
MAX1084/MAX1085
400ksps/300ksps, Single-Supply, Low-Power,
Serial 10-Bit ADCs with Internal Reference
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7
2.490
2.496
2.494
2.492
2.498
2.500
2.502
2.504
2.506
2.508
2.510
2.5
3.5
3.0
4.0
4.5
5.0
5.5
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAX1084/5
toc07
SUPPLY VOLTAGE (V)
V
REF
(V)
2.490
2.496
2.494
2.492
2.500
2.498
2.508
2.506
2.504
2.502
2.510
-40
-20
0
20406080
100
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1084/5
toc08
TEMPERATURE (°C)
V
REF
(V)
1.50
2.00
1.75
2.50
2.25
2.75
3.00
2.5
3.5
4.0
3.0
4.5
5.0
5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1084/5
toc09
SUPPLY VOLTAGE (V)
SUPPLY
CURRENT
(mA)
CONVERTING,
SCLK = 6.4MHz
CONVERTING,
SCLK = 4.8MHz
STATIC
CODE = 1111 1111 1111
RL = ∞
CL = 10pF
1.5
1.8
2.4
2.1
2.7
3.0
-40
0
-20
20406080
100
SUPPLY CURRENT vs. TEMPERATURE
MAX1084/5
toc10
TEMPERATURE (
°C)
SUPPLY
CURRENT
(mA)
VDD = 5V, CONVERTING
VDD = 3V, CONVERTING
VDD = 5V, STATIC
VDD = 3V, STATIC
Typical Operating Characteristics (continued)
(MAX1084: VDD = +5.0V, fSCLK = 6.4MHz; MAX1085: VDD = +3.0V, fSCLK = 4.8MHz; CLOAD = 20pF, 4.7F capacitor at REF,
TA = +25°C, unless otherwise noted.)
Pin Description
Serial-Clock Input. SCLK drives the conversion process and clocks data out at rates up to 6.4MHz
(MAX1084) or 4.8MHz (MAX1085).
PIN
Positive Supply Voltage
VDD
1
FUNCTION
NAME
Sampling Analog Input, 0 to VREF Range
AIN
2
Analog and Digital Ground
GND
5
Active-Low Chip Select. Initiates conversions on the falling edge. When CS is high, DOUT is high
impedance.
CS
7
Reference Voltage for Analog-to-Digital Conversion. Internal 2.5V reference output. Bypass with a
4.7F capacitor.
REF
4
Active-Low Shutdown Input. Pulling SHDN low shuts down the device and reduces the supply current
to 2A (typ).
SHDN
3
SCLK
8
Serial-Data Output. DOUT changes state at SCLK’s rising edge. High impedance when CS is high.
DOUT
6