ADC12DL080 datasheet(8/34 Pages) TI1

Part #	ADC12DL080

Description	A/D Converter for IF Sampling

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Manufacturer	TI1 [Texas Instruments]

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ADC12DL080

SNAS345A – FEBRUARY 2006 – REVISED APRIL 2013

www.ti.com

Converter Electrical Characteristics

(1) (2) (3)

Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA = VD = +3.3V, VDR =

+2.5V, PD = 0V, External VREF = +1.0V, fCLK = 80 MHz, fIN = 40 MHz, CL = 10 pF/pin, Duty Cycle Stabilizer On. Boldface

limits apply for TJ = TMIN to TMAX: all other limits TJ = 25°C

Units

Parameter

Test Conditions

Typical(4)

Limits(4)

(Limits)

STATIC CONVERTER CHARACTERISTICS

Resolution with No Missing Codes

12

Bits (min)

INL

Integral Non Linearity(5)

fIN = 0, Best Fit Method

±0.9

±3.5

LSB (max)

DNL

Differential Non Linearity

fIN = 0

±0.4

±1.0

LSB (max)

PGE

Positive Gain Error

±0.3

±3.5

%FS (max)

NGE

Negative Gain Error

±0.3

±3.5

%FS (max)

TC GE

Gain Error Tempco

−40°C ≤ TA ≤ +85°C

10

ppm/°C

+0.75

%FS (max)

VOFF

Offset Error (VIN+ = VIN−)

-0.2

-1.1

%FS (min)

TC VOFF

Offset Error Tempco

−40°C ≤ TA ≤ +85°C

16

ppm/°C

Under Range Output Code

0

Over Range Output Code

4095

REFERENCE AND ANALOG INPUT CHARACTERISTICS

1.0

V (min)

VCM

Common Mode Input Voltage

1.5

2.0

V (max)

VRMA,

Reference Output Voltage

1.5

V

VRMB

(CLK LOW)

8

pF

CIN

VIN Input Capacitance (each pin to GND)

VIN = 1.5 Vdc ±0.5V

(CLK HIGH)

7

pF

0.8

V (min)

VREF

External Reference Voltage(6)

1.00

1.2

V (max)

Reference Input Resistance

1

M

Ω (min)

DYNAMIC CONVERTER CHARACTERISTICS

FPBW

Full Power Bandwidth

0 dBFS Input, Output at

−3 dB

600

MHz

fIN = 40 MHz, VIN = −1 dBFS

69.3

67

dBFS (min)

SNR

Signal-to-Noise Ratio(7)

fIN = 200 MHz, VIN = −1 dBFS

67

dBFS

fIN = 40 MHz, VIN = −1 dBFS

69

66.5

dBFS (min)

SINAD

Signal-to-Noise and Distortion(7)

fIN = 200 MHz, VIN = −1 dBFS

66.5

dBFS

fIN = 40 MHz, VIN = −1 dBFS

11

10.75

Bits (min)

ENOB

Effective Number of Bits(7)

fIN = 200 MHz, VIN = −1 dBFS

10.75

Bits

fIN = 40 MHz, VIN = −1 dBFS

−80

-71

dBc (min)

THD

Total Harmonic Distortion

fIN = 200 MHz, VIN = −1 dBFS

−76.8

dBc

fIN = 40 MHz, VIN = −1 dBFS

−85

-73

dBc (min)

H2

Second Harmonic Distortion

fIN = 200 MHz, VIN = −1 dBFS

−84

dBc

(1)

The inputs are protected as shown below. Input voltage magnitudes above VA or below GND will not damage this device, provided

current is limited per Note 4 of the Absolute Maximum Ratings Table. However, errors in the A/D conversion can occur if the input goes

above VA or below GND by more than 100 mV. As an example, if VA is +3.3V, the full-scale input voltage must be ≤+3.4V to ensure

accurate conversions. See Figure 2.

(2)

To ensure accuracy, it is required that |VA–VD| ≤ 100 mV and separate bypass capacitors are used at each power supply pin.

(3)

With the test condition for VREF = +1.0V (2VP-P differential input), the 12-bit LSB is 488 µV.

(4)

Typical figures are at TJ = 25°C, and represent most likely parametric norms. Test limits are to AOQL (Average Outgoing Quality Level).

(5)

Integral Non Linearity is defined as the deviation of the analog value, expressed in LSBs, from the straight line that passes through

positive and negative full-scale.

(6)

Optimum performance will be obtained by keeping the reference input in the 0.8V to 1.2V range. The LM4051CIM3-ADJ (SOT-23

package) is recommended for external reference applications.

(7)

This parameter is specified in units of dBFS - indicating the equivalent value that would be attained with a full-scale input signal

8

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