MAXIM MAX1193 Technical data

General Description

The MAX1193 is an ultra-low-power, dual, 8-bit,
45Msps analog-to-digital converter (ADC). The device
features two fully differential wideband track-and-hold
(T/H) inputs. These inputs have a 440MHz bandwidth
and accept fully differential or single-ended signals.
The MAX1193 delivers a typical signal-to-noise and dis­tortion (SINAD) of 48.5dB at an input frequency of

5.5MHz and a sampling rate of 45Msps while consum­ing only 57mW. This ADC operates from a 2.7V to 3.6V
analog power supply. A separate 1.8V to 3.6V supply
powers the digital output driver. In addition to ultra-low
operating power, the MAX1193 features three power­down modes to conserve power during idle periods.
Excellent dynamic performance, ultra-low power, and
small size make the MAX1193 ideal for applications in
imaging, instrumentation, and digital communications.

An internal 1.024V precision bandgap reference sets
the full-scale range of the ADC to ±0.512V. A flexible
reference structure allows the MAX1193 to use its inter­nal reference or accept an externally applied reference
for applications requiring increased accuracy.

The MAX1193 features parallel, multiplexed, CMOS­compatible tri-state outputs. The digital output format is
offset binary. A separate digital power input accepts a
voltage from 1.8V to 3.6V for flexible interfacing to dif­ferent logic levels. The MAX1193 is available in a 5mm
× 5mm, 28-pin thin QFN package, and is specified for
the extended industrial (-40°C to +85°C) temperature
range.

For higher sampling frequency applications, refer to the
MAX1195–MAX1198 dual 8-bit ADCs. Pin-compatible
versions of the MAX1193 are also available. Refer to the
MAX1191 data sheet for 7.5Msps, and the MAX1192
data sheet for 22Msps.

Applications

Ultrasound and Medical Imaging

IQ Baseband Sampling

Battery-Powered Portable Instruments

Low-Power Video

WLAN, Mobile DSL, WLL Receiver

Features

♦ Ultra-Low Power

57mW (Normal Operation: 45Msps)

0.3µW (Shutdown Mode)

♦ Excellent Dynamic Performance

48.5dB/48.3dB SNR at f

IN

= 5.5MHz/100MHz

70dBc/68dBc SFDR at f

IN

= 5.5MHz/100MHz

♦ 2.7V to 3.6V Single Analog Supply

♦ 1.8V to 3.6V TTL/CMOS-Compatible Digital

Outputs

♦ Fully Differential or Single-Ended Analog Inputs

♦ Internal/External Reference Option

♦ Multiplexed CMOS-Compatible Tri-State Outputs

♦ 28-Pin Thin QFN Package

♦ Evaluation Kit Available (Order MAX1193EVKIT)

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

Ordering Information

19-2794; Rev 1; 9/03

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.

*EP = Exposed paddle.

PART TEMP RANGE PIN-PACKAGE

MAX1193ETI-T -40°C to +85°C

28 Thin QFN-EP*
(5mm x 5mm)

TOP VIEW

DD

V

REFP

REFN

COM

REFIN

PD0

PD1

28

27

26

25

24

23

22

INA-

INA+

GND

CLK

GND

INB+

INB-

1

2

3

4

5

6

7

MAX1193

EXPOSED PADDLE

D0

21

20

D1

19

D2

18

D3

17

A/B

16

D4

D5

15

8

9

10

11

12

13

14

DD

DD

V

V

5mm x 5mm THIN QFN

GND

OGND

DD

D7

OV

D6

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, f

CLK

= 45MHz, C

REFP

= C

REFN

= C

COM

=

0.33µF, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

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

+ 0.3V)

CLK, REFIN, REFP, REFN, COM to GND ...-0.3V to (V

DD

+ 0.3V)

PD0, PD1 to OGND .................................-0.3V to (OV

DD

+ 0.3V)

Digital Outputs to OGND.........................-0.3V to (OV

DD

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

28-Pin Thin QFN (derated 20.8mW/°C above +70°C) ..1667mW

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

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

Storage Temperature Range .............................-65°C to +150°C

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

DC ACCURACY

Resolution 8 Bits
Integral Nonlinearity INL ±0.16 ±1.00 LSB
Differential Nonlinearity DNL No missing codes over temperature ±0.15 ±1.00 LSB

Offset Error

Gain Error Excludes REFP - REFN error ±2 %FS

DC Gain Matching ±0.01 ±0.2 dB

Gain Temperature Coefficient ±30 p p m /°C

Power-Supply Rejection

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

DYNAMIC CHARACTERISTICS (differential inputs, 4096-point FFT)

Signal-to-Noise Ratio
(Note 2)

Signal-to-Noise and Distortion
(Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

≥ +25°C ±4
< +25°C ±6

Offset (VDD ±5%) ±0.2

DIFF

V

COM

IN

IN

CLK

SNR

SINAD

Gain (V

Differential or single-ended inputs ±0.512 V

Switched capacitor load 120 kΩ

Channel A 5.0

Channel B 5.5

fIN = 3.75MHz 48.5

fIN = 5.5MHz 47 48.5

f

IN

fIN = 3.75MHz 48.5

fIN = 5.5MHz 47 48.5

f

IN

±5%) ±0.05

DD

= 22.5MHz 48.4

= 22.5MHz 48.4

VDD / 2 V

45 MHz

5pF

%FS

LSB

Clock

cycles

dB

dB

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, f

CLK

= 45MHz, C

REFP

= C

REFN

= C

COM

=

0.33µF, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Spurious-Free Dynamic Range
(Note 2)

Thi r d - H ar m oni c D i stor ti on
( N ote 2)

Intermodulation Distortion IMD

Third-Order Intermodulation IM3

Total Harmonic Distortion
(Note 2)

Small-Signal Bandwidth SSBW Input at -20dB FS 440 MHz

Full-Power Bandwidth FPBW Input at -0.5dB FS 440 MHz

Aperture Delay t

Aperture Jitter t
Overdrive Recovery Time 1.5 × full-scale input 2 ns

INTERNAL REFERENCE (REFIN = VDD; V

REFP Output Voltage V

REFN Output Voltage V

COM Output Voltage V

Differential Reference Output V

Differential Reference Output
Temperature Coefficient

Maximum REFP/REFN/COM
Source Current

Maximum REFP/REFN/COM Sink
Current

B U F FERED EXT ER N A L R EF ER EN C E ( V

REFIN Input Voltage V

COM Output Voltage V

Differential Reference Output V

Maximum REFP/REFN/COM
Source Current

fIN = 3.75MHz 70.7

SFDR

fIN = 5.5MHz 60.0 70.0

= 22.5MHz 71.5

f

IN

fIN = 3.75MHz -79.6

HD3

fIN = 5.5MHz -79.0

= 22.5MHz 76.1

f

IN

f

= 1MHz at -7dB FS, f

IN1

= 1.01MHz

IN2

at -7dB FS

f

= 1MHz at -7dB FS, f

IN1

= 1.01MHz

IN2

at -7dB FS

fIN = 3.75MHz -70.8

THD

V

REFTC

I

SOURCE

I

I

SOURCE

fIN = 5.5MHz -70.0 -57.0

f

= 22.5MHz -70.1

IN

AD

AJ

, V

COM

REF

SINK

R E F IN

REFIN

COM

REF

REFP

REFP

REFN

V

REFP

= 1.024V , V

V

REFP

REFN

- V

- V

- V

, and V

COM

COM

REFN

- V

REFN

R E F P

are generated internally)

COM

, V

, and V

R E F N

VDD / 2

- 0.15

ar e g ener ated i nter nal l y)

C OM

VDD / 2

- 0.15

-66 dBc

-70 dBc

1.5 ns

2ps

0.256 V

-0.256 V

V

/ 2

V

/ 2

DD

DD

+ 0.15

0.512 V

±30 ppm/°C

2mA

2mA

1.024 V

/ 2

V

V

/ 2

DD

DD

+ 0.15

0.512 V

2mA

dBc

dBc

dBc

RMS

V

V

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, f

CLK

= 45MHz, C

REFP

= C

REFN

= C

COM

=

0.33µF, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Maximum REFP/REFN/COM Sink
Current

REFIN Input Resistance >500 kΩ

REFIN Input Current -0.7 µA

UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, V

REFP Input Voltage V

REFN Input Voltage V

COM Input Voltage V

Differential Reference Input
Voltage

REFP Input Resistance R

REFN Input Resistance R

DIGITAL INPUTS (CLK, PD0, PD1)

Input High Threshold V

Input Low Threshold V

Input Hysteresis V

Digital Input Leakage Current DI

Digital Input Capacitance DC
DIGITAL OUTPUTS (D7–D0, A/B)

Output Voltage Low V

Output Voltage High V

Tri-State Leakage Current I

Tri-State Output Capacitance C

POWER REQUIREMENTS

Analog Supply Voltage V

Digital Output Supply Voltage OV

I

SINK

, V

REFN

, and V

COM

V

REF

REFP

REFN

REFP

- V

V

REFP

REFN

REFP

- V

- V

COM

COM

REFN

Measured between REFP and COM 4 kΩ
Measured between REFN and COM 4 kΩ

CLK

IH

PD0, PD1

CLK

IL

PD0, PD1

HYST

CLK at GND or V

IN

PD0 and PD1 at OGND or OV

IN

OLISINK

OHISOURCE

LEAK

OUT

DD

DD

= 200µA

= 200µA

DD

DD

are applied externally)

COM

0.7 x
V

DD

0.7 x

OV

DD

0.8 x

OV

DD

2.7 3.0 3.6 V

1.8 V

2mA

0.256 V

-0.256 V

VDD / 2 V

0.512 V

0.3 x
V

DD

0.3 x

OV

0.1 V

±5

±5

5pF

0.2 x

OV

±5 µA

5pF

DD

DD

DD

V

V

µA

V

V

V

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

_______________________________________________________________________________________ 5

,

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, f

CLK

= 45MHz, C

REFP

= C

REFN

= C

COM

=

0.33µF, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Analog Supply Current I

Digital Output Supply Current
(Note 3)

TIMING CHARACTERISTICS

CLK Rise to CHA Output Data
Valid

CLK Fall to CHB Output Data
Valid

CLK Rise/Fall to A/B Rise/Fall
Time

PD1 Rise to Output Enable t

PD1 Fall to Output Disable t

CLK Duty Cycle 50 %

CLK Duty-Cycle Variation ±10 %

Wake-Up Time from Shutdown
Mode

Wake-Up Time from Standby
Mode

Digital Output Rise/Fall Time 20% to 80% 2 ns

INTERCHANNEL CHARACTERISTICS

Crosstalk Rejection

Amplitude Matching fIN = 11MHz at -0.5dB FS (Note 7) ±0.05 dB

Phase Matching fIN = 11MHz at -0.5dB FS (Note 7) ±0.2 D egr ees

Normal operating mode, fIN = 5.5MHz at

-0.5dB FS, CLK input from GND to V

Idle mode (tri-state), fIN = 5.5MHz at

-0.5dB FS, CLK input from GND to V

DD

Standby mode, CLK input from
GND to V

DD

Shutdown mode, CLK = GND or VDD,
PD0 = PD1 = OGND

Normal operating mode,
f

= 5.5MHz at -0.5dB FS, CL ≈ 10pF

IN

Idle mode (tri-state), DC input, CLK =

I

ODD

GND or V

Standby mode, DC input, CLK = GND or
V

PD0 = OGND, PD1 = OV

DD,

PD0 = OVDD, PD1 = OGND

DD

Shutdown mode, CLK = GND or VDD,
PD0 = PD1 = OGND

t

DOA

t

DOB

t

DA/B

t

WAKE, SD

t

WAKE, ST

50% of C LK to 50% of d ata) ,
Fi g ur e 5 ( N ote 4)

50% of C LK to 50% of d ata,
Fi g ur e 5 ( N ote 4)

50% of C LK to 50% of A/B,
Fi g ur e 5 ( N ote 4)

PD0 = OV

EN

DIS

PD0 = OV

DD

DD

(Note 5) 20 µs

(Note 5) 2.6 µs

f

= 11MHz at -0.5dB FS,

IN,X

= 0.3MHz at -0.5dB FS (Note 6)

f

IN,Y

DD

DD

DD

19 22.5

19

8.5

0.1 5.0 µA

5mA

0.1 5.0

0.1

0.1 5.0

1 6 8.5 ns

1 6 8.5 ns

1 6 8.5 ns

5ns

5ns

-75 dB

mA

µA

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

6 _______________________________________________________________________________________

Typical Operating Characteristics

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, differential input at -0.5dB FS, f

CLK

=

45.005678MHz at 50% duty cycle, T

A

= +25°C, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, f

CLK

= 45MHz, C

REFP

= C

REFN

= C

COM

=

0.33µF, T

A

= -40°C to +85°C, unless otherwise noted. Typical values are at TA=+25°C.) (Note 1)

Note 1: Specifications ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
Note 2: SNR, SINAD, SFDR, HD3, and THD are based on a differential analog input voltage of -0.5dB FS referenced to the

amplitude of the digital output. SNR and THD are calculated using HD2 through HD6.

Note 3: The power consumption of the output driver is proportional to the load capacitance (CL).
Note 4: Guaranteed by design and characterization. Not production tested.
Note 5: SINAD settles to within 0.5dB of its typical value.
Note 6: Crosstalk rejection is measured by applying a high-frequency test tone to one channel and a low-frequency tone to the

second channel. FFTs are performed on each channel. The parameter is specified as power ratio of the first and second
channel FFT test tone bins.

Note 7: Amplitude/phase matching is measured by applying the same signal to each channel, and comparing the magnitude and

phase of the fundamental bin on the calculated FFT.

FFT PLOT CHANNEL A (DIFFERENTIAL

INPUTS, 8192-POINT DATA RECORD)

0

f

= 45.005678MHz

CLK

-10

= 12.531448MHz

f

INA

= 21.005678MHz

f

INB

-20
= A

= -0.5dB FS

A

INA

-30

-40

-50

AMPLITUDE (dB)

-60

-70

-80

-90

INB

HD3

025

ANALOG INPUT FREQUENCY (MHz)

HD2

MAX1193 toc01

f

INB

2015510

FFT PLOT CHANNEL B (DIFFERENTIAL

INPUTS, 8192-POINT DATA RECORD)

0

f

= 45.005678MHz

CLK

-10

= 12.531448MHz

f

INA

= 21.005678MHz

f

INB

-20
= A

= -0.5dB FS

A

INA

-30

-40

-50

AMPLITUDE (dB)

-60

-70

-80

-90

INB

HD3

HD2

025

ANALOG INPUT FREQUENCY (MHz)

f

INA

2015510

MAX1193 toc02

FFT PLOT CHANNEL A (DIFFERENTIAL

INPUTS, 8192-POINT DATA RECORD)

0

f

= 45.005678MHz

CLK

-10

= 21.005678MHz

f

INA

= 12.531448MHz

f

INB

-20
= A

A

INA

-30

-40

-50

AMPLITUDE (dB)

-60

-70

-80

-90

INB

HD2

025

ANALOG INPUT FREQUENCY (MHz)

= -0.5dB FS

f

INB

HD3

2015510

MAX1193 toc03

FFT PLOT CHANNEL B (DIFFERENTIAL

INPUTS, 8192-POINT DATA RECORD)

0

f

= 45.005678MHz

CLK

-10

= 21.005678MHz

f

INA

= 12.531448MHz

f

INB

-20
= A

= -0.5dB FS

A

INA

-30

-40

-50

AMPLITUDE (dB)

-60

-70

-80

-90

INB

HD2

HD3

025

ANALOG INPUT FREQUENCY (MHz)

2015510

MAX1193 toc04

f

INA

TWO-TONE IMD PLOT (DIFFERENTIAL

INPUTS, 8192-POINT DATA RECORD)

0

-10

-20

-30

-40

-50

AMPLITUDE (dB)

-60

-70

-80

-90

f

IN2

f

IN1

025

ANALOG INPUT FREQUENCY (MHz)

f

= 45.005678MHz

CLK

= 1.8MHz

f

IN1

= 2.3MHz

f

IN2

= 7dB FS

A

IN

MAX1193 toc05

2015510

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, differential input at -0.5dB FS, f

CLK

=

45.005678MHz at 50% duty cycle, T

A

= +25°C, unless otherwise noted.)

SIGNAL-TO-NOISE RATIO

vs. ANALOG INPUT FREQUENCY

50.0

49.5

49.0

48.5

48.0

SNR (dB)

47.5

47.0

46.5

46.0

0 125

ANALOG INPUT FREQUENCY (MHz)

TOTAL HARMONIC DISTORTION

vs. ANALOG INPUT FREQUENCY

-45

-50

-55

-60

-65

THD (dBc)

-70

-75

-80

-85
0 125

ANALOG INPUT FREQUENCY (MHz)

SIGNAL-TO-NOISE PLUS DISTORTION

vs. ANALOG INPUT FREQUENCY

50.0

CHANNEL A

CHANNEL B

1007525 50

CHANNEL A

CHANNEL B

1007525 50

MAX1193 toc06

MAX1193 toc08

49.5

49.0

48.5

48.0

SINAD (dB)

47.5

47.0

46.5

46.0
0 125

ANALOG INPUT FREQUENCY (MHz)

CHANNEL A

CHANNEL B

SPURIOUS-FREE DYNAMIC RANGE

vs. ANALOG INPUT FREQUENCY

85

80

75

70

65

SFDR (dBc)

60

55

50

45

0 125

CHANNEL B

CHANNEL A

ANALOG INPUT FREQUENCY (MHz)

MAX1193 toc07

1007525 50

MAX1193 toc09

1007525 50

MAX1193

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD= 3.0V, OVDD= 1.8V, V

REFIN

= VDD(internal reference), CL≈ 10pF at digital outputs, differential input at -0.5dB FS, f

CLK

=

45.005678MHz at 50% duty cycle, T

A

= +25°C, unless otherwise noted.)

60

50

40

30

SNR (dB)

20

10

0

-30 0

-30

-40

-50

SIGNAL-TO-NOISE RATIO

vs. ANALOG INPUT POWER

fIN = 11.531606MHz

-10

ANALOG INPUT POWER (dB FS)

TOTAL HARMONIC DISTORTION

vs. ANALOG INPUT POWER

fIN = 11.531606MHz

SIGNAL-TO-NOISE PLUS DISTORTION

vs. ANALOG INPUT POWER

60

fIN = 11.531606MHz

MAX1193 toc10

-5-15-25 -20

50

40

30

SINAD (dB)

20

10

0

-30 0
ANALOG INPUT POWER (dB FS)

-10-20

MAX1193 toc11

SPURIOUS-FREE DYNAMIC RANGE

vs. ANALOG INPUT POWER

80

fIN = 11.531606MHz

MAX1193 toc12

70

60

MAX1193 toc13

THD (dBc)

-60

-70

-80

-30 0
ANALOG INPUT POWER (dB FS)

-10

-5-15-25 -20

SFDR (dBc)

50

40

30

-30 0
ANALOG INPUT POWER (dB FS)

-10

-5-15-25 -20