VCA2615RGZR datasheet(4/29 Pages) TI

Part #	VCA2615RGZR

Description	Dual, Low-Noise Variable-Gain Amplifier with Preamp

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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4 / 29 page

VCA2615

SBOS316C − JULY 2005 − REVISED SEPTEMBER 2005

www.ti.com

4

ELECTRICAL CHARACTERISTICS (continued)

All specifications at TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground; the input to the preamp (LNP) is single-ended;

fIN = 5MHz, LNP Gain (G1, G2) = 10, H/L = 0, VCNTL = 2.5V; VCA output is 1VPP differential; CA, CB = 3.9µF, unless otherwise noted.

PARAMETER

UNIT

VCA2615

CONDITIONS

PARAMETER

UNIT

MAX

TYP

MIN

CONDITIONS

ACCURACY

Gain Slope

VCNTL = 0.4V to 2.0V

22

dB/V

Gain Error(4)

VCNTL = 0.4V to 2.0V

−1.5

±0.9

+1.5

dB

Gain Range

VCNTL = 0.2V to 2.5V

52

dB

Gain Range

VCNTL = 0.4V to 2.0V

36.5

dB

Gain Range (H/L)

H/L = 0 (+6dB); VGA High Gain; VCNTL = 0.2V to 2.5V

−12 to +40

dB

H/L = 1 (0dB); VGA Low Gain; VCNTL = 0.2V to 2.5V

−18 to +34

dB

Output Offset Voltage, Differential

±50

mV

Channel-to-Channel Gain Matching

VCNTL = 0.4V to 2.0V, CHA to CHB

±0.33

dB

GAIN CONTROL INTERFACE (VCNTL)

Input Voltage Range

0.2 to 2.5

V

Input Resistance

Response Time

1

M

Ω

Input Resistance

Response Time

VCNTL = 0.2V to 2V; to 90% Signal Level

0.6

µs

DIGITAL INPUTS(5), (6)

(G1, G2, PDL, PDV, H/L, FB1-FB4, VCAINSEL)

VIH, High-Level Input Voltage

2.0

V

VIL, Low-Level Input Voltage

0.8

V

Input Resistance

1

M

Ω

Input Capacitance

5

pF

POWER SUPPLY

Supply Voltage

4.75

5.0

5.25

V

Power-Up Response Time

25

µs

Power-Down Response Time

2

µs

Total Power Dissipation

PDV, PDL = 1

308

350

mW

VGA Power-Down

PDV = 0, PDL = 1

236

mW

LNP Power-Down

PDL = 0, PDV = 1

95

mW

THERMAL CHARACTERISTICS

Temperature Range

Ambient, Operating

−40

+85

°C

Thermal Resistance,

qJA

Soldered Pad; Four-Layer PCB with Thermal Vias

29.1

°C/W

qJC

2.2

°C/W

(1)

R

IN +

R

F

(1

)

A

LNP

2

)

(2) 2nd, 3rd-harmonic distortion less than or equal to −30dBc.

(3) See Table 5.

(4) Referred to best-fit dB linear curve.

(5) Parameters ensured by design; not production tested.

(6) Do not leave inputs floating; no internal pull-up/pull-down resistors.

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