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ADS8674, ADS8678
SBAS627 – JULY 2015
Electrical Characteristics (continued)
Minimum and maximum specifications are at T
AVDD = 5 V, DVDD = 3 V, V
PARAMETER
DYNAMIC CHARACTERISTICS
Signal-to-noise ratio
SNR
(V
– 0.5 dBFS at 1 kHz)
IN
Total harmonic distortion
THD
(V
– 0.5 dBFS at 1 kHz)
IN
Signal-to-noise ratio
SINAD
(V
– 0.5 dBFS at 1 kHz)
IN
Spurious-free dynamic range
SFDR
(V
– 0.5 dBFS at 1 kHz)
IN
Crosstalk isolation
Crosstalk memory
BW
Small-signal bandwidth, –3 dB
(–3 dB)
BW
Small-signal bandwidth, –0.1 dB
(–0.1 dB)
AUXILIARY CHANNEL
Resolution
V
AUX_IN voltage range
(AUX_IN)
Operating input range
C
Input capacitance
i
I
Input leakage current
Ikg(in)
DNL
Differential nonlinearity
INL
Integral nonlinearity
E
Gain error
G(AUX)
E
Offset error
O(AUX)
SNR
Signal-to-noise ratio
THD
Total harmonic distortion
SINAD
Signal-to-noise + distortion
SFDR
Spurious-free dynamic range
(7) Calculated on the first nine harmonics of the input frequency.
(8) Isolation crosstalk is measured by applying a full-scale sinusoidal signal up to 10 kHz to a channel, not selected in the multiplexing
sequence, and measuring its effect on the output of any selected channel.
(9) Memory crosstalk is measured by applying a full-scale sinusoidal signal up to 10 kHz to a channel that is selected in the multiplexing
sequence, and measuring its effect on the output of the next selected channel for all combinations of input channels.
8
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= –40°C to 125°C. Typical specifications are at T
A
= 4.096 V (internal), and f
REF
TEST CONDITIONS
Input range = ±2.5 × V
Input range = ±1.25 × V
Input range = ±0.625 × V
Input range = ±0.3125 × V
Input range = ±0.15625 × V
Input range = 2.5 × V
Input range = 1.25 × V
Input range = 0.625 × V
Input range = 0.3125 × V
(7)
All input ranges
Input range = ±2.5 × V
Input range = ±1.25 × V
Input range = ±0.625 × V
Input range = ±0.3125 × V
Input range = ±0.15625 × V
Input range = 2.5 × V
Input range = 1.25 × V
Input range = 0.625 × V
Input range = 0.3125 × V
All input ranges
Aggressor channel input overdriven
(8)
to 2 × maximum input voltage
Aggressor channel input overdriven
(9)
to 2 × maximum input voltage
At T
= 25°C, all input ranges
A
At T
= 25°C, all input ranges
A
(AUX_IN – AUX_GND)
AUX_IN
AUX_GND
During sampling
During conversion
At T
= 25°C
A
At T
= 25°C
A
V
= –0.5 dBFS at 1 kHz
(AUX_IN)
(7)
V
= –0.5 dBFS at 1 kHz
(AUX_IN)
V
= –0.5 dBFS at 1 kHz
(AUX_IN)
V
= –0.5 dBFS at 1 kHz
(AUX_IN)
Product Folder Links:
= 500 kSPS, unless otherwise noted.
SAMPLE
MIN
84.5
REF
84.2
REF
83.5
REF
80
REF
75
REF
84
REF
83.5
REF
80
REF
75
REF
84.3
REF
84
REF
83.3
REF
80
REF
75
REF
83.8
REF
83.3
REF
80
REF
75
REF
14
0
0
–0.75
–1
–5
83.3
83
ADS8674 ADS8678
= 25°C.
A
TYP
MAX
UNIT
85
85
84.5
82
77
dB
85
84.5
82
77
–100
dB
84.8
84.8
84.3
82
77
dB
84.8
84.3
82
77
101
dB
110
dB
90
dB
15
kHz
2.5
kHz
Bits
V
V
REF
V
V
REF
0
V
75
pF
5
pF
100
nA
±0.5
0.75
LSB
±0.5
1
LSB
±0.02
±0.2
%FSR
5
mV
84.4
dB
–100
dB
84.3
dB
100
dB
Copyright © 2015, Texas Instruments Incorporated
www.ti.com
TEST
(1)
LEVEL
A
A
A
A
A
A
A
A
A
B
A
A
A
A
A
A
A
A
A
B
B
B
B
B
A
A
A
A
C
C
A
A
A
A
A
A
B
A
B
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