MAX194 Maxim, MAX194 Datasheet - Page 24

• Manufacturer Part Number: MAX194
• Description: 14-Bit / 85ksps ADC with 10A Shutdown
• Manufacturer: Maxim

Spurious-free dynamic range is the ratio of the funda-
mental RMS amplitude to the amplitude of the next
largest spectral component (in the frequency band
above DC and below one-half the sample rate). Usually,
this peak occurs at some harmonic of the input frequen-
cy. However, if the ADC is exceptionally linear, it may
occur only at a random peak in the ADC’s noise floor.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
24
© 1997 Maxim Integrated Products
14-Bit, 85ksps ADC with 10µA Shutdown
Figure 28. MAX194 Unipolar Transfer Function
Figure 26. Effective Bits vs. Input Frequency
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
11 . . . 111
11 . . . 110
11 . . . 101
11 . . . 100
11 . . . 011
11 . . . 010
00 . . . 110
00 . . . 101
00 . . . 100
00 . . . 011
00 . . . 010
00 . . . 001
00 . . . 000
14.0
13.5
13.0
12.5
12.0
11.5
11.0
10.5
10.0
0.1
f
T
S
A
0V
Spurious-Free Dynamic Range
= 85kHz
= +25°C
INPUT FREQUENCY (kHz)
1
10
Printed USA
V
REF
100
- (1LSB)
Figures 28 and 29 show the MAX194’s transfer func-
tions. In unipolar mode, the output data is in binary for-
mat and in bipolar mode it is offset binary.
TRANSISTOR COUNT: 7966
Figure 27. Signal-to-Noise + Distortion vs. Frequency
Figure 29. MAX194 Bipolar Transfer Function
11 . . . 111
11 . . . 110
11 . . . 101
10 . . . 010
10 . . . 001
10 . . . 000
01 . . . 111
01 . . . 110
00 . . . 010
00 . . . 001
00 . . . 000
is a registered trademark of Maxim Integrated Products.
85
75
70
65
90
80
60
0.1
-V
REF
f
T
S
A
= 85kHz
= +25°C
FREQUENCY (kHz)
1
0V
Transfer Function
10
V
REF
100
- (1LSB)