant data bit (LSB) A2, A3, A4 The order of the bus can be reversed via config2 revbus bit. P4, P3, P2, P1, M1, L1, D[15..0]N K1, J1, F1, E1, I LVDS negative input data bits 0 through 15. (See D[15:0]P description above) D1, C1, B1, B2, B3, B4 DACCLKP A12 I Positive external LVPECL clock input for DAC core with a self-bias. DACCLKN A11 I Complementary external LVPECL clock input for DAC core. (see the DACCLKP description) D9, E9, E10, F10, G10, DAC core supply voltage. (1.2 V). It is recommended to isolate this supply from CLKVDD and DACVDD I H10, J10, K9, DIGVDD. K10, L9 LVDS positive input data clock. Internal 100 Ω termination resistor. Input data D[15:0]P/N is latched DATACLKP G2 I on both edges of DATACLKP/N (Double Data Rate). DATACLKN G1 I LVDS negative input data clock. (See DATACLKP description) E5, E6, E7, Digital supply voltage. (1.2 V). It is recommended to isolate this supply from CLKVDD and DIGVDD F5, J5, K5, K6, I DACVDD. K7 Used as external reference input when internal reference is disabled through config27 extref_ena = EXTIO G12 I/O ‘1’. Used as internal reference output when config27 extref_ena = ‘0’ (default). Requires a 0.1 μF decoupling capacitor to AGND when used as reference output. LVDS frame indicator positive input. Internal 100 Ω termination resistor. The main functions of this input are to reset the FIFO pointer or to be used as a syncing source. These two functions are captured with the rising edge of DATACLKP/N. The signal captured by the FRAMEP H2 I falling edge of DATACLKP/N can be used as a block parity bit. The FRAMEP/N signal should be edge-aligned with D[15:0]P/N. Additionally it is used to indicate the beginning of the frame. FRAMEN H1 I LVDS frame indicator negative input. (See the FRAMEP description) Copyright © 2011–2012, Texas Instruments Incorporated 7 |
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