Texas Instruments ADS79 EVM-PDK Series, Руководство пользователя

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ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955
ADS7956, ADS7957, ADS7958, ADS7959, ADS7960, ADS7961
www.ti.com SLAS605C – JUNE 2008 – REVISED JULY 2018
Product Folder Links: ADS7950 ADS7951 ADS7952 ADS7953 ADS7954 ADS7955 ADS7956 ADS7957 ADS7958
ADS7959 ADS7960 ADS7961
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Copyright © 2008–2018, Texas Instruments Incorporated
Electrical Characteristics, ADS7954, ADS7955, ADS7956, ADS7957 (continued)
+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
DIGITAL INPUT/OUTPUT
Logic family CMOS
Logic level
V
IH
0.7*(+VBD)
V
V
IL
+VBD = 5 V 0.8
V
IL
+VBD = 3 V 0.4
V
OH
At I
source
= 200
μ
A +VBD-0.2
V
OL
At I
sink
= 200
μ
A 0.4
Data format MSB first MSB First
POWER SUPPLY REQUIREMENTS
+VA supply voltage 2.7 3.3 5.25 V
+VBD supply voltage 1.7 3.3 5.25 V
Supply current (normal mode)
At +VA = 2.7 to 3.6 V and 1MHz throughput 1.8
mA
At +VA = 2.7 to 3.6 V static state 1.05 1
At +VA = 4.7 to 5.25 V and 1 MHz throughput 2.3 3
At +VA = 4.7 to 5.25 V static state 1.1 1.5
Power-down state supply current 1
μ
A
+VBD supply current +VA = 5.25V, f
s
= 1MHz 1 mA
Power-up time 1 μ s
Invalid conversions after power up or
reset 1
Conversion
(1) Ideal input span; does not include gain or offset error.
(2) LSB means least significant bit.
(3) Measured relative to an ideal full-scale input.
7.8 Electrical Characteristics, ADS7958, ADS7959, ADS7960, ADS7961
+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 –0.20 V
REF
+ 0.2
V
Range 2 while 2xV
REF
≤ +VA –0.20 2*V
REF
+ 0.2
Input capacitance 15 pF
Input leakage current T
A
= 125°C 61 nA
SYSTEM PERFORMANCE
Resolution 8 Bits
No missing codes 8 Bits
Integral linearity –0.3 ±0.1 0.3 LSB
(2)
Differential linearity –0.3 ±0.1 0.3 LSB
Offset error
(3)
–0.5 ±0.2 0.5 LSB
Gain error
Range 1 –0.6 ±0.1 0.6
LSB
Range 2 ±0.1