MAX1284 Maxim, MAX1284 Datasheet - Page 7

• Manufacturer Part Number: MAX1284
• Description: 400ksps/300ksps / Single-Supply / Low-Power / Serial 12-Bit ADCs with Internal Reference
• Manufacturer: Maxim

(MAX1284: V
T
A
= +25°C, unless otherwise noted.)
PIN
1
2
3
4
5
6
7
8
400ksps/300ksps, Single-Supply, Low-Power,
3.00
2.75
2.50
2.25
2.00
1.75
1.50
DD
Serial 12-Bit ADCs with Internal Reference
2.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
= +5.0V, f
CODE = 1111 1111 1111
R
C
NAME
SHDN
DOUT
SCLK
L
L
GND
V
REF
AIN
=
CS
= 10pF
_______________________________________________________________________________________
DD
3.0
SUPPLY VOLTAGE (V)
3.5
STATIC
SCLK
CONVERTING
SCLK = 4.8MHz
Positive Supply Voltage
Sampling Analog Input, 0 to V
Active-Low Shutdown Input. Pulling SHDN low shuts down the device and reduces the supply current
to 2µA (typ).
Reference Voltage for Analog-to-Digital Conversion. Internal 2.5V reference output. Bypass with 4.7µF
capacitor.
Analog and Digital Ground
Serial Data Output DOUT changes state at SCLK’s rising edge High impedance when CS is high.
Active-Low Chip Select. Initiates conversions on the falling edge. When CS is high, DOUT is high
impedance.
Serial Clock Input. SCLK drives the conversion process and clocks data out at rates up to 6.4MHz
(MAX1284) or 4.8MHz (MAX1285).
4.0
= 6.4MHz, MAX1285: V
CONVERTING
SCLK = 6.4MHz
4.5
5.0
Typical Operating Characteristics (continued)
5.5
DD
REF
= +3.0V, f
range
SCLK
FUNCTION
= 4.8MHz; C
3.0
2.7
2.4
2.1
1.8
1.5
-40
SUPPLY CURRENT vs. TEMPERATURE
V
V
V
DD
DD
DD
-20
LOAD
= 3V, CONVERTING
= 5V, STATIC
= 5V, CONVERTING
0
TEMPERATURE (°C)
= 20pF, 4.7µF capacitor at REF,
20
V
DD
Pin Description
40
= 3V, STATIC
60
80
100
7