Datasheet

MAX5175/MAX5177
Low-Power, Serial, 12-Bit DACs with
Force/Sense Voltage Output
_______________________________________________________________________________________ 9
Pin Description
Typical Operating Characteristics (continued)
(MAX5175: V
DD
= +5V, V
REF
= 2.5V; MAX5177: V
DD
= +3V, V
REF
= 1.25V; C
L
= 100pF, FB = OUT, code = FFF hex, T
A
= +25°C,
unless otherwise noted.)
V
OUT
(10mV/div)
AC-COUPLED
V
DD
(1V/div)
50ms/div
START-UP GLITCH
MAX5175-28
PIN
Feedback Input FB1
FUNCTIONNAME
Voltage Output. High impedance in shutdown. Output voltage is limited to V
DD
.OUT2
Power-Down Lockout (digital input). Connect to V
DD
to allow shutdown. Connect to DGND to disable shut-
down.
PDL
4
Reset Mode Select (digital input). Connect to V
DD
to select midscale reset output value. Connect to DGND
to select 0 reset output value.
RS3
Chip-Select Input (digital input). DIN is ignored when CS is high.CS
6
Serial Clock Input (digital input)SCLK8
Serial-Data Input (digital input). Data is clocked in on the rising edge of SCLK.DIN7
Clear DAC (digital input). Clears the DAC to its predetermined output state as set by RS.
CLR
5
Serial-Data OutputDOUT10
Shutdown (digital input). Pulling SHDN high when PDL = V
DD
places the chip in shutdown with a maximum
shutdown current of 10µA.
SHDN12
User-Programmable Output. State is set by the serial input.UPO11
Reference Input. Maximum V
REF
is V
DD
- 1.4V.REF14
Positive Supply. Bypass to AGND with a 4.7µF capacitor in parallel with a 0.1µF capacitor.V
DD
16
No ConnectN.C.15
Analog GroundAGND13
Digital GroundDGND9
-25
-20
-10
-15
-5
0
0 1000500 1500 2000 2500 3000
REFERENCE INPUT FREQUENCY RESPONSE
MAX5175-27
FREQUENCY (kHz)
GAIN (dB)
V
REF
= 0.67Vp-p + 1.25V
DC
MAX5177