AD7626_09 Datasheet, PDF (1/28 Pages) Analog Devices – 16-Bit, 10 MSPS, PulSAR Differential ADC

FEATURES
Throughput: 10 MSPS
SNR: 91.5 dB
16-bit no missing codes
INL: ±0.45 LSB
DNL: ±0.35 LSB
Power dissipation: 136mW
32-lead LFCSP (5 mm × 5 mm)
SAR architecture
No latency/no pipeline delay
16-bit resolution with no missing codes
Zero error: ±1LSB
Differential input range: ±4.096 V
Serial LVDS interface
Self-clocked mode
Echoed-clock mode
LVDS or CMOS option for conversion control (CNV signal)
Reference options
Internal: 4.096 V
External (1.2 V) buffered to 4.096 V
External: 4.096 V
APPLICATIONS
Digital imaging systems
Digital X-ray
Digital MRI
CCD and IR cameras
High speed data acquisition
High dynamic range telecommunications receivers
Spectrum analysis
Test equipment
16-Bit, 10 MSPS, PulSAR
Differential ADC
AD7626
FUNCTIONAL BLOCK DIAGRAM
REFIN REF VCM
1.2V
BAND GAP
IN+
IN–
÷2 CLOCK
CAP
DAC
LOGIC
AD7626
SAR
SERIAL
LVDS
VIO
CNV+, CNV–
D+, D–
DCO+, DCO–
CLK+, CLK–
Figure 1.
GENERAL DESCRIPTION
The AD7626 is a 16-bit, 10 MSPS, charge redistribution
successive approximation register (SAR) based architecture
analog-to-digital converter (ADC). SAR architecture allows
unmatched performance both in noise (91.5 dB SNR) and in
linearity (±0.45 LSB INL). The AD7626 contains a high speed,
16-bit sampling ADC, an internal conversion clock, and an
internal buffered reference. On the CNV edge, it samples the
voltage difference between the IN+ and IN− pins. The voltages
on these pins swing in opposite phase between 0 V and REF.
The 4.096 V reference voltage, REF, can be generated internally
or applied externally.
All converted results are available on a single LVDS self-clocked
or echoed-clock serial interface, reducing external hardware
connections.
The AD7626 is housed in a 32-lead, 5 mm × 5 mm LFCSP with
operation specified from −40°C to +85°C.
Table 1. Fast PulSAR® ADC Selection
Input Type
Resolution (Bits)
Differential (Ground Sense)
16
True Bipolar
16
Differential (Antiphase)
16
Differential (Antiphase)
18
1 MSPS to <2 MSPS
AD7653
AD7667
AD7980
AD7983
AD7671
AD7677
AD7623
AD7643
AD7982
AD7984
2 MSPS to 3 MSPS
AD7621
AD7622
AD7641
6 MSPS 10 MSPS
AD7625 AD7626
Rev. 0
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