MAX1106 Datasheet, PDF (9/16 Pages) Maxim Integrated Products – Single-Supply, Low-Power, Serial 8-Bit ADCs

Single-Supply, Low-Power,
Serial 8-Bit ADCs
Typical Operating Characteristics (continued)
(V_DD = +3.0V (MAX1106), V_DD = +5.0V (MAX1107); f_SCLK = 2MHz; 25ksps conversion rate; external reference; 1µF at REFOUT;
T_A = +25°C; unless otherwise noted.)
INTEGRAL NONLINEARITY
vs. DIGITAL CODE
FFT PLOT
CONVERSION TIME vs. SUPPLY VOLTAGE
0.5
20
21.5
0.4
f_IN+ = 10.34kHz, 2Vp-p
0.3
0
f_SAMPLE = 25088Hz
21.0
0.2
-20
20.5
0.1
0
-40
20.0
-0.1
-0.2
-60
19.5
-0.3
-80
19.0
-0.4
-0.5
0
50 100 150 200 250 300
-100
0 2 4 6 8 10 12 14
18.5
0
1
2
3
4
5
6
DIGITAL CODE
FREQUENCY (kHz)
SUPPLY VOLTAGE (V)
CONVERSION TIME vs. TEMPERATURE
25
1.0010
NORMALIZED REFERENCE VOLTAGE
vs. TEMPERATURE
24
23
1.0005
22
21
V_DD = 3V
1.0000
20
19
V_DD = 5V
18
0.9995
0.9990
17
0.9985
16
15
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
0.9980
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
Pin Description
PIN
NAME
FUNCTION
1
V_DD
Positive Supply Voltage
2
IN+
Positive Analog Input. Sampled. Input range from GND to V_DD.
3
IN-
Negative Analog Input. Input range from GND to V_DD.
4
GND
Ground.
5
REFOUT Internal Reference Output. Bypass with 1µF to ground. 2.048V for MAX1106, 4.096V for MAX1107.
6
REFIN
Reference Voltage Input. Reference voltage for analog-to-digital conversion. Connect REFOUT to REFIN
for internal reference. Input range from 1V to V_DD.
7
CONVST
Conversion Start Input. Toggle CONVST high for 1µs minimum and then low to start internal conversion.
Data is not clocked out unless CONVST is low.
8
SHDN
Active-Low Shutdown. Connect to V_DD for normal operation.
9
DOUT
Serial Data Output. Data is clocked out on the falling edge of SCLK. DOUT is high impedance in shutdown
or after all data is clocked out.
10
SCLK
Serial Clock Input. Clocks data out of serial interface.
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