ML2330
VOLTAGE REFERENCE
POWER DOWN MODE
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.
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).
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:
K ×DATA
V
=
+ 0.02
OUT
256
where K = 2 if V = 3V and K = 4 if V = 5V
CC
CC
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 V = 3.3V.
CC
Gain Error vs Temperature
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
–20
0
20
40
60
80
100
TEMPERATURE ( C)
6
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
