Rainbow Electronics MAX1183 User Manual

General Description

The MAX1183 is a +3V, dual 10-bit analog-to-digital
converter (ADC) featuring fully differential wideband
track-and-hold (T/H) inputs, driving two pipelined, nine­stage ADCs. The MAX1183 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 120mW while delivering a typi­cal signal-to-noise ratio (SNR) of 59.6dB at an input fre­quency of 20MHz and a sampling rate of 40Msps. 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 MAX1183 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 this internal or an externally
derived reference, if desired for applications requiring
increased accuracy or a different input voltage range.

The MAX1183 features parallel, CMOS-compatible
three-state outputs. The digital output format can be 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 MAX1183 is available in a 7mm ✕7mm, 48­pin TQFP package, and is specified for the extended
industrial (-40°C to +85°C) temperature range.

Pin-compatible lower and higher speed versions of the
MAX1183 are also available. Refer to the MAX1180
data sheet for 105Msps, the MAX1181 data sheet for
80Msps, the MAX1182 data sheet for 65Msps, and the
MAX1184 data sheet for 20Msps. In addition to these
speed grades, this family includes a multiplexed output
version, for which digital data is presented time-inter­leaved and on a single, parallel 10-bit output port.

Applications

High-Resolution Imaging

I/Q Channel Digitization

Multichannel IF Sampling

Instrumentation

Video Application

Ultrasound

Features

♦ Single +3V Operation

♦ Excellent Dynamic Performance

59.6dB SNR at f

IN

= 20MHz

73dB SFDR at f

IN

= 20MHz

♦ Low Power

40mA (Normal Operation)

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

♦ 0.02dB Gain and 0.25° Phase Matching

♦ Wide ±1Vp-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 Paddle for

Improved Thermal Dissipation

MAX1183

Dual 10-Bit, 40Msps, +3V, Low-Power ADC with

Internal Reference and Parallel Outputs

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

Ordering Information

19-2173; Rev 0; 9/01

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.

Functional Diagram appears at end of data sheet.

PART TEMP. RANGE PIN-PACKAGE

MAX1183ECM -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

MAX1183

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

MAX1183

Dual 10-Bit, 40Msps, +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 with respect to COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 40MHz, TA= 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, OVDDto 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,

COM, CLK 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 = 7.51MHz ±0.5 ±1.5 LSB

Differential Nonlinearity DNL fIN = 7.51MHz, no missing codes guaranteed ±0.25 ±1.0 LSB

Offset Error <±1 ±1.7 % FS

Gain Error 0 ±2 % FS

ANALOG INPUT

Differential Input Voltage Range V

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 SINAD

Spurious-Free Dynamic Range SFDR

Third-Harmonic Distortion HD3

Intermodulation Distortion IMD

Total Harmonic Distortion
(First 4 Harmonics)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DIFF

V

CM

CLK

= 40MHz, 4096-point FFT)

CLK

THD

Differential or single-ended inputs ±1.0 V

Switched capacitor load 50 kΩ

IN

IN

f

= 7.51MHz, TA = +25°C 57.3 59.6

INA or B

f

= 20MHz, TA = +25°C 56.8 59.6

INA or B

f

= 7.51MHz, TA = +25°C 57 59.4

INA or B

= 20MHz, TA = +25°C 56.5 59

f

INA or B

f

= 7.51MHz, TA = +25°C6576

INA or B

= 20MHz, TA = +25°C6573

f

INA or B

f

= 7.51MHz -76

INA or B

= 20MHz -73

f

INA or B

= 11.6066MHz at -6.5dB FS,

f

INA or B

f

= 13.3839MHz at -6.5dB FS

INA or B

(Note 2)

f

= 7.51MHz, TA = +25°C -73 -64

INA or B

= 20MHz, TA = +25°C -73 -63

f

INA or B

VDD/2

±0.5

5pF

40 MHz

-78 dBc

V

Clock

Cycles

dB

dB

dBc

dB

dBc

MAX1183

Dual 10-Bit, 40Msps, +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 with respect to COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 40MHz, TA= T

MIN

to

T

MAX

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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 Degrees

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

Maximum REFP, COM
Source Current

Maximum REFP, COM
Sink Current

Maximum REFN Source Current I

Maximum REFN Sink Current I

UNBUFFERED EXTERNAL REFERENCE (V

REFP, REFN Input Resistance

Differential Reference Input
Voltage Range

COM Input Voltage Range V

REFP Input Voltage V

REFN Input Voltage V

AD

AJ

TC

REF

= +2.048V)

REFIN

REFIN

V

REFP

V

REFN

∆V

REF

REFIN

I

SOURCE

I

SINK

SOURCE

SINK

R

REFP

R

REFN

∆V

REF

COM

REFP

REFN

∆V

= V

REF

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

REFIN

,

Measured between REFP and COM and

REFP

- V

REFN

REFN and COM

∆V

REF

= V

REFP

- V

REFN

1ns

2ps

2.048
±3%

60

ppm/

2.048 V

2.012 V

0.988 V

0.98 1.024 1.07 V

>50 MΩ

5mA

-250 µA

250 µA

-5 mA

4kΩ

1.024
±10%

VDD/2
±10%

V

+

COM

/2

∆V

REF

V

-

COM

/2

∆V

REF

RMS

RMS

V

°C

V

V

V

V

MAX1183

Dual 10-Bit, 40Msps, +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 with respect to COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 40MHz, TA= T

MIN

to

T

MAX

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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 Leakage
Capacitance

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 PSRR

TIMING CHARACTERISTICS

CLK Rise to Output Data Valid t

Output Enable Time t

Output Disable Time t

CLK

IH

PD, OE, SLEEP, T/B

OV

CLK

IL

PD, OE, SLEEP, T/B

HYST

I

I

LEAK

C

OUT

VDD

IH

IL

OL

OH

DD

VIH = OV

or VDD (CLK) ±5

DD

VIL = 0 ±5

IN

I

= -200µA 0.2 V

SINK

OV

DD

I

OE = OV

OE = OV

SOURCE

= 200µA

DD

DD

Operating, f

= 20MHz at -0.5dB FS 40 60

INA or B

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

DD

Operating, CL = 15pF,

= 20MHz at -0.5dB FS

f

OVDD

INA or B

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

Operating, f

= 20MHz at -0.5dB FS 120 180

INA or B

DD

Sleep mode 8.4
Shutdown, clock idle, PD = OE = OV

DD

Offset ±0.2 mV/V

Gain ±0.1 %V

DO

ENABLE

DISABLE

Figure 3 (Note 3) 5 8 ns

Figure 4 10 ns

Figure 4 1.5 ns

0.8 x
V

DD

0.8 x

DD

0.2 x
V

DD

0.2 x

OV

DD

0.1 V

5pF

DD

- 0.2

±10 µA

5pF

2.7 3 3.6 V

1.7 2.5 3.6 V

115µA

5.8 mA

210

345µW

V

V

µA

V

mA

µA

mW

MAX1183

Dual 10-Bit, 40Msps, +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 with respect to COM), CL= 10pF at digital outputs (Note 5), f

CLK

= 40MHz, TA= 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 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.

Typical Operating Characteristics

(VDD= +3V, OVDD= +2.5V, V

REFIN

= +2.048V, differential input at -0.5dB FS, f

CLK

= 40.0006MHz, CL≈ 10pF, TA= +25°C, unless

otherwise noted.)

-100

-80

-90

-60

-70

-40

-50

-30

-10

-20

0

0 4682 101214 1816 20

FFT PLOT CHA (DIFFERENTIAL INPUT,

8192-POINT DATA RECORD)

MAX1183 toc01

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHA

f

CLK

= 40.0005678MHz

f

INA

= 7.5342866MHz

f

INB

= 6.1475482MHz

AINA = -0.498dB FS

HD3

HD2

-100

-80

-90

-60

-70

-40

-50

-30

-10

-20

0

04682 101214 1816 20

FFT PLOT CHB (DIFFERENTIAL INPUT,

8192-POINT DATA RECORD)

MAX1183 toc02

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHB

f

CLK

= 40.0005678MHz

f

INB

= 6.1475482MHz

f

INA

= 7.524866MHz

AINB = -0.534dB FS

HD3

HD2

-100

-80

-90

-60

-70

-40

-50

-30

-10

-20

0

0 4682 101214 1816 20

FFT PLOT CHA (DIFFERENTIAL INPUT,

8192-POINT DATA RECORD)

MAX1183 toc03

ANALOG INPUT FREQUENCY (MHz)

AMPLITUDE (dB)

CHA

f

CLK

= 40.0005678MHz

f

INA

= 24.9661747MHz

f

INB

= 19.8879776MHz

AINA = -0.552dB FS

HD3

HD2

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

CH

CL

WAKE

Figure 3, clock period: 25ns

Figure 3, clock period: 25ns

Wake up from sleep mode (Note 4) 0.41

Wake up 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 Degrees

INA or B

12.5
±3.8

12.5
±3.8

ns

ns

µs

MAX1183

Dual 10-Bit, 40Msps, +3V, Low-Power ADC with
Internal Reference and Parallel Outputs

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD= +3V, OVDD= +2.5V, V

REFIN

= +2.048V, differential input at -0.5dB FS, f

CLK

= 40.0006MHz, CL≈ 10pF, TA= +25°C, unless

otherwise noted.)

FFT PLOT CHB (DIFFERENTIAL INPUT,

8192-POINT DATA RECORD)

0

f

= 40.0005678MHz

CLK

-10

= 24.9661747MHz

f

INA

= 19.8879776MHz

f

INB

-20

AINB = -0.525dB FS

-30

-40

-50

-60

AMPLITUDE (dB)

-70

HD2

-80

-90

-100
04682 101214 1816 20

ANALOG INPUT FREQUENCY (MHz)

TWO-TONE IMD PLOT (DIFFERENTIAL INPUT,

8192-POINT DATA RECORD)

MAX1183 toc04

0

f

= 40.0005678MHz

CLK

-10

= 11.606610MHz

f

IN1

= 13.383979MHz

f

IN2

-20

AIN = -6.5dB FS

-30

TWO-TONE ENVELOPE =

-0.525dB FS

-40

-50

-60

AMPLITUDE (dB)

-70

-80

-90

-100

IMD2

IMD3

0 4682 101214 1816 20

ANALOG INPUT FREQUENCY (MHz)

CHB

HD3

SIGNAL-TO-NOISE RATIO vs.

ANALOG INPUT FREQUENCY

61

60

IMD2

MAX1183 toc05

59

58

SNR (dB)

57

56

55

1 10 100

ANALOG INPUT FREQUENCY (MHz)

CHB

f

IN2

f

IN1

IMD3

CHA

MAX1183 toc06

SIGNAL-TO-NOISE + DISTORTION vs.

ANALOG INPUT FREQUENCY

62

60

58

SINAD (dB)

56

54

1 10 100

ANALOG INPUT FREQUENCY (MHz)

CHB

FULL-POWER INPUT BANDWIDTH vs.

ANALOG INPUT FREQUENCY, SINGLE-ENDED

6

4

2

0

GAIN (dB)

-2

-4

-6

CHA

MAX1183 toc07

MAX1183 toc10

TOTAL HARMONIC DISTORTION vs.

ANALOG INPUT FREQUENCY

-65

-68

-71

THD (dBc)

-74

-77

-80

1 10 100

ANALOG INPUT FREQUENCY (MHz)

CHB

CHA

SMALL-SIGNAL INPUT BANDWIDTH vs.

ANALOG INPUT FREQUENCY, SINGLE-ENDED

6

4

2

0

GAIN (dB)

-2

-4

-6

VIN = 100mVp-p

MAX1183 toc08

MAX1183 toc11

SPURIOUS-FREE DYNAMIC RANGE vs.

ANALOG INPUT FREQUENCY

80

76

72

SFDR (dBc)

68

64

60

1 10 100

ANALOG INPUT FREQUENCY (MHz)

CHA

CHB

SIGNAL-TO-NOISE RATIO vs.

65

60

55

50

SNR (dB)

45

40

INPUT POWER (f

= 19.8879776MHz)

IN

MAX1183 toc09

MAX1183 toc12

-8
1 10 100 1000

ANALOG INPUT FREQUENCY (MHz)

-8
1 10 100 1000

ANALOG INPUT FREQUENCY (MHz)

35

-20 0
INPUT POWER (dB FS)

-12-16 -8 -4