NSC CLC5958SLB Datasheet
Output Response with GSM 1800 Blocker
Power at the Antenna (dBm)
Frequency (MHz)
-20
-40
-60
-80
-100
-120
0
5
25
10
15
20
Full Scale = -24dBM
Res. BW = 200KHz
-25dBm blocker
-101dBm reference
N
CLC5958
14-bit, 52MSPS A/D Converter
September 1999
CLC5958
14-bit, 52MSPS A/D Converter
General Description
The CLC5958 is a monolithic 14-bit, 52MSPS analog-to-digital
converter. The ultra-wide dynamic range and high sample rate of
the device make it an excellent choice for wideband receivers
found in multi-channel basestations. The CLC5958 integrates a
low distortion track-and-hold amplifier and a 14-bit multi-stage
quantizer on a single die. Other features include differential
analog inputs, low jitter differential clock inputs, an internal
bandgap voltage reference, and CMOS/TTL compatible outputs.
The CLC5958 is fabricated on the National ABIC-V 0.8 micron
BiCMOS process.
The CLC5958 features a 90dB spurious free dynamic range
(SFDR) and a 70dB signal to noise ratio (SNR). The balanced
differential analog inputs ensure low even-order distortion, while
the differential clock inputs permit the use of balanced clock signals
to minimize clock jitter. The 48-pin CSP package provides an
extremely small footprint for applications where space is a critical
consideration. The package also provides a very low thermal
resistance to ambient. The CLC5958 may be operated with a
single +5V power supply. Alternatively, an additional supply may
be used to program the digital output levels over the range of
+3.3V to +5V. Operation over the industrial temperature range of
-40°C to +85°C is guaranteed. National Semiconductor tests
each part to verify compliance with the guaranteed specifications.
Features
• 14-bit
• 52MSPS
• Ultra-wide dynamic range
Noise floor: -72dBFS
SFDR: 90dB
• Excellent performance to Nyquist
• IF sampling capability
• Very small package: 48-pin CSP
• Programmable output levels:
3.3V to 5V
Applications
• Multi-channel basestations
• Multi-standard basestations:
GSM, WCDMA, DAMPS, etc.
• Smart antenna systems
• Wireless local loop
• Wideband digital communications
Actual Size
(Bottom View)
Single-Tone Output Spectrum
0
-20
© 1999 National Semiconductor Corporation http://www.national.com
Printed in the U.S.A.
-40
-60
-80
Power (dBFS)
-100
-120
0
5
Frequency (MHz)
Sample Rate = 52MSPS
Input Frequency = 5MHz
10
15
20
25
Ω
µ
µ
CLC5958 Electrical Characteristics
(V
= +5V, DV
cc
= +3.3V, 52MSPS; unless specified, T
cc
= -40°C, T
min
= +85°C)
max
PARAMETERS CONDITIONS TEMP RATINGS UNITS NOTES
MIN TYP MAX
RESOLUTION
DIFF. INPUT VOLTAGE RANGE
MAXIMUM CONVERSION RATE
SNR
SFDR
SFDR EXCLUDING 2nd & 3rd HARM. f
NO MISSING CODES
f
= 10MHZ, A
in
f
= 10MHZ, A
in
= 10MHZ, A
in
f
= 10MHZ, A
in
= -0.6dBFS +25°C 69 71 dBFS 1
in
= -0.6dBFS +25°C 80 90 dB 1
in
= -0.6dBFS +25°C 85 92 dB 1
in
= -0.6dBFS +25°C Guaranteed 1
in
Full 14 Bits 1
Full 2.048 V
Full 52 65 MSPS 1
NOISE AND DISTORTION
noise floor 2
f
= 5MHz A
in
f
= 5MHz A
in
= -1dBFS +25°C -71.0 dBFS
in
= -20dBFS +25°C -72.0 dBFS
in
2nd & 3rd harmonic distortion (w/o dither)
= 5MHz A
f
in
f
= 20MHz A
in
f
= 70MHz A
in
= -1dBFS +25°C -90 dBFS
in
= -1dBFS +25°C -87 dBFS
in
= -3dBFS +25°C -78 dBFS
in
next worst harmonic distortion (w/o dither) 3
= 5MHz A
f
in
f
= 20MHz A
in
f
= 70MHz A
in
= -1dBFS +25°C -92 dBFS
in
= -1dBFS +25°C -90 dBFS
in
= -3dBFS +25°C -90 dBFS
in
worst harmonic distortion (with dither) 4
= 5MHz A
f
in
f
= 20MHz A
in
f
= 70MHz A
in
f
= 70MHz (2nd & 3rd excluded) A
in
= -6dBFS +25°C -95 dBFS
in
= -6dBFS +25°C -95 dBFS
in
= -6dBFS +25°C -82 dBFS
in
= -6dBFS +25°C -95 dBFS
in
2-Tone IM distortion (w/o dither)
f
=12MHz, f
in1
= 15MHz A
in2
in1
= A
= -7dBFS +25°C -100 dBFS
in2
SINAD (w/o dither)
= 5MHz A
f
in
= -1dBFS +25°C 69 dB
in
CLOCK RELATED SPURIOUS TONES
fs/8, fs/4 +25°C -95 dBFS
next worst clock spur +25°C -100 dBFS 5
calibration sideband coefficient +25°C 100e-6 6
DC ACCURACY AND PERFORMANCE
differential non-linearity +25°C ±0.3 LSB
integral non-linearity +25°C ±1.5 LSB
offset error +25°C ±2.0 mV
gain error +25°C 2 % of FS
DYNAMIC PERFORMANCE
large-signal bandwidth +25°C 210 MHz
aperture jitter +25°C 0.5 ps(rms)
TIMING
effective aperture delay (t
pipeline delay (t
) Full 3 clk cycle
P
output buffer delay (t
data valid buffer delay (t
) +25°C -0.2 ns
A
) +25°C 6.6 ns
o
) +25°C 6.6 ns
DAV
ANALOG INPUT CHARACTERISTICS
single-ended input resistance +25°C 500
single-ended capacitance +25°C 3.6 pF
ENCODE INPUT CHARACTERISTICS
VIH Full 3.9 4.5 V 7
VIL Full 3.0 3.8 V 7
differential input swing Full 0.2 V
IIL Full 2
IIH Full 25
A
A
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
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2
CLC5958 Electrical Characteristics
(V
= +5V, DV
cc
= +3.3V, 52MSPS; unless specified, T
cc
= -40°C, T
min
= +85°C)
max
PARAMETERS CONDITIONS TEMP RATINGS UNITS NOTES
MIN TYP MAX
DIGITAL OUTPUT CHARACTERISTICS
VOH IOH = 50 µ A Full 3.2 V
VOL IOL = 50 µ A Full 0.1 V
SUPPLY CHARACTERISTICS
+5V supply current (V
+3.3V supply current (DV
) +25°C 260 300 mA 1
CC
) +25°C 32 40 mA 1
CC
power dissipation +25°C 1.4 W
power supply rejection ratio +25°C 0.75 mV/V
V
CC
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
CLC5958 Timing Diagram
1) These parameters are 100% tested at 25°C.
2) Harmonics and clock spurious are removed in noise
measurements.
3) 4th or higher harmonic.
4) Low frequency dither injected in the DC to 500KHz band.
5) Next worst clock spur is a subharmonic of fs, but not fs/8 or fs/4.
See text on spurious.
N + 1
Notes
6) See text on calibration sidebands in the application
information section.
7) Encode levels are referenced to V
1.1V below V
, and the maximum VIH value is 0.5V below V
CC
, i.e. the minimum VIH value is
CC
CC
.
Analog
Input
t
A
ENCODE
Data
DAV
N
N-3
t
O
t
DAV
N+1
N-2
N+2
CLC5958 Timing Diagram
Absolute Maximum Ratings
positive supply voltage (V
differential voltage between any two grounds <200mV
analog input voltage range GND to V
digital input voltage range -0.5V to +V
output short circuit duration (one-pin to ground) infinite
junction temperature 175°C
storage temperature range -65°C to 150°C
lead solder duration (+240°C) 5sec
Note: Absolute maximum ratings are limiting values , to be applied individually, and
beyond which the serviceability of the circuit may be impaired. Functional
operability under any of these conditions is not necessarily implied. Exposure to
maximum ratings for extended periods may affect device reliability.
) -0.5V to +6V
CC
CC
CC
tO: Delay from rising edge of
ENCODE to output data
transition – nominally 6.6ns
: Delay from falling edge of
t
DAV
ENCODE to rising edge of DAV
– nominally 6.6ns
: Effective aperture delay
t
A
– nominally -0.2ns
N-1
N+3
N
Recommended Operating Conditions
positive supply voltage (V
analog input voltage range 2.048V
input coupling AC
operating temperature range -40°C to +85°C
digital output supply voltage (DV
analog input common mode voltage V
) +5V ±5%
CC
) +3.3V ±5%
CC
±0.025V
cm
diff.
pp
Pac kage Thermal Resistance
Package
48-pin CSP 39°C/W 5°C/W
θ
JA
θ
JC
Pac kage Transistor Count
Transistor count 10,000
Ordering Information
Model Temperature Range Description
CLC5958SLB -40°C to +85°C 48-pin CSP (industrial temperature range)
CLC5958PCASM Fully loaded evaluation board with CLC5958 … ready for test.
3
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CLC5958 Typical Performance Characteristics
(V
= +5V, 52MSPS; unless specified)
cc
Single-Tone Output Spectrum
0
-20
-40
-60
-80
Power (dBFS)
-100
-120
0
10
5
Fs = 52MSPS
F
in
A
in
15
= 5MHz
= -0.6dBFS
20
-20
-40
-60
-80
Power (dBFS)
-100
-120
25
Frequency (MHz)
Single-Tone Output Spectrum (w/Dither)
0
-20
-40
Dither
-60
-80
Power (dBFS)
-100
Fs = 52MSPS
F
= 10MHz
in
A
= -6dBFS
in
-20
-40
-60
-80
-100
Power at the Antenna (dBm)
-120
10
15
0
5
20
25
-120
Frequency (MHz)
Single-Tone Output Spectrum
0
Fs = 52MSPS
F
= 75MHz
in
A
= -3.2dBFS
in
Fundamental = 75MHz
2nd
0
5
3rd
10
15
Frequency (MHz)
Single-Tone Output Spectrum
w/200KHz Res. BW
Full Scale = -24dBm
F
= 10MHz
in
A
= -25dBm
in
-101dBm reference
10
0
5
15
Frequency (MHz)
20
25
20
25
Two-Tone Output Spectrum
0
-20
f1
-40
-60
-80
Power (dBFS)
-100
f2-f1
-120
0
5
Frequency (MHz)
Differential Non-Linearity
1.0
0.6
0.2
LSBs
-0.2
-0.6
-1.0
0
4000
10
f2
f1+f2
8000
Code
Fs = 52MSPS
f
= 5MHz
1
f
= 10MHz
2
2f2-f1
15
Fs = 52MSPS
F
= 4.9791
in
12000 16000
Two-Tone Output Spec. w/200KHz Res. BW
-20
-40
-60
-80
-100
F
= 5MHz
in1
F
= 10MHz
in2
A
= -31dBm
in1
A
= -31dBm
in2
Power at the Antenna (dBm)
20
25
0
-120
10
15
5
20
25
Frequency (MHz)
Integral Non-Linearity
3.0
2.0
1.0
0
LSBs
-1.0
-2.0
-3.0
0
4000
8000
Fs = 52MSPS
F
= 4.9791MHz
in
12000 16000
Code
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