MAX5122 Maxim, MAX5122 Datasheet - Page 9

• Manufacturer Part Number: MAX5122
• Description: +5V/+3V / 12-Bit / Serial / Force/Sense DACs with 10ppm/C Internal Reference
• Manufacturer: Maxim

PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
REFADJ
RSTVAL
NAME
DGND
AGND
DOUT
SCLK
OUT
UPO
CLR
PDL
REF
V
DIN
FB
CS
PD
DD
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
_______________________________________________________________________________________
Amplifier Inverting Sense Input (Analog Input)
Analog Output Voltage. High impedance if part is in shutdown.
Reset Value Input (Digital Input).
1: Connect to V
0: Connect to DGND to select 0V as the output reset value.
Power-Down Lockout (Digital Input).
1: Normal operation.
0: Disallows shutdown (device cannot be powered down).
Reset DAC Input (Digital Input). Clears the DAC to its predetermined (RSTVAL) output state. Clearing the
DAC will cause it to exit a software shutdown state.
Active-Low Chip-Select Input (Digital Input)
Serial Data Input. Data is clocked in on the rising edge of SCLK.
Serial Clock Input
Digital Ground
Serial Data Output
User-Programmable Output (Digital Output)
Power-Down Input (Digital Input). Pulling PD high when PDL = V
mum shutdown current of 20µA.
Analog Ground
Buffered Reference Output/Input. In internal reference mode, the reference buffer provides a +2.5V
(MAX5122) or +1.25V (MAX5123) nominal output, externally adjustable at REFADJ. In external reference
mode, disable the internal reference by pulling REFADJ to V
Analog Reference Adjust Input. Bypass with a 33nF capacitor to AGND. Connect to V
external reference.
Positive Power Supply. Bypass with a 0.1µF capacitor in parallel with a 4.7µF capacitor to AGND.
DD
with 10ppm/°C Internal Reference
to select midscale as the output reset value.
FUNCTION
DD
and applying the external reference to REF.
DD
places the IC into shutdown with a maxi-
Pin Description
DD
when using an
9