MAX5893EGK+D【PDF 2/32 页】IC DAC 12BIT DUAL 500MSPS 68-QFN

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MAX5893

12-Bit, 500Msps Interpolating and Modulating

Dual DAC with CMOS Inputs

______________________________________________________________________________________

Pin Description

PIN

NAME

FUNCTION

CLKP

Noninverting Differential Clock Input

CLKN

Inverting Differential Clock Input

3, 4, 5, 22–25,

40–43

N.C.

Internally Connected. Do not connect.

6, 21, 30, 37

DVDD1.8

Digital Power Supply. Accepts a 1.71V to 1.89V supply range. Bypass each pin to ground with a

0.1F capacitor as close to the pin as possible.

7–12, 15–20

A11–A0

A-Port Data Inputs.

Dual-port mode:

I-channel data input. Data is latched on the rising/falling edge (programmable) of the DATACLK.

Single-port mode:

I-channel and Q-channel data input, with SELIQ.

13, 44

DVDD3.3

CMOS I/O Power Supply. Accepts a 3.0V to 3.6V supply range. Bypass each pin to ground with a

0.1F capacitor as close to the pin as possible.

DATACLK

Programmable Data Clock Input/Output. See the DATACLK Modes section for details.

SELIQ/B11

Select I/Q-Channel Input or B-Port MSB Input.

Single-port mode:

If SELIQ = LOW, data is latched into Q-channel on the rising/falling edge (programmable) of

the DATACLK.

If SELIQ = HIGH, data is latched into I-channel on the rising/falling edge (programmable) of the

DATACLK.

Dual-port mode:

Q-channel MSB input.

DATACLK/B10

Alternate DATACLK Input/Output or B-Port Bit 10 Input.

Single-port mode:

See the DATACLK Modes section for details.

Dual-port mode:

Q-channel bit 10 input.

If unused connect to GND.

28, 29, 31–36,

38, 39

B9–B0

B-Port Data Bits 9–0.

Dual-port mode:

Q-channel inputs. Data is latched on the rising/falling (programmable) edge of the DATACLK.

Single-port mode:

Connect to GND.

SDO

Serial-Port Data Output

SDI

Serial-Port Data Input

SCLK

Serial-Port Clock Input. Data on SDI is latched on the rising edge of SCLK.

Serial-Port Interface Select. Drive CS low to enable serial-port interface.

RESET

Reset Input. Set RESET low during power-up.

REFIO

Reference Input/Output. Bypass to ground with a 1F capacitor as close to the pin as possible.

DACREF

Current-Set Resistor Return Path. For a 20mA full-scale output current, connect a 2k

resistor between

FSADJ and DACREF. Internally connected to GND. Do not use as an external ground connection.

FSADJ

Full-Scale Adjust Input. This input sets the full-scale output current of the DAC. For a 20mA full-

scale output current, connect a 2k

resistor between FSADJ and DACREF.

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