TS1105/06/09 Current Sense Amplifier EVB User s Guide The TS1105, TS1106, and TS1109 combine a high-side current sense amplifier (CSA) KEY FEATURES with a buffered output featuring an adjustable bias. The TS1109 bidirectional CSA buf- fered output uses a bipolar scheme with respect to the bias voltage, while the TS1106 R : 50 m 0.5% SENSE bidirectional CSA buffered output uses a unipolar scheme. Adjustable Bias for CSA Buffer The TS1105/06/09 CSA requires a very low 0.68 A supply current, while the CSA buf- Compatible for Both Gain Options fered output requires a very low nominal supply current of 0.76 A. These CSAs are de- 20 V/V signed for high precision current measurements as the TS1109 combines a 1% gain er- 200 V/V ror(MAX) with a 150 V VOS(MAX) while the TS1105/06 combine a 0.6% gain er- ror(MAX) with a 100 V VOS(MAX) . The inverting terminal of the CSA output buffer, ORDERING INFORMATION FILT, is also made accessible so that a RC Filter can be connected to reduce noise. TS1105-20DB The TS1105/06/09 is fully specified to operate over the 40 C to +85 C temperature TS1105-200DB range and is available in a low-profile, thermally-enhanced, 8-pin 3 x 3 mm TDFN pack- age with an exposed back-side paddle. TS1106-20DB TS1106-200DB TS1109-20DB TS1109-200DB silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 TS1105/06/09 Current Sense Amplifier EVB User s Guide Description 1. Description The TS1105/06/09 Evaluation Board is intended for evaluation of the current sense amplifier plus the buffered output with adjustable bias. The evaluation board includes a variable reference scheme so that the bias voltage of the CSA buffered output can be adjusted with respect to the VDD voltage. The jumpers, JP2 and JP3, can be connected so that the included potentiometer can be used to adjust the bias voltage. The Quick Start Procedure details adjustment of the bias voltage for the CSA buffered output and measurement of the output voltage for a given load. Table 1.1. Component List Designation Quantity Description U1 1 TS1105-20, TS1105-200 TS1106-20, TS1106-200 TS1109-20, TS1109-200 R1 1 4.02 k 1%, 1/16 W (0603) R2 1 0.05 0.5%,1/2 W (1206) C1, C6 2 1 F 10%, 10 V (0603) C2, C10 2 0.1 F 10%, 10 V (0603) C5 1 0.47 F 10%, 10 V (0603) J1, J2, J3, J4 4 Header 1 x 1 J5 (TS1106 and TS1109 Only) 1 Header 1 x 1 JP1, JP2, JP3, JP4, JP5 5 Header 1 x 2 JS1, JS2 2 Jumper Shunt silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 1