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FEATURES
D
High-Speed, Wide Bandwidth
ADC
D
10MSPS Output Data Rate
D
4.9MHz Signal Bandwidth
D
86dBFS Signal-to-Noise Ratio
D
-94dB Total Harmonic Distortion
D
95dB Spurious-Free Dynamic Range
D
On-Chip Digital Filter Simplifies Anti-Alias
Requirements
D
SYNC Pin for Simultaneous Sampling with
Multiple ADS1610s
D
Low 3
s Group Delay
D
Parallel Interface
D
Directly Connects to TMS320 DSPs
D
Out-of-Range Alert Pin
D
Pin-Compatible with ADS1605 (5MSPS ADC)
APPLICATIONS
D
Scientific Instruments
D
Test Equipment
D
Communications
DESCRIPTION
The ADS1610 is a high-speed, high-precision, delta-
sigma (
) analog-to-digital converter (ADC) with 16-bit
resolution operating from a +5V analog and a +3V digital
supply. Featuring an advanced multi-stage analog
modulator combined with an on-chip digital decimation
filter, the ADS1610 achieves 86dBFS signal-to-noise ratio
(SNR) in a 5MHz signal bandwidth. The device offers
outstanding performance at these speeds with a total
harmonic distortion of -94dB.
The ADS1610
topology provides key system-level
design advantages with respect to anti-alias filtering and
clock jitter. The design of the anti-alias filter is simplified
since the on-chip digital filter greatly attenuates
out-of-band signals. The ADS1601s filter has a brick wall
response with a very flat passband (
0.0002dB of ripple)
followed immediately by a very wide stop band (5MHz to
55MHz). Clock jitter becomes especially critical when
digitizing high frequency, large-amplitude signals. The
ADS1610 significantly reduces clock jitter sensitivity by an
effective averaging of clock jitter as a result of
oversampling the input signal.
Output data is supplied over a parallel interface and easily
connects to TMS320 digital signal processors (DSPs).
The power dissipation can be adjusted with an external
resistor, allowing for reduction at lower operating speeds.
With its outstanding high-speed performance, the
ADS1610 is well-suited for demanding applications in data
acquisition, scientific instruments, test and measurement
equipment, and communications. The ADS1610 is offered
in a TQFP-64 package and is specified from -40
C to
+85
C.
VREFP
AINP
AINN
VREFN
Modulator
Digital
Filter
Parallel
Interface
Bias Circuits
VMID
RBIAS
VCAP
AVDD
AGND
DGND
DVDD
PD
SYNC
CLK
CS
2xMODE
RD
DRDY
OTR
DOUT[15:0]
ADS1610
PRODUCT PREVIEW
ADS1610
SBAS344A - AUGUST 2005 - REVISED SEPTEMBER 2005
16-Bit, 10MSPS
ANALOG-TO-DIGITAL CONVERTER
PRODUCT PREVIEW information concerns products in the formative or design
phase of development. Characteristic data and other specifications are design
goals. Texas Instruments reserves the right to change or discontinue these
products without notice.
www.ti.com
Copyright
2005, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners.
ADS1610
SBAS344A - AUGUST 2005 - REVISED SEPTEMBER 2005
www.ti.com
2
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted
(1)
ADS1610
UNIT
AVDD to AGND
-0.3 to +6
V
DVDD to DGND
-0.3 to +3.6
V
AGND to DGND
-0.3 to +0.3
V
Input Current
100mA, Momentary
Input Current
10mA, Continuous
Analog I/O to AGND
-0.3 to AVDD + 0.3
V
Digital I/O to DGND
-0.3 to DVDD + 0.3
V
Maximum Junction Temperature
+150
C
Operating Temperature Range
-40 to +105
C
Storage Temperature Range
-60 to +150
C
Lead Temperature (soldering, 10s)
+260
C
(1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods
may degrade device reliability. These are stress ratings only, and
functional operation of the device at these or any other conditions
beyond those specified is not implied.
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be
handled with appropriate precautions. Failure to observe
proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
For the most current package and ordering information,
see the Package Option Addendum at the end of this
document, or see the TI website at www.ti.com.
PRODUCT PREVIEW
ADS1610
SBAS344A - AUGUST 2005 - REVISED SEPTEMBER 2005
www.ti.com
3
ELECTRICAL CHARACTERISTICS
All specifications at -40
C to +85
C, AVDD = 5V, DVDD = 3V, f
CLK
= 60MHz, V
REF
= +3V, 2xMODE = low, V
CM
= 2.5V, and RBIAS = 18k
,
unless otherwise noted.
ADS1610
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analog Input
Differential input voltage (V
IN
)
Differential input voltage (V
IN
)
(AINP - AINN)
V
REF
V
Differential input voltage (V
IN
)
(AINP - AINN)
V
REF
V
(AINP - AINN)
V
REF
V
Common-mode input voltage (V
CM
)
(AINP + AINN)/2
2.5
V
Absolute input voltage
(AINP or AINN with respect to AGND)
-0.1
4.2
V
Dynamic Specifications
Data rate
10
f
CLK
60MHz
MSPS
f
SIG
= 100kHz, -2dBFS
86
dBFS
Signal-to-noise ratio (SNR)
f
SIG
= 1MHz, -2dBFS
85
dBFS
Signal-to-noise ratio (SNR)
f
SIG
= 4MHz, -2dBFS
85
dBFS
f
SIG
= 100kHz, -2dBFS
-90
dB
f
SIG
= 100kHz, -6dBFS
-95
dB
f
SIG
= 100kHz, -20dBFS
-95
dB
f
SIG
= 1MHz, -2dBFS
-89
dB
Total harmonic distortion (THD)
f
SIG
= 1MHz, -6dBFS
-93
dB
Total harmonic distortion (THD)
f
SIG
= 1MHz, -20dBFS
-95
dB
f
SIG
= 4MHz, -2dBFS
-109
dB
f
SIG
= 4MHz, -6dBFS
-105
dB
f
SIG
= 4MHz, -20dBFS
-95
dB
f
SIG
= 100kHz, -2dBFS
85
dBFS
Signal-to-noise and distortion (SINAD)
f
SIG
= 1MHz, -2dBFS
84
dBFS
Signal-to-noise and distortion (SINAD)
f
SIG
= 4MHz, -2dBFS
85
dBFS
f
SIG
= 100kHz, -2dBFS
90
dB
f
SIG
= 100kHz, -6dBFS
96
dB
f
SIG
= 100kHz, -20dBFS
96
dB
f
SIG
= 1MHz, -2dBFS
91
dB
Spurious-free dynamic range (SFDR)
f
SIG
= 1MHz, -6dBFS
93
dB
Spurious-free dynamic range (SFDR)
f
SIG
= 1MHz, -20dBFS
96
dB
f
SIG
= 4MHz, -2dBFS
109
dB
f
SIG
= 4MHz, -6dBFS
105
dB
f
SIG
= 4MHz, -20dBFS
95
dB
Intermodulation distortion
f
1
= 3.8MHz, -8dBFS
f = 4MHz, -8dBFS
TBD
dB
Intermodulation distortion
f
1
= 3.8MHz, -8dBFS
f
2
= 4MHz, -8dBFS
TBD
dB
Aperture jitter
Excludes jitter of CLK source
2
ps, rms
Aperture delay
4
ns
PRODUCT PREVIEW
ADS1610
SBAS344A - AUGUST 2005 - REVISED SEPTEMBER 2005
www.ti.com
4
ELECTRICAL CHARACTERISTICS (continued)
All specifications at -40
C to +85
C, AVDD = 5V, DVDD = 3V, f
CLK
= 60MHz, V
REF
= +3V, 2xMODE = low, V
CM
= 2.5V, and RBIAS = 18k
,
unless otherwise noted.
ADS1610
PARAMETER
UNIT
MAX
TYP
MIN
TEST CONDITIONS
Digital Filter Characteristics
Passband
0
4.4
f
CLK
60MHz
MHz
Passband ripple
0.0002
dB
Passband transition
-0.1dB attenuation
4.6
f
CLK
60MHz
MHz
Passband transition
-3.0dB attenuation
4.9
f
CLK
60MHz
MHz
Stop band
5.6
54.4
MHz
Stop band attenuation
80
(see Figure 14)
dB
Group delay
3.0
60MHz
f
CLK
s
Settling time
To
0.001%
5.5
s
Static Specifications
Resolution
No missing codes
16
Bits
Input referred noise
TBD
V, rms
Integral nonlinearity
End-point fit, -2dBFS signal
0.75
LSB
Differential nonlinearity
0.5
LSB
Offset error
T = +25
C
TBD
mV
Offset drift
TBD
V//
C
Gain error
T = +25
C
TBD
%
Gain drift
Excluding reference drift
TBD
ppm/
C
Common-mode rejection
At DC
TBD
dB
Power-supply rejection
At DC
TBD
dB
Voltage Reference
V
REF (VREFP - VREFN)
2.9
3.0
3.1
V
VREFP
3.6
4.0
4.4
V
VREFN
0.9
1.0
1.1
V
VMID
2.2
2.5
3.8
V
Digital Input/Output
V
IH
0.7 DVDD
DVDD
V
V
IL
DGND
0.3 DVDD
V
V
OH
I
OH
= -50
A
0.8 DVDD
V
V
OL
I
OL
= 50
A
0.2 DVDD
V
Input leakage
DGND < V
DIGITAL INPUT
< DVDD
10
A
Power-Supply Requirements
AVDD
4.9
5.0
5.1
V
DVDD
2.7
3.0
3.6
V
AVDD current
150
mA
DVDD current
70
mA
Power dissipation
960
mW
PRODUCT PREVIEW
ADS1610
SBAS344A - AUGUST 2005 - REVISED SEPTEMBER 2005
www.ti.com
5
PIN CONFIGURATION
Top View
HTQFP
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
NC
NC
NC
NC
DOUT[15]
DOUT[14]
DOUT[13]
DOUT[12]
DOUT[11]
DOUT[10]
DOUT[9]
DOUT[8]
DOUT[7]
DOUT[6]
DOUT[5]
DOUT[4]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AGND
AVDD
AGND
AINN
AINP
AGND
AVDD
RBIAS
AGND
AVDD
AGND
AVDD
NC
2xMODE
NC
NC
VR
EF
P
VR
EF
P
VM
I
D
VR
EF
N
VR
EF
N
VC
AP
A
V
DD2
A
G
ND2
CL
K
AG
N
D
DG
ND
DV
DD
DV
DD
DG
ND
DV
DD
DV
DD
PD
DV
DD
DG
ND
SY
N
C
CS
RD
OTR
DRD
Y
DG
ND
DV
DD
NC
NC
DO
UT
[
0
]
DO
UT
[
1
]
DO
UT
[
2
]
DO
UT
[
3
]
64
63
62
61
60
59
58
57
56
55
54
17
18
19
20
21
22
23
24
25
26
27
53
52
51
50
49
28
29
30
31
32
ADS1610
PRODUCT PREVIEW
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