ML2330ES-3 Просмотр технического описания (PDF) - Micro Linear Corporation

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производитель

ML2330ES-3

Selectable Dual 3V/3.3V/5V 8-Bit DACs

Micro Linear Corporation 

ML2330

VOLTAGE REFERENCE

A bandgap voltage reference is incorporated on the

ML2330. It is trimmed for zero temperature coefficient at

25°C to minimize output voltage drift over the specified

operating temperature range.

OUTPUT BUFFER AND GAIN SETTING

The output buffer converts the DAC output current to a

voltage output using a resistive network. The outputs can

swing from GND +0.02V to either 2.02V (3V) or 4.02V

(5V). The DAC transfer function is:

VOUT

=

K

× DATA

256

+ 0.02

where K = 2 if VCC = 3V and K = 4 if VCC = 5V

In the 3V operation, the amplifier outputs will settle to

1/2LSB in 10µs when loads are greater than 1ký (2ký for

5V operation) and capacitive loads smaller than 100pF.

GAIN ERROR

The graph below shows how gain error varies with

temperature when VCC = 3.3V.

POWER DOWN MODE

There are three power-down modes in the ML2330. By

clearing the control bits P1-P0 (Table 3.2), the entire chip

will be powered down with a supply current less than

5µA. Individual DACs can also be powered down to save

power (1.75mA per DAC).

0.4

0.3

0.2

0.1

–0.0

–0.1

–0.2

–0.3

–0.4

–0.5

–0.6

–0.7

–0.8

–0.9

–1.0

–40

Gain Error vs Temperature

–20

0

20

40

60

TEMPERATURE ( C)

80

100

6

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