Datasheet MAX4238, MAX4239 (Maxim) - 8
| Manufacturer | Maxim |
| Pages / Page | 9 / 8 — Output Overload Recovery. Pin Configurations. Shutdown. Applications … |
| File Format / Size | PDF / 1.3 Mb |
| Document Language | English |
Output Overload Recovery. Pin Configurations. Shutdown. Applications Information. TDFN. (3mm x 3mm x 0.8mm)
Text Version of Document
MAX4238/MAX4239 Ultra-Low Offset/Drift, Low-Noise, Precision SOT23 Amplifiers
Output Overload Recovery Pin Configurations
Autozeroing amplifiers typically require a substantial amount of time to recover from an output overload. This is due to the TOP VIEW time it takes for the null amplifier to correct the main amplifier VCC SHDN IN- to a valid output. The MAX4238/MAX4239 require only 6 5 4 3.3ms to recover from an output overload (see Electrical Characteristics and Typical Operating Characteristics). EP*
Shutdown
MAX4238/ MAX4239 The MAX4238/MAX4239 feature a low-power (0.1µA) shutdown mode. When SHDN is pulled low, the clock stops and the device output enters a high-impedance
+
1 2 3 state. Connect SHDN to VCC for normal operation. OUT GND IN+
Applications Information TDFN (3mm x 3mm x 0.8mm) Minimum and Maximum Gain Configurations
*CONNECT EP TO GND. The MAX4238 is a unity-gain stable amplifier with a gain-bandwidth product (GBWP) of 1MHz. The MAX4239 is decompensated for a GBWP of 6.5MHz and is stable MAX4238/ MAX4238/ with a gain of 10V/V. Unlike conventional operational MAX4239 MAX4239 amplifiers, the MAX4238/MAX4239 have a maximum gain specification. To maintain stability, set the gain of the SHDN 1 8 N.C. OUT 1 6 VCC MAX4238 between AV = 1000V/V to 1V/V, and set the IN- 2 7 VCC gain of the MAX4239 between AV = 6700V/V and 10V/V. GND 2 5 SHDN IN+ 3 6 OUT
ADC Buffer Amplifier
GND 4 5 N.C. IN+ 3 4 IN- The low offset, fast settling time, and 1/f noise cancellation of the MAX4238/MAX4239 make these devices ideal for
SO SOT23
ADC buffers. The MAX4238/MAX4239 are well suited for low-speed, high-accuracy applications, such as strain gauges (see Typical Application Circuit).
Chip Information Error Budget Example
PROCESS: BiCMOS When using the MAX4238/MAX4239 as an ADC buffer, the temperature drift should be taken into account when determining the maximum input signal. With a typical offset
Package Information
drift of 10nV/°C, the drift over a 10°C range is 100nV. For the latest package outline information and land patterns Setting this equal to 1/2LSB in a 16-bit system yields a (footprints), go to
www.maximintegrated.com/packages
. Note full-scale range of 13mV. With a single 2.7V supply, an that a “+”, “#”, or “-” in the package code indicates RoHS status acceptable closed-loop gain is AV = 200. This provides only. Package drawings may show a different suffix character, but sufficient gain while maintaining headroom. the drawing pertains to the package regardles of RoHS status.
PACKAGE PACKAGE OUTLINE LAND TYPE CODE NO. PATTERN NO.
6 SOT23 U6F-6
21-0058 90-0175
8 SO S8-4
21-0041 90-0096
6 TDFN-EP T633+2
21-0137 90-0058
www.maximintegrated.com Maxim Integrated │ 8
Output Overload Recovery Pin Configurations
Autozeroing amplifiers typically require a substantial amount of time to recover from an output overload. This is due to the TOP VIEW time it takes for the null amplifier to correct the main amplifier VCC SHDN IN- to a valid output. The MAX4238/MAX4239 require only 6 5 4 3.3ms to recover from an output overload (see Electrical Characteristics and Typical Operating Characteristics). EP*
Shutdown
MAX4238/ MAX4239 The MAX4238/MAX4239 feature a low-power (0.1µA) shutdown mode. When SHDN is pulled low, the clock stops and the device output enters a high-impedance
+
1 2 3 state. Connect SHDN to VCC for normal operation. OUT GND IN+
Applications Information TDFN (3mm x 3mm x 0.8mm) Minimum and Maximum Gain Configurations
*CONNECT EP TO GND. The MAX4238 is a unity-gain stable amplifier with a gain-bandwidth product (GBWP) of 1MHz. The MAX4239 is decompensated for a GBWP of 6.5MHz and is stable MAX4238/ MAX4238/ with a gain of 10V/V. Unlike conventional operational MAX4239 MAX4239 amplifiers, the MAX4238/MAX4239 have a maximum gain specification. To maintain stability, set the gain of the SHDN 1 8 N.C. OUT 1 6 VCC MAX4238 between AV = 1000V/V to 1V/V, and set the IN- 2 7 VCC gain of the MAX4239 between AV = 6700V/V and 10V/V. GND 2 5 SHDN IN+ 3 6 OUT
ADC Buffer Amplifier
GND 4 5 N.C. IN+ 3 4 IN- The low offset, fast settling time, and 1/f noise cancellation of the MAX4238/MAX4239 make these devices ideal for
SO SOT23
ADC buffers. The MAX4238/MAX4239 are well suited for low-speed, high-accuracy applications, such as strain gauges (see Typical Application Circuit).
Chip Information Error Budget Example
PROCESS: BiCMOS When using the MAX4238/MAX4239 as an ADC buffer, the temperature drift should be taken into account when determining the maximum input signal. With a typical offset
Package Information
drift of 10nV/°C, the drift over a 10°C range is 100nV. For the latest package outline information and land patterns Setting this equal to 1/2LSB in a 16-bit system yields a (footprints), go to
www.maximintegrated.com/packages
. Note full-scale range of 13mV. With a single 2.7V supply, an that a “+”, “#”, or “-” in the package code indicates RoHS status acceptable closed-loop gain is AV = 200. This provides only. Package drawings may show a different suffix character, but sufficient gain while maintaining headroom. the drawing pertains to the package regardles of RoHS status.
PACKAGE PACKAGE OUTLINE LAND TYPE CODE NO. PATTERN NO.
6 SOT23 U6F-6
21-0058 90-0175
8 SO S8-4
21-0041 90-0096
6 TDFN-EP T633+2
21-0137 90-0058
www.maximintegrated.com Maxim Integrated │ 8
