Rainbow Electronics MAX5176 - Manual (Page 9)

MAX5174/MAX5176
Low-Power, Serial, 12-Bit DACs
with Voltage Output
_______________________________________________________________________________________ 9
Typical Operating Characteristics (continued)
(MAX5174: V
DD
= +5V, V
REF
= 2.5V; MAX5176: V
DD
= +3V, V
REF
= +1.25V; C
L
= 100pF, OS = AGND, code = FFF hex,
T A = +25°C, unless otherwise noted.)
SCLK
2V/div
OUT
500 µ V/div
2 µ s/div
DIGITAL FEEDTHROUGH (SCLK, OUT)
MAX5174/6 toc26
AC-COUPLED
-30
-15
-20
-25
-5
-10
0
5
0 1000 1500 500 2000 2500 3000
REFERENCE INPUT
FREQUENCY RESPONSE
MAX5174/6toc27
FREQUENCY (kHz)
GAIN (dB)
V REF = 0.67Vp-p + 0.75V DC
50ms/div
START-UP GLITCH
V OUT
10mV/div
AC-COUPLED
MAX5174/6 toc28
V DD
1V/div
MAX5176
Pin Description
Voltage Output. High impedance when in shutdown. The output voltage is limited to V DD . OUT 2
Power-Down Lockout. (digital input). Connect to V DD to allow shutdown. Connect to DGND to disable
software and hardware shutdown.
PDL 4
Reset Mode Select (digital input). Connect to V DD to select midscale reset output voltage. Connect to
DGND to select 0 reset output voltage.
RS 3
Chip-Select Input (digital input). DIN ignored when CS is high. CS 6
Serial Clock Input (digital input). SCLK 8
Serial-Data Input (digital input). Data is clocked in on the rising edge of SCLK. DIN 7
Clear DAC. (digital input) Clears the DAC to either zero or midscale as determined by RS. CLR 5
Serial-Data Output DOUT 10
Shutdown (digital input). Pulling SHDN high when PDL = V DD places the chip in shutdown with a maximum
shutdown current of 10µA.
SHDN 12
User-Programmable Output. State is set by the serial input. UPO 11
Reference Input. Maximum V
REF
is V
DD
- 1.4V. REF 14
PIN
Positive Supply. Bypass to AGND with a 4.7µF capacitor in parallel with a 0.1µF capacitor. V DD 16
Offset Adjustment. Connect to AGND for no offset. OS 1
FUNCTION NAME
No Connection N.C. 15
Analog Ground AGND 13
Digital Ground DGND 9