CS5016/14/12A
16, 14, & 12-Bit, Self-Calibrating A/D Converters
Features
-
-
-
-
Monolithic CMOS A/D Converters
Microprocessor Compatible
Parallel and Serial Output
Inherent Track/Hold Input
Description
The CS5012A/14/16 are 12, 14 and 16-bit monolithic an-
alog to digital converters with conversion times of 7.2 µs,
14.25 µs and 16.25 µs. Unique self-calibration circuitry
insures excellent linearity and differential non- linearity,
with no missing codes. Offset and full scale errors are
kept within 1/2 LSB (CS5012A/14) and 1 LSB (CS5016),
eliminating the need for calibration. Unipolar and bipolar
input ranges are digitally selectable.
The pin compatible CS5012A/14/16 consist of a DAC,
conversion and calibration microcontroller, oscillator,
comparator, microprocessor compatible 3-state I/O, and
calibration circuitry. The input track-and-hold, inherent to
the devices' sampling architecture, acquires the input
signal after each conversion using a fast slewing on-chip
buffer amplifier. This allows throughput rates up to
100 kHz (CS5012A), 56 kHz (CS5014) and 50 kHz
(CS5016).
An evaluation board (CDB5012/14/16) is available which
allows fast evaluation of ADC performance.
ORDERING INFORMATION
See pages 39-41.
l
True
12, 14 and 16-Bit Precision
l
Conversion Times:
-
CS5016
-
CS5014
-
CS5012A
l
Self
16.25 µs
14.25 µs
7.20 µs
Calibration Maintains Accuracy Over
Time and Temperature
l
Low Power Dissipation: 150mW
l
Low Distortion
I
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Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
Copyright
©
Cirrus Logic, Inc. 1997
(All Rights Reserved)
MAR ‘95
DS14F6
1
CS5012A
CS5012A ANALOG CHARACTERISTICS
(T
A
= T
MIN
to T
MAX
; VA+, VD+ = 5V;
VA-, VD- = -5V; VREF = 2.5V to 4.5V; f
clk
= 6.4 MHz for -7, 4 MHz for -12; Analog Source Impedance = 200Ω)
CS5012A-K
Parameter*
Specified Temperature Range
Min
Typ
0 to +70
(Note 1)
(Note 2)
(Note 1)
(Note 2)
(Note 1)
(Note 2)
(Note 1)
(Note 2)
(Note 1)
(Note 2)
±1/4
±1/8
±1/2
Max
CS5012A-B
Min
Typ
Max
CS5012-T
Min
Typ
Max
Units
°C
LSB
12
∆LSB
12
-40 to +85
±1/4
±1/8
±1/2
-55 to +125
±1/4
±1/8
±1/2
Accuracy
Linearity Error
Drift
Differential Linearity
Drift
Full Scale Error
Drift
Unipolar Offset
Drift
Bipolar Offset
Drift
±1/4 ±1/2
±1/32
±1/4 ±1/2
±1/16
±1/4 ±1/2
±1/16
±1/4 ±1/2
±1/16
±1/4 ±1/2
±1/16
±1/4
±1/4
±1/4 ±1/2
±1/32
±1/4 ±1/2
±1/16
±1/4 ±1/2
±1/16
±1/4 ±1/2
±1/16
±1/4 ±1/2
±1/16
±1/4
±1/4
±1/4 ±1/2
LSB
12
∆LSB
12
±1/32
±1/4
±1/8
±1/2
LSB
12
∆LSB
12
±1/4 ±1/2
LSB
12
∆LSB
12
±1/16
±1/4 ±1/2
LSB
12
∆LSB
12
±1/16
±1/4 ±1/2
LSB
12
∆LSB
12
±1/16
±1/4
±1/4
LSB
12
∆LSB
12
Bipolar Negative Full-Scale Error(Note 1)
Drift
(Note 2)
Total Unadjusted Error
Drift
Peak Harmonic or
Spurious Noise
Full Scale, 1 kHz Input
Full Scale, 12 kHz Input
Total Harmonic Distortion
Signal-to-Noise Ratio
1 kHz, 0 dB Input
1 kHz, -60 dB Input
Noise
Unipolar Mode
Bipolar Mode
(Note 1)
72
(Note 3)
(Note 1)
(Note 2)
(Note 1)
84
84
Dynamic Performance (Bipolar Mode)
92
88
0.008
73
13
45
90
84
84
92
88
0.008
84
84
92
88
0.008
dB
dB
%
dB
dB
µV
rms
µV
rms
72
73
13
45
90
72
73
13
45
90
Notes: 1. Applies after calibration at any temperature within the specified temperature range.
2. Total drift over specified temperature range since calibration at power-up at 25 °C
3. Wideband noise aliased into the baseband. Referred to the input.
* Refer to
Parameter Definitions
(immediately following the pin descriptions at the end of this data sheet).
Specifications are subject to change without notice.
2
DS14F6
CS5012A
CS5012A ANALOG CHARACTERISTICS
(continued)
CS5012A-K
Parameter*
Specified Temperature Range
Min
Typ
0 to +70
25
100
(Note 4)
275
103
165
72
375
137
220
96
7.2
12.25
2.5
3.0
2.8
3.75
100
62.5
2.5
3.0
275
103
165
72
375
137
220
96
7.2
12.25
2.8
3.75
62.5
3.0
275
103
165
72
375
137
220
96
pF
pF
pF
pF
µs
µs
µs
µs
kHz
kHz
Max
CS5012A-B
Min
Typ
Max
CS5012-T
Min
Typ
Max
Units
°C
ns
ps
-40 to +85
25
100
-55 to +125
25
100
Analog Input
Aperture Time
Aperture Jitter
Input Capacitance
Unipolar Mode CS5012
CS5012A
Bipolar Mode CS5012
CS5012A
Conversion & Throughput
Conversion Time
Acquisition Time
Throughput
-7 (Notes 5 and 6)
-12
-7
-12
-7
-12
(Note 6)
(Note 6) 100
62.5
(Note 7)
12
-12
3
6
-3
(Note 7)
(Note 8)
84
84
84
84
84
84
dB
dB
150
19
-19
6
7.5
-6
250
12
-12
3
6
-3
150
19
-19
6
7.5
-6
250
12
-12
3
-3
150
19
-19
6
-6
250
mA
mA
mA
mA
mA
mW
12.25
3.75
Power Supplies
DC Power Supply Currents
IA+
IA-
(CS5012)
ID+
(CS5012A)
ID+
ID-
Power Dissipation
Power Supply Rejection
Positive Supplies
Negative Supplies
Notes: 4. Applies only in track mode. When converting or calibrating, input capacitance will not exceed 15 pF.
5. Measured from falling transition on HOLD to falling transition on EOC.
6. Conversion, acquisition, and throughput times depend on CLKIN, sampling, and calibration conditions.
The numbers shown assume sampling and conversion is synchronized with the CS5012A/14/16 ’s
conversion clock, interleave calibrate is disabled, and operation is from the full-rated, external clock.
Refer to the section
Conversion Time/Throughput
for a detailed discussion of conversion timing.
7. All outputs unloaded. All inputs CMOS levels.
8. With 300 mV p-p, 1 kHz ripple applied to each analog supply separately in bipolar mode. Rejection
improves by 6 dB in the unipolar mode to 90 dB. Figure 13 shows a plot of typical power supply
rejection versus frequency.
DS14F6
3
CS5014
CS5014 ANALOG CHARACTERISTICS
(T
A
= T
MIN
to T
MAX
; VA+, VD+ = 5V;
VA-, VD- = -5V; VREF = 4.5V; CLKIN = 4 MHz for -14, 2 MHz for -28; Analog Source Impedance = 200Ω)
CS5014-K
Parameter*
Specified Temperature Range
Min
Typ
0 to +70
(Note 1)
(Note 2)
(Note 1)
(Note 2)
(Note 1)
(Note 2)
K, B, T
S
K, B, T
S
(Note 1)
(Note 2)
(Note 1)
(Note 2)
±1/4
±1/8
±1/4 ±1/2
±1/32
±1/2
±1/4
±1/4
±1/4
±1/4
±1/4
±1/2
±1/4
±1
±1/2
±1
±3/4
±1
±3/4
±1/2
Max
CS5014-B
Min
Typ
Max
CS5014-S, T
Min
Typ
Max
Units
°C
LSB
14
LSB
14
∆LSB
14
-40 to +85
±1/4
±1/8
±1/4 ±1/2
±1/32
±1/2
±1/4
±1/4
±1/4
±1/4
±1/2
±1/2
±1/4
±1
±1
±1
±3/4
±1
±3/4
±1/2
-55 to +125
±1/4
±1/2
±1/8
±1/2
±1.5
Accuracy
Linearity Error
Drift
Differential Linearity
Drift
Full Scale Error
Drift
Unipolar Offset
Drift
Bipolar Offset
Drift
K, B, T
S
±1/4 ±1/2
LSB
14
∆LSB
14
±1/32
±1/2
±1/2
±1/4
±1/2
±1/4
±1/2
±1/2
±1/2
±1
±1
±1
±3/4
±1
±3/4
±1
LSB
14
∆LSB
14
LSB
14
LSB
14
∆LSB
14
LSB
14
LSB
14
∆LSB
14
LSB
14
LSB
14
∆LSB
14
LSB
14
∆LSB
14
Bipolar Negative Full-Scale Error(Note 1)
K, B, T
S
Drift
(Note 2)
Total Unadjusted Error
Drift
Peak Harmonic or
Spurious Noise
Full Scale, 1 kHz Input
Full Scale, 12 kHz Input
Total Harmonic Distortion
Signal-to-Noise Ratio
1 kHz, 0 dB Input
1 kHz, -60 dB Input
Noise
Unipolar Mode
Bipolar Mode
(Note 3)
(Notes 1 and 9)
K, B, T
S
82
(Note 1)
(Note 2)
(Note 1)
K, B, T
S
K, B, T
S
94
84
±1
±1.5
Dynamic Performance (Bipolar Mode)
98
87
0.003
84
23
45
90
94
84
98
87
0.003
94
85
84
80
98
87
0.003
dB
dB
dB
dB
%
dB
dB
dB
µV
rms
µV
rms
82
84
23
45
90
82
80
84
23
45
90
Notes: 9. A detailed plot of S/(N+D) vs. input amplitude appears in Figure 26 for the CS5014 and Figure 28
for the CS5016.
* Refer to
Parameter Definitions
(immediately following the pin descriptions at the end of this data sheet).
Specifications are subject to change without notice.
4
DS14F6
CS5014
CS5014 ANALOG CHARACTERISTICS
(continued)
CS5014-K
Parameter*
Specified Temperature Range
Min
Typ
0 to +70
25
100
(Note 4)
275
165
-14 (Notes 5 and 6)
-28
-14
-28
-14
-28
(Note 6)
(Note 6) 55.6
27.7
(Note 7)
9
-9
3
-3
(Note 7)
(Note 8)
84
84
84
84
84
84
dB
dB
120
19
-19
6
-6
250
9
-9
3
-3
120
19
-19
6
-6
250
9
-9
3
-3
120
19
-19
6
-6
250
mA
mA
mA
mA
mW
3.0
4.5
375
220
14.25
28.5
3.75
5.25
55.6
27.7
3.0
4.5
275
165
375
220
14.25
28.5
3.75
5.25
55.6
27.7
3.0
4.5
275
165
375
220
14.25
28.5
3.75
5.25
pF
pF
µs
µs
µs
µs
kHz
kHz
Max
CS5014-B
Min
Typ
Max
CS5014-S, T
Min
Typ
Max
Units
°C
ns
ps
-40 to +85
25
100
-55 to +125
25
100
Analog Input
Aperture Time
Aperture Jitter
Input Capacitance
Unipolar Mode
Bipolar Mode
Conversion & Throughput
Conversion Time
Acquisition Time
Throughput
Power Supplies
DC Power Supply Currents
IA+
IA-
ID+
ID-
Power Dissipation
Power Supply Rejection
Positive Supplies
Negative Supplies
DS14F6
5
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