ZXCT1082 datasheet(3/13 Pages) DIODES

3 / 13 page

ZXCT1082/83/84/85/86/87

Document number: DS32162 Rev. 1 - 2

3 of 13

www.diodes.com

May 2010

A Product Line of

Diodes Incorporated

Electrical Characteristics Test Conditions T

A = 25°C, VS+ = 12V, VCC = 5 V, VSENSE

1 = 100mV, ZXCT1082/3 R

GT = 5kΩ,

RG = 125kΩ; unless otherwise stated. (FT = -40°C to +125°C)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Input

IS+

S+ input current

VSENSE

1 = 0mV

1.7

µA

TA = FT

IS-

S- input current

1.7

µA

TA = FT

ISO

SENSE input offset current VSENSE = -5mV

ZXCT1082/3

µA

VIO

Input Offset Voltage

VSENSE = 0mV

±0.2

±1

ZXCT1082/3/4/5

TA = FT

±2.5

ZXCT1086/87

TA = FT

±3

Temperature co-efficient

±4

µV/K

Output

Transconductance

ZXCT1082/3

VSENSE

1 =

10mV

3 to 150mV

200

µA/V

GT-ERR

Transconductance error

-1

TA = FT

-2

GT-TC

Transconductance

temperature co-efficient

TA = FT

nA/K

ZOUT

Output impedance

ZXCT1082/3

1¦¦5

Ω¦¦pF

Gain

ZXCT1084/5/6/7

VSENSE

1 =

10mV to 150mV

1084/5

V/V

1086/7

GV-ERR

Gain error

-1

TA = FT

-2

GV-TC

Voltage gain temperature

co-efficient

TA = FT

100

ppm/K

ZOUT

Output impedance

ZXCT1084/5/6/7

125

Ω

VOUTH

Output relative to common

mode, VS-

ZXCT1082/3

VLOAD - 1

VLOAD

- 0.8

ZXCT1084/5/6/7

VS- - 1

VS- - 0.8

AC characteristics

-3dB Small Signal

Bandwidth

VSENSE

(AC) = 10mVPP

G = 25

500

kHz

G = 50

200

ts(0.1%)

Settling time (0.1%)

VSENSE = 50mV to 300mV

step

G = 25

µs

VSENSE = 50mV to 200mV

step

G = 50

iN-OUT

Output noise current

density

f = 1kHz

ZXCT1082/3

pA/

√Hz

f = 10kHz

Total output noise current

f = 0.1Hz to 100kHz

nARMS

vN-OUT

Output noise voltage

density

f = 1kHz

ZXCT1084/5

1.5

µV/

√Hz

ZXCT1086/7

2.9

f = 10kHz

ZXCT1084/5

1.2

ZXCT1086/7

2.3

Total output noise voltage

f = 0.1Hz to 100kHz

ZXCT1084/5

390

µVRMS

ZXCT1086/7

730

Notes:

1. For the ZXCT1082/83 VSENSE = “VSUPPLY” – “VLOAD“ where VLOAD is the load voltage or the lower potential side of the sense resistor.

For the ZXCT1083/84/85/86 VSENSE = “VS+” – “VS-“

2. VIO is extrapolated from measurements for the gain-error test.

3. For VSENSE > 10mV, the internal voltage-current converter is fully linear. This enables a true offset to be defined and used.

4. Gain or transconductance error is calculated by applying two values of VSENSE and calculating the error of the slope vs. the ideal.

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