10-Bit 40 MSPS
Low Power: 940 mW
53 dB SNR @ 10 MHz AIN
On-Chip Track-and-Hold, Reference
2 V p-p Analog Input
Fully Characterized Dynamic Performance
FUNCTIONAL BLOCK DIAGRAM
Ultrasound Medical Imaging
Advanced Television (MUSE Decoders)
The AD9040A is a complete 10-bit monolithic sampling analog-
Lto-digital converter (ADC) with on-board track-and-hold (T/H)
and reference. The unit is designed for low cost, high perfor-
Emance applications and requires only an encode signal to achieve
T40 MSPS sample rates with 10-bit resolution.
EDigital inputs and outputs are CMOS compatible; the analog
1. CMOS compatible logic for direct interface to ASICs.
2. On-board track-and-hold provides excellent high frequency
performance on analog inputs, critical for communications
and medical imaging applications.
3. High input impedance and 2 V p-p input range reduce need
for external amplifiers.
input requires a signal of 2 V p-p amplitude. The two-step
4. Easy to use; no cumbersome external voltage references
architecture used in the AD9040A is optimized to provide the
required, allowing denser packing of ADCs for multichannel
best dynamic performance available while maintaining low
power requirements of only 940 mW typically; maximum dissi-
5. Available in 28-lead PDIP and SOIC packages.
pation is 1.1 W at 40 MSPS.
6. Evaluation board includes AD9040AJR, reconstruction DAC,
and latches. Space is available near the analog input and digital
The signal-to-noise ratio (SNR), including harmonics, is 53 dB,
outputs of the converter for additional circuits. Order as part
or 8.5 ENOB, when sampling an analog input of 10.3 MHz at
number AD9040A/PCB (schematic shown in data sheet).
40 MSPS. Competitive devices perform at less than 7.5 ENOB
and require external references and larger input signals.
The AD9040A A/D converter is available in either a 28-lead
PDIP or a 28-lead SOIC package. The two models operate over
a commercial temperature range of 0°C to 70°C. Contact the
factory regarding availability of ceramic military temperature
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