ZXCT1082Q/83Q/84Q/85Q/86Q/87Q

Document number: DS37015 Rev. 1 - 2

3 of 13

www.diodes.com

April 2014

© Diodes Incorporated

A Product Line of

Diodes Incorporated

ZXCT1082Q/83Q/84Q/85Q/86Q/87Q

Electrical Characteristics

Test Conditions TA = +25C, VS+ = 12V, VCC = 5 V, VSENSE = 100mV (Note 5), ZXCT1082Q/83Q RGT = 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 = 0mV (Note 5)

—

—

1.7

—

µA

TA = FT

—

—

5

IS-

S- input current

—

—

1.7

—

µA

TA = FT

—

—

5

VIO

Input Offset Voltage

(Note 7)

VSENSE = 0mV

—

—

±0.2

±1

mV

ZXCT1082Q/ 83Q/ 84Q/ 85Q

TA = FT

—

—

±2.5

ZXCT1086Q/ 87Q

TA = FT

—

—

±3

Temperature co-efficient

—

±4

—

µV/K

Output

GT

Transconductance

ZXCT1082Q/83Q

VSENSE = 10mV to 150mV

(Notes 5, 8)

—

—

200

—

µA/V

GT-ERR

Transconductance error

(Note 9)

—

-1

—

+1

%

TA = FT

-2

—

+2

GT-TC

Transconductance

temperature co-efficient

TA = FT

—

10

—

nA/K

ZOUT

Output impedance

ZXCT1082Q/83Q

—

1¦¦5

—

GΩ¦¦pF

GV

Gain

ZXCT1084Q/85Q/86Q/87Q

VSENSE = 10mV to 150mV (Note 5)

ZXCT1084Q/85Q

—

25

—

V/V

ZXCT1086Q/87Q

—

50

—

GV-ERR

Gain error (Note 9)

—

-1

—

+1

%

TA = FT

-2

—

+2

GV-TC

Voltage gain temperature

co-efficient

TA = FT

—

100

—

ppm/K

ZOUT

Output impedance

ZXCT1084Q/85Q/86Q/87Q

—

125

—

kΩ

VOUTH

Output relative to common

mode, VS-

ZXCT1082Q/83Q

VLOAD - 1 VLOAD - 0.8

—

V

ZXCT1084Q/85Q/86Q/87Q

VS- - 1

VS- - 0.8

—

Notes:

5. 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-“

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

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

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