Datasheet

(V
DD
= +4.75V to +5.25V, V
SS
= -10.8V to -15.75V, f
CLK
= 8MHz for MAX120 and 5MHz for MAX122, T
A
= T
MIN
to T
MAX
, unless
otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DYNAMIC PERFORMANCE (MAX120: f
S
= 500kHz, V
AIN
= ±5V
P-P
, 100kHz: MAX122: f
S
= 333kHz, V
AIN
= ±5V
P-P
, 50kHz
Signal-to-Noise Plus Distortion SINAD T
A
= +25°C
MAX120, MAX122 70 72
dBMAX122AC/AE 70
MAX122BC/BE 69
Total Harmonic Distortion
(First Five Harmonics)
THD
T
A
= +25°C
MAX120 -82 -77
dB
MAX122 -85 -78
MAX122AC/AE -77
MAX122BC/BE -75
Spurious-Free Dynamic Range SFDR
T
A
= +25°C
MAX120 77 82
dB
MAX122 78 85
MAX122AC/AE 77
MAX122BC/BE 75
CONVERSION TIME
Synchronous t
CONV
13t
CLK
MAX120 1.63
µs
MAX122 2.60
Clock Frequency f
CLK
MAX120 0.1 8
MHz
MAX122 0.1 5
DIGITAL INPUTS (CLKIN, CONVST, RD, CS)
Input High Voltage V
IH
2.4 V
Input Low Voltage V
IL
0.8 V
Input Capacitance (Note 4) 10 pF
Input Current V
IN
= 0V or V
DD
±5 µA
DIGITAL OUTPUTS (INT/BUSY, D11–D0)
Output Low Voltage V
OL
I
SINK
= 1.6mA 0.4 V
Output High Voltage V
OH
I
SOURCE
= 1mA V
DD
- 0.5 V
Leakage Current I
LKG
V
IN
= 0V or V
DD
, D11–D0 ±5 µA
Output Capacitance (Note 4) 10 pF
POWER REQUIREMENTS
Positive Supply Voltage V
DD
Guaranteed by supply rejection test 4.75 5.25 V
Negative Supply Voltage V
SS
Guaranteed by supply rejection test -10.80 -15.75 V
Positive Supply Current (Note 6) I
DD
V
DD
= 5.25V, V
SS
= -15.75V, V
AIN
= 0V 9 15 mA
Negative Supply Current (Note 6) I
SS
V
DD
= 5.25V, V
SS
= -15.75V, V
AIN
= 0V 14 20 mA
Power Dissipation (Note 6) V
DD
= 5V, V
SS
= -12V, V
AIN
= 0V 210 315 mW
MAX120/MAX122 500ksps, 12-Bit ADCs with Track/Hold
and Reference
www.maximintegrated.com
Maxim Integrated │ 3
Electrical Characteristics (continued)