2
8/1/00
SPT7936
ABSOLUTE MAXIMUM RATINGS (Beyond which damage may occur)
1
25
°
C
Supply Voltages
V
DD1...................................................................
- 0.3 V to +6 V
V
DD2...................................................................
- 0.3 V to +6 V
Input Voltages
Analog In....................................... - 0.3 V to V
DD
+ 0.3 V
Digital In ........................................ - 0.3 V to V
DD
+ 0.3 V
REF
P....................................................
- 0.3 V to V
DD
+ 0.3 V
REF
N....................................................
- 0.3 V to V
DD
+ 0.3 V
CLOCK.......................................... - 0.3 V to V
DD
+ 0.3 V
Note:
1.
Operation at any Absolute Maximum Rating is not implied. See Electrical Specifications for proper nominal
applied conditions in typical applications.
Temperatures
Operating Temperature ................................. 0 to +70
°
C
Storage Temperature...............................- 65 to +125
°
C
ELECTRICAL SPECIFICATIONS
T
A
= T
MIN
-T
MAX
, V
DD1
=V
DD2
= 3.3 V, Sampling Rate = 28 MSPS, Differential input signal, 50% duty cycle clock with 2.5 ns rise and fall times, unless otherwise
specified.
TEST
CONDITIONS
TEST
LEVEL
SPT7936
PARAMETERS
MIN
TYP
MAX
UNITS
DC Accuracy
Differential Nonlinearity (DNL)
Integral Nonlinearity
Common Mode Rejection Ratio (CMRR)
No Missing Codes
VI
VI
V
±
0.5
±
1.3
54
±
1.0
±
3.0
LSB
LSB
dB
Guaranteed
Analog Input
Input Voltage Range (differential) VFSR
Common Mode Input Voltage VCMI
Input Capacitance C
IN
(From Each Input to Ground)
Midscale Offset V
OS
Gain Error
Input Bandwidth
IV
IV
V
0.6
1.2
±
1
1.5
±
1.2
1.6
V
V
pF
2
V
IN
+=V
IN
–=V
CM
V
V
V
±
2
-0.2
150
%
%
MHz
Large Signal
Reference Voltages
Internal Reference Voltage on Pin 10 (V
REFNI
)
Internal Reference Voltage on Pin 11 (V
REFPI
)
Internal Reference Voltage Drift
Negative Input Voltage (V
REF
-)
Positive Input Voltage (V
REF
+)
Reference Input Voltage Range (V
REF
+ — V
REF
-)
Common Mode Output Voltage (V
CM
)
Bandgap Output Voltage (V
BGAP
)
VI
VI
IV
VI
VI
IV
VI
VI
0.95
1.95
1.0
2.0
1.05
2.05
100
1.3
2.3
1.2
1.55
2.465
V
V
ppm/
°
C
V
V
V
V
V
0.9
1.9
0.6
1.45
2.365
1.0
2.0
1.0
1.50
2.415
Dynamic Performance
Effective Number of Bits
f
IN
= 5.0 MHz
f
IN
= 10.0 MHz
f
IN
= 5.0 MHz
f
IN
= 10.0 MHz
f
IN
= 5.0 MHz
f
IN
= 10.0 MHz
f
IN
= 5.0 MHz
f
IN
= 10.0 MHz
V
VI
V
VI
V
VI
V
VI
10.0
9.7
62
60
64
63
–66
–64
Bits
Bits
dB
dB
dB
dB
dB
dB
9.2
Signal to Noise and Distortion Ratio (SINAD)
57
Signal to Noise Ratio (SNR)
Without Harmonics
Total Harmonic Distortion (THD)
59
–61