ADC12C170 datasheet(8/29 Pages) TI1

Part #	ADC12C170

Description	12-Bit, 170 MSPS, 1.1 GHz Bandwidth A/D Converter with CMOS Outputs

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Manufacturer	TI1 [Texas Instruments]

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VA

AGND

To Internal Circuitry

I/O

ADC12C170

SNAS374D – DECEMBER 2006 – REVISED APRIL 2009

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Dynamic Converter Electrical Characteristics (continued)

Unless otherwise specified, the following specifications apply: VIN = -1dBFS, AGND = DGND = DRGND = 0V, VA = VD =

+3.3V, VDR = +1.8V, Internal VREF = +1.0V, fCLK = 170 MHz, VCM = VRM, CL = 5 pF/pin, Single-Ended Clock Mode, Offset

Binary Format. Typical values are for TA = 25°C. Boldface limits apply for TMIN ≤ TA ≤ TMAX. All other limits apply for TA =

25°C

(1) (2) (3)

Typical

Units

Symbol

Parameter

Conditions

Limits

(4)

(Limits)

fIN = 10 MHz

67.3

dBFS

fIN = 70 MHz

67.1

65.2

dBFS

SINAD

Signal-to-Noise and Distortion Ratio

fIN = 150 MHz

67.0

dBFS

fIN = 250 MHz

66.6

dBFS

fIN = 400 MHz

64.7

dBFS

Logic and Power Supply Electrical Characteristics

Unless otherwise specified, the following specifications apply: VIN = -1 dBFS, AGND = DGND = DRGND = 0V, VA = VD =

+3.3V, VDR = +1.8V, Internal VREF = +1.0V, fCLK = 170 MHz, VCM = VRM, CL = 5 pF/pin, Single-Ended Clock Mode, Offset

Binary Format. Typical values are for TA = 25°C. Boldface limits apply for TMIN ≤ TA ≤ TMAX. All other limits apply for TA =

25°C

(1) (2) (3)

Units

Symbol

Parameter

Conditions

Typical (4)

Limits

(Limits)

CLK INPUT CHARACTERISTICS

VIN(1)

Logical “1” Input Voltage

VD = 3.6V

2.0

V (min)

VIN(0)

Logical “0” Input Voltage

VD = 3.0V

0.8

V (max)

IIN(1)

Logical “1” Input Current

VIN = 3.3V

10

µA

IIN(0)

Logical “0” Input Current

VIN = 0V

−10

µA

CIN

Input Capacitance

5

pF

DIGITAL OUTPUT CHARACTERISTICS (D0–D11, DRDY, OVR)

VOUT(1)

Logical “1” Output Voltage

IOUT = −0.5 mA , VDR = 1.8V

1.2

V (min)

VOUT(0)

Logical “0” Output Voltage

IOUT = 1.6 mA, VDR = 1.8V

0.4

V (max)

+ISC

Output Short Circuit Source Current

VOUT = 0V

−10

mA

−ISC

Output Short Circuit Sink Current

VOUT = VDR

10

mA

COUT

Digital Output Capacitance

5

pF

POWER SUPPLY CHARACTERISTICS

IA

Analog Supply Current

Full Operation

207

259

mA (max)

ID

Digital Supply Current

Full Operation

9.8

10.7

mA (max)

IDR

Digital Output Supply Current

Full Operation (5)

13

mA

(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 under Absolute Maximum Ratings. However, errors in the A/D conversion can occur if the input goes above

2.6V or below GND as described in the Operating Ratings section.

(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 488.3 µV.

(4)

Typical figures are at TA = 25°C and represent most likely parametric norms at the time of product characterization. The typical

specifications are not ensured.

(5)

IDR is the current consumed by the switching of the output drivers and is primarily determined by load capacitance on the output pins,

the supply voltage, VDR, and the rate at which the outputs are switching (which is signal dependent). IDR=VDR(C0 x f0 + C1 x f1 +....C11 x

f11) where VDR is the output driver power supply voltage, Cn is total capacitance on the output pin, and fn is the average frequency at

which that pin is toggling.

8

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