Datasheet MAX4230, MAX4231, MAX4232, MAX4233, MAX4234 (Maxim) - 9
| Manufacturer | Maxim |
| Description | High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 |
| Pages / Page | 15 / 9 — MAX4230. MAX4231. 60mW Single-Supply Stereo. Headphone Driver |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
MAX4230. MAX4231. 60mW Single-Supply Stereo. Headphone Driver
Model Line for this Datasheet
- MAX4230AUK MAX4230AUK+ MAX4230AUK+G103 MAX4230AUK+T MAX4230AUK+TG103 MAX4230AXK MAX4230AXK+ MAX4230AXK+C7W MAX4230AXK+T MAX4230AXK+TG05 MAX4230AXK+TG071 MAX4230AXK-T MAX4230AXK/V+ MAX4230AXK/V+T
- MAX4231ART+ MAX4231ART+T MAX4231AUT MAX4231AUT+ MAX4231AUT+T MAX4231AXT MAX4231AXT+ MAX4231AXT+T MAX4231AYT+ MAX4231AYT+C7G MAX4231AYT+T
- MAX4232AKA MAX4232AKA+ MAX4232AKA+C2F MAX4232AKA+T MAX4232AKA+T10 MAX4232AKA+TG002 MAX4232AKA+TG05 MAX4232AKA+TG069 MAX4232AKA+TGC1 MAX4232AKA/V+ MAX4232AKA/V+T MAX4232AUA MAX4232AUA+ MAX4232AUA+T MAX4232AUA/GG8
Text Version of Document
link to page 9 link to page 9 link to page 9 link to page 2 link to page 9 MAX4230–MAX4234 High-Output-Drive, 10MHz, 10V/μs, Rail-to-Rail I/O Op Amps with Shutdown in SC70 RF 3.6V CIN R LEFT IN C AUDIO INPUT OUT HEADPHONE JACK R TO 32Ω STEREO HEADSET C
MAX4230
VIN = 2VP-P
MAX4231
VBIAS
MAX4230
R COUT 32Ω CIN R RIGHT IN AUDIO INPUT RF Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation Figure 2. Circuit Example: Adding a Coupling Capacitor Greatly Circuit Example Reduces Power Dissipation of its Package For example, the circuit in Figure 1 has a package power V dissipation of 196mW: PEAK R V MS ≅ 2 PEAK V RMS ≅ ( 1.0V DD V − DC V ) + = = 0.707V 2 RMS 2 1.0V = 3.6V −1.8V + = 2.507 I 1.0V / 32Ω R V MS PEAK I ≅ I + = 0A + 2 RMS DC 2 2 IPEAK 1.8V 1.0V / 32 I Ω = 22.1mA RMS ≅ IDC + = + RMS 2 32Ω 2 Therefore: = 78.4mARMS where: I P C(DISS) = RM V S IRMS COS θ VDC = the DC component of the output voltage. = 15.6mW IDC = the DC component of the output current. If the configuration in Figure 1 were used with all four of VPEAK = the highest positive excursion of the AC compo- the MAX4234 amplifiers, the absolute maximum power nent of the output voltage. dissipation rating of this package would be exceeded (see I the PEAK = the highest positive excursion of the AC compo- Absolute Maximum Ratings section). nent of the output current.
60mW Single-Supply Stereo
Therefore:
Headphone Driver
Two MAX4230/MAX4231s can be used as a single-supply, I P C(DISS) = RM V S IRMS COS θ stereo headphone driver. The circuit shown in Figure 2 can = 196mW deliver 60mW per channel with 1% distortion from a single 5V supply. Adding a coupling capacitor improves the package power The input capacitor (C dissipation because there is no DC current to the load, as IN), in conjunction with RIN, forms a highpass filter that removes the DC bias from the incom- shown in Figure 2: ing signal. The -3dB point of the highpass filter is given by 1 f 3 − dB = 2 R π INCIN www.maximintegrated.com Maxim Integrated │ 9
MAX4230
VIN = 2VP-P
MAX4231
VBIAS
MAX4230
R COUT 32Ω CIN R RIGHT IN AUDIO INPUT RF Figure 1. MAX4230/MAX4231 Used in Single-Supply Operation Figure 2. Circuit Example: Adding a Coupling Capacitor Greatly Circuit Example Reduces Power Dissipation of its Package For example, the circuit in Figure 1 has a package power V dissipation of 196mW: PEAK R V MS ≅ 2 PEAK V RMS ≅ ( 1.0V DD V − DC V ) + = = 0.707V 2 RMS 2 1.0V = 3.6V −1.8V + = 2.507 I 1.0V / 32Ω R V MS PEAK I ≅ I + = 0A + 2 RMS DC 2 2 IPEAK 1.8V 1.0V / 32 I Ω = 22.1mA RMS ≅ IDC + = + RMS 2 32Ω 2 Therefore: = 78.4mARMS where: I P C(DISS) = RM V S IRMS COS θ VDC = the DC component of the output voltage. = 15.6mW IDC = the DC component of the output current. If the configuration in Figure 1 were used with all four of VPEAK = the highest positive excursion of the AC compo- the MAX4234 amplifiers, the absolute maximum power nent of the output voltage. dissipation rating of this package would be exceeded (see I the PEAK = the highest positive excursion of the AC compo- Absolute Maximum Ratings section). nent of the output current.
60mW Single-Supply Stereo
Therefore:
Headphone Driver
Two MAX4230/MAX4231s can be used as a single-supply, I P C(DISS) = RM V S IRMS COS θ stereo headphone driver. The circuit shown in Figure 2 can = 196mW deliver 60mW per channel with 1% distortion from a single 5V supply. Adding a coupling capacitor improves the package power The input capacitor (C dissipation because there is no DC current to the load, as IN), in conjunction with RIN, forms a highpass filter that removes the DC bias from the incom- shown in Figure 2: ing signal. The -3dB point of the highpass filter is given by 1 f 3 − dB = 2 R π INCIN www.maximintegrated.com Maxim Integrated │ 9
