18-Bit, 5 MSPS PulSAR
Differential ADC
Data Sheet
AD7960
FEATURES
FUNCTIONAL BLOCK DIAGRAM
REFIN
REF VCM
VDD1 VDD2
VIO
Throughput: 5 MSPS
18-bit resolution with no missing codes
Excellent ac and dc performance
Dynamic range: 100 dB
SNR: 99 dB
THD: −117 dB
EN0
EN1
÷2
CLOCK
EN2
LOGIC
EN3
IN+
IN–
CAP
DAC
CNV+, CNV–
INL: 0.8 LSB (typical), 2 LSB (maximum)
DNL: 0.5 LSB (typical), 0.99 LSB (maximum)
True differential analog input voltage range: 4.096 V or 5 V
Low power dissipation
D+, D–
SERIAL
LVDS
SAR
DCO+, DCO–
CLK+, CLK–
AD7960
GND
46.5 mW at 5 MSPS with external reference buffer
(echoed clock mode)
Figure 1.
GENERAL DESCRIPTION
64.5 mW at 5 MSPS with internal reference buffer
(echoed clock mode)
The AD7960 is an 18-bit, 5 MSPS, charge redistribution successive
approximation (SAR), analog-to-digital converter (ADC). The
SAR architecture allows unmatched performance both in noise
and in linearity. The AD7960 contains a low power, high speed,
18-bit sampling ADC, an internal conversion clock, and an
internal reference buffer. On the CNV edge, the AD7960
samples the voltage difference between the IN+ and IN− pins.
The voltages on these pins swing in opposite phase between 0 V
and 4.096 V and between 0 V and 5 V. The reference voltage is
applied to the part externally. All conversion results are available
on a single LVDS self clocked or echoed clock serial interface.
39 mW at 5 MSPS with external reference buffer
(self clocked mode, CNV in CMOS mode)
SAR architecture
No latency/pipeline delay
External reference options: 2.048 V buffered to 4.096 V (internal
reference buffer), 4.096 V, and 5 V
Serial LVDS interface
Self clocked mode
Echoed clock mode
LVDS or CMOS option for conversion control (CNV signal)
Operating temperature range of −40°C to +85°C
32-lead, 5mm × 5mm LFCSP (QFN)
The AD7960 is available in a 32-lead LFCSP (QFN) with
operation specified from −40°C to +85°C.
APPLICATIONS
Table 1. Fast PulSAR® ADC Selection
Digital imaging systems
Digital X-rays
Computed tomography
IR cameras
MRI gradient control
High speed data acquisition
Spectroscopy
1 MSPS to
<2 MSPS
2 MSPS to
3 MSPS
5 MSPS
to 6 MSPS 10 MSPS
Input Type
Differential,1
16-Bit
AD7653
AD7667
AD7980
AD7983
AD7671
AD7985
True Bipolar,
16-Bit
Differential,2
16-Bit
Differential,2
18-Bit
Test equipment
AD7677
AD7623
AD7643
AD7982
AD7984
AD7621
AD7622
AD7641
AD7986
AD7625
AD7961
AD7960
AD7626
1 Ground sense.
2 Antiphase.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Technical Support
©2013 Analog Devices, Inc. All rights reserved.
www.analog.com