|
|
Part: ACF2101
Category:
Description:
Company: Texas Instruments, Inc.
Datasheet: Download ACF2101 datasheet File size : 484 kB
Request For quote: Find where to buy ACF2101
Datasheet text preview:
®
FPO
ACF2101
Low Noise, Dual SWITCHED INTEGRATOR
FEATURES
q INCLUDES INTEGRATION CAPACITOR, RESET AND HOLD SWITCHES, AND OUTPUT MULTIPLEXER q LOW NOISE: 10µVrms q LOW CHARGE TRANSFER: 0.1pC q WIDE DYNAMIC RANGE: 120dB q LOW BIAS CURRENT: 100fA
APPLICATIONS
q q q q q q CURRENT TO VOLTAGE CONVERSION PHOTODIODE INTEGRATOR CURRENT MEASUREMENT CHARGE MEASUREMENT CT SCANNER FRONT END MEDICAL, SCIENTIFIC, AND INDUSTRIAL INSTRUMENTATION
DESCRIPTION
The ACF2101 is a dual switched integrator for precision applications. Each channel can convert an input current to an output voltage by integration, using either an internal or external capacitor. Included on the chip are precision 100pF integration capacitors, hold and reset switches, and output multiplexers. As a complete circuit on a single chip, the ACF2101 eliminates many of the problems commonly encountered in discrete designs, such as leakage current errors and noise pickup. The integrating approach can provide lower noise than conventional transimpedance amplifier designs and also eliminates the need for high performance, high value feedback resistors. The extremely low bias current and low noise of the ACF2101's Difet ® amplifiers, along with active laser trimming of both offset and drift, assure precision current to voltage conversion. Although designed for +5V, 15V supplies, the ACF2101 can be operated on supplies up to ±18VDC. It is available in both 24-pin plastic DIP and SOIC packages.
Difet® Burr-Brown Corp.
A Cap A In A
Reset B A
Hold B A CINTERNAL 100pF Reset
Select B
Out A
A
Select Sw Out A
Sw In A Hold
Com A CINTERNAL Cap B In B Reset Sw In B Hold 100pF
Sw Com A
Out B
B
Select Sw Out B
Com B A V+ B V
Sw Com B
Gnd
International Airport Industrial Park · Mailing Address: PO Box 11400, Tucson, AZ 85734 · Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 · Tel: (520) 746-1111 · Twx: 910-952-1111 Internet: http://www.burr-brown.com/ · FAXLine: (800) 548-6133 (US/Canada Only) · Cable: BBRCORP · Telex: 066-6491 · FAX: (520) 889-1510 · Immediate Product Info: (800) 548-6132
SBFS003
© 1990 Burr-Brown Corporation
PDS-1078D
Printed in U.S.A. September, 1994
SPECIFICATIONS
ELECTRICAL
At TA = +25°C, V+ = +5V, V = 15V, Internal CINTEGRATION = CINTERNAL = 100pF, unless otherwise noted. ACF2101BP, BU PARAMETER ANALOG INPUT INPUT RANGE Input Current Range Switched Input (SW IN A, SW IN B) Direct Input (IN A, IN B) INPUT IMPEDANCE Switched Input Hold Switch OFF Hold Switch ON Direct Input HOLD SWITCH VOLTAGE Hold Switch Withstand Voltage OFFSET VOLTAGE Input Offset Voltage Average Drift DIGITAL INPUTS Logic Family VIH (Logic 1 = Switch OFF) VIL (Logic 0 = Switch ON) IIH IIL Switching Speed (All Switches) Switch ON Switch OFF TRANSFER CHARACTERISTICS TRANSFER FUNCTION DYNAMIC CHARACTERISTICS Integrate Mode Slew Rate Reset Mode Slew Rate Settling Time to 0.01%FSR(1) Overload Recovery Output Multiplexer (Select Switches) Settling Time to 0.01%FSR Settling Time to 0.01%FSR INTEGRATION CAPACITOR (CINTERNAL) Internal Capacitor Value Accuracy Temperature Coefficient Memory RESET SWITCH Impedance Reset OFF Reset ON MODES OF OPERATION Switch Integrate Mode Hold Mode Reset Mode (Logic 1 = OFF, Logic 0 = ON) H old ON OFF ON/OFF Reset OFF OFF ON V OUT = 1 CINTEGRATION TTL Compatible 2 0.5 VIH = +5V VIL = 0V 2 0 200 200 5.5 0.8 V V µA µA ns ns Hold Switch OFF 10 ±0.5 ±1 CONDITIONS MIN TYP MAX UNITS
±100 ±100
µA µA
1000 1.5 Virtual Ground +0.5 ±2 ±5
G k
V mV µV/°C
I dt
IN
V
1
3 3 5 5 6.5 2
V/µs V/µs µs µs µs µs
10V Step Positive or Negative CLOAD < 1000pF CLOAD < 100pF
10
50
100 0.5 25 30
2 0 100
pF % ppm/°C ppm of FSR
1000 1.5
G k
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
®
ACF2101
2
SPECIFICATIONS (CONT)
At TA = +25°C, V+ = +5V, V = 15V, Internal CINTEGRATION = CINTERNAL = 100pF, unless otherwise noted. ACF2101BP, BU PARAMETER OUTPUT Voltage Output Range (All Outputs) Current Output, Direct Output (Out A, Out B) Short Circuit Current Direct Output Switched Output (Sw Out A, Sw Out B) Select Switch Withstand Voltage Switched Output Switched Common (Sw Com A, Sw Com B) Output Impedance Direct Output Switched Output Select Switch ON Select Switch OFF Leakage Current Load Capacitance Stability Direct Output Switched Output OUTPUT ACCURACY Nonlinearity Channel Separation Op Amp Bias Current Value Temperature Coefficient Hold Mode Droop Integrate Mode Droop Voltage Offset(2) Value Temperature Coefficient Power Supply Rejection OUTPUT NOISE Total Output Noise(3) Integrate Mode(4) Hold Mode Reset Mode CHARGE TRANSFER ERRORS(5) Reset to Integrate Mode(6) Charge Transfer Charge Transfer TC Charge Offset Error Charge Offset TC Integrate to Hold Mode Charge Transfer Charge Transfer TC Charge Offset Error Charge Offset TC Hold to Integrate Mode Charge Transfer Charge Transfer TC Charge Offset Error Charge Offset TC POWER SUPPLY Specified Operating Voltage Operating Voltage Range Positive Supply Negative Supply Current Positive Supply Negative Supply TEMPERATURE RANGE Specification Operation Storage Thermal Resistance (both packages) 40 40 40 Junction to Ambient 100 +85 +125 +125 °C °C °C °C/W +5, 15 +4.5 10 For Dual For Dual 12 3.5 +18 18 15 5.2 V V V mA mA ±0.005 80 100 Doubles Each +10°C 1 1 3 5 100 2 10(1 + CIN/CINTEGRATION) 10 10 ±0.01 %FSR dB fA nV/ µ s nV/ µ s mV µV/°C dB µVrms µVrms µVrms µVrms 10 ±5 13.5, +1.0 +0.5 V mA mA mA +0.5 +0.5 0.1 250 || 5 1000 || 4 10 500 Any V V || pF G || pF pA pF pF CONDITIONS MIN TYP MAX UNITS
±2 10 0.5
±25 ±8
Select Switch OFF
100
1000 10 10
VS = +4.5V to +18V, 10V to 18V BW = 0.1Hz to 10Hz BW = 0.1Hz to 250kHz BW = 0.1Hz to 250kHz BW = 0.1Hz to 250kHz
80
0.1 0.2 1 2 CIN > 50pF 0.2 0.4 2 4 CIN > 50pF 0.2 0.4 2 4
0.5 5
pC fC/°C mV µV/°C pC fC/°C mV µV/°C pC fC/°C mV µV/°C
1 10
1 10
NOTES: (1) FSR is Full Scale Range = 10V (0 to 10V). (2) Includes offset errors from all modes of operation. (3) Total noise is rms total of noise for the modes of operation used. (4) CIN = capacitance of sensor connected to ACF2101 input; CINTERGRATION = integration capacitance = CINTERNAL + CEXTERNAL. (5) Errors created when the internal switches are driven from one mode to another. (6) The charge transfer is 0.1pC; for an integration capacitance of 100pF, the resultant charge offset voltage error is 1mV.
®
3
ACF2101
ABSOLUTE MAXIMUM RATINGS
Supply ..... ±18V Input Current .... ±5mA Output Short Circuit Duration .......... Continuous to Ground Power Dissipation ........ 500mW Operating Temperature ........ 40°C to +125°C Storage Temperature ...... 40°C to +125°C Junction Temperature ........... +150°C Lead Temperature (soldering, 10s) ..... +300°C
ELECTROSTATIC DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from performance degradation to complete device failure. BurrBrown Corporation recommends that all integrated circuits be handled and stored using appropriate ESD protection methods.
PACKAGE/ORDERING INFORMATION
PACKAGE DRAWING NUMBER(1) 243 239 TEMPERATURE RANGE 40°C to +85°C 40°C to +85°C
PRODUCT ACF2101BP ACF2101BU
PACKAGE 24-Pin Plastic DIP 24-Pin Plastic SOIC
NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book.
PIN CONFIGURATION DIP and SOIC package have different pinouts.
TOP VIEW ACF2101BU TOP VIEW ACF2101BP
1 2 3 4 5 6 7 8 9 10 11 12
Sw In B In B Cap B Com B Gnd B Out B Sw Out B Sw Com B Select B Reset B Hold B V
Sw In A In A Cap A Com A Gnd A Out A Sw Out A Sw Com A Select A Reset A Hold A
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
Out A Gnd A Com A Cap A In A Sw In A Sw In B In B Cap B Com B Gnd B Out B
Sw Out A Sw Com A Select A Reset A Hold A V+ V Hold B Reset B Select B Sw Com B
24 23 22 21 20 19 18 17 16 15 14 13
SOIC
V+
DIP
Sw Out B
®
ACF2101
4
DICE INFORMATION
PAD 1 2 3 4 5 6 7 8 9 10 11 12
FUNCTION A Out A Ground A Common A Cap A In A Switch-In B Switch-In B In B Cap B Common B Ground B Out
PAD 13 14 15 16 17 18 19 20 21 22 23 24
FUNCTION B Switch-Out B Switch-Common B Select B Reset B Hold V V+ A Hold A Reset A Select A Switch-Common A Switch-Out
Substrate Bias: Ground.
MECHANICAL INFORMATION
MILS (0.001") Die Size Die Thickness Min. Pad Size 132 x 157 ±5 20 ±3 4x4 MILLIMETERS 3.35 x 3.99 ±0.13 0.51 ±0.08 0.10 x 0.10 None
ACF2101 DIE TOPOGRAPHY
Backing
®
5
ACF2101
Others parts begin by ac
AC-1 AC-2 AC-3 AC-4 AC-5 AC-6 AC-7 AC-8 AC-9 AC-10 AC-11 AC-12 AC-13 AC-14 AC-15
|
|
|
