19-1189; Rev 0; 3/97
IT
TION K
VALUA
E
BLE
AVAILA
10-Bit, 20Msps, TTL-Output ADC
____________________________Features
o
Monolithic 20Msps Converter
o
On-Chip Track/Hold
o
Bipolar, ±2V Analog Input
o
60dB SNR at 1MHz Input
o
5pF Input Capacitance
o
TTL Outputs
_______________General Description
The MAX1160 10-bit, monolithic analog-to-digital con-
verter (ADC) is capable of 20Msps minimum word
rates. An on-board track/hold ensures excellent dynam-
ic performance without the need for external compo-
nents. A 5pF input capacitance minimizes drive
requirement problems.
Inputs and outputs are TTL compatible. An overrange
output is provided to indicate overflow conditions. Output
data format is straight binary. Power dissipation is low at
only 1W with +5V and -5.2V power-supply voltages. The
MAX1160 also accepts wide ±2V input voltages.
The MAX1160 is available in 28-pin DIP and SO pack-
ages in the commercial temperature range.
MAX1160
________________________Applications
Medical Imaging
Professional Video
Radar Receivers
Instrumentation
Digital Communications
______________Ordering Information
PART
MAX1160ACPI
MAX1160BCPI
MAX1160ACWI
MAX1160BCWI
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
28 Wide Plastic DIP
28 Wide Plastic DIP
28 SO
28 SO
________________Functional Diagram
ANALOG
INPUT
4
COARSE
ADC
ANALOG
PRESCALER
__________________Pin Configuration
TOP VIEW
TOP VIEW
DGND
D0
D1
D2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 DV
CC
27 V
EE
26 AGND
25 V
CC
DECODING NETWORK
T/H
AMPLIFIER
BANK
D3
DIGITAL
OUTPUT
D4
D5
D6
D7
D8
D9
D10
DGND
DV
CC
MAX1160
24 VFB
23 VSB
22 VRM
21 VIN
20 VST
19 VFT
18 V
CC
17 AGND
16 V
EE
15 CLK
10
SUCCESSIVE INTERPOLATION
STAGE i
SUCCESSIVE INTERPOLATION
STAGE i + 1
.
.
.
.
SUCCESSIVE INTERPOLATION
STAGE N
DIP/SO
1
________________________________________________________________
Maxim Integrated Products
For the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
10-Bit, 20Msps, TTL-Output ADC
MAX1160
ABSOLUTE MAXIMUM RATINGS
V
CC ..........................................................................................................
6V
V
EE .........................................................................................................
-6V
Analog Input ......................................................VFB
≤
VIN
≤
VFT
VFT, VFB ...........................................................................3V, -3V
Reference-Ladder Current..................................................12mA
CLK Input...............................................................................V
CC
Digital Outputs.....................................................30mA to -30mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP ......................................................................1.14W
SO .......................................................................................1W
Operating Temperature Range...............................0°C to +70°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec). ............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= +5.0V, V
EE
= -5.2V, DV
CC
= +5.0V, V
IN
= ±2.0V, VSB = -2.0V, VST = +2.0V, f
CLK
= 20MHz, 50% clock duty cycle,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
Resolution
DC ACCURACY
(± full scale, 250kHz sample rate, T
A
= +25°C)
Integral Nonlinearity
Differential Nonlinearity
No Missing Codes
ANALOG INPUT
Input Voltage Range
Input Bias Current
Input Bias Current
Input Resistance
Input Resistance
Input Capacitance
Input Bandwidth
Positive Full-Scale Error
Negative Full-Scale Error
REFERENCE INPUT
Reference-Ladder
Resistance
Reference-Ladder
Tempco
TIMING CHARACTERISTICS
Maximum Conversion Rate
Overvoltage Recovery Time
Pipeline Delay (Latency)
Output Delay
Aperture Delay Time
Aperture Jitter Time
Acquisition Time
2
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
VI
V
VI
V
V
V
V
14
1
5
20
20
20
1
18
14
1
5
20
20
20
1
18
MHz
ns
Clock
Cycle
ns
ns
ps-RMS
ns
VI
V
500
800
0.8
500
800
0.8
Ω
Ω/°C
3dB small signal
T
A
= -55°C to +125°C
V
IN
= 0V
T
A
= -55°C to +125°C
VI
VI
VI
VI
VI
V
V
V
V
100
75
300
300
5
120
±2.0
±2.0
±2.0
30
60
75
100
75
300
300
5
120
±2.0
±2.0
±2.0
30
60
75
V
µA
µA
kΩ
kΩ
pF
MHz
LSB
LSB
I
I
±1.0
±0.5
Guaranteed
±1.5
±0.75
Guaranteed
LSB
LSB
CONDITIONS
TEST
LEVEL
MAX1160A
MIN
TYP
MAX
10
MAX1160B
MIN
TYP
MAX
10
UNITS
Bits
_______________________________________________________________________________________
10-Bit, 20Msps, TTL-Output ADC
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5.0V, V
EE
= -5.2V, DV
CC
= +5.0V, V
IN
= ±2.0V, VSB = -2.0V, VST = +2.0V, f
CLK
= 20MHz, 50% clock duty cycle,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
DYNAMIC PERFORMANCE
Effective Number of Bits
(ENOB)
f
IN
= 1MHz
f
IN
= 3.58MHz
f
IN
= 10MHz
T
A
= +25°C
f
IN
= 1MHz
Signal-to-Noise Ratio
(without harmonics)
(SNR)
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 3.58MHz
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 10MHz
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 1MHz
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 3.58MHz
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 10MHz
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 1MHz
Signal-to-Noise and
Distortion Ratio
(SINAD)
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 3.58MHz
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
f
IN
= 10MHz
Spurious-Free
Dynamic Range (SFDR)
Differential Phase
Differential Gain
T
A
= 0°C to +70°C,
T
A
= -25°C to +85°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
I
IV
I
IV
I
IV
I
IV
I
IV
I
IV
I
IV
I
IV
I
IV
V
V
V
57
55
56
54
50
47
57
54
56
53
46
45
55
52
54
51
44
43
67
0.2
0.5
47
55
9.2
8.8
7.5
60
58
58
56
53
50
60
57
58
55
48
47
57
54
52
53
51
47
44
54
51
53
50
43
42
52
49
51
48
41
40
67
0.2
0.7
dB
Degrees
%
44
52
dB
8.7
8.3
7.0
57
55
55
53
49
46
57
54
55
52
45
44
54
dB
dB
Bits
CONDITIONS
TEST
LEVEL
MAX1160A
MIN TYP MAX
MAX1160B
MIN TYP MAX
UNITS
MAX1160
Total Harmonic Distortion
(THD)
f
IN
= 1MHz
f
IN
= 3.58MHz
and 4.35MHz
f
IN
= 3.58MHz
and 4.35MHz
_______________________________________________________________________________________
3
10-Bit, 20Msps, TTL-Output ADC
MAX1160
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5.0V, V
EE
= -5.2V, DV
CC
= +5.0V, V
IN
= ±2.0V, VSB = -2.0V, VST = +2.0V, f
CLK
= 20MHz, 50% clock duty cycle,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
DIGITAL INPUTS
Logic 1 Voltage
Logic 0 Voltage
Maximum Input
Current Low
Maximum Input
Current High
Pulse Width Low (CLK)
Pulse Width High (CLK)
DIGITAL OUTPUTS
Logic 1 Voltage
Logic 0 Voltage
POWER-SUPPLY REQUIREMENTS
V
CC
Voltages
DV
CC
-V
EE
I
CC
Currents
Power Dissipation
Power-Supply Rejection
TEST LEVEL CODES
CONDITIONS
TEST
LEVEL
V
V
MAX1160A
MIN TYP MAX
2.4
4.5
0.8
0
0
20
20
2.4
0.6
4.75
4.75
5.0
118
40
40
1.0
1.0
-4.95 -5.2
5.25
5.25
145
55
57
1.3
300
5
5
20
20
MAX1160B
MIN TYP MAX
2.4
4.0
0.8
0
0
20
20
2.4
0.6
4.75
4.75
5.0
118
40
40
1.0
1.0
5.25
5.25
-5.45
145
55
57
1.3
300
5
5
20
20
UNITS
V
V
µA
µA
ns
ns
V
V
T
A
= +25°C
T
A
= +25°C
IV
IV
IV
IV
IV
IV
IV
IV
IV
VI
VI
VI
VI
V
V
-5.45 -4.95 -5.2
DI
CC
-I
EE
V
CC
= 5V ±0.25V, V
EE
= -5.2V ±0.25V
TEST LEVEL
I
II
III
IV
V
VI
mA
W
LSB
All electrical characteristics are subject to the following conditions:
All parameters having min/max specifications are guaranteed. The
Test Level column indicates the specific device testing actually per-
formed during production and Quality Assurance inspection. Any
blank section in the data column indicates that the specification is
not tested at the specified condition.
Unless otherwise noted, all tests are pulsed; therefore,
Tj = TC = TA.
TEST PROCEDURE
100% production tested at the specified temperature.
100% production tested at TA = +25°C, and sample tested at the specified
temperatures.
QA sample tested only at the specified temperatures.
Parameter is guaranteed (but not tested) by design and characterization data.
Parameter is a typical value for information purposes only.
100% production tested at TA = +25°C. Parameter is guaranteed over specified
temperature range.
______________________________________________________________Pin Description
PIN
1, 13
2
3–10
11
12
14, 28
15
16, 27
NAME
DGND
D0
D1–D8
D9
D10
DV
CC
CLK
V
EE
FUNCTION
Digital Ground
TTL Output (LSB)
TTL Outputs
TTL Output (MSB)
TTL Output Overrange
+5V Supply (digital)
Clock
-5.2V Supply (analog)
PIN
17, 26
18, 25
19
20
21
22
23
24
NAME
AGND
V
CC
VFT
VST
VIN
VRM
VSB
VFB
FUNCTION
Analog Ground
+5V Supply (analog)
Force for Top of Reference Ladder
Sense for Top of Reference Ladder
Analog Input
Middle of Voltage Reference Ladder
Sense for Bottom of Reference Ladder
Force for Bottom of Reference Ladder
4
_______________________________________________________________________________________
10-Bit, 20Msps, TTL-Output ADC
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
MAX1160
SIGNAL-TO-NOISE RATIO vs.
INPUT FREQUENCY
MAX1160-01
TOTAL HARMONIC DISTORTION vs.
INPUT FREQUENCY
MAX1160-02
SIGNAL-TO-NOISE AND DISTORTION
vs. INPUT FREQUENCY
f
S
= 20Msps
70
60
50
40
30
20
MAX1160-03
80
f
S
= 20Msps
70
60
SNR (dB)
80
f
S
= 20Msps
70
60
THD (dB)
50
40
30
20
80
50
40
30
20
1
10
INPUT FREQUENCY (MHz)
100
1
10
INPUT FREQUENCY (MHz)
100
SINAD (dB)
1
10
INPUT FREQUENCY (MHz)
100
SNR, THD, SINAD vs.
SAMPLE RATE
f
IN
= 1MHz
70
SNR, THD, SINAD (dB)
60
50
40
30
20
1
10
SAMPLE RATE (Msps)
100
SNR, THD
MAX1160-04
SNR, THD, SINAD vs.
TEMPERATURE
MAX1160-06
SPECTRAL RESPONSE
SNR
f
S
= 20Msps
f
IN
= 1MHz
-30
AMPLITUDE (dB)
MAX1160-05
80
65
SNR
SNR, THD, SINAD (dB)
60
55
THD
SINAD
50
THD
0
SINAD
-60
45
f
S
= 20Msps
f
IN
= 1MHz
40
-25
0
25
50
75
TEMPERATURE (°C)
-90
-120
0
1
2
3
4
5
6
7
8
9 10
INPUT FREQUENCY (MHz)
______________Detailed Description
The MAX1160 requires few external components to
achieve the stated operation and performance. Figure
2 shows the typical interface requirements when using
the MAX1160 in normal circuit operation. The following
section provides a description of the pin functions, and
outlines critical performance criteria to consider for
achieving the optimal device performance.
Power Supplies and Grounding
The MAX1160 requires -5.2V and +5V analog supply
voltages. The +5V supply is common to analog V
CC
and digital DV
CC
. A ferrite bead in series with each
supply line reduces the transient noise injected into the
analog V
CC
. Connect these beads as close to the
device as possible. The connection between the beads
and the MAX1160 should not be shared with any other
device. Bypass each power-supply pin as close to the
device as possible. Use 0.1µF for V
EE
and V
CC
, and
0.01µF for DV
CC
(chip capacitors are recommended).
_______________________________________________________________________________________
5
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