ADC16071 Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – 16-Bit Delta-Sigma 192 ks/s Analog-to-Digital Converters

February 1995
ADC16071 ADC16471
16-Bit Delta-Sigma 192 ks s Analog-to-Digital Converters
General Description
The ADC16071 ADC16471 are 16-bit delta-sigma analog-
to-digital converters using 64 c oversampling at
12 288 MHz A 5th-order comb filter and a 246 tap FIR deci-
mation filter are used to achieve an output data rate of up to
192 kHz The combination of oversampling and internal digi-
tal filtering greatly reduces the external anti-alias filter re-
quirements to a simple RC low pass filter The FIR filters
offer linear phase response 0 005 dB passband ripple and
t_{90 dB stopband rejection The ADC16071 ADC16471’s}
analog fourth-order modulator uses switched capacitor
technology A built-in fully-differential bandgap voltage ref-
erence is also included in the ADC16471 The ADC16071
has no internal reference and requires externally applied
reference voltages
The ADC16071 ADC16471 use an advanced BiCMOS pro-
cess for a low power consumption of 500 mW (max) while
operating from a single 5V supply A power-down mode re-
duces the power supply current from 100 mA (max) in the
active mode to 1 3 mA (max)
The ADC16071 ADC16471 are ideal analog-to-digital front
ends for signal processing applications They provide a
complete high resolution signal acquisition system that re-
quires a minimal external anti-aliasing filter reference or
interface logic
The ADC16071 ADC16471’s serial interface is compatible
with the DSP56001 TMS320 and ADSP2100 digital signal
processors
Key Specifications
Y _Resolution
Y _{Total harmonic distortion}
48 kHz output data rate
192 kHz output data rate
Y _{Maximum output data rate}
Y _{Power dissipation}
Active
192 kHz output data rate
48 kHz output data rate
Power-down
16 bits
b94 dB (typ)
b80 dB (typ)
192 kHz (min)
500 mW (max)
275 mW (max)
6 5 mW (max)
Key Features
Y _{Voltage reference (ADC16471 only)}
Y _{Fourth-order modulator}
Y ₆₄ c _{oversampling with a 12 288 MHz sample rate}
Y _{Adjustable output data rate from 7 kHz to 192 kHz}
Y _{Linear-phase digital anti-aliasing filter}
0 005 dB passband ripple
90 dB stopband rejection
Y _Single a_{5V supply}
Y _{Power-down mode}
Y _{Serial data interface compatible with popular}
DSP devices
Applications
Y _{Medical instrumentation}
Y _{Process control systems}
Y _{Test equipment}
Y _{High sample-rate audio}
Y _{Digital Signal Processing (DSP) analog front-end}
Y _{Vibration and noise analysis}
Connection Diagram
Ordering Information
Part No
Package
ADC16471CIN
ADC16471CIWM
ADC16071CIN
ADC16071CIWM
24-Pin Molded DIP
24-Pin SOIC
24-Pin Molded DIP
24-Pin SOIC
NS Package
No
N24C
M24B
N24C
M24B
TL H 11454 – 2
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL H 11454
RRD-B30M75 Printed in U S A