ADC12DC080_14 Datasheet, PDF (1/27 Pages) Texas Instruments – Dual 12-Bit, 80 MSPS A/D Converter with CMOS Outputs

ADC12DC080
www.ti.com
SNAS405B – SEPTEMBER 2007 – REVISED NOVEMBER 2008
ADC12DC080 Dual 12-Bit, 80 MSPS A/D Converter with CMOS Outputs
Check for Samples: ADC12DC080
FEATURES
1
•2 Internal Sample-and-Hold Circuit and Precision
Reference
• Low Power Consumption
• Clock Duty Cycle Stabilizer
• Single +3.0V Supply Operation
• Power-Down Mode
• Offset Binary or 2's Complement Output Data
Format
• 60-Pin WQFN Package, (9x9x0.8mm, 0.5mm
Pin-Pitch)
APPLICATIONS
• High IF Sampling Receivers
• Wireless Base Station Receivers
• Test and Measurement Equipment
• Communications Instrumentation
• Portable Instrumentation
KEY SPECIFICATIONS
• Resolution 12 Bits
• Conversion Rate 80 MSPS
• SNR (f_IN = 170 MHz) 69.5 dBFS (typ)
• SFDR (f_IN = 170 MHz) 83 dBFS (typ)
• Full Power Bandwidth 1 GHz (typ)
• Power Consumption 600 mW (typ)
DESCRIPTION
The ADC12DC080 is a high-performance CMOS
analog-to-digital converter capable of converting two
analog input signals into 12-bit digital words at rates
up to 80 Mega Sample Per Second (MSPS). These
converters uses a differential, pipelined architecture
with digital error correction and an on-chip sample-
and-hold circuit to minimize power consumption and
the external component count, while providing
excellent dynamic performance. A unique sample-
and-hold stage yields a full-power bandwidth of 1
GHz. The ADC12DC080 may be operated from a
single +3.0V power supply. A power-down feature
reduces the power consumption to very low levels
while still allowing fast wake-up time to full operation.
The differential inputs provide a 2V full scale
differential input swing. A stable 1.2V internal voltage
reference is provided, or the ADC12DC080 can be
operated with an external 1.2V reference. Output
data format (offset binary versus 2's complement)
and duty cycle stabilizer are pin-selectable. The duty
cycle stabilizer maintains performance over a wide
range of clock duty cycles.
The ADC12DC080 is available in a 60-lead WQFN
package and operates over the industrial temperature
range of −40°C to +85°C.
Block Diagram
2
V_INA
12-Bit Pipelined
12
ADC Core
Output ¹²
Buffers
CHANNEL A
DA0-DA11
3
Ref.Decoupling
V_REF
CLK
3
Ref.Decoupling
Reference
A
Reference
B
Timing
Generation
DRDY
2
V_INB
12-Bit Pipelined
12
ADC Core
Output 12
Buffers
CHANNEL B
DB0-DB11
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2008, Texas Instruments Incorporated