ML6401 Datasheet, PDF (1/10 Pages) Micro Linear Corporation – 8-Bit 20 MSPS A/D Converter

March 1997
ML6401*
8-Bit 20 MSPS A/D Converter
GENERAL DESCRIPTION
The ML6401 is a single-chip 8-bit 20 MSPS BiCMOS Video
A/D Converter IC, incorporating a differential input track
and hold, clock generation circuitry, and reference voltage.
The input track and hold consists of a low (4pF)
capacitance input and a fast settling operational amplifier.
The A/D conversion is accomplished through a pipeline
approach, reducing the number of required comparators
and latches. The non-over-lapping clocks required for this
architecture are all internally generated. Clock generation
circuitry requires only one 50% duty cycle clock input.
The use of error correction throughout the A/D converter
improves DNL. All bias voltages and currents required by
the A/D converter are internally generated. The digital
outputs are three-stateable.
FEATURES
s 5.0V ±10% single supply operation
s Internal reference voltage
s Power dissipation less than 200mW typical
s Replaces TMC1175MC20 and AD775JR,
functionally compatible to Sony CXD1175AM/AP
s 16-pin reduced pin count packages
available: ML6401CS-3
s Low input capacitance track and hold: 4pF
s Onboard non-overlapping clock generation to
minimize external components
s Three-state outputs and no missing codes
s 150MHz input track and hold
BLOCK DIAGRAM/TYPICAL APPLICATION
VIDEO
INPUT
+
47µF
0.1µF
VIN+
150MHz
T&H
VIN–
VDDA
ADC 1
75Ω
1kΩ 1kΩ
SUB
DAC
AMP
10µF
+
VIN-BIAS
VREFOUT
VREFIN
1.5V
INTERNAL
1.0V _REFERENCES
VDDA
ADC 2
*Some Packages Are End Of Life
5V
VDDA
VDDD
VDDD
OE
D7
D6
SUB
DAC
AMP
ADC 3
D5
DIGITAL
ERROR
D4
CORRECTION
D3
D2
D1
CLOCK GENERATOR
D0
GNDA
GNDA
CLK
GNDD
GNDO
20MHz
1