Texas Instruments ADS869 Series, Manual

Page: 7 / 78

ADS8694, ADS8698
www.ti.com SBAS686 – JULY 2015
Electrical Characteristics (continued)
Minimum and maximum specifications are at T
A
= –40°C to 125°C. Typical specifications are at T
A
= 25°C.
AVDD = 5 V, DVDD = 3 V, V
REF
= 4.096 V (internal), and f
SAMPLE
= 500 kSPS, unless otherwise noted.
TEST
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
LEVEL
(1)
SYSTEM PERFORMANCE
Resolution 18 Bits A
NMC No missing codes 18 Bits A
DNL Differential nonlinearity –0.99 ±0.5 2 LSB
(3)
A
INL Integral nonlinearity
(4)
–5 ±1.5 5 LSB A
E
G
Gain error At T
A
= 25°C, all input ranges ±0.02 ±0.05 %FSR
(5)
A
Gain error matching
At T
A
= 25°C, all input ranges ±0.02 ±0.05 %FSR A
(channel-to-channel)
Gain error temperature drift All input ranges 1 4 ppm/°C B
At T
A
= 25°C,
±0.5 ±1 A
input range = ±2.5 × V
REF
(6)
At T
A
= 25°C,
±0.5 ±1 A
input range = ±1.25 × V
REF
At T
A
= 25°C,
E
O
Offset error ±0.5 ±1.5 mV A
input range = ±0.625 × V
REF
At T
A
= 25°C,
±0.5 ±2 A
input range = 0 to 2.5 × V
REF
At T
A
= 25°C,
±0.5 ±2 A
input range = 0 to 1.25 × V
REF
At T
A
= 25°C,
±0.5 ±1 A
input range = ±2.5 × V
REF
(6)
At T
A
= 25°C,
±0.5 ±1 A
input range = ±1.25 × V
REF
Offset error matching At T
A
= 25°C,
±0.5 ±1.5 mV A
(channel-to-channel) input range = ±0.625 × V
REF
At T
A
= 25°C,
±0.5 ±2 A
input range = 0 to 2.5 × V
REF
At T
A
= 25°C,
±0.5 ±2 A
input range = 0 to 1.25 × V
REF
Offset error temperature drift All input ranges 1 3 ppm/°C B
SAMPLING DYNAMICS
t
CONV
Conversion time 825 ns A
t
ACQ
Acquisition time 1175 ns A
Maximum throughput rate
f
S
500 kSPS A
without latency
(3) LSB = least significant bit.
(4) This parameter is the endpoint INL, not best-fit INL.
(5) FSR = full-scale range.
(6) Does not include the shift in offset over time.
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