ADS8556 Datasheet, PDF (12/47 Pages) Texas Instruments – 16-14-12-Bit Six-Channel Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTERS

ADS8556, ADS8557, ADS8558
SBAS404D – OCTOBER 2006 – REVISED FEBRUARY 2016
www.ti.com
6.7 Electrical Characteristics: ADS8557
over recommended operating free-air temperature range of –40°C to 125°C, AVDD = 4.5 V to 5.5 V, BVDD = 2.7 V to 5.5 V,
HVDD = 10 V to 15 V, HVSS = –15 V to –10 V, V_REF = 2.5 V (internal), and f_DATA = 670 kSPS in parallel mode or 470 kSPS in
serial mode (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP ⁽¹⁾
MAX UNIT
DC ACCURACY
Resolution
14
Bits
No missing codes
14
Bits
INL
Integral linearity error
–1
±0.4
1 LSB
DNL Differential linearity error
–1
±0.25
1 LSB
Offset error
–4
±0.8
4 mV
Offset error drift
±3.5
μV/°C
Gain error
Referenced to voltage at REFIO
–0.75
±0.25
0.75 %FSR
Gain error drift
Referenced to voltage at REFIO
±6
ppm/°C
PSRR Power-supply rejection ratio
At output code FFFFh, related to AVDD
60
dB
SAMPLING DYNAMICS
t_ACQ
t_CONV
t_CCLK
Acquisition time
Conversion time per ADC
Internal conversion clock period
280
ns
1.19
μs
18.5
64.1
t_CCLK
ns
f_DATA Throughput rate
Parallel interface, internal clock and reference
Serial interface, internal clock and reference
670
kSPS
470
AC ACCURACY
SNR
SINAD
THD
SFDR
Signal-to-noise ratio
Signal-to-noise ratio + distortion
Total harmonic distortion⁽²⁾
Spurious-free dynamic range
Channel-to-channel isolation
–3-dB small-signal bandwidth
At f_IN = 10 kHz
At f_IN = 10 kHz
At f_IN = 10 kHz
At f_IN = 10 kHz
At f_IN = 10 kHz
In 4 × V_REF mode
In 2 × V_REF mode
84
85
dB
83
84
dB
–91
–86
dB
86
92
dB
100
dB
48
MHz
24
(1) All values are at T_A = 25°C.
(2) Calculated on the first nine harmonics of the input frequency.
12
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