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ADC08161CIN
500 ns A/D Converter with S/H Function and 2.5V Bandgap Reference
ADC08161
500 ns A/D Converter with S/H Function and
2.5V Bandgap Reference
General DescriptionUsinga patented multi-step A/D conversion technique, the
8-bit ADC08161 CMOS A/D converter offers 500ns conver-
sion time, internal sample-and-hold (S/H),a 2.5V bandgap
reference, and dissipates only 100 mWof power. The
ADC08161 performsan 8-bit conversion witha 2-bit voltage
estimator that generatesthe2 MSBs and two low-resolution
(3-bit) flashes that generatethe6 LBSs.
Input signals are tracked and heldby the input sampling
circuitry, eliminating the need for an external
sample-and-hold. The ADC08161 can perform accurate con-
versionsof full-scale input signalsat frequencies fromDCto
typically more than 300 kHz (full power bandwidth) without
the needofan external sample-and-hold (S/H).
For easeof interfaceto microprocessors, this part has been
designedto appearasa memory locationorI/O port without
the needfor external interfacing logic.
Key Specifications Resolution 8 Bits Conversion time (tCONV) 560ns max (WR-RD Mode) Full power bandwidth 300 kHz (typ) Throughput rate 1.5 MHz min Power dissipation 100 mW max Total unadjusted error ±1⁄2 LSB and±1 LSB max
Features No external clock required Analog input voltage range from GNDtoV+ 2.5V bandgap reference
Applications Mobile telecommunications Hard-disk drives Instrumentation High-speed data acquisition systems
Block DiagramDS011149-1
June 1999
ADC08161
A/D
Converter
with
S/H
Function
and
2.5V
Bandgap
Reference
