Datasheet

ADS1675
www.ti.com SBAS416D –DECEMBER 2008–REVISED AUGUST 2010
ELECTRICAL CHARACTERISTICS
All specifications are at T
A
= –40°C to +85°C, AVDD = 5V, DVDD = 3V, f
CLK
= 32MHz, V
REF
= +3V, and R
BIAS
= 7.5kΩ,
unless otherwise noted.
ADS1675
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUTS
Full-scale input voltage V
IN
= (AINP – AINN) ±V
REF
V
Common-mode input voltage V
CM
= (AINP + AINN)/2 2.5 V
AC PERFORMANCE
Data rate (f
DATA
) See Table 1 kSPS
Inputs shorted together, Low-Latency path,
100 103
f
DATA
= 4MSPS
Inputs shorted together, Low-Latency path,
Dynamic range 100.5 103.5 dB
f
DATA
=2MSPS
Inputs shorted together, Low-Latency path,
108 111
f
DATA
= 125kSPS
f
IN
= 10kHz, –0.5dBFS,
92
Wide-Bandwidth path, f
DATA
= 4MSPS
f
IN
= 10kHz, –0.5dBFS,
Signal-to-noise ratio (SNR) 97 dB
Wide-Bandwidth path, f
DATA
= 2MSPS
f
IN
= 1kHz, –0.5dBFS,
107
Wide-Bandwidth path, f
DATA
= 125kSPS
f
IN
= 10kHz, –0.5dBFS,
–103
Wide-Bandwidth path, f
DATA
= 4MSPS
f
IN
= 10kHz, –0.5dBFS,
Total harmonic distortion (THD) –103 dB
Wide-Bandwidth path, f
DATA
= 2MSPS
f
IN
= 1kHz, –0.5dBFS,
–107
Wide-Bandwidth path, f
DATA
= 125kSPS
f
IN
= 1kHz, –0.5dBFS, Wide-Bandwidth path,
120
f
DATA
= 4MSPS, signal harmonics excluded
Spurious-free dynamic range (SFDR) dB
f
IN
= 10kHz, –0.5dBFS, Wide-Bandwidth path,
120
f
DATA
= 4MSPS, signal harmonics excluded
DC PRECISION
Low-speed mode (DRATE = 000 to 011) 24 Bits
Resolution
High-speed mode (DRATE = 100, 101) 23 Bits
24
Low-speed mode (DRATE = 000 to 011) Bits
(monotonic)
Differential nonlinearity
23
High-speed mode (DRATE = 100, 101) Bits
(monotonic)
Integral nonlinearity 3 15 ppm of FSR
Offset error T
A
= +25°C –5 5 mV
Offset error drift 4 mV/°C
Gain error T
A
= +25°C 1 %
Gain error drift 4 ppm/°C
Noise See Noise Performance table (Table 1)
Common-mode rejection At dc 71 dB
DIGITAL FILTER CHARACTERISTICS (WIDE-BANDWIDTH PATH)
Passband 0 0.424f
DATA
Hz
Passband ripple ±0.00002dB dB
–0.1dB attenuation 0.432f
DATA
Hz
Passband transition
–3dB attenuation 0.488f
DATA
Hz
Stop band 0.576f
DATA
f
CLK
– 0.576f
DATA
Hz
Stop band attenuation 86 dB
Group delay 28 t
DRDY
Settling time See the Wide-Bandwidth Filter section
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