12
ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955
ADS7956, ADS7957, ADS7958, ADS7959, ADS7960, ADS7961
SLAS605C – JUNE 2008 – REVISED JULY 2018
Product Folder Links:
ADS7950 ADS7951 ADS7952 ADS7953 ADS7954 ADS7955 ADS7956 ADS7957 ADS7958
Copyright © 2008–2018, Texas Instruments Incorporated
(1)
Ideal input span; does not include gain or offset error.
(2)
ADS795X, where X indicates 0, 1, 2, or 3.
(3)
LSB means least significant bit.
(4)
Measured relative to an ideal full-scale input.
7.6 Electrical Characteristics: ADS7950, ADS7951, ADS7952, ADS7953
VA = 2.7 V to 5.25 V, VBD = 1.7 V to +VA, V
REF
= 2.5 V ± 0.1 V, T
A
= –40°C to 125°C, f
sample
= 1 MHz (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Full-scale input span
(1)
Range 1
0
V
REF
V
Range 2 while 2xV
REF
≤
+VA
0
2*V
REF
Absolute input range
Range 1
–0.2
V
REF
+ 0.2
V
Range 2 while 2xV
REF
≤
+VA
–0.2
2*V
REF
+ 0.2
Input capacitance
15
pF
Input leakage current
T
A
= 125°C
61
nA
SYSTEM PERFORMANCE
Resolution
12
Bits
No missing codes
ADS795XSB
(2)
12
Bits
ADS795XS
(2)
11
Integral linearity
ADS795XSB
(2)
–1
±0.5
1
LSB
(3)
ADS795XS
(2)
–1.5
±0.75
1.5
Differential linearity
ADS795XSB
(2)
–0.99
±0.5
1
LSB
ADS795XS
(2)
–2
±0.75
1.5
Offset error
(4)
–3.5
±1.1
3.5
LSB
Gain error
Range 1
–2
±0.2
2
LSB
Range 2
±0.2
Total unadjusted error (TUE)
±2
LSB
SAMPLING DYNAMICS
Conversion time
20 MHz SCLK
800
ns
Acquisition time
325
ns
Maximum throughput rate
20 MHz SCLK
1
MHz
Aperture delay
5
ns
Step response
150
ns
Overvoltage recovery
150
ns
