Rainbow Electronics MAX1182 User Manual

General Description

The MAX1182 is a +3V, dual 10-bit analog-to-digital
converter (ADC) featuring fully-differential wideband
track-and-hold (T/H) inputs, driving two pipelined, 9­stage ADCs. The MAX1182 is optimized for low-power,
high-dynamic performance applications in imaging,
instrumentation and digital communication applications.
This ADC operates from a single +2.7V to +3.6V sup­ply, consuming only 195mW while delivering a typical
signal-to-noise ratio (SNR) of 59dB at an input frequen­cy of 20MHz and a sampling rate of 65Msps. The T/H
driven input stages incorporate 400MHz (-3dB) input
amplifiers. The converters may also be operated with
single-ended inputs. In addition to low operating power,
the MAX1182 features a 2.8mA sleep mode as well as a
1µA power-down mode to conserve power during idle
periods.

An internal +2.048V precision bandgap reference sets
the full-scale range of the ADC. A flexible reference
structure allows the use of the internal or an externally
derived reference, if desired for applications requiring
increased accuracy or a different input voltage range.

The MAX1182 features parallel, CMOS-compatible
three-state outputs. The digital output format is set to
two’s complement or straight offset binary through a
single control pin. The device provides for a separate
output power supply of +1.7V to +3.6V for flexible inter­facing. The MAX1182 is available in a 7mm x 7mm, 48­pin TQFP package, and is specified for the extended
industrial (-40°C to +85°C) temperature range.

Pin-compatible higher and lower speed versions of the
MAX1182 are also available. Please refer to the
MAX1180 datasheet for 105Msps, the MAX1181
datasheet for 80Msps, the MAX1183 datasheet for
40Msps, and the MAX1184 datasheet for 20Msps. In
addition to these speed grades, this family includes a
20Msps multiplexed output version (MAX1185), for
which digital data is presented time-interleaved on a
single, parallel 10-bit output port.

Applications

High Resolution Imaging

I/Q Channel Digitization

Multchannel IF Undersampling

Instrumentation

Video Application

Features

♦ Single +3V Operation
♦ Excellent Dynamic Performance:

59dB SNR at f

IN

= 20MHz

77dB SFDR at f

IN

= 20MHz

♦ Low Power:

65mA (Normal Operation)

2.8mA (Sleep Mode)
1µA (Shutdown Mode)

♦ 0.02dB Gain and 0.25° Phase Matching (typ)
♦ Wide ±1V

P-P

Differential Analog Input Voltage

Range

♦ 400MHz -3dB Input Bandwidth
♦ On-Chip +2.048V Precision Bandgap Reference
♦ User-Selectable Output Format—Two’s

Complement or Offset Binary

♦ 48-Pin TQFP Package with Exposed Pad for

Improved Thermal Dissipation

♦ Evaluation Kit Available

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with

Internal Reference and Parallel Outputs

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

19-2094; Rev 0; 7/01

Ordering Information

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP. RANGE PIN-PACKAGE

MAX1182ECM -40°C to +85°C 48 TQFP-EP

REFN

REFP

REFIN

REFOUT

D9A

D8A

D7A

D6A

D5A

D4A

D3A

D2A

COM

V
GND
INA+
INA-

V
GND
INB­INB+
GND

V

CLK

4847464544434241403938

1

2

DD

3

4

5

6

DD

7

8

9

10

11

DD

12

1314151617181920212223

DD

V

GND

MAX1182

DD

T/B

V

GND

48 TQFP-EP

SLEEP

OE

PD

D9B

D8B

D7B

37

24

D6B

36

D1A
D0A

35

OGND

34

OV

33

DD

OV

32

DD

OGND

31

D0B

30

D1B

29

D2B

28

D3B

27

D4B

26

D5B

25

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +3V, OVDD= +2.5V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through
a 10kΩ resistor, V

IN

= 2Vp-p (differential w.r.t. COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 65MHz (50% duty cycle),

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°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.

VDD, OVDD to GND...............................................-0.3V to +3.6V

OGND to GND.......................................................-0.3V to +0.3V

INA+, INA-, INB+, INB- to GND ...............................-0.3V to V

DD

REFIN, REFOUT, REFP, REFN, CLK,

COM to GND ..........................................-0.3V to (V

DD

+ 0.3V)

OE, PD, SLEEP, T/B, D9A–D0A,

D9B–D0B to OGND .............................-0.3V to (OV

DD

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

48-Pin TQFP (derate 12.5mW/°C above +70°C).......1000mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Lead temperature (soldering, 10s) ..................................+300°C

DC ACCURACY

Resolution 10 Bits

Integral Nonlinearity INL fIN = 7.47MHz ±0.6 ±1.9 LSB

Differential Nonlinearity DNL fIN = 7.47MHz, no missing codes guaranteed ±0.4 ±1.0 LSB
Offset Error < ±1 ±1.7 % FS
Gain Error 0 ±2 % FS

ANALOG INPUT

Differential Input Voltage
Range

Common-Mode Input Voltage
Range

Input Resistance R

Input Capacitance C

CONVERSION RATE

Maximum Clock Frequency f

Data Latency 5

DYNAMIC CHARACTERISTICS (f

Signal-to-Noise Ratio SNR

Signal-to-Noise and Distortion
(up to 5th harmonic)

Spurious-Free Dynamic Range SFDR

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

DIFF

V

CLK

= 65MHz, 4096-point FFT)

CLK

SINAD

Differential or single-ended inputs ±1.0 V

CM

Switched capacitor load 33 kΩ

IN

IN

f

= 7.47MHz, TA = +25°C 56.8 59.5

INA or B

f

= 20MHz, TA = +25°C 56.5 59

INA or B

= 39.9MHz (Note 1) 59

f

INA or B

f

= 7.47MHz, TA = +25°C 56.5 59

INA or B

f

= 20MHz, TA = +25°C 56 58.5

INA or B

= 39.9MHz (Note 1) 58.5

f

INA or B

f

= 7.47MHz, TA = +25°C6576

INA or B

f

= 20MHz, TA = +25°C6577

INA or B

= 39.9MHz, (Note 1) 75

f

INA or B

VDD/2

± 0.5

5pF

65 MHz

V

Clock

Cycles

dB

dB

dBc

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with

Internal Reference and Parallel Outputs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +3V, OVDD= +2.5V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through
a 10kΩ resistor, V

IN

= 2Vp-p (differential w.r.t. COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 65MHz (50% duty cycle),

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Intermodulation Distortion
(first 5 odd-order IMDs)

Total Harmonic Distortion
(first 5 harmonics)

Small-Signal Bandwidth Input at -20dB FS, differential inputs 500 MHz

Full-Power Bandwidth FPBW Input at -0.5dB FS, differential inputs 400 MHz

Aperture Delay t

Aperture Jitter t

Overdrive Recovery Time For 1.5 x full-scale input 2 ns
Differential Gain ±1%
Differential Phase ±0.25 d egr ees

Output Noise INA+ = INA- = INB+ = INB- = COM 0.2 LSB

INTERNAL REFERENCE

Reference Output Voltage REFOUT

Reference Temperature
Coefficient

Load Regulation 1.25 mV/mA

BUFFERED EXTERNAL REFERENCE (V

REFIN Input Voltage V

Positive Reference Output
Voltage

Negative Reference Output
Voltage

Differential Reference Output
Voltage Range

REFIN Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

f

= 7.47MHz -83

INA or B

f

= 20MHz -82Third-Harmonic Distortion HD3

INA or B

= 39.9MHz (Note 1) -77

f

INA or B

f

= 19.13042MHz at -6.5dB FS

REF

REFIN

REF

INA or B

f

= 21.2886M H z at - 6.5d B FS ( N ote 2)

I N A o r B

f

= 7.47MHz, TA = +25°C -75.5 -64

INA or B

f

= 20MHz, TA = +25°C -76 -63

INA or B

= 39.9MHz, (Note 1) -74

f

INA or B

= +2.048V)

∆V

REF

= V

REFP

- V

REFN

IMD

THD

TC

REFIN

V

REFP

V

REFN

∆V

REFIN

AD

AJ

dBc

-75 dBc

dBc

1ns

2ps

2.048

±3%

60 ppm/°C

2.048 V

2.012 V

0.988 V

0.98 1.024 1.07 V

>50 MΩ

RMS

RMS

V

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +3V, OVDD= +2.5V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through
a 10kΩ resistor, V

IN

= 2Vp-p (differential w.r.t. COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 65MHz (50% duty cycle),

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Maximum REFP, COM Source
Current

Maximum REFP, COM Sink
Current

Maximum REFN Source Current I

Maximum REFN Sink Current I

UNBUFFERED EXTERNAL REFERENCE

REFP, REFN Input Resistance

Differential Reference Input
Voltage

COM Input Voltage V

REFP Input Voltage V

REFN Input Voltage V

DIGITAL INPUTS (CLK, PD, OE, SLEEP, T/B)

Input High Threshold V

Input Low Threshold V

Input Hysteresis V

Input Leakage

Input Capacitance C

DIGITAL OUTPUTS (D9A–D0A, D9B–D0B)

Output Voltage Low V

Output Voltage High V

Three-State Leakage Current I

Three-State Output Capacitance C

I

SOURCE

I

SINK

SOURCE

SINK

= AGND, reference voltage applied to REFP, REFN, and COM)

REFIN

Measured between REFP and COM, and
REFN and COM

∆V

REF

= V

REFP

– V

REFN

CL K 0.8 x V
PD, OE, SLEEP, T/B 0.8 x OV

CL K 0.2 x V
PD, OE, SLEEP, T/B 0.2 x OV

VIH = OV

DD

or V

(CLK) ±5

DD

VIL = 0 ±5

I

= 200µA 0.2 V

SINK

I

OE = OV
OE = OV

= 200µA OVDD - 0.2 V

SOURCE

DD

DD

R
R

∆V

LEAK

REFP

REFN

REF

COM

REFP

REFN

IH

IL

HYST

I

IH

I

IL

IN

OL

OH

OUT

(V

,

>5 mA

250 µA

250 µA

>5 mA

4kΩ

1.024
±10%

VDD/2
± 10%

V

+

COM

/2

∆V

REF

V

-

COM

∆V

/2

REF

DD

DD

DD

DD

0.1 V

5pF

±10 µA

5pF

V

V

V

V

V

V

µA

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with

Internal Reference and Parallel Outputs

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +3V, OVDD= +2.5V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM to GND; REFOUT connected to REFIN through
a 10kΩ resistor, V

IN

= 2Vp-p (differential w.r.t. COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 65MHz (50% duty cycle),

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Note 1: SNR, SINAD, THD, SFDR, and HD3 are based on an analog input voltage of -0.5dB FS referenced to a +1.024V full-scale

input voltage range.

Note 2: Intermodulation distortion is the total power of the intermodulation products relative to the individual carrier. This number is

6dB or better, if referenced to the two-tone envelope.

Note 3: Digital outputs settle to V

IH

, VIL. Parameter guaranteed by design.

Note 4: With REFIN driven externally, REFP, COM, and REFN are left floating while powered down.
Note 5: Equivalent dynamic performance is obtainable over full OV

DD

range with reduced CL.

POWER REQUIREMENTS

Analog Supply Voltage Range V

Output Supply Voltage Range OV

Analog Supply Current I

Output Supply Current I

Power Dissipation PDISS

Power-Supply Rejection Ratio PSRR

TIMING CHARACTERISTICS

CLK Rise to Output Data Valid t

Output Enable Time t

Output Disable Time t

CLK Pulse Width High t

CLK Pulse Width Low t

Wake-Up Time t

CHANNEL-TO-CHANNEL MATCHING

Crosstalk f

Gain Matching f

Phase Matching f

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DD

DD

VDD

OVDD

DO

ENABLE

DISABLE

CH

CL

WAKE

Operating, f

Sleep mode 2.8
Shutdown, clock idle, PD = OE = OV

Operating, CL = 15pF, f

-0.5dB FS

Sleep mode 100
Shutdown, clock idle, PD = OE = OV

Operating, f

Sleep mode 8.4
Shutdown, clock idle, PD = OE = OV
Offset ±0.2 mV/V
Gain ±0.1 %/V

Figure 3 (Note 3) 5 8 ns

Figure 4 10 ns

Figure 4 1.5 ns

Figure 3, clock period: 15.4ns

Figure 3, clock period: 15.4ns

Wakeup from Sleep mode (Note 4) 0.42

Wakeup from Shutdown (Note 4) 1.5

= 20MHz at -0.5dB FS -70 dB

INA or B

= 20MHz at -0.5dB FS 0.02 ±0.2 dB

INA or B

= 20MHz at -0.5dB FS 0.25 d eg r ees

INA or B

= 20MHz at -0.5dB FS 65 80

INA or B

= 20MHz at

INA or B

= 20MHz at -0.5dB FS 195 240

INA or B

DD

DD

DD

2.7 3.0 3.6 V

1.7 2.5 3.6 V

mA

115µA

11 mA

210

mW

345µW

7.7 ± 1.5

7.7 ± 1.5

µA

ns

ns

µs

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs

6 _______________________________________________________________________________________

Typical Operating Characteristics

(VDD= +3V, OVDD= +2.5V, internal reference, differential input at -0.5dB FS, f

CLK

= 65MHz, CL≈ 10pF, TA= +25°C, unless otherwise

noted.)

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

FFT PLOT CHA (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc01

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHA

f

INA

= 6.0065MHz

f

INB

= 7.51410MHz

f

CLK

= 65.00057MHz

AINA = -0.55dB FS

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

FFT PLOT CHB (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc02

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHB

f

INA

= 6.0065MHz

f

INB

= 7.51410MHz

f

CLK

= 65.00057MHz

AINB = -0.56dB FS

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

FFT PLOT CHA (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc03

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHA

f

INA

= 20.08257MHz

f

INB

= 25.09727MHz

f

CLK

= 65.00057MHz

AINB = -0.52dB FS

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

FFT PLOT CHB (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc04

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHB

f

INA

= 20.08257MHz

f

INB

= 25.09727MHz

f

CLK

= 65.00057MHz

AINB = -0.52dB FS

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

FFT PLOT CHA (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc05

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHA

f

INA

= 37.31661MHz

f

INB

= 46.99687MHz

f

CLK

= 65.00057MHz

AINB = -0.52dB FS

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

FFT PLOT CHB (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc06

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHB

f

INA

= 37.31661MHz

f

INB

= 46.99687MHz

f

CLK

= 65.00057MHz

AINB = -0.49dB FS

-100

-70

-80

-90

-50

-60

-10

-20

-30

-40

0

0 5 10 15 20 25 30 35

TWO-TONE IMD PLOT (8192-POINT RECORD,

DIFFERENTIAL INPUT)

MAX1182 toc07

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

f

IN1

f

IN1

= 19.13042MHz

f

IN2

= 21.28864MHz

f

CLK

= 65.00057MHz
AIN = -6.5dB FS
TWO-TONE ENVELOPE
= -0.47dB FS

f

IN2

2nd ORDER IMD

3rd ORDER IMD

SIGNAL-TO-NOISE RATIO

vs. ANALOG INPUT FREQUENCY

MAX1182 toc08

ANALOG INPUT FREQUENCY (MHz)

SNR (dB)

61

55

56

57

58

59

60

110100

CHA

CHB

DIFFERENTIAL INPUT CONFIGURATION

62

54

56

58

60

SIGNAL-TO-NOISE + DISTORTION

vs. ANALOG INPUT FREQUENCY

MAX1182 toc09

ANALOG INPUT FREQUENCY (MHz)

SINAD (dB)

110100

CHA

CHB

DIFFERENTIAL INPUT CONFIGURATION

MAX1182

Dual 10-Bit, 65Msps, +3V, Low-Power ADC with

Internal Reference and Parallel Outputs

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(VDD= +3V, OVDD= +2.5V, internal reference, differential input at -0.5dB FS, f

CLK

= 65MHz, CL≈ 10pF, TA= +25°C, unless otherwise

noted.)

THD (dB)

GAIN (dB)

TOTAL HARMONIC DISTORTION

vs. ANALOG INPUT FREQUENCY

-65
DIFFERENTIAL INPUT

CONFIGURATION

-68

-71

-74

-77

-80

110100

CHA

ANALOG INPUT FREQUENCY (MHz)

CHB

MAX1182 toc10

SFDR (dB)

SMALL-SIGNAL INPUT BANDWIDTH

vs. ANALOG INPUT FREQUENCY, SINGLE-ENDED

6

AIN = 100mV

4

2

0

-2

-4

-6

P-P

MAX1182 toc13

SPURIOUS-FREE DYNAMIC RANGE

vs. ANALOG INPUT FREQUENCY

87

DIFFERENTIAL INPUT
CONFIGURATION

83

79

75

71

67

63

110100

ANALOG INPUT FREQUENCY (MHz)

SIGNAL-TO-NOISE RATIO

vs. INPUT POWER (f

65

60

55

50

SNR (dB)

45

40

= 20.085279MHz)

IN

FULL-POWER INPUT BANDWIDTH

vs. ANALOG INPUT FREQUENCY, SINGLE-ENDED

6

CHA

CHB

MAX1182 toc11

GAIN (dB)

4

2

0

-2

-4

-6

-8
1 100 100010

ANALOG INPUT FREQUENCY (MHz)

SIGNAL-TO-NOISE + DISTORTION

= 20.085279MHz)

IN

MAX1182 toc14

SINAD (dB)

vs. INPUT POWER (f

65

60

55

50

45

40

MAX1182 toc12

MAX1182 toc15

-8
1 100 100010

ANALOG INPUT FREQUENCY (MHz)

TOTAL HARMONIC DISTORTION

vs. INPUT POWER (f

-55

-60

-65

THD (dB)

-70

-75

-80

-20 -12-16 -8 -4 0
INPUT POWER (dB FS)

= 20.085279MHz)

IN

MAX1182 toc16

35

-20 -12-16 -8 -4 0
INPUT POWER (dB FS)

SPURIOUS-FREE DYNAMIC RANGE

vs. INPUT POWER (f

80

76

72

SFDR (dB)

68

64

60

-20 -12-16 -8 -4 0
INPUT POWER (dB FS)

= 20.085279MHz)

IN

MAX1182 toc17

35

-20 -12-16 -8 -4 0
INPUT POWER (dB FS)

INTEGRAL NONLINEARITY

1.0

0.5

0

INL (LSB)

-0.5

-1.0

(BEST-ENDPOINT FIT)

0 256 384128 512 640 768 896 1024

DIGITAL OUTPUT CODE

MAX1182 toc18