MAX1112 Maxim, MAX1112 Datasheet - Page 7

• Manufacturer Part Number: MAX1112
• Description: +5V / Low-Power / Multi-Channel / Serial 8-Bit ADCs
• Manufacturer: Maxim

Figure 1. Load Circuits for Enable Time
MAX1112
DOUT
1–4
5–8
10
11
12
13
14
15
16
17
18
19
20
a) High-Z to V
9
3k
PIN
MAX1113
OH
DGND
and V
1–4
10
11
12
13
14
15
16
—
5
6
7
8
9
_______________________________________________________________________________________
OL
to V
OH
C
CH0–CH3
CH4–CH7
LOAD
REFOUT
SSTRB
NAME
DGND
REFIN
AGND
SHDN
DOUT
SCLK
COM
V
DIN
CS
DD
b) High-Z to V
DOUT
Sampling Analog Inputs
Sampling Analog Inputs
Ground Reference for Analog Inputs. Sets zero-code voltage in single-ended mode.
Must be stable to ±0.5LSB.
Three-Level Shutdown Input. Normally floats. Pulling SHDN low shuts the MAX1112/
MAX1113 down to 10µA (max) supply current; otherwise, the devices are fully opera-
tional. Pulling SHDN high shuts down the internal reference.
Reference Voltage Input for Analog-to-Digital Conversion. Connect to REFOUT to use
the internal reference.
Internal Reference Generator Output. Bypass with a 1µF capacitor to AGND.
Analog Ground
Digital Ground
Serial-Data Output. Data is clocked out on SCLK’s falling edge. High impedance when
CS is high.
Serial-Strobe Output. In internal clock mode, SSTRB goes low when the MAX1112/
MAX1113 begin the A/D conversion and goes high when the conversion is complete.
In external clock mode, SSTRB pulses high for two clock periods before the MSB is
shifted out. High impedance when CS is high (external clock mode only).
Serial-Data Input. Data is clocked in at SCLK’s rising edge.
Active-Low Chip Select. Data is not clocked into DIN unless CS is low. When CS is
high, DOUT is high impedance.
Serial-Clock Input. Clocks data in and out of serial interface. In external clock mode,
SCLK also sets the conversion speed (duty cycle must be 45% to 55%).
Positive Supply Voltage, +4.5V to +5.5V
+5V
+5V, Low-Power, Multi-Channel,
OL
and V
3k
C
DGND
LOAD
OH
to V
OL
Figure 2. Load Circuits for Disable Time
DOUT
3k
FUNCTION
a) V
Serial 8-Bit ADCs
DGND
OH
to High-Z
C
LOAD
Pin Description
DOUT
b) V
OL
+5V
to High-Z
3k
C
DGND
LOAD
7